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Posted to users@tomcat.apache.org by Shawn Zernik <sz...@internetworkconsulting.net> on 2003/08/08 04:55:40 UTC
Custom Tag Lib
Tomcat Users:
I've been fighting with some version differences in tom cat wondering why my
app acts severly different on Tomcat 4.1.27 then 4.0.6. It appears that
4.1.27 is not working from my perspective, and have been fighting with it
since monday. None of the books I have touch this subject or ellude to the
problem, and I've seached high and low for solutions.
I'm having a problem working with my custom tag library. The stange part to
this is it appears to work on tomcat 4.0.6 but not on 4.1.27. The library
has a tage called site that extends a base tag, and those tags use other
classes in my data namespace to hit a database.
The tags are returning the proper data in both versions, but in 4.1.27, I
have to "reload" the contect in the manager for it to "register" the changes
from the database. I have added some printlns to std out to track what's
going on. In tomcat 4.0.6 they are going through all the code as I would
exspect it to. I have included each of the class files that are called. I
have also included the printouts from both versions of tomcat to clierify
how each version is handling the calls.
The object hiarchey goes as follows:
jPublish.Tags site extends inc_tag.
jPublish.Data.site_manager extends jPublish.Data.manager, managers contain,
load, and fill datas.
jPublish.Data.site_data extends jPublish.Data.data, used for storing data
and tracking updates.
--- INDEX.JSP ---
<%@ page contentType="text/html" %>
<%@ taglib prefix="inc" uri="inc" %>
<inc:site site="1" action="none"/>
<html>
<head><title><inc:site action="title" /></title></head>
<body>
<h1>Welcome to <inc:site action="title"/>!</h1>
© <inc:site action="copyright"/>
</body>
</html>
--- TOMCAT 4.0.6 STDOUT ---
Starting service Tomcat-Standalone
Apache Tomcat/4.0.6
Starting service Tomcat-Apache
Apache Tomcat/4.0.6
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.setSite()
jPublish.Data.manager()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
Shawn
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.setSite()
jPublish.Data.manager()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
INC
jPublish.Tags.site.doEndTag(): End
--- TOMCAT 4.1.27 STDOUT: db INC then Shawn ---
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.setSite()
jPublish.Data.manager()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.site.loaded()
INC
jPublish.Tags.site.doEndTag(): End
<Change INC to Shawn in DB>
jPublish.Tags.site.setSite()
jPublish.Data.manager()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.site.doEndTag(): End
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.site.loaded()
INC
jPublish.Tags.site.doEndTag(): End
--- SITE TAG "inc:site" ---
package jPublish.Tags;
import jPublish.Data.*;
public class site extends inc_tag {
private site_data objSite;
// Constructors
////////////////////////////////////////////////////////////
public site() {
objManager = (manager) new site_manager();
System.out.println("jPublish.Tags.site()");
}
// Properties
//////////////////////////////////////////////////////////////
public void setSite(String strNew) {
System.out.println("jPublish.Tags.site.setSite()");
objManager = (manager) new site_manager();
objManager.setWhere("id = " + strNew);
}
// Methods
/////////////////////////////////////////////////////////////////
protected boolean loaded() {
if(super.loaded()) {
objSite = (site_data) objData;
System.out.println("jPublish.Tags.site.loaded()");
return true;
} else
return false;
}
public int doEndTag() {
System.out.println("jPublish.Tags.site.doEndTag(): Begin");
if(strAction.equalsIgnoreCase("id"))
if(loaded()) print(Long.toString(objSite.getID()));
if(strAction.equalsIgnoreCase("design"))
if(loaded()) print(Long.toString(objSite.getDesign()));
if(strAction.equalsIgnoreCase("title"))
if(loaded()) print(objSite.getTitle());
if(strAction.equalsIgnoreCase("webmaster"))
if(loaded()) print(objSite.getWebmaster());
if(strAction.equalsIgnoreCase("email"))
if(loaded()) print(objSite.getEmail());
if(strAction.equalsIgnoreCase("copyright"))
if(loaded()) print(objSite.getCopyright());
if(strAction.equalsIgnoreCase("logo"))
if(loaded()) print(objSite.getLogo());
if(strAction.equalsIgnoreCase("next"))
if(objManager.next()) return this.EVAL_BODY_AGAIN;
System.out.println("jPublish.Tags.site.doEndTag(): End");
return this.SKIP_BODY;
}
}
--- INC_TAG ---
package jPublish.Tags;
import jPublish.Data.*;
import javax.servlet.*;
import javax.servlet.jsp.*;
import javax.servlet.jsp.tagext.*;
public abstract class inc_tag extends TagSupport {
// Data Menebers
///////////////////////////////////////////////////////////
protected manager objManager;
protected data objData;
protected String strWhere;
// Action Data
protected String strAction = "none";
private String strOutput = "none";
// Properties
//////////////////////////////////////////////////////////////
public void setAction(String strNew) { strAction = strNew; }
public void setOutput(String strNew) { strOutput = strNew; }
public manager getManager() { return objManager; }
// Internal Methods
////////////////////////////////////////////////////////
protected boolean loaded() {
System.out.println("jPublish.Tags.inc_tag.loaded()");
if(!(objData instanceof data)) {
System.out.println("jPublish.Tags.inc_tag.loaded(): not instance");
if(objManager.load()) {
System.out.println("jPublish.Tags.inc_tag.loaded(): load ok");
if(objManager.next()) {
System.out.println("jPublish.Tags.inc_tag.loaded(): next ok");
if(objManager.fill()) {
System.out.println("jPublish.Tags.inc_tag.loaded(): reached fill.");
objData = objManager.getData();
return true;
} else
return false;
}
} else
return false;
}
// Data Exist: Loaded
return true;
}
protected void print(String strOut) {
JspWriter out = pageContext.getOut();
System.out.println(strOut);
try { out.print(format(strOut)); }
catch (Exception e) { System.out.println("Exception error: " + e); }
}
protected String format(String strIn) {
String strTemp = new String();
char cTemp;
// String Safe
if(strOutput.equalsIgnoreCase("stringsafe")) {
for(int iCnt = 0; iCnt < strIn.length(); iCnt++) {
cTemp = strIn.charAt(iCnt);
switch(cTemp) {
case '\'':
strTemp += "\\\'";
break;
case '\"':
strTemp += "\\\"";
break;
case '\\':
strTemp += "\\\\";
break;
default:
strTemp += cTemp;
break;
}
}
return strTemp;
}
// Strip String
if(strOutput.equalsIgnoreCase("stringsafe")) {
for(int iCnt = 0; iCnt < strIn.length(); iCnt++) {
cTemp = strIn.charAt(iCnt);
switch(cTemp) {
case '\'':
break;
case '\"':
break;
default:
strTemp += cTemp;
break;
}
}
return strTemp;
}
// HTML Safe
if(strOutput.equalsIgnoreCase("htmlsafe")) {
for(int iCnt = 0; iCnt < strIn.length(); iCnt++) {
cTemp = strIn.charAt(iCnt);
switch(cTemp) {
case '<':
strTemp += "<";
break;
case '>':
strTemp += ">";
break;
default:
strTemp += cTemp;
break;
}
}
return strTemp;
}
// None
return strIn;
}
}
--- DATA.SITE_MANAGER ---
package jPublish.Data;
public class site_manager extends manager {
// Constructors
////////////////////////////////////////////////////////////
public site_manager() {
super();
super.setTable("sites");
}
// Methods
/////////////////////////////////////////////////////////////////
public boolean fill() {
site_data dataNew = new site_data();
try {
dataNew.setID(sqlResults.getLong("id"));
dataNew.setDesign(sqlResults.getLong("design"));
dataNew.setTitle(sqlResults.getString("title"));
dataNew.setWebmaster(sqlResults.getString("webmaster"));
dataNew.setEmail(sqlResults.getString("email"));
dataNew.setCopyright(sqlResults.getString("copyright"));
dataNew.setLogo(sqlResults.getString("logo"));
dataNew.setManager((manager) this);
dataNew.setLoaded();
objData = (data) dataNew;
return true;
}
catch (Exception e) {
strError = "Exception error: " + e;
}
return false;
}
}
--- DATA.SITE_DATA ---
package jPublish.Data;
public class site_data extends data {
// Data Menebers
///////////////////////////////////////////////////////////
private long lDesign;
private String strTitle;
private String strWebmaster;
private String strEmail;
private String strCopyright;
private String strLogo;
// Child Relationships
private section_manager objSections;
// Parent Relationships
private design_manager objDesigns;
// Constructors
////////////////////////////////////////////////////////////
public site_data() { super(); }
// Properties
//////////////////////////////////////////////////////////////
public boolean setDesign(long lNew) {
if(lNew > 0) {
lDesign = lNew;
objUpdates.set("design", Long.toString(lNew));
return true;
}
return false;
}
public boolean setTitle(String strNew) {
if(strNew.length() > 0) {
strTitle = strNew;
objUpdates.set("title", strNew);
return true;
}
return false;
}
public boolean setWebmaster(String strNew) {
if(strNew.length() > 0) {
strWebmaster = strNew;
objUpdates.set("webmaster", strNew);
return true;
}
return false;
}
public boolean setEmail(String strNew) {
if(strNew.length() > 0) {
strEmail = strNew;
objUpdates.set("email", strNew);
return true;
}
return false;
}
public boolean setCopyright(String strNew) {
if(strNew.length() > 0) {
strCopyright = strNew;
objUpdates.set("copyright", strNew);
return true;
}
return false;
}
public boolean setLogo(String strNew) {
if(strNew.length() > 0) {
strLogo = strNew;
objUpdates.set("logo", strNew);
return true;
}
return false;
}
public long getDesign() { return lDesign; }
public String getTitle() { return strTitle; }
public String getWebmaster() { return strWebmaster; }
public String getEmail() { return strEmail; }
public String getCopyright() { return strCopyright; }
public String getLogo() { return strLogo; }
// Child Relationships
public section_manager getSections() {
if(!(objSections instanceof section_manager)) {
objSections = new section_manager();
objSections.setWhere("site = " + this.getID());
objSections.load();
}
return objSections;
}
// Parent Relationships
public design_manager getParentDesign() {
if(!(objDesigns instanceof design_manager)) {
objDesigns = new design_manager();
objDesigns.setWhere("site = " + this.getDesign());
objDesigns.load();
}
return objDesigns;
}
}
--- DATA.MANAGER ---
package jPublish.Data;
import java.sql.*;
public abstract class manager extends Object {
// Data Members
////////////////////////////////////////////////////////////
protected data objData;
protected String strError = new String();
// SQL Options
private String strTable = new String();
private String strWhere = new String();
// Data SQL Connection
protected Connection sqlConnection;
protected Statement sqlStatement;
protected ResultSet sqlResults;
// Constructors
////////////////////////////////////////////////////////////
manager() {
System.out.println("jPublish.Data.manager()");
try {
Class.forName("com.mysql.jdbc.Driver").newInstance();
sqlConnection = DriverManager.getConnection(
"jdbc:mysql://localhost/jPublish", "root", "");
sqlStatement = sqlConnection.createStatement(
ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_UPDATABLE);
}
catch (Exception e) {
strError = "Execption error: " + e;
}
}
// Properties
//////////////////////////////////////////////////////////////
public boolean setTable(String strNew) {
if((strNew instanceof String) && (strNew.length() > 0)) {
strTable = strNew;
return true;
} else
return false;
}
public boolean setWhere(String strNew) {
if((strNew instanceof String) && (strNew.length() > 0)) {
if(strWhere.length() > 0)
strWhere += " AND " + strNew;
else
strWhere = strNew;
return true;
} else
return false;
}
public data getData() { return objData; }
public String getError() { return strError; }
public String getTable() { return strTable; }
public String getWhere() { return strWhere; }
public int getCount() {
int iCurr = -1;
int iLast = -1;
try {
iCurr = sqlResults.getRow();
sqlResults.last();
iLast = sqlResults.getRow();
sqlResults.absolute(iCurr);
}
catch (Exception e) { strError = "Exception Error: " + e; }
return iLast;
}
// Methods
/////////////////////////////////////////////////////////////////
public boolean load() {
String strQuery = "";
System.out.println("jPublish.Data.manager.load()");
// Build the Query
strQuery = strQuery + "SELECT * ";
strQuery = strQuery + " FROM " + strTable;
if(strWhere.length() > 0)
strQuery = strQuery + " WHERE " + strWhere;
// Get Results
try {
sqlResults = sqlStatement.executeQuery(strQuery);
}
// Get Errors
catch (Exception e) {
strError = "Exception error: " + e;
return false;
}
return true;
}
public boolean loadFrom(String strTable, String strColumn) {
String strQuery = "";
// Build the Query
strQuery = strQuery + "SELECT " + this.strTable + ".* ";
strQuery = strQuery + " FROM " + strTable + ", " + this.strTable;
strQuery = strQuery + " WHERE " + strTable + "." + strColumn;
strQuery = strQuery + " = " + this.strTable + ".id;";
// Get Results
try {
sqlResults = sqlStatement.executeQuery(strQuery);
}
// Get Errors
catch (Exception e) {
strError = "Exception error: " + e;
return false;
}
return true;
}
public boolean next() {
try { return sqlResults.next(); }
catch (Exception e) {
strError = "Exception error: " + e;
return false;
}
}
public boolean save() {
// Create Varibles
updates objUpdates = objData.getUpdates();
Object[] arrKeys = objUpdates.getKeys();
try {
// Update Record
for(int iCnt = 0; iCnt < arrKeys.length; iCnt++)
sqlResults.updateString(arrKeys[iCnt].toString(),
objUpdates.get(arrKeys[iCnt].toString()));
// Write Changes
if(objData.getID() > 0)
sqlResults.updateRow();
else
sqlResults.insertRow();
}
// Update Errors
catch (Exception e) {
// Set Error
strError = "Exception error: " + e;
return false;
}
return true;
}
// Abstract Functions
//////////////////////////////////////////////////////
// These must be implimented since the extended object only know the
tables.
public abstract boolean fill();
}
--- DATA.MANAGER ---
package jPublish.Data;
import java.sql.*;
public abstract class manager extends Object {
// Data Members
////////////////////////////////////////////////////////////
protected data objData;
protected String strError = new String();
// SQL Options
private String strTable = new String();
private String strWhere = new String();
// Data SQL Connection
protected Connection sqlConnection;
protected Statement sqlStatement;
protected ResultSet sqlResults;
// Constructors
////////////////////////////////////////////////////////////
manager() {
System.out.println("jPublish.Data.manager()");
try {
Class.forName("com.mysql.jdbc.Driver").newInstance();
sqlConnection = DriverManager.getConnection(
"jdbc:mysql://localhost/jPublish", "root", "");
sqlStatement = sqlConnection.createStatement(
ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_UPDATABLE);
}
catch (Exception e) {
strError = "Execption error: " + e;
}
}
// Properties
//////////////////////////////////////////////////////////////
public boolean setTable(String strNew) {
if((strNew instanceof String) && (strNew.length() > 0)) {
strTable = strNew;
return true;
} else
return false;
}
public boolean setWhere(String strNew) {
if((strNew instanceof String) && (strNew.length() > 0)) {
if(strWhere.length() > 0)
strWhere += " AND " + strNew;
else
strWhere = strNew;
return true;
} else
return false;
}
public data getData() { return objData; }
public String getError() { return strError; }
public String getTable() { return strTable; }
public String getWhere() { return strWhere; }
public int getCount() {
int iCurr = -1;
int iLast = -1;
try {
iCurr = sqlResults.getRow();
sqlResults.last();
iLast = sqlResults.getRow();
sqlResults.absolute(iCurr);
}
catch (Exception e) { strError = "Exception Error: " + e; }
return iLast;
}
// Methods
/////////////////////////////////////////////////////////////////
public boolean load() {
String strQuery = "";
System.out.println("jPublish.Data.manager.load()");
// Build the Query
strQuery = strQuery + "SELECT * ";
strQuery = strQuery + " FROM " + strTable;
if(strWhere.length() > 0)
strQuery = strQuery + " WHERE " + strWhere;
// Get Results
try {
sqlResults = sqlStatement.executeQuery(strQuery);
}
// Get Errors
catch (Exception e) {
strError = "Exception error: " + e;
return false;
}
return true;
}
public boolean loadFrom(String strTable, String strColumn) {
String strQuery = "";
// Build the Query
strQuery = strQuery + "SELECT " + this.strTable + ".* ";
strQuery = strQuery + " FROM " + strTable + ", " + this.strTable;
strQuery = strQuery + " WHERE " + strTable + "." + strColumn;
strQuery = strQuery + " = " + this.strTable + ".id;";
// Get Results
try {
sqlResults = sqlStatement.executeQuery(strQuery);
}
// Get Errors
catch (Exception e) {
strError = "Exception error: " + e;
return false;
}
return true;
}
public boolean next() {
try { return sqlResults.next(); }
catch (Exception e) {
strError = "Exception error: " + e;
return false;
}
}
public boolean save() {
// Create Varibles
updates objUpdates = objData.getUpdates();
Object[] arrKeys = objUpdates.getKeys();
try {
// Update Record
for(int iCnt = 0; iCnt < arrKeys.length; iCnt++)
sqlResults.updateString(arrKeys[iCnt].toString(),
objUpdates.get(arrKeys[iCnt].toString()));
// Write Changes
if(objData.getID() > 0)
sqlResults.updateRow();
else
sqlResults.insertRow();
}
// Update Errors
catch (Exception e) {
// Set Error
strError = "Exception error: " + e;
return false;
}
return true;
}
// Abstract Functions
//////////////////////////////////////////////////////
// These must be implimented since the extended object only know the
tables.
public abstract boolean fill();
}
--- DATA.DATA ---
package jPublish.Data;
public abstract class data extends Object {
// Data Menebers
///////////////////////////////////////////////////////////
protected manager objManager;
// Update Tracking
protected updates objUpdates;
// Data
protected long lID;
// Constructors
////////////////////////////////////////////////////////////
data () {
objUpdates = new updates();
}
// Properties
//////////////////////////////////////////////////////////////
public boolean setManager(manager manNew) {
if(manNew != null) {
objManager = manNew;
return true;
}
return false;
}
public boolean setLoaded() { return objUpdates.setUpdated(); }
public manager getManager() { return objManager; }
public updates getUpdates() { return objUpdates; }
// Data Properties
public boolean setID(long lNew) {
if(lNew > 0) {
lID = lNew;
objUpdates.set("id", Long.toString(lNew));
return true;
}
return false;
}
public long getID() { return lID; }
}
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RE: Custom Tag Lib
Posted by "Mike Cherichetti (Renegade Internet)" <mi...@renegadeinternet.com>.
I should have been more clear. If you have tags without body content, call
release() at the end of doStartTag(). If you have tags with body content,
call release() at the end of doAfterBody(). This has worked rather well for
me. Perhaps implement TryCatchFinally would be a little cleaner.
Mike
-----Original Message-----
From: Jon Wingfield [mailto:jon.wingfield@mkodo.com]
Sent: Friday, August 08, 2003 5:08 AM
To: Tomcat Users List
Subject: Re: Custom Tag Lib
Yikes, calling release() in doStartTag() stops any state being
accessible to child (body) tags. That would kill our custom iterator tags.
You could have your tags implement the TryCatchFinally interface,
instead. That way you'll have a chance to reset state before reuse:
http://jakarta.apache.org/taglibs/guidelines.html
I've seen posts on this list saying that tag pooling has either made
their site a dog or has given a huge positive performance gain. For our
site, which has many tags per page, it is the latter case :) If you're
thinking about turning pooling off you'll need to test the effects on
performance.
Jon
PS We had to go through this process on the upgrade. I share your pain
Mike Cherichetti (Renegade Internet) wrote:
> Shawn,
>
> I ran into this problem as well when switching from 4.0 to 4.1. I think
it
> has something to do with 4.1 pooling and re-using tag objects. What I did
> in all of my doStartTag(), doAfterBody(), etc... methods was manually call
> release() to reset the data in the tags like so:
>
> public int doStartTag() throws JspException
> {
> try
> {
> ...
> }
>
> catch (Exception exception)
> {
> throw new JspException(exception);
> }
>
> finally
> {
> release();
> }
>
> return SKIP_BODY;
> }
>
> Have a nice day ...
>
> Sincerely,
>
> Mike Cherichetti
> Renegade Internet
> Internet Advertising Delivery Solutions
> www.renegadeinternet.com
> Phone (724) 658-6346
> Fax (724) 658-6346
>
>
> -----Original Message-----
> From: Shawn Zernik [mailto:szernik@internetworkconsulting.net]
> Sent: Thursday, August 07, 2003 10:56 PM
> To: tomcat-user@jakarta.apache.org
> Subject: Custom Tag Lib
>
>
> Tomcat Users:
>
> I've been fighting with some version differences in tom cat wondering why
my
> app acts severly different on Tomcat 4.1.27 then 4.0.6. It appears that
> 4.1.27 is not working from my perspective, and have been fighting with it
> since monday. None of the books I have touch this subject or ellude to
the
> problem, and I've seached high and low for solutions.
>
> I'm having a problem working with my custom tag library. The stange part
to
> this is it appears to work on tomcat 4.0.6 but not on 4.1.27. The library
> has a tage called site that extends a base tag, and those tags use other
> classes in my data namespace to hit a database.
>
> The tags are returning the proper data in both versions, but in 4.1.27, I
> have to "reload" the contect in the manager for it to "register" the
changes
> from the database. I have added some printlns to std out to track what's
> going on. In tomcat 4.0.6 they are going through all the code as I would
> exspect it to. I have included each of the class files that are called.
I
> have also included the printouts from both versions of tomcat to clierify
> how each version is handling the calls.
>
> The object hiarchey goes as follows:
>
> jPublish.Tags site extends inc_tag.
> jPublish.Data.site_manager extends jPublish.Data.manager, managers
contain,
> load, and fill datas.
> jPublish.Data.site_data extends jPublish.Data.data, used for storing data
> and tracking updates.
>
>
> --- INDEX.JSP ---
> <%@ page contentType="text/html" %>
> <%@ taglib prefix="inc" uri="inc" %>
> <inc:site site="1" action="none"/>
> <html>
> <head><title><inc:site action="title" /></title></head>
>
> <body>
> <h1>Welcome to <inc:site action="title"/>!</h1>
> © <inc:site action="copyright"/>
> </body>
> </html>
>
> --- TOMCAT 4.0.6 STDOUT ---
> Starting service Tomcat-Standalone
> Apache Tomcat/4.0.6
> Starting service Tomcat-Apache
> Apache Tomcat/4.0.6
> jPublish.Data.manager()
> jPublish.Tags.site()
> jPublish.Tags.site.setSite()
> jPublish.Data.manager()
> jPublish.Tags.site.doEndTag(): Begin
> jPublish.Tags.site.doEndTag(): End
> jPublish.Data.manager()
> jPublish.Tags.site()
> jPublish.Tags.site.doEndTag(): Begin
> jPublish.Tags.inc_tag.loaded()
> jPublish.Tags.inc_tag.loaded(): not instance
> jPublish.Data.manager.load()
> jPublish.Tags.inc_tag.loaded(): load ok
> jPublish.Tags.inc_tag.loaded(): next ok
> jPublish.Tags.inc_tag.loaded(): reached fill.
> jPublish.Tags.site.loaded()
> Internetwork Consulting
> jPublish.Tags.site.doEndTag(): End
> jPublish.Data.manager()
> jPublish.Tags.site()
> jPublish.Tags.site.doEndTag(): Begin
> jPublish.Tags.inc_tag.loaded()
> jPublish.Tags.inc_tag.loaded(): not instance
> jPublish.Data.manager.load()
> jPublish.Tags.inc_tag.loaded(): load ok
> jPublish.Tags.inc_tag.loaded(): next ok
> jPublish.Tags.inc_tag.loaded(): reached fill.
> jPublish.Tags.site.loaded()
> Internetwork Consulting
> jPublish.Tags.site.doEndTag(): End
> jPublish.Data.manager()
> jPublish.Tags.site()
> jPublish.Tags.site.doEndTag(): Begin
> jPublish.Tags.inc_tag.loaded()
> jPublish.Tags.inc_tag.loaded(): not instance
> jPublish.Data.manager.load()
> jPublish.Tags.inc_tag.loaded(): load ok
> jPublish.Tags.inc_tag.loaded(): next ok
> jPublish.Tags.inc_tag.loaded(): reached fill.
> jPublish.Tags.site.loaded()
> Shawn
> jPublish.Tags.site.doEndTag(): End
>
> jPublish.Data.manager()
> jPublish.Tags.site()
> jPublish.Tags.site.setSite()
> jPublish.Data.manager()
> jPublish.Tags.site.doEndTag(): Begin
> jPublish.Tags.site.doEndTag(): End
> jPublish.Data.manager()
> jPublish.Tags.site()
> jPublish.Tags.site.doEndTag(): Begin
> jPublish.Tags.inc_tag.loaded()
> jPublish.Tags.inc_tag.loaded(): not instance
> jPublish.Data.manager.load()
> jPublish.Tags.inc_tag.loaded(): load ok
> jPublish.Tags.inc_tag.loaded(): next ok
> jPublish.Tags.inc_tag.loaded(): reached fill.
> jPublish.Tags.site.loaded()
> Internetwork Consulting
> jPublish.Tags.site.doEndTag(): End
> jPublish.Data.manager()
> jPublish.Tags.site()
> jPublish.Tags.site.doEndTag(): Begin
> jPublish.Tags.inc_tag.loaded()
> jPublish.Tags.inc_tag.loaded(): not instance
> jPublish.Data.manager.load()
> jPublish.Tags.inc_tag.loaded(): load ok
> jPublish.Tags.inc_tag.loaded(): next ok
> jPublish.Tags.inc_tag.loaded(): reached fill.
> jPublish.Tags.site.loaded()
> Internetwork Consulting
> jPublish.Tags.site.doEndTag(): End
> jPublish.Data.manager()
> jPublish.Tags.site()
> jPublish.Tags.site.doEndTag(): Begin
> jPublish.Tags.inc_tag.loaded()
> jPublish.Tags.inc_tag.loaded(): not instance
> jPublish.Data.manager.load()
> jPublish.Tags.inc_tag.loaded(): load ok
> jPublish.Tags.inc_tag.loaded(): next ok
> jPublish.Tags.inc_tag.loaded(): reached fill.
> jPublish.Tags.site.loaded()
> INC
> jPublish.Tags.site.doEndTag(): End
>
> --- TOMCAT 4.1.27 STDOUT: db INC then Shawn ---
> jPublish.Data.manager()
> jPublish.Tags.site()
> jPublish.Tags.site.setSite()
> jPublish.Data.manager()
> jPublish.Tags.site.doEndTag(): Begin
> jPublish.Tags.site.doEndTag(): End
> jPublish.Data.manager()
> jPublish.Tags.site()
> jPublish.Tags.site.doEndTag(): Begin
> jPublish.Tags.inc_tag.loaded()
> jPublish.Tags.inc_tag.loaded(): not instance
> jPublish.Data.manager.load()
> jPublish.Tags.inc_tag.loaded(): load ok
> jPublish.Tags.inc_tag.loaded(): next ok
> jPublish.Tags.inc_tag.loaded(): reached fill.
> jPublish.Tags.site.loaded()
> Internetwork Consulting
> jPublish.Tags.site.doEndTag(): End
> jPublish.Tags.site.doEndTag(): Begin
> jPublish.Tags.inc_tag.loaded()
> jPublish.Tags.site.loaded()
> Internetwork Consulting
> jPublish.Tags.site.doEndTag(): End
> jPublish.Tags.site.doEndTag(): Begin
> jPublish.Tags.inc_tag.loaded()
> jPublish.Tags.site.loaded()
> INC
> jPublish.Tags.site.doEndTag(): End
>
> <Change INC to Shawn in DB>
> jPublish.Tags.site.setSite()
> jPublish.Data.manager()
> jPublish.Tags.site.doEndTag(): Begin
> jPublish.Tags.site.doEndTag(): End
> jPublish.Tags.site.doEndTag(): Begin
> jPublish.Tags.inc_tag.loaded()
> jPublish.Tags.site.loaded()
> Internetwork Consulting
> jPublish.Tags.site.doEndTag(): End
> jPublish.Tags.site.doEndTag(): Begin
> jPublish.Tags.inc_tag.loaded()
> jPublish.Tags.site.loaded()
> Internetwork Consulting
> jPublish.Tags.site.doEndTag(): End
> jPublish.Tags.site.doEndTag(): Begin
> jPublish.Tags.inc_tag.loaded()
> jPublish.Tags.site.loaded()
> INC
> jPublish.Tags.site.doEndTag(): End
>
> --- SITE TAG "inc:site" ---
> package jPublish.Tags;
>
> import jPublish.Data.*;
>
> public class site extends inc_tag {
> private site_data objSite;
>
> // Constructors
> ////////////////////////////////////////////////////////////
> public site() {
> objManager = (manager) new site_manager();
> System.out.println("jPublish.Tags.site()");
> }
>
> // Properties
> //////////////////////////////////////////////////////////////
> public void setSite(String strNew) {
> System.out.println("jPublish.Tags.site.setSite()");
> objManager = (manager) new site_manager();
> objManager.setWhere("id = " + strNew);
> }
>
> // Methods
> /////////////////////////////////////////////////////////////////
> protected boolean loaded() {
> if(super.loaded()) {
> objSite = (site_data) objData;
> System.out.println("jPublish.Tags.site.loaded()");
> return true;
> } else
> return false;
> }
>
> public int doEndTag() {
> System.out.println("jPublish.Tags.site.doEndTag(): Begin");
>
> if(strAction.equalsIgnoreCase("id"))
> if(loaded()) print(Long.toString(objSite.getID()));
>
> if(strAction.equalsIgnoreCase("design"))
> if(loaded()) print(Long.toString(objSite.getDesign()));
>
> if(strAction.equalsIgnoreCase("title"))
> if(loaded()) print(objSite.getTitle());
>
> if(strAction.equalsIgnoreCase("webmaster"))
> if(loaded()) print(objSite.getWebmaster());
>
> if(strAction.equalsIgnoreCase("email"))
> if(loaded()) print(objSite.getEmail());
>
> if(strAction.equalsIgnoreCase("copyright"))
> if(loaded()) print(objSite.getCopyright());
>
> if(strAction.equalsIgnoreCase("logo"))
> if(loaded()) print(objSite.getLogo());
>
> if(strAction.equalsIgnoreCase("next"))
> if(objManager.next()) return this.EVAL_BODY_AGAIN;
>
> System.out.println("jPublish.Tags.site.doEndTag(): End");
>
> return this.SKIP_BODY;
> }
> }
>
> --- INC_TAG ---
> package jPublish.Tags;
>
> import jPublish.Data.*;
> import javax.servlet.*;
> import javax.servlet.jsp.*;
> import javax.servlet.jsp.tagext.*;
>
> public abstract class inc_tag extends TagSupport {
> // Data Menebers
> ///////////////////////////////////////////////////////////
> protected manager objManager;
> protected data objData;
> protected String strWhere;
>
> // Action Data
> protected String strAction = "none";
> private String strOutput = "none";
>
> // Properties
> //////////////////////////////////////////////////////////////
> public void setAction(String strNew) { strAction = strNew; }
> public void setOutput(String strNew) { strOutput = strNew; }
> public manager getManager() { return objManager; }
>
> // Internal Methods
> ////////////////////////////////////////////////////////
> protected boolean loaded() {
> System.out.println("jPublish.Tags.inc_tag.loaded()");
> if(!(objData instanceof data)) {
> System.out.println("jPublish.Tags.inc_tag.loaded(): not instance");
> if(objManager.load()) {
> System.out.println("jPublish.Tags.inc_tag.loaded(): load ok");
> if(objManager.next()) {
> System.out.println("jPublish.Tags.inc_tag.loaded(): next ok");
> if(objManager.fill()) {
> System.out.println("jPublish.Tags.inc_tag.loaded(): reached fill.");
> objData = objManager.getData();
> return true;
> } else
> return false;
> }
> } else
> return false;
> }
>
> // Data Exist: Loaded
> return true;
> }
>
> protected void print(String strOut) {
> JspWriter out = pageContext.getOut();
>
> System.out.println(strOut);
> try { out.print(format(strOut)); }
> catch (Exception e) { System.out.println("Exception error: " + e); }
> }
>
> protected String format(String strIn) {
> String strTemp = new String();
> char cTemp;
>
> // String Safe
> if(strOutput.equalsIgnoreCase("stringsafe")) {
> for(int iCnt = 0; iCnt < strIn.length(); iCnt++) {
> cTemp = strIn.charAt(iCnt);
> switch(cTemp) {
> case '\'':
> strTemp += "\\\'";
> break;
> case '\"':
> strTemp += "\\\"";
> break;
> case '\\':
> strTemp += "\\\\";
> break;
> default:
> strTemp += cTemp;
> break;
> }
> }
> return strTemp;
> }
>
> // Strip String
> if(strOutput.equalsIgnoreCase("stringsafe")) {
> for(int iCnt = 0; iCnt < strIn.length(); iCnt++) {
> cTemp = strIn.charAt(iCnt);
> switch(cTemp) {
> case '\'':
> break;
> case '\"':
> break;
> default:
> strTemp += cTemp;
> break;
> }
> }
> return strTemp;
> }
>
> // HTML Safe
> if(strOutput.equalsIgnoreCase("htmlsafe")) {
> for(int iCnt = 0; iCnt < strIn.length(); iCnt++) {
> cTemp = strIn.charAt(iCnt);
> switch(cTemp) {
> case '<':
> strTemp += "<";
> break;
> case '>':
> strTemp += ">";
> break;
> default:
> strTemp += cTemp;
> break;
> }
> }
> return strTemp;
> }
>
> // None
> return strIn;
> }
> }
>
> --- DATA.SITE_MANAGER ---
> package jPublish.Data;
>
> public class site_manager extends manager {
> // Constructors
> ////////////////////////////////////////////////////////////
> public site_manager() {
> super();
> super.setTable("sites");
> }
>
> // Methods
> /////////////////////////////////////////////////////////////////
> public boolean fill() {
> site_data dataNew = new site_data();
>
> try {
> dataNew.setID(sqlResults.getLong("id"));
> dataNew.setDesign(sqlResults.getLong("design"));
> dataNew.setTitle(sqlResults.getString("title"));
> dataNew.setWebmaster(sqlResults.getString("webmaster"));
> dataNew.setEmail(sqlResults.getString("email"));
> dataNew.setCopyright(sqlResults.getString("copyright"));
> dataNew.setLogo(sqlResults.getString("logo"));
>
> dataNew.setManager((manager) this);
> dataNew.setLoaded();
> objData = (data) dataNew;
> return true;
> }
>
> catch (Exception e) {
> strError = "Exception error: " + e;
> }
>
> return false;
> }
> }
>
> --- DATA.SITE_DATA ---
> package jPublish.Data;
>
> public class site_data extends data {
> // Data Menebers
> ///////////////////////////////////////////////////////////
> private long lDesign;
> private String strTitle;
> private String strWebmaster;
> private String strEmail;
> private String strCopyright;
> private String strLogo;
> // Child Relationships
> private section_manager objSections;
> // Parent Relationships
> private design_manager objDesigns;
>
> // Constructors
> ////////////////////////////////////////////////////////////
> public site_data() { super(); }
>
> // Properties
> //////////////////////////////////////////////////////////////
> public boolean setDesign(long lNew) {
> if(lNew > 0) {
> lDesign = lNew;
> objUpdates.set("design", Long.toString(lNew));
> return true;
> }
>
> return false;
> }
>
> public boolean setTitle(String strNew) {
> if(strNew.length() > 0) {
> strTitle = strNew;
> objUpdates.set("title", strNew);
> return true;
> }
>
> return false;
> }
>
> public boolean setWebmaster(String strNew) {
> if(strNew.length() > 0) {
> strWebmaster = strNew;
> objUpdates.set("webmaster", strNew);
> return true;
> }
>
> return false;
> }
>
> public boolean setEmail(String strNew) {
> if(strNew.length() > 0) {
> strEmail = strNew;
> objUpdates.set("email", strNew);
> return true;
> }
>
> return false;
> }
>
> public boolean setCopyright(String strNew) {
> if(strNew.length() > 0) {
> strCopyright = strNew;
> objUpdates.set("copyright", strNew);
> return true;
> }
>
> return false;
> }
>
> public boolean setLogo(String strNew) {
> if(strNew.length() > 0) {
> strLogo = strNew;
> objUpdates.set("logo", strNew);
> return true;
> }
>
> return false;
> }
>
> public long getDesign() { return lDesign; }
> public String getTitle() { return strTitle; }
> public String getWebmaster() { return strWebmaster; }
> public String getEmail() { return strEmail; }
> public String getCopyright() { return strCopyright; }
> public String getLogo() { return strLogo; }
>
> // Child Relationships
> public section_manager getSections() {
> if(!(objSections instanceof section_manager)) {
> objSections = new section_manager();
> objSections.setWhere("site = " + this.getID());
> objSections.load();
> }
> return objSections;
> }
>
> // Parent Relationships
> public design_manager getParentDesign() {
> if(!(objDesigns instanceof design_manager)) {
> objDesigns = new design_manager();
> objDesigns.setWhere("site = " + this.getDesign());
> objDesigns.load();
> }
> return objDesigns;
> }
> }
>
> --- DATA.MANAGER ---
> package jPublish.Data;
> import java.sql.*;
>
> public abstract class manager extends Object {
> // Data Members
> ////////////////////////////////////////////////////////////
> protected data objData;
> protected String strError = new String();
>
> // SQL Options
> private String strTable = new String();
> private String strWhere = new String();
>
> // Data SQL Connection
> protected Connection sqlConnection;
> protected Statement sqlStatement;
> protected ResultSet sqlResults;
>
> // Constructors
> ////////////////////////////////////////////////////////////
> manager() {
> System.out.println("jPublish.Data.manager()");
>
> try {
> Class.forName("com.mysql.jdbc.Driver").newInstance();
>
> sqlConnection = DriverManager.getConnection(
> "jdbc:mysql://localhost/jPublish", "root", "");
> sqlStatement = sqlConnection.createStatement(
> ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_UPDATABLE);
> }
>
> catch (Exception e) {
> strError = "Execption error: " + e;
> }
> }
>
> // Properties
> //////////////////////////////////////////////////////////////
> public boolean setTable(String strNew) {
> if((strNew instanceof String) && (strNew.length() > 0)) {
> strTable = strNew;
> return true;
> } else
> return false;
> }
>
> public boolean setWhere(String strNew) {
> if((strNew instanceof String) && (strNew.length() > 0)) {
> if(strWhere.length() > 0)
> strWhere += " AND " + strNew;
> else
> strWhere = strNew;
>
> return true;
> } else
> return false;
> }
>
> public data getData() { return objData; }
> public String getError() { return strError; }
>
> public String getTable() { return strTable; }
> public String getWhere() { return strWhere; }
> public int getCount() {
> int iCurr = -1;
> int iLast = -1;
>
> try {
> iCurr = sqlResults.getRow();
> sqlResults.last();
> iLast = sqlResults.getRow();
> sqlResults.absolute(iCurr);
> }
> catch (Exception e) { strError = "Exception Error: " + e; }
>
> return iLast;
> }
>
> // Methods
> /////////////////////////////////////////////////////////////////
> public boolean load() {
> String strQuery = "";
>
> System.out.println("jPublish.Data.manager.load()");
>
> // Build the Query
> strQuery = strQuery + "SELECT * ";
> strQuery = strQuery + " FROM " + strTable;
> if(strWhere.length() > 0)
> strQuery = strQuery + " WHERE " + strWhere;
>
> // Get Results
> try {
> sqlResults = sqlStatement.executeQuery(strQuery);
> }
>
> // Get Errors
> catch (Exception e) {
> strError = "Exception error: " + e;
> return false;
> }
>
> return true;
> }
>
> public boolean loadFrom(String strTable, String strColumn) {
> String strQuery = "";
>
> // Build the Query
> strQuery = strQuery + "SELECT " + this.strTable + ".* ";
> strQuery = strQuery + " FROM " + strTable + ", " + this.strTable;
> strQuery = strQuery + " WHERE " + strTable + "." + strColumn;
> strQuery = strQuery + " = " + this.strTable + ".id;";
>
> // Get Results
> try {
> sqlResults = sqlStatement.executeQuery(strQuery);
> }
>
> // Get Errors
> catch (Exception e) {
> strError = "Exception error: " + e;
> return false;
> }
>
> return true;
> }
>
> public boolean next() {
> try { return sqlResults.next(); }
> catch (Exception e) {
> strError = "Exception error: " + e;
> return false;
> }
> }
>
> public boolean save() {
> // Create Varibles
> updates objUpdates = objData.getUpdates();
> Object[] arrKeys = objUpdates.getKeys();
>
> try {
> // Update Record
> for(int iCnt = 0; iCnt < arrKeys.length; iCnt++)
> sqlResults.updateString(arrKeys[iCnt].toString(),
> objUpdates.get(arrKeys[iCnt].toString()));
>
> // Write Changes
> if(objData.getID() > 0)
> sqlResults.updateRow();
> else
> sqlResults.insertRow();
> }
>
> // Update Errors
> catch (Exception e) {
> // Set Error
> strError = "Exception error: " + e;
> return false;
> }
>
> return true;
> }
> // Abstract Functions
> //////////////////////////////////////////////////////
> // These must be implimented since the extended object only know the
> tables.
> public abstract boolean fill();
> }
>
> --- DATA.MANAGER ---
> package jPublish.Data;
> import java.sql.*;
>
> public abstract class manager extends Object {
> // Data Members
> ////////////////////////////////////////////////////////////
> protected data objData;
> protected String strError = new String();
>
> // SQL Options
> private String strTable = new String();
> private String strWhere = new String();
>
> // Data SQL Connection
> protected Connection sqlConnection;
> protected Statement sqlStatement;
> protected ResultSet sqlResults;
>
> // Constructors
> ////////////////////////////////////////////////////////////
> manager() {
> System.out.println("jPublish.Data.manager()");
>
> try {
> Class.forName("com.mysql.jdbc.Driver").newInstance();
>
> sqlConnection = DriverManager.getConnection(
> "jdbc:mysql://localhost/jPublish", "root", "");
> sqlStatement = sqlConnection.createStatement(
> ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_UPDATABLE);
> }
>
> catch (Exception e) {
> strError = "Execption error: " + e;
> }
> }
>
> // Properties
> //////////////////////////////////////////////////////////////
> public boolean setTable(String strNew) {
> if((strNew instanceof String) && (strNew.length() > 0)) {
> strTable = strNew;
> return true;
> } else
> return false;
> }
>
> public boolean setWhere(String strNew) {
> if((strNew instanceof String) && (strNew.length() > 0)) {
> if(strWhere.length() > 0)
> strWhere += " AND " + strNew;
> else
> strWhere = strNew;
>
> return true;
> } else
> return false;
> }
>
> public data getData() { return objData; }
> public String getError() { return strError; }
>
> public String getTable() { return strTable; }
> public String getWhere() { return strWhere; }
> public int getCount() {
> int iCurr = -1;
> int iLast = -1;
>
> try {
> iCurr = sqlResults.getRow();
> sqlResults.last();
> iLast = sqlResults.getRow();
> sqlResults.absolute(iCurr);
> }
> catch (Exception e) { strError = "Exception Error: " + e; }
>
> return iLast;
> }
>
> // Methods
> /////////////////////////////////////////////////////////////////
> public boolean load() {
> String strQuery = "";
>
> System.out.println("jPublish.Data.manager.load()");
>
> // Build the Query
> strQuery = strQuery + "SELECT * ";
> strQuery = strQuery + " FROM " + strTable;
> if(strWhere.length() > 0)
> strQuery = strQuery + " WHERE " + strWhere;
>
> // Get Results
> try {
> sqlResults = sqlStatement.executeQuery(strQuery);
> }
>
> // Get Errors
> catch (Exception e) {
> strError = "Exception error: " + e;
> return false;
> }
>
> return true;
> }
>
> public boolean loadFrom(String strTable, String strColumn) {
> String strQuery = "";
>
> // Build the Query
> strQuery = strQuery + "SELECT " + this.strTable + ".* ";
> strQuery = strQuery + " FROM " + strTable + ", " + this.strTable;
> strQuery = strQuery + " WHERE " + strTable + "." + strColumn;
> strQuery = strQuery + " = " + this.strTable + ".id;";
>
> // Get Results
> try {
> sqlResults = sqlStatement.executeQuery(strQuery);
> }
>
> // Get Errors
> catch (Exception e) {
> strError = "Exception error: " + e;
> return false;
> }
>
> return true;
> }
>
> public boolean next() {
> try { return sqlResults.next(); }
> catch (Exception e) {
> strError = "Exception error: " + e;
> return false;
> }
> }
>
> public boolean save() {
> // Create Varibles
> updates objUpdates = objData.getUpdates();
> Object[] arrKeys = objUpdates.getKeys();
>
> try {
> // Update Record
> for(int iCnt = 0; iCnt < arrKeys.length; iCnt++)
> sqlResults.updateString(arrKeys[iCnt].toString(),
> objUpdates.get(arrKeys[iCnt].toString()));
>
> // Write Changes
> if(objData.getID() > 0)
> sqlResults.updateRow();
> else
> sqlResults.insertRow();
> }
>
> // Update Errors
> catch (Exception e) {
> // Set Error
> strError = "Exception error: " + e;
> return false;
> }
>
> return true;
> }
> // Abstract Functions
> //////////////////////////////////////////////////////
> // These must be implimented since the extended object only know the
> tables.
> public abstract boolean fill();
> }
>
> --- DATA.DATA ---
> package jPublish.Data;
>
> public abstract class data extends Object {
> // Data Menebers
> ///////////////////////////////////////////////////////////
> protected manager objManager;
>
> // Update Tracking
> protected updates objUpdates;
>
> // Data
> protected long lID;
>
> // Constructors
> ////////////////////////////////////////////////////////////
> data () {
> objUpdates = new updates();
> }
>
> // Properties
> //////////////////////////////////////////////////////////////
> public boolean setManager(manager manNew) {
> if(manNew != null) {
> objManager = manNew;
> return true;
> }
>
> return false;
> }
>
> public boolean setLoaded() { return objUpdates.setUpdated(); }
>
> public manager getManager() { return objManager; }
> public updates getUpdates() { return objUpdates; }
>
> // Data Properties
> public boolean setID(long lNew) {
> if(lNew > 0) {
> lID = lNew;
> objUpdates.set("id", Long.toString(lNew));
> return true;
> }
>
> return false;
> }
>
> public long getID() { return lID; }
> }
>
>
> ---------------------------------------------------------------------
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> For additional commands, e-mail: tomcat-user-help@jakarta.apache.org
>
>
>
>
>
>
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RE: Custom Tag Lib
Posted by "Mike Cherichetti (Renegade Internet)" <mi...@renegadeinternet.com>.
I should have been more clear. If you have tags without body content, call
release() at the end of doStartTag(). If you have tags with body content,
call release() at the end of doAfterBody(). This has worked rather well for
me. Perhaps implement TryCatchFinally would be a little cleaner.
Mike
-----Original Message-----
From: Jon Wingfield [mailto:jon.wingfield@mkodo.com]
Sent: Friday, August 08, 2003 5:08 AM
To: Tomcat Users List
Subject: Re: Custom Tag Lib
Yikes, calling release() in doStartTag() stops any state being
accessible to child (body) tags. That would kill our custom iterator tags.
You could have your tags implement the TryCatchFinally interface,
instead. That way you'll have a chance to reset state before reuse:
http://jakarta.apache.org/taglibs/guidelines.html
I've seen posts on this list saying that tag pooling has either made
their site a dog or has given a huge positive performance gain. For our
site, which has many tags per page, it is the latter case :) If you're
thinking about turning pooling off you'll need to test the effects on
performance.
Jon
PS We had to go through this process on the upgrade. I share your pain
Mike Cherichetti (Renegade Internet) wrote:
> Shawn,
>
> I ran into this problem as well when switching from 4.0 to 4.1. I think
it
> has something to do with 4.1 pooling and re-using tag objects. What I did
> in all of my doStartTag(), doAfterBody(), etc... methods was manually call
> release() to reset the data in the tags like so:
>
> public int doStartTag() throws JspException
> {
> try
> {
> ...
> }
>
> catch (Exception exception)
> {
> throw new JspException(exception);
> }
>
> finally
> {
> release();
> }
>
> return SKIP_BODY;
> }
>
> Have a nice day ...
>
> Sincerely,
>
> Mike Cherichetti
> Renegade Internet
> Internet Advertising Delivery Solutions
> www.renegadeinternet.com
> Phone (724) 658-6346
> Fax (724) 658-6346
>
>
> -----Original Message-----
> From: Shawn Zernik [mailto:szernik@internetworkconsulting.net]
> Sent: Thursday, August 07, 2003 10:56 PM
> To: tomcat-user@jakarta.apache.org
> Subject: Custom Tag Lib
>
>
> Tomcat Users:
>
> I've been fighting with some version differences in tom cat wondering why
my
> app acts severly different on Tomcat 4.1.27 then 4.0.6. It appears that
> 4.1.27 is not working from my perspective, and have been fighting with it
> since monday. None of the books I have touch this subject or ellude to
the
> problem, and I've seached high and low for solutions.
>
> I'm having a problem working with my custom tag library. The stange part
to
> this is it appears to work on tomcat 4.0.6 but not on 4.1.27. The library
> has a tage called site that extends a base tag, and those tags use other
> classes in my data namespace to hit a database.
>
> The tags are returning the proper data in both versions, but in 4.1.27, I
> have to "reload" the contect in the manager for it to "register" the
changes
> from the database. I have added some printlns to std out to track what's
> going on. In tomcat 4.0.6 they are going through all the code as I would
> exspect it to. I have included each of the class files that are called.
I
> have also included the printouts from both versions of tomcat to clierify
> how each version is handling the calls.
>
> The object hiarchey goes as follows:
>
> jPublish.Tags site extends inc_tag.
> jPublish.Data.site_manager extends jPublish.Data.manager, managers
contain,
> load, and fill datas.
> jPublish.Data.site_data extends jPublish.Data.data, used for storing data
> and tracking updates.
>
>
> --- INDEX.JSP ---
> <%@ page contentType="text/html" %>
> <%@ taglib prefix="inc" uri="inc" %>
> <inc:site site="1" action="none"/>
> <html>
> <head><title><inc:site action="title" /></title></head>
>
> <body>
> <h1>Welcome to <inc:site action="title"/>!</h1>
> © <inc:site action="copyright"/>
> </body>
> </html>
>
> --- TOMCAT 4.0.6 STDOUT ---
> Starting service Tomcat-Standalone
> Apache Tomcat/4.0.6
> Starting service Tomcat-Apache
> Apache Tomcat/4.0.6
> jPublish.Data.manager()
> jPublish.Tags.site()
> jPublish.Tags.site.setSite()
> jPublish.Data.manager()
> jPublish.Tags.site.doEndTag(): Begin
> jPublish.Tags.site.doEndTag(): End
> jPublish.Data.manager()
> jPublish.Tags.site()
> jPublish.Tags.site.doEndTag(): Begin
> jPublish.Tags.inc_tag.loaded()
> jPublish.Tags.inc_tag.loaded(): not instance
> jPublish.Data.manager.load()
> jPublish.Tags.inc_tag.loaded(): load ok
> jPublish.Tags.inc_tag.loaded(): next ok
> jPublish.Tags.inc_tag.loaded(): reached fill.
> jPublish.Tags.site.loaded()
> Internetwork Consulting
> jPublish.Tags.site.doEndTag(): End
> jPublish.Data.manager()
> jPublish.Tags.site()
> jPublish.Tags.site.doEndTag(): Begin
> jPublish.Tags.inc_tag.loaded()
> jPublish.Tags.inc_tag.loaded(): not instance
> jPublish.Data.manager.load()
> jPublish.Tags.inc_tag.loaded(): load ok
> jPublish.Tags.inc_tag.loaded(): next ok
> jPublish.Tags.inc_tag.loaded(): reached fill.
> jPublish.Tags.site.loaded()
> Internetwork Consulting
> jPublish.Tags.site.doEndTag(): End
> jPublish.Data.manager()
> jPublish.Tags.site()
> jPublish.Tags.site.doEndTag(): Begin
> jPublish.Tags.inc_tag.loaded()
> jPublish.Tags.inc_tag.loaded(): not instance
> jPublish.Data.manager.load()
> jPublish.Tags.inc_tag.loaded(): load ok
> jPublish.Tags.inc_tag.loaded(): next ok
> jPublish.Tags.inc_tag.loaded(): reached fill.
> jPublish.Tags.site.loaded()
> Shawn
> jPublish.Tags.site.doEndTag(): End
>
> jPublish.Data.manager()
> jPublish.Tags.site()
> jPublish.Tags.site.setSite()
> jPublish.Data.manager()
> jPublish.Tags.site.doEndTag(): Begin
> jPublish.Tags.site.doEndTag(): End
> jPublish.Data.manager()
> jPublish.Tags.site()
> jPublish.Tags.site.doEndTag(): Begin
> jPublish.Tags.inc_tag.loaded()
> jPublish.Tags.inc_tag.loaded(): not instance
> jPublish.Data.manager.load()
> jPublish.Tags.inc_tag.loaded(): load ok
> jPublish.Tags.inc_tag.loaded(): next ok
> jPublish.Tags.inc_tag.loaded(): reached fill.
> jPublish.Tags.site.loaded()
> Internetwork Consulting
> jPublish.Tags.site.doEndTag(): End
> jPublish.Data.manager()
> jPublish.Tags.site()
> jPublish.Tags.site.doEndTag(): Begin
> jPublish.Tags.inc_tag.loaded()
> jPublish.Tags.inc_tag.loaded(): not instance
> jPublish.Data.manager.load()
> jPublish.Tags.inc_tag.loaded(): load ok
> jPublish.Tags.inc_tag.loaded(): next ok
> jPublish.Tags.inc_tag.loaded(): reached fill.
> jPublish.Tags.site.loaded()
> Internetwork Consulting
> jPublish.Tags.site.doEndTag(): End
> jPublish.Data.manager()
> jPublish.Tags.site()
> jPublish.Tags.site.doEndTag(): Begin
> jPublish.Tags.inc_tag.loaded()
> jPublish.Tags.inc_tag.loaded(): not instance
> jPublish.Data.manager.load()
> jPublish.Tags.inc_tag.loaded(): load ok
> jPublish.Tags.inc_tag.loaded(): next ok
> jPublish.Tags.inc_tag.loaded(): reached fill.
> jPublish.Tags.site.loaded()
> INC
> jPublish.Tags.site.doEndTag(): End
>
> --- TOMCAT 4.1.27 STDOUT: db INC then Shawn ---
> jPublish.Data.manager()
> jPublish.Tags.site()
> jPublish.Tags.site.setSite()
> jPublish.Data.manager()
> jPublish.Tags.site.doEndTag(): Begin
> jPublish.Tags.site.doEndTag(): End
> jPublish.Data.manager()
> jPublish.Tags.site()
> jPublish.Tags.site.doEndTag(): Begin
> jPublish.Tags.inc_tag.loaded()
> jPublish.Tags.inc_tag.loaded(): not instance
> jPublish.Data.manager.load()
> jPublish.Tags.inc_tag.loaded(): load ok
> jPublish.Tags.inc_tag.loaded(): next ok
> jPublish.Tags.inc_tag.loaded(): reached fill.
> jPublish.Tags.site.loaded()
> Internetwork Consulting
> jPublish.Tags.site.doEndTag(): End
> jPublish.Tags.site.doEndTag(): Begin
> jPublish.Tags.inc_tag.loaded()
> jPublish.Tags.site.loaded()
> Internetwork Consulting
> jPublish.Tags.site.doEndTag(): End
> jPublish.Tags.site.doEndTag(): Begin
> jPublish.Tags.inc_tag.loaded()
> jPublish.Tags.site.loaded()
> INC
> jPublish.Tags.site.doEndTag(): End
>
> <Change INC to Shawn in DB>
> jPublish.Tags.site.setSite()
> jPublish.Data.manager()
> jPublish.Tags.site.doEndTag(): Begin
> jPublish.Tags.site.doEndTag(): End
> jPublish.Tags.site.doEndTag(): Begin
> jPublish.Tags.inc_tag.loaded()
> jPublish.Tags.site.loaded()
> Internetwork Consulting
> jPublish.Tags.site.doEndTag(): End
> jPublish.Tags.site.doEndTag(): Begin
> jPublish.Tags.inc_tag.loaded()
> jPublish.Tags.site.loaded()
> Internetwork Consulting
> jPublish.Tags.site.doEndTag(): End
> jPublish.Tags.site.doEndTag(): Begin
> jPublish.Tags.inc_tag.loaded()
> jPublish.Tags.site.loaded()
> INC
> jPublish.Tags.site.doEndTag(): End
>
> --- SITE TAG "inc:site" ---
> package jPublish.Tags;
>
> import jPublish.Data.*;
>
> public class site extends inc_tag {
> private site_data objSite;
>
> // Constructors
> ////////////////////////////////////////////////////////////
> public site() {
> objManager = (manager) new site_manager();
> System.out.println("jPublish.Tags.site()");
> }
>
> // Properties
> //////////////////////////////////////////////////////////////
> public void setSite(String strNew) {
> System.out.println("jPublish.Tags.site.setSite()");
> objManager = (manager) new site_manager();
> objManager.setWhere("id = " + strNew);
> }
>
> // Methods
> /////////////////////////////////////////////////////////////////
> protected boolean loaded() {
> if(super.loaded()) {
> objSite = (site_data) objData;
> System.out.println("jPublish.Tags.site.loaded()");
> return true;
> } else
> return false;
> }
>
> public int doEndTag() {
> System.out.println("jPublish.Tags.site.doEndTag(): Begin");
>
> if(strAction.equalsIgnoreCase("id"))
> if(loaded()) print(Long.toString(objSite.getID()));
>
> if(strAction.equalsIgnoreCase("design"))
> if(loaded()) print(Long.toString(objSite.getDesign()));
>
> if(strAction.equalsIgnoreCase("title"))
> if(loaded()) print(objSite.getTitle());
>
> if(strAction.equalsIgnoreCase("webmaster"))
> if(loaded()) print(objSite.getWebmaster());
>
> if(strAction.equalsIgnoreCase("email"))
> if(loaded()) print(objSite.getEmail());
>
> if(strAction.equalsIgnoreCase("copyright"))
> if(loaded()) print(objSite.getCopyright());
>
> if(strAction.equalsIgnoreCase("logo"))
> if(loaded()) print(objSite.getLogo());
>
> if(strAction.equalsIgnoreCase("next"))
> if(objManager.next()) return this.EVAL_BODY_AGAIN;
>
> System.out.println("jPublish.Tags.site.doEndTag(): End");
>
> return this.SKIP_BODY;
> }
> }
>
> --- INC_TAG ---
> package jPublish.Tags;
>
> import jPublish.Data.*;
> import javax.servlet.*;
> import javax.servlet.jsp.*;
> import javax.servlet.jsp.tagext.*;
>
> public abstract class inc_tag extends TagSupport {
> // Data Menebers
> ///////////////////////////////////////////////////////////
> protected manager objManager;
> protected data objData;
> protected String strWhere;
>
> // Action Data
> protected String strAction = "none";
> private String strOutput = "none";
>
> // Properties
> //////////////////////////////////////////////////////////////
> public void setAction(String strNew) { strAction = strNew; }
> public void setOutput(String strNew) { strOutput = strNew; }
> public manager getManager() { return objManager; }
>
> // Internal Methods
> ////////////////////////////////////////////////////////
> protected boolean loaded() {
> System.out.println("jPublish.Tags.inc_tag.loaded()");
> if(!(objData instanceof data)) {
> System.out.println("jPublish.Tags.inc_tag.loaded(): not instance");
> if(objManager.load()) {
> System.out.println("jPublish.Tags.inc_tag.loaded(): load ok");
> if(objManager.next()) {
> System.out.println("jPublish.Tags.inc_tag.loaded(): next ok");
> if(objManager.fill()) {
> System.out.println("jPublish.Tags.inc_tag.loaded(): reached fill.");
> objData = objManager.getData();
> return true;
> } else
> return false;
> }
> } else
> return false;
> }
>
> // Data Exist: Loaded
> return true;
> }
>
> protected void print(String strOut) {
> JspWriter out = pageContext.getOut();
>
> System.out.println(strOut);
> try { out.print(format(strOut)); }
> catch (Exception e) { System.out.println("Exception error: " + e); }
> }
>
> protected String format(String strIn) {
> String strTemp = new String();
> char cTemp;
>
> // String Safe
> if(strOutput.equalsIgnoreCase("stringsafe")) {
> for(int iCnt = 0; iCnt < strIn.length(); iCnt++) {
> cTemp = strIn.charAt(iCnt);
> switch(cTemp) {
> case '\'':
> strTemp += "\\\'";
> break;
> case '\"':
> strTemp += "\\\"";
> break;
> case '\\':
> strTemp += "\\\\";
> break;
> default:
> strTemp += cTemp;
> break;
> }
> }
> return strTemp;
> }
>
> // Strip String
> if(strOutput.equalsIgnoreCase("stringsafe")) {
> for(int iCnt = 0; iCnt < strIn.length(); iCnt++) {
> cTemp = strIn.charAt(iCnt);
> switch(cTemp) {
> case '\'':
> break;
> case '\"':
> break;
> default:
> strTemp += cTemp;
> break;
> }
> }
> return strTemp;
> }
>
> // HTML Safe
> if(strOutput.equalsIgnoreCase("htmlsafe")) {
> for(int iCnt = 0; iCnt < strIn.length(); iCnt++) {
> cTemp = strIn.charAt(iCnt);
> switch(cTemp) {
> case '<':
> strTemp += "<";
> break;
> case '>':
> strTemp += ">";
> break;
> default:
> strTemp += cTemp;
> break;
> }
> }
> return strTemp;
> }
>
> // None
> return strIn;
> }
> }
>
> --- DATA.SITE_MANAGER ---
> package jPublish.Data;
>
> public class site_manager extends manager {
> // Constructors
> ////////////////////////////////////////////////////////////
> public site_manager() {
> super();
> super.setTable("sites");
> }
>
> // Methods
> /////////////////////////////////////////////////////////////////
> public boolean fill() {
> site_data dataNew = new site_data();
>
> try {
> dataNew.setID(sqlResults.getLong("id"));
> dataNew.setDesign(sqlResults.getLong("design"));
> dataNew.setTitle(sqlResults.getString("title"));
> dataNew.setWebmaster(sqlResults.getString("webmaster"));
> dataNew.setEmail(sqlResults.getString("email"));
> dataNew.setCopyright(sqlResults.getString("copyright"));
> dataNew.setLogo(sqlResults.getString("logo"));
>
> dataNew.setManager((manager) this);
> dataNew.setLoaded();
> objData = (data) dataNew;
> return true;
> }
>
> catch (Exception e) {
> strError = "Exception error: " + e;
> }
>
> return false;
> }
> }
>
> --- DATA.SITE_DATA ---
> package jPublish.Data;
>
> public class site_data extends data {
> // Data Menebers
> ///////////////////////////////////////////////////////////
> private long lDesign;
> private String strTitle;
> private String strWebmaster;
> private String strEmail;
> private String strCopyright;
> private String strLogo;
> // Child Relationships
> private section_manager objSections;
> // Parent Relationships
> private design_manager objDesigns;
>
> // Constructors
> ////////////////////////////////////////////////////////////
> public site_data() { super(); }
>
> // Properties
> //////////////////////////////////////////////////////////////
> public boolean setDesign(long lNew) {
> if(lNew > 0) {
> lDesign = lNew;
> objUpdates.set("design", Long.toString(lNew));
> return true;
> }
>
> return false;
> }
>
> public boolean setTitle(String strNew) {
> if(strNew.length() > 0) {
> strTitle = strNew;
> objUpdates.set("title", strNew);
> return true;
> }
>
> return false;
> }
>
> public boolean setWebmaster(String strNew) {
> if(strNew.length() > 0) {
> strWebmaster = strNew;
> objUpdates.set("webmaster", strNew);
> return true;
> }
>
> return false;
> }
>
> public boolean setEmail(String strNew) {
> if(strNew.length() > 0) {
> strEmail = strNew;
> objUpdates.set("email", strNew);
> return true;
> }
>
> return false;
> }
>
> public boolean setCopyright(String strNew) {
> if(strNew.length() > 0) {
> strCopyright = strNew;
> objUpdates.set("copyright", strNew);
> return true;
> }
>
> return false;
> }
>
> public boolean setLogo(String strNew) {
> if(strNew.length() > 0) {
> strLogo = strNew;
> objUpdates.set("logo", strNew);
> return true;
> }
>
> return false;
> }
>
> public long getDesign() { return lDesign; }
> public String getTitle() { return strTitle; }
> public String getWebmaster() { return strWebmaster; }
> public String getEmail() { return strEmail; }
> public String getCopyright() { return strCopyright; }
> public String getLogo() { return strLogo; }
>
> // Child Relationships
> public section_manager getSections() {
> if(!(objSections instanceof section_manager)) {
> objSections = new section_manager();
> objSections.setWhere("site = " + this.getID());
> objSections.load();
> }
> return objSections;
> }
>
> // Parent Relationships
> public design_manager getParentDesign() {
> if(!(objDesigns instanceof design_manager)) {
> objDesigns = new design_manager();
> objDesigns.setWhere("site = " + this.getDesign());
> objDesigns.load();
> }
> return objDesigns;
> }
> }
>
> --- DATA.MANAGER ---
> package jPublish.Data;
> import java.sql.*;
>
> public abstract class manager extends Object {
> // Data Members
> ////////////////////////////////////////////////////////////
> protected data objData;
> protected String strError = new String();
>
> // SQL Options
> private String strTable = new String();
> private String strWhere = new String();
>
> // Data SQL Connection
> protected Connection sqlConnection;
> protected Statement sqlStatement;
> protected ResultSet sqlResults;
>
> // Constructors
> ////////////////////////////////////////////////////////////
> manager() {
> System.out.println("jPublish.Data.manager()");
>
> try {
> Class.forName("com.mysql.jdbc.Driver").newInstance();
>
> sqlConnection = DriverManager.getConnection(
> "jdbc:mysql://localhost/jPublish", "root", "");
> sqlStatement = sqlConnection.createStatement(
> ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_UPDATABLE);
> }
>
> catch (Exception e) {
> strError = "Execption error: " + e;
> }
> }
>
> // Properties
> //////////////////////////////////////////////////////////////
> public boolean setTable(String strNew) {
> if((strNew instanceof String) && (strNew.length() > 0)) {
> strTable = strNew;
> return true;
> } else
> return false;
> }
>
> public boolean setWhere(String strNew) {
> if((strNew instanceof String) && (strNew.length() > 0)) {
> if(strWhere.length() > 0)
> strWhere += " AND " + strNew;
> else
> strWhere = strNew;
>
> return true;
> } else
> return false;
> }
>
> public data getData() { return objData; }
> public String getError() { return strError; }
>
> public String getTable() { return strTable; }
> public String getWhere() { return strWhere; }
> public int getCount() {
> int iCurr = -1;
> int iLast = -1;
>
> try {
> iCurr = sqlResults.getRow();
> sqlResults.last();
> iLast = sqlResults.getRow();
> sqlResults.absolute(iCurr);
> }
> catch (Exception e) { strError = "Exception Error: " + e; }
>
> return iLast;
> }
>
> // Methods
> /////////////////////////////////////////////////////////////////
> public boolean load() {
> String strQuery = "";
>
> System.out.println("jPublish.Data.manager.load()");
>
> // Build the Query
> strQuery = strQuery + "SELECT * ";
> strQuery = strQuery + " FROM " + strTable;
> if(strWhere.length() > 0)
> strQuery = strQuery + " WHERE " + strWhere;
>
> // Get Results
> try {
> sqlResults = sqlStatement.executeQuery(strQuery);
> }
>
> // Get Errors
> catch (Exception e) {
> strError = "Exception error: " + e;
> return false;
> }
>
> return true;
> }
>
> public boolean loadFrom(String strTable, String strColumn) {
> String strQuery = "";
>
> // Build the Query
> strQuery = strQuery + "SELECT " + this.strTable + ".* ";
> strQuery = strQuery + " FROM " + strTable + ", " + this.strTable;
> strQuery = strQuery + " WHERE " + strTable + "." + strColumn;
> strQuery = strQuery + " = " + this.strTable + ".id;";
>
> // Get Results
> try {
> sqlResults = sqlStatement.executeQuery(strQuery);
> }
>
> // Get Errors
> catch (Exception e) {
> strError = "Exception error: " + e;
> return false;
> }
>
> return true;
> }
>
> public boolean next() {
> try { return sqlResults.next(); }
> catch (Exception e) {
> strError = "Exception error: " + e;
> return false;
> }
> }
>
> public boolean save() {
> // Create Varibles
> updates objUpdates = objData.getUpdates();
> Object[] arrKeys = objUpdates.getKeys();
>
> try {
> // Update Record
> for(int iCnt = 0; iCnt < arrKeys.length; iCnt++)
> sqlResults.updateString(arrKeys[iCnt].toString(),
> objUpdates.get(arrKeys[iCnt].toString()));
>
> // Write Changes
> if(objData.getID() > 0)
> sqlResults.updateRow();
> else
> sqlResults.insertRow();
> }
>
> // Update Errors
> catch (Exception e) {
> // Set Error
> strError = "Exception error: " + e;
> return false;
> }
>
> return true;
> }
> // Abstract Functions
> //////////////////////////////////////////////////////
> // These must be implimented since the extended object only know the
> tables.
> public abstract boolean fill();
> }
>
> --- DATA.MANAGER ---
> package jPublish.Data;
> import java.sql.*;
>
> public abstract class manager extends Object {
> // Data Members
> ////////////////////////////////////////////////////////////
> protected data objData;
> protected String strError = new String();
>
> // SQL Options
> private String strTable = new String();
> private String strWhere = new String();
>
> // Data SQL Connection
> protected Connection sqlConnection;
> protected Statement sqlStatement;
> protected ResultSet sqlResults;
>
> // Constructors
> ////////////////////////////////////////////////////////////
> manager() {
> System.out.println("jPublish.Data.manager()");
>
> try {
> Class.forName("com.mysql.jdbc.Driver").newInstance();
>
> sqlConnection = DriverManager.getConnection(
> "jdbc:mysql://localhost/jPublish", "root", "");
> sqlStatement = sqlConnection.createStatement(
> ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_UPDATABLE);
> }
>
> catch (Exception e) {
> strError = "Execption error: " + e;
> }
> }
>
> // Properties
> //////////////////////////////////////////////////////////////
> public boolean setTable(String strNew) {
> if((strNew instanceof String) && (strNew.length() > 0)) {
> strTable = strNew;
> return true;
> } else
> return false;
> }
>
> public boolean setWhere(String strNew) {
> if((strNew instanceof String) && (strNew.length() > 0)) {
> if(strWhere.length() > 0)
> strWhere += " AND " + strNew;
> else
> strWhere = strNew;
>
> return true;
> } else
> return false;
> }
>
> public data getData() { return objData; }
> public String getError() { return strError; }
>
> public String getTable() { return strTable; }
> public String getWhere() { return strWhere; }
> public int getCount() {
> int iCurr = -1;
> int iLast = -1;
>
> try {
> iCurr = sqlResults.getRow();
> sqlResults.last();
> iLast = sqlResults.getRow();
> sqlResults.absolute(iCurr);
> }
> catch (Exception e) { strError = "Exception Error: " + e; }
>
> return iLast;
> }
>
> // Methods
> /////////////////////////////////////////////////////////////////
> public boolean load() {
> String strQuery = "";
>
> System.out.println("jPublish.Data.manager.load()");
>
> // Build the Query
> strQuery = strQuery + "SELECT * ";
> strQuery = strQuery + " FROM " + strTable;
> if(strWhere.length() > 0)
> strQuery = strQuery + " WHERE " + strWhere;
>
> // Get Results
> try {
> sqlResults = sqlStatement.executeQuery(strQuery);
> }
>
> // Get Errors
> catch (Exception e) {
> strError = "Exception error: " + e;
> return false;
> }
>
> return true;
> }
>
> public boolean loadFrom(String strTable, String strColumn) {
> String strQuery = "";
>
> // Build the Query
> strQuery = strQuery + "SELECT " + this.strTable + ".* ";
> strQuery = strQuery + " FROM " + strTable + ", " + this.strTable;
> strQuery = strQuery + " WHERE " + strTable + "." + strColumn;
> strQuery = strQuery + " = " + this.strTable + ".id;";
>
> // Get Results
> try {
> sqlResults = sqlStatement.executeQuery(strQuery);
> }
>
> // Get Errors
> catch (Exception e) {
> strError = "Exception error: " + e;
> return false;
> }
>
> return true;
> }
>
> public boolean next() {
> try { return sqlResults.next(); }
> catch (Exception e) {
> strError = "Exception error: " + e;
> return false;
> }
> }
>
> public boolean save() {
> // Create Varibles
> updates objUpdates = objData.getUpdates();
> Object[] arrKeys = objUpdates.getKeys();
>
> try {
> // Update Record
> for(int iCnt = 0; iCnt < arrKeys.length; iCnt++)
> sqlResults.updateString(arrKeys[iCnt].toString(),
> objUpdates.get(arrKeys[iCnt].toString()));
>
> // Write Changes
> if(objData.getID() > 0)
> sqlResults.updateRow();
> else
> sqlResults.insertRow();
> }
>
> // Update Errors
> catch (Exception e) {
> // Set Error
> strError = "Exception error: " + e;
> return false;
> }
>
> return true;
> }
> // Abstract Functions
> //////////////////////////////////////////////////////
> // These must be implimented since the extended object only know the
> tables.
> public abstract boolean fill();
> }
>
> --- DATA.DATA ---
> package jPublish.Data;
>
> public abstract class data extends Object {
> // Data Menebers
> ///////////////////////////////////////////////////////////
> protected manager objManager;
>
> // Update Tracking
> protected updates objUpdates;
>
> // Data
> protected long lID;
>
> // Constructors
> ////////////////////////////////////////////////////////////
> data () {
> objUpdates = new updates();
> }
>
> // Properties
> //////////////////////////////////////////////////////////////
> public boolean setManager(manager manNew) {
> if(manNew != null) {
> objManager = manNew;
> return true;
> }
>
> return false;
> }
>
> public boolean setLoaded() { return objUpdates.setUpdated(); }
>
> public manager getManager() { return objManager; }
> public updates getUpdates() { return objUpdates; }
>
> // Data Properties
> public boolean setID(long lNew) {
> if(lNew > 0) {
> lID = lNew;
> objUpdates.set("id", Long.toString(lNew));
> return true;
> }
>
> return false;
> }
>
> public long getID() { return lID; }
> }
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: tomcat-user-unsubscribe@jakarta.apache.org
> For additional commands, e-mail: tomcat-user-help@jakarta.apache.org
>
>
>
>
>
>
> ---------------------------------------------------------------------
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>
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For additional commands, e-mail: tomcat-user-help@jakarta.apache.org
Re: Custom Tag Lib
Posted by Jon Wingfield <jo...@mkodo.com>.
Yikes, calling release() in doStartTag() stops any state being
accessible to child (body) tags. That would kill our custom iterator tags.
You could have your tags implement the TryCatchFinally interface,
instead. That way you'll have a chance to reset state before reuse:
http://jakarta.apache.org/taglibs/guidelines.html
I've seen posts on this list saying that tag pooling has either made
their site a dog or has given a huge positive performance gain. For our
site, which has many tags per page, it is the latter case :) If you're
thinking about turning pooling off you'll need to test the effects on
performance.
Jon
PS We had to go through this process on the upgrade. I share your pain
Mike Cherichetti (Renegade Internet) wrote:
> Shawn,
>
> I ran into this problem as well when switching from 4.0 to 4.1. I think it
> has something to do with 4.1 pooling and re-using tag objects. What I did
> in all of my doStartTag(), doAfterBody(), etc... methods was manually call
> release() to reset the data in the tags like so:
>
> public int doStartTag() throws JspException
> {
> try
> {
> ...
> }
>
> catch (Exception exception)
> {
> throw new JspException(exception);
> }
>
> finally
> {
> release();
> }
>
> return SKIP_BODY;
> }
>
> Have a nice day ...
>
> Sincerely,
>
> Mike Cherichetti
> Renegade Internet
> Internet Advertising Delivery Solutions
> www.renegadeinternet.com
> Phone (724) 658-6346
> Fax (724) 658-6346
>
>
> -----Original Message-----
> From: Shawn Zernik [mailto:szernik@internetworkconsulting.net]
> Sent: Thursday, August 07, 2003 10:56 PM
> To: tomcat-user@jakarta.apache.org
> Subject: Custom Tag Lib
>
>
> Tomcat Users:
>
> I've been fighting with some version differences in tom cat wondering why my
> app acts severly different on Tomcat 4.1.27 then 4.0.6. It appears that
> 4.1.27 is not working from my perspective, and have been fighting with it
> since monday. None of the books I have touch this subject or ellude to the
> problem, and I've seached high and low for solutions.
>
> I'm having a problem working with my custom tag library. The stange part to
> this is it appears to work on tomcat 4.0.6 but not on 4.1.27. The library
> has a tage called site that extends a base tag, and those tags use other
> classes in my data namespace to hit a database.
>
> The tags are returning the proper data in both versions, but in 4.1.27, I
> have to "reload" the contect in the manager for it to "register" the changes
> from the database. I have added some printlns to std out to track what's
> going on. In tomcat 4.0.6 they are going through all the code as I would
> exspect it to. I have included each of the class files that are called. I
> have also included the printouts from both versions of tomcat to clierify
> how each version is handling the calls.
>
> The object hiarchey goes as follows:
>
> jPublish.Tags site extends inc_tag.
> jPublish.Data.site_manager extends jPublish.Data.manager, managers contain,
> load, and fill datas.
> jPublish.Data.site_data extends jPublish.Data.data, used for storing data
> and tracking updates.
>
>
> --- INDEX.JSP ---
> <%@ page contentType="text/html" %>
> <%@ taglib prefix="inc" uri="inc" %>
> <inc:site site="1" action="none"/>
> <html>
> <head><title><inc:site action="title" /></title></head>
>
> <body>
> <h1>Welcome to <inc:site action="title"/>!</h1>
> © <inc:site action="copyright"/>
> </body>
> </html>
>
> --- TOMCAT 4.0.6 STDOUT ---
> Starting service Tomcat-Standalone
> Apache Tomcat/4.0.6
> Starting service Tomcat-Apache
> Apache Tomcat/4.0.6
> jPublish.Data.manager()
> jPublish.Tags.site()
> jPublish.Tags.site.setSite()
> jPublish.Data.manager()
> jPublish.Tags.site.doEndTag(): Begin
> jPublish.Tags.site.doEndTag(): End
> jPublish.Data.manager()
> jPublish.Tags.site()
> jPublish.Tags.site.doEndTag(): Begin
> jPublish.Tags.inc_tag.loaded()
> jPublish.Tags.inc_tag.loaded(): not instance
> jPublish.Data.manager.load()
> jPublish.Tags.inc_tag.loaded(): load ok
> jPublish.Tags.inc_tag.loaded(): next ok
> jPublish.Tags.inc_tag.loaded(): reached fill.
> jPublish.Tags.site.loaded()
> Internetwork Consulting
> jPublish.Tags.site.doEndTag(): End
> jPublish.Data.manager()
> jPublish.Tags.site()
> jPublish.Tags.site.doEndTag(): Begin
> jPublish.Tags.inc_tag.loaded()
> jPublish.Tags.inc_tag.loaded(): not instance
> jPublish.Data.manager.load()
> jPublish.Tags.inc_tag.loaded(): load ok
> jPublish.Tags.inc_tag.loaded(): next ok
> jPublish.Tags.inc_tag.loaded(): reached fill.
> jPublish.Tags.site.loaded()
> Internetwork Consulting
> jPublish.Tags.site.doEndTag(): End
> jPublish.Data.manager()
> jPublish.Tags.site()
> jPublish.Tags.site.doEndTag(): Begin
> jPublish.Tags.inc_tag.loaded()
> jPublish.Tags.inc_tag.loaded(): not instance
> jPublish.Data.manager.load()
> jPublish.Tags.inc_tag.loaded(): load ok
> jPublish.Tags.inc_tag.loaded(): next ok
> jPublish.Tags.inc_tag.loaded(): reached fill.
> jPublish.Tags.site.loaded()
> Shawn
> jPublish.Tags.site.doEndTag(): End
>
> jPublish.Data.manager()
> jPublish.Tags.site()
> jPublish.Tags.site.setSite()
> jPublish.Data.manager()
> jPublish.Tags.site.doEndTag(): Begin
> jPublish.Tags.site.doEndTag(): End
> jPublish.Data.manager()
> jPublish.Tags.site()
> jPublish.Tags.site.doEndTag(): Begin
> jPublish.Tags.inc_tag.loaded()
> jPublish.Tags.inc_tag.loaded(): not instance
> jPublish.Data.manager.load()
> jPublish.Tags.inc_tag.loaded(): load ok
> jPublish.Tags.inc_tag.loaded(): next ok
> jPublish.Tags.inc_tag.loaded(): reached fill.
> jPublish.Tags.site.loaded()
> Internetwork Consulting
> jPublish.Tags.site.doEndTag(): End
> jPublish.Data.manager()
> jPublish.Tags.site()
> jPublish.Tags.site.doEndTag(): Begin
> jPublish.Tags.inc_tag.loaded()
> jPublish.Tags.inc_tag.loaded(): not instance
> jPublish.Data.manager.load()
> jPublish.Tags.inc_tag.loaded(): load ok
> jPublish.Tags.inc_tag.loaded(): next ok
> jPublish.Tags.inc_tag.loaded(): reached fill.
> jPublish.Tags.site.loaded()
> Internetwork Consulting
> jPublish.Tags.site.doEndTag(): End
> jPublish.Data.manager()
> jPublish.Tags.site()
> jPublish.Tags.site.doEndTag(): Begin
> jPublish.Tags.inc_tag.loaded()
> jPublish.Tags.inc_tag.loaded(): not instance
> jPublish.Data.manager.load()
> jPublish.Tags.inc_tag.loaded(): load ok
> jPublish.Tags.inc_tag.loaded(): next ok
> jPublish.Tags.inc_tag.loaded(): reached fill.
> jPublish.Tags.site.loaded()
> INC
> jPublish.Tags.site.doEndTag(): End
>
> --- TOMCAT 4.1.27 STDOUT: db INC then Shawn ---
> jPublish.Data.manager()
> jPublish.Tags.site()
> jPublish.Tags.site.setSite()
> jPublish.Data.manager()
> jPublish.Tags.site.doEndTag(): Begin
> jPublish.Tags.site.doEndTag(): End
> jPublish.Data.manager()
> jPublish.Tags.site()
> jPublish.Tags.site.doEndTag(): Begin
> jPublish.Tags.inc_tag.loaded()
> jPublish.Tags.inc_tag.loaded(): not instance
> jPublish.Data.manager.load()
> jPublish.Tags.inc_tag.loaded(): load ok
> jPublish.Tags.inc_tag.loaded(): next ok
> jPublish.Tags.inc_tag.loaded(): reached fill.
> jPublish.Tags.site.loaded()
> Internetwork Consulting
> jPublish.Tags.site.doEndTag(): End
> jPublish.Tags.site.doEndTag(): Begin
> jPublish.Tags.inc_tag.loaded()
> jPublish.Tags.site.loaded()
> Internetwork Consulting
> jPublish.Tags.site.doEndTag(): End
> jPublish.Tags.site.doEndTag(): Begin
> jPublish.Tags.inc_tag.loaded()
> jPublish.Tags.site.loaded()
> INC
> jPublish.Tags.site.doEndTag(): End
>
> <Change INC to Shawn in DB>
> jPublish.Tags.site.setSite()
> jPublish.Data.manager()
> jPublish.Tags.site.doEndTag(): Begin
> jPublish.Tags.site.doEndTag(): End
> jPublish.Tags.site.doEndTag(): Begin
> jPublish.Tags.inc_tag.loaded()
> jPublish.Tags.site.loaded()
> Internetwork Consulting
> jPublish.Tags.site.doEndTag(): End
> jPublish.Tags.site.doEndTag(): Begin
> jPublish.Tags.inc_tag.loaded()
> jPublish.Tags.site.loaded()
> Internetwork Consulting
> jPublish.Tags.site.doEndTag(): End
> jPublish.Tags.site.doEndTag(): Begin
> jPublish.Tags.inc_tag.loaded()
> jPublish.Tags.site.loaded()
> INC
> jPublish.Tags.site.doEndTag(): End
>
> --- SITE TAG "inc:site" ---
> package jPublish.Tags;
>
> import jPublish.Data.*;
>
> public class site extends inc_tag {
> private site_data objSite;
>
> // Constructors
> ////////////////////////////////////////////////////////////
> public site() {
> objManager = (manager) new site_manager();
> System.out.println("jPublish.Tags.site()");
> }
>
> // Properties
> //////////////////////////////////////////////////////////////
> public void setSite(String strNew) {
> System.out.println("jPublish.Tags.site.setSite()");
> objManager = (manager) new site_manager();
> objManager.setWhere("id = " + strNew);
> }
>
> // Methods
> /////////////////////////////////////////////////////////////////
> protected boolean loaded() {
> if(super.loaded()) {
> objSite = (site_data) objData;
> System.out.println("jPublish.Tags.site.loaded()");
> return true;
> } else
> return false;
> }
>
> public int doEndTag() {
> System.out.println("jPublish.Tags.site.doEndTag(): Begin");
>
> if(strAction.equalsIgnoreCase("id"))
> if(loaded()) print(Long.toString(objSite.getID()));
>
> if(strAction.equalsIgnoreCase("design"))
> if(loaded()) print(Long.toString(objSite.getDesign()));
>
> if(strAction.equalsIgnoreCase("title"))
> if(loaded()) print(objSite.getTitle());
>
> if(strAction.equalsIgnoreCase("webmaster"))
> if(loaded()) print(objSite.getWebmaster());
>
> if(strAction.equalsIgnoreCase("email"))
> if(loaded()) print(objSite.getEmail());
>
> if(strAction.equalsIgnoreCase("copyright"))
> if(loaded()) print(objSite.getCopyright());
>
> if(strAction.equalsIgnoreCase("logo"))
> if(loaded()) print(objSite.getLogo());
>
> if(strAction.equalsIgnoreCase("next"))
> if(objManager.next()) return this.EVAL_BODY_AGAIN;
>
> System.out.println("jPublish.Tags.site.doEndTag(): End");
>
> return this.SKIP_BODY;
> }
> }
>
> --- INC_TAG ---
> package jPublish.Tags;
>
> import jPublish.Data.*;
> import javax.servlet.*;
> import javax.servlet.jsp.*;
> import javax.servlet.jsp.tagext.*;
>
> public abstract class inc_tag extends TagSupport {
> // Data Menebers
> ///////////////////////////////////////////////////////////
> protected manager objManager;
> protected data objData;
> protected String strWhere;
>
> // Action Data
> protected String strAction = "none";
> private String strOutput = "none";
>
> // Properties
> //////////////////////////////////////////////////////////////
> public void setAction(String strNew) { strAction = strNew; }
> public void setOutput(String strNew) { strOutput = strNew; }
> public manager getManager() { return objManager; }
>
> // Internal Methods
> ////////////////////////////////////////////////////////
> protected boolean loaded() {
> System.out.println("jPublish.Tags.inc_tag.loaded()");
> if(!(objData instanceof data)) {
> System.out.println("jPublish.Tags.inc_tag.loaded(): not instance");
> if(objManager.load()) {
> System.out.println("jPublish.Tags.inc_tag.loaded(): load ok");
> if(objManager.next()) {
> System.out.println("jPublish.Tags.inc_tag.loaded(): next ok");
> if(objManager.fill()) {
> System.out.println("jPublish.Tags.inc_tag.loaded(): reached fill.");
> objData = objManager.getData();
> return true;
> } else
> return false;
> }
> } else
> return false;
> }
>
> // Data Exist: Loaded
> return true;
> }
>
> protected void print(String strOut) {
> JspWriter out = pageContext.getOut();
>
> System.out.println(strOut);
> try { out.print(format(strOut)); }
> catch (Exception e) { System.out.println("Exception error: " + e); }
> }
>
> protected String format(String strIn) {
> String strTemp = new String();
> char cTemp;
>
> // String Safe
> if(strOutput.equalsIgnoreCase("stringsafe")) {
> for(int iCnt = 0; iCnt < strIn.length(); iCnt++) {
> cTemp = strIn.charAt(iCnt);
> switch(cTemp) {
> case '\'':
> strTemp += "\\\'";
> break;
> case '\"':
> strTemp += "\\\"";
> break;
> case '\\':
> strTemp += "\\\\";
> break;
> default:
> strTemp += cTemp;
> break;
> }
> }
> return strTemp;
> }
>
> // Strip String
> if(strOutput.equalsIgnoreCase("stringsafe")) {
> for(int iCnt = 0; iCnt < strIn.length(); iCnt++) {
> cTemp = strIn.charAt(iCnt);
> switch(cTemp) {
> case '\'':
> break;
> case '\"':
> break;
> default:
> strTemp += cTemp;
> break;
> }
> }
> return strTemp;
> }
>
> // HTML Safe
> if(strOutput.equalsIgnoreCase("htmlsafe")) {
> for(int iCnt = 0; iCnt < strIn.length(); iCnt++) {
> cTemp = strIn.charAt(iCnt);
> switch(cTemp) {
> case '<':
> strTemp += "<";
> break;
> case '>':
> strTemp += ">";
> break;
> default:
> strTemp += cTemp;
> break;
> }
> }
> return strTemp;
> }
>
> // None
> return strIn;
> }
> }
>
> --- DATA.SITE_MANAGER ---
> package jPublish.Data;
>
> public class site_manager extends manager {
> // Constructors
> ////////////////////////////////////////////////////////////
> public site_manager() {
> super();
> super.setTable("sites");
> }
>
> // Methods
> /////////////////////////////////////////////////////////////////
> public boolean fill() {
> site_data dataNew = new site_data();
>
> try {
> dataNew.setID(sqlResults.getLong("id"));
> dataNew.setDesign(sqlResults.getLong("design"));
> dataNew.setTitle(sqlResults.getString("title"));
> dataNew.setWebmaster(sqlResults.getString("webmaster"));
> dataNew.setEmail(sqlResults.getString("email"));
> dataNew.setCopyright(sqlResults.getString("copyright"));
> dataNew.setLogo(sqlResults.getString("logo"));
>
> dataNew.setManager((manager) this);
> dataNew.setLoaded();
> objData = (data) dataNew;
> return true;
> }
>
> catch (Exception e) {
> strError = "Exception error: " + e;
> }
>
> return false;
> }
> }
>
> --- DATA.SITE_DATA ---
> package jPublish.Data;
>
> public class site_data extends data {
> // Data Menebers
> ///////////////////////////////////////////////////////////
> private long lDesign;
> private String strTitle;
> private String strWebmaster;
> private String strEmail;
> private String strCopyright;
> private String strLogo;
> // Child Relationships
> private section_manager objSections;
> // Parent Relationships
> private design_manager objDesigns;
>
> // Constructors
> ////////////////////////////////////////////////////////////
> public site_data() { super(); }
>
> // Properties
> //////////////////////////////////////////////////////////////
> public boolean setDesign(long lNew) {
> if(lNew > 0) {
> lDesign = lNew;
> objUpdates.set("design", Long.toString(lNew));
> return true;
> }
>
> return false;
> }
>
> public boolean setTitle(String strNew) {
> if(strNew.length() > 0) {
> strTitle = strNew;
> objUpdates.set("title", strNew);
> return true;
> }
>
> return false;
> }
>
> public boolean setWebmaster(String strNew) {
> if(strNew.length() > 0) {
> strWebmaster = strNew;
> objUpdates.set("webmaster", strNew);
> return true;
> }
>
> return false;
> }
>
> public boolean setEmail(String strNew) {
> if(strNew.length() > 0) {
> strEmail = strNew;
> objUpdates.set("email", strNew);
> return true;
> }
>
> return false;
> }
>
> public boolean setCopyright(String strNew) {
> if(strNew.length() > 0) {
> strCopyright = strNew;
> objUpdates.set("copyright", strNew);
> return true;
> }
>
> return false;
> }
>
> public boolean setLogo(String strNew) {
> if(strNew.length() > 0) {
> strLogo = strNew;
> objUpdates.set("logo", strNew);
> return true;
> }
>
> return false;
> }
>
> public long getDesign() { return lDesign; }
> public String getTitle() { return strTitle; }
> public String getWebmaster() { return strWebmaster; }
> public String getEmail() { return strEmail; }
> public String getCopyright() { return strCopyright; }
> public String getLogo() { return strLogo; }
>
> // Child Relationships
> public section_manager getSections() {
> if(!(objSections instanceof section_manager)) {
> objSections = new section_manager();
> objSections.setWhere("site = " + this.getID());
> objSections.load();
> }
> return objSections;
> }
>
> // Parent Relationships
> public design_manager getParentDesign() {
> if(!(objDesigns instanceof design_manager)) {
> objDesigns = new design_manager();
> objDesigns.setWhere("site = " + this.getDesign());
> objDesigns.load();
> }
> return objDesigns;
> }
> }
>
> --- DATA.MANAGER ---
> package jPublish.Data;
> import java.sql.*;
>
> public abstract class manager extends Object {
> // Data Members
> ////////////////////////////////////////////////////////////
> protected data objData;
> protected String strError = new String();
>
> // SQL Options
> private String strTable = new String();
> private String strWhere = new String();
>
> // Data SQL Connection
> protected Connection sqlConnection;
> protected Statement sqlStatement;
> protected ResultSet sqlResults;
>
> // Constructors
> ////////////////////////////////////////////////////////////
> manager() {
> System.out.println("jPublish.Data.manager()");
>
> try {
> Class.forName("com.mysql.jdbc.Driver").newInstance();
>
> sqlConnection = DriverManager.getConnection(
> "jdbc:mysql://localhost/jPublish", "root", "");
> sqlStatement = sqlConnection.createStatement(
> ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_UPDATABLE);
> }
>
> catch (Exception e) {
> strError = "Execption error: " + e;
> }
> }
>
> // Properties
> //////////////////////////////////////////////////////////////
> public boolean setTable(String strNew) {
> if((strNew instanceof String) && (strNew.length() > 0)) {
> strTable = strNew;
> return true;
> } else
> return false;
> }
>
> public boolean setWhere(String strNew) {
> if((strNew instanceof String) && (strNew.length() > 0)) {
> if(strWhere.length() > 0)
> strWhere += " AND " + strNew;
> else
> strWhere = strNew;
>
> return true;
> } else
> return false;
> }
>
> public data getData() { return objData; }
> public String getError() { return strError; }
>
> public String getTable() { return strTable; }
> public String getWhere() { return strWhere; }
> public int getCount() {
> int iCurr = -1;
> int iLast = -1;
>
> try {
> iCurr = sqlResults.getRow();
> sqlResults.last();
> iLast = sqlResults.getRow();
> sqlResults.absolute(iCurr);
> }
> catch (Exception e) { strError = "Exception Error: " + e; }
>
> return iLast;
> }
>
> // Methods
> /////////////////////////////////////////////////////////////////
> public boolean load() {
> String strQuery = "";
>
> System.out.println("jPublish.Data.manager.load()");
>
> // Build the Query
> strQuery = strQuery + "SELECT * ";
> strQuery = strQuery + " FROM " + strTable;
> if(strWhere.length() > 0)
> strQuery = strQuery + " WHERE " + strWhere;
>
> // Get Results
> try {
> sqlResults = sqlStatement.executeQuery(strQuery);
> }
>
> // Get Errors
> catch (Exception e) {
> strError = "Exception error: " + e;
> return false;
> }
>
> return true;
> }
>
> public boolean loadFrom(String strTable, String strColumn) {
> String strQuery = "";
>
> // Build the Query
> strQuery = strQuery + "SELECT " + this.strTable + ".* ";
> strQuery = strQuery + " FROM " + strTable + ", " + this.strTable;
> strQuery = strQuery + " WHERE " + strTable + "." + strColumn;
> strQuery = strQuery + " = " + this.strTable + ".id;";
>
> // Get Results
> try {
> sqlResults = sqlStatement.executeQuery(strQuery);
> }
>
> // Get Errors
> catch (Exception e) {
> strError = "Exception error: " + e;
> return false;
> }
>
> return true;
> }
>
> public boolean next() {
> try { return sqlResults.next(); }
> catch (Exception e) {
> strError = "Exception error: " + e;
> return false;
> }
> }
>
> public boolean save() {
> // Create Varibles
> updates objUpdates = objData.getUpdates();
> Object[] arrKeys = objUpdates.getKeys();
>
> try {
> // Update Record
> for(int iCnt = 0; iCnt < arrKeys.length; iCnt++)
> sqlResults.updateString(arrKeys[iCnt].toString(),
> objUpdates.get(arrKeys[iCnt].toString()));
>
> // Write Changes
> if(objData.getID() > 0)
> sqlResults.updateRow();
> else
> sqlResults.insertRow();
> }
>
> // Update Errors
> catch (Exception e) {
> // Set Error
> strError = "Exception error: " + e;
> return false;
> }
>
> return true;
> }
> // Abstract Functions
> //////////////////////////////////////////////////////
> // These must be implimented since the extended object only know the
> tables.
> public abstract boolean fill();
> }
>
> --- DATA.MANAGER ---
> package jPublish.Data;
> import java.sql.*;
>
> public abstract class manager extends Object {
> // Data Members
> ////////////////////////////////////////////////////////////
> protected data objData;
> protected String strError = new String();
>
> // SQL Options
> private String strTable = new String();
> private String strWhere = new String();
>
> // Data SQL Connection
> protected Connection sqlConnection;
> protected Statement sqlStatement;
> protected ResultSet sqlResults;
>
> // Constructors
> ////////////////////////////////////////////////////////////
> manager() {
> System.out.println("jPublish.Data.manager()");
>
> try {
> Class.forName("com.mysql.jdbc.Driver").newInstance();
>
> sqlConnection = DriverManager.getConnection(
> "jdbc:mysql://localhost/jPublish", "root", "");
> sqlStatement = sqlConnection.createStatement(
> ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_UPDATABLE);
> }
>
> catch (Exception e) {
> strError = "Execption error: " + e;
> }
> }
>
> // Properties
> //////////////////////////////////////////////////////////////
> public boolean setTable(String strNew) {
> if((strNew instanceof String) && (strNew.length() > 0)) {
> strTable = strNew;
> return true;
> } else
> return false;
> }
>
> public boolean setWhere(String strNew) {
> if((strNew instanceof String) && (strNew.length() > 0)) {
> if(strWhere.length() > 0)
> strWhere += " AND " + strNew;
> else
> strWhere = strNew;
>
> return true;
> } else
> return false;
> }
>
> public data getData() { return objData; }
> public String getError() { return strError; }
>
> public String getTable() { return strTable; }
> public String getWhere() { return strWhere; }
> public int getCount() {
> int iCurr = -1;
> int iLast = -1;
>
> try {
> iCurr = sqlResults.getRow();
> sqlResults.last();
> iLast = sqlResults.getRow();
> sqlResults.absolute(iCurr);
> }
> catch (Exception e) { strError = "Exception Error: " + e; }
>
> return iLast;
> }
>
> // Methods
> /////////////////////////////////////////////////////////////////
> public boolean load() {
> String strQuery = "";
>
> System.out.println("jPublish.Data.manager.load()");
>
> // Build the Query
> strQuery = strQuery + "SELECT * ";
> strQuery = strQuery + " FROM " + strTable;
> if(strWhere.length() > 0)
> strQuery = strQuery + " WHERE " + strWhere;
>
> // Get Results
> try {
> sqlResults = sqlStatement.executeQuery(strQuery);
> }
>
> // Get Errors
> catch (Exception e) {
> strError = "Exception error: " + e;
> return false;
> }
>
> return true;
> }
>
> public boolean loadFrom(String strTable, String strColumn) {
> String strQuery = "";
>
> // Build the Query
> strQuery = strQuery + "SELECT " + this.strTable + ".* ";
> strQuery = strQuery + " FROM " + strTable + ", " + this.strTable;
> strQuery = strQuery + " WHERE " + strTable + "." + strColumn;
> strQuery = strQuery + " = " + this.strTable + ".id;";
>
> // Get Results
> try {
> sqlResults = sqlStatement.executeQuery(strQuery);
> }
>
> // Get Errors
> catch (Exception e) {
> strError = "Exception error: " + e;
> return false;
> }
>
> return true;
> }
>
> public boolean next() {
> try { return sqlResults.next(); }
> catch (Exception e) {
> strError = "Exception error: " + e;
> return false;
> }
> }
>
> public boolean save() {
> // Create Varibles
> updates objUpdates = objData.getUpdates();
> Object[] arrKeys = objUpdates.getKeys();
>
> try {
> // Update Record
> for(int iCnt = 0; iCnt < arrKeys.length; iCnt++)
> sqlResults.updateString(arrKeys[iCnt].toString(),
> objUpdates.get(arrKeys[iCnt].toString()));
>
> // Write Changes
> if(objData.getID() > 0)
> sqlResults.updateRow();
> else
> sqlResults.insertRow();
> }
>
> // Update Errors
> catch (Exception e) {
> // Set Error
> strError = "Exception error: " + e;
> return false;
> }
>
> return true;
> }
> // Abstract Functions
> //////////////////////////////////////////////////////
> // These must be implimented since the extended object only know the
> tables.
> public abstract boolean fill();
> }
>
> --- DATA.DATA ---
> package jPublish.Data;
>
> public abstract class data extends Object {
> // Data Menebers
> ///////////////////////////////////////////////////////////
> protected manager objManager;
>
> // Update Tracking
> protected updates objUpdates;
>
> // Data
> protected long lID;
>
> // Constructors
> ////////////////////////////////////////////////////////////
> data () {
> objUpdates = new updates();
> }
>
> // Properties
> //////////////////////////////////////////////////////////////
> public boolean setManager(manager manNew) {
> if(manNew != null) {
> objManager = manNew;
> return true;
> }
>
> return false;
> }
>
> public boolean setLoaded() { return objUpdates.setUpdated(); }
>
> public manager getManager() { return objManager; }
> public updates getUpdates() { return objUpdates; }
>
> // Data Properties
> public boolean setID(long lNew) {
> if(lNew > 0) {
> lID = lNew;
> objUpdates.set("id", Long.toString(lNew));
> return true;
> }
>
> return false;
> }
>
> public long getID() { return lID; }
> }
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: tomcat-user-unsubscribe@jakarta.apache.org
> For additional commands, e-mail: tomcat-user-help@jakarta.apache.org
>
>
>
>
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: tomcat-user-unsubscribe@jakarta.apache.org
> For additional commands, e-mail: tomcat-user-help@jakarta.apache.org
>
Re: Custom Tag Lib
Posted by Jon Wingfield <jo...@mkodo.com>.
Yikes, calling release() in doStartTag() stops any state being
accessible to child (body) tags. That would kill our custom iterator tags.
You could have your tags implement the TryCatchFinally interface,
instead. That way you'll have a chance to reset state before reuse:
http://jakarta.apache.org/taglibs/guidelines.html
I've seen posts on this list saying that tag pooling has either made
their site a dog or has given a huge positive performance gain. For our
site, which has many tags per page, it is the latter case :) If you're
thinking about turning pooling off you'll need to test the effects on
performance.
Jon
PS We had to go through this process on the upgrade. I share your pain
Mike Cherichetti (Renegade Internet) wrote:
> Shawn,
>
> I ran into this problem as well when switching from 4.0 to 4.1. I think it
> has something to do with 4.1 pooling and re-using tag objects. What I did
> in all of my doStartTag(), doAfterBody(), etc... methods was manually call
> release() to reset the data in the tags like so:
>
> public int doStartTag() throws JspException
> {
> try
> {
> ...
> }
>
> catch (Exception exception)
> {
> throw new JspException(exception);
> }
>
> finally
> {
> release();
> }
>
> return SKIP_BODY;
> }
>
> Have a nice day ...
>
> Sincerely,
>
> Mike Cherichetti
> Renegade Internet
> Internet Advertising Delivery Solutions
> www.renegadeinternet.com
> Phone (724) 658-6346
> Fax (724) 658-6346
>
>
> -----Original Message-----
> From: Shawn Zernik [mailto:szernik@internetworkconsulting.net]
> Sent: Thursday, August 07, 2003 10:56 PM
> To: tomcat-user@jakarta.apache.org
> Subject: Custom Tag Lib
>
>
> Tomcat Users:
>
> I've been fighting with some version differences in tom cat wondering why my
> app acts severly different on Tomcat 4.1.27 then 4.0.6. It appears that
> 4.1.27 is not working from my perspective, and have been fighting with it
> since monday. None of the books I have touch this subject or ellude to the
> problem, and I've seached high and low for solutions.
>
> I'm having a problem working with my custom tag library. The stange part to
> this is it appears to work on tomcat 4.0.6 but not on 4.1.27. The library
> has a tage called site that extends a base tag, and those tags use other
> classes in my data namespace to hit a database.
>
> The tags are returning the proper data in both versions, but in 4.1.27, I
> have to "reload" the contect in the manager for it to "register" the changes
> from the database. I have added some printlns to std out to track what's
> going on. In tomcat 4.0.6 they are going through all the code as I would
> exspect it to. I have included each of the class files that are called. I
> have also included the printouts from both versions of tomcat to clierify
> how each version is handling the calls.
>
> The object hiarchey goes as follows:
>
> jPublish.Tags site extends inc_tag.
> jPublish.Data.site_manager extends jPublish.Data.manager, managers contain,
> load, and fill datas.
> jPublish.Data.site_data extends jPublish.Data.data, used for storing data
> and tracking updates.
>
>
> --- INDEX.JSP ---
> <%@ page contentType="text/html" %>
> <%@ taglib prefix="inc" uri="inc" %>
> <inc:site site="1" action="none"/>
> <html>
> <head><title><inc:site action="title" /></title></head>
>
> <body>
> <h1>Welcome to <inc:site action="title"/>!</h1>
> © <inc:site action="copyright"/>
> </body>
> </html>
>
> --- TOMCAT 4.0.6 STDOUT ---
> Starting service Tomcat-Standalone
> Apache Tomcat/4.0.6
> Starting service Tomcat-Apache
> Apache Tomcat/4.0.6
> jPublish.Data.manager()
> jPublish.Tags.site()
> jPublish.Tags.site.setSite()
> jPublish.Data.manager()
> jPublish.Tags.site.doEndTag(): Begin
> jPublish.Tags.site.doEndTag(): End
> jPublish.Data.manager()
> jPublish.Tags.site()
> jPublish.Tags.site.doEndTag(): Begin
> jPublish.Tags.inc_tag.loaded()
> jPublish.Tags.inc_tag.loaded(): not instance
> jPublish.Data.manager.load()
> jPublish.Tags.inc_tag.loaded(): load ok
> jPublish.Tags.inc_tag.loaded(): next ok
> jPublish.Tags.inc_tag.loaded(): reached fill.
> jPublish.Tags.site.loaded()
> Internetwork Consulting
> jPublish.Tags.site.doEndTag(): End
> jPublish.Data.manager()
> jPublish.Tags.site()
> jPublish.Tags.site.doEndTag(): Begin
> jPublish.Tags.inc_tag.loaded()
> jPublish.Tags.inc_tag.loaded(): not instance
> jPublish.Data.manager.load()
> jPublish.Tags.inc_tag.loaded(): load ok
> jPublish.Tags.inc_tag.loaded(): next ok
> jPublish.Tags.inc_tag.loaded(): reached fill.
> jPublish.Tags.site.loaded()
> Internetwork Consulting
> jPublish.Tags.site.doEndTag(): End
> jPublish.Data.manager()
> jPublish.Tags.site()
> jPublish.Tags.site.doEndTag(): Begin
> jPublish.Tags.inc_tag.loaded()
> jPublish.Tags.inc_tag.loaded(): not instance
> jPublish.Data.manager.load()
> jPublish.Tags.inc_tag.loaded(): load ok
> jPublish.Tags.inc_tag.loaded(): next ok
> jPublish.Tags.inc_tag.loaded(): reached fill.
> jPublish.Tags.site.loaded()
> Shawn
> jPublish.Tags.site.doEndTag(): End
>
> jPublish.Data.manager()
> jPublish.Tags.site()
> jPublish.Tags.site.setSite()
> jPublish.Data.manager()
> jPublish.Tags.site.doEndTag(): Begin
> jPublish.Tags.site.doEndTag(): End
> jPublish.Data.manager()
> jPublish.Tags.site()
> jPublish.Tags.site.doEndTag(): Begin
> jPublish.Tags.inc_tag.loaded()
> jPublish.Tags.inc_tag.loaded(): not instance
> jPublish.Data.manager.load()
> jPublish.Tags.inc_tag.loaded(): load ok
> jPublish.Tags.inc_tag.loaded(): next ok
> jPublish.Tags.inc_tag.loaded(): reached fill.
> jPublish.Tags.site.loaded()
> Internetwork Consulting
> jPublish.Tags.site.doEndTag(): End
> jPublish.Data.manager()
> jPublish.Tags.site()
> jPublish.Tags.site.doEndTag(): Begin
> jPublish.Tags.inc_tag.loaded()
> jPublish.Tags.inc_tag.loaded(): not instance
> jPublish.Data.manager.load()
> jPublish.Tags.inc_tag.loaded(): load ok
> jPublish.Tags.inc_tag.loaded(): next ok
> jPublish.Tags.inc_tag.loaded(): reached fill.
> jPublish.Tags.site.loaded()
> Internetwork Consulting
> jPublish.Tags.site.doEndTag(): End
> jPublish.Data.manager()
> jPublish.Tags.site()
> jPublish.Tags.site.doEndTag(): Begin
> jPublish.Tags.inc_tag.loaded()
> jPublish.Tags.inc_tag.loaded(): not instance
> jPublish.Data.manager.load()
> jPublish.Tags.inc_tag.loaded(): load ok
> jPublish.Tags.inc_tag.loaded(): next ok
> jPublish.Tags.inc_tag.loaded(): reached fill.
> jPublish.Tags.site.loaded()
> INC
> jPublish.Tags.site.doEndTag(): End
>
> --- TOMCAT 4.1.27 STDOUT: db INC then Shawn ---
> jPublish.Data.manager()
> jPublish.Tags.site()
> jPublish.Tags.site.setSite()
> jPublish.Data.manager()
> jPublish.Tags.site.doEndTag(): Begin
> jPublish.Tags.site.doEndTag(): End
> jPublish.Data.manager()
> jPublish.Tags.site()
> jPublish.Tags.site.doEndTag(): Begin
> jPublish.Tags.inc_tag.loaded()
> jPublish.Tags.inc_tag.loaded(): not instance
> jPublish.Data.manager.load()
> jPublish.Tags.inc_tag.loaded(): load ok
> jPublish.Tags.inc_tag.loaded(): next ok
> jPublish.Tags.inc_tag.loaded(): reached fill.
> jPublish.Tags.site.loaded()
> Internetwork Consulting
> jPublish.Tags.site.doEndTag(): End
> jPublish.Tags.site.doEndTag(): Begin
> jPublish.Tags.inc_tag.loaded()
> jPublish.Tags.site.loaded()
> Internetwork Consulting
> jPublish.Tags.site.doEndTag(): End
> jPublish.Tags.site.doEndTag(): Begin
> jPublish.Tags.inc_tag.loaded()
> jPublish.Tags.site.loaded()
> INC
> jPublish.Tags.site.doEndTag(): End
>
> <Change INC to Shawn in DB>
> jPublish.Tags.site.setSite()
> jPublish.Data.manager()
> jPublish.Tags.site.doEndTag(): Begin
> jPublish.Tags.site.doEndTag(): End
> jPublish.Tags.site.doEndTag(): Begin
> jPublish.Tags.inc_tag.loaded()
> jPublish.Tags.site.loaded()
> Internetwork Consulting
> jPublish.Tags.site.doEndTag(): End
> jPublish.Tags.site.doEndTag(): Begin
> jPublish.Tags.inc_tag.loaded()
> jPublish.Tags.site.loaded()
> Internetwork Consulting
> jPublish.Tags.site.doEndTag(): End
> jPublish.Tags.site.doEndTag(): Begin
> jPublish.Tags.inc_tag.loaded()
> jPublish.Tags.site.loaded()
> INC
> jPublish.Tags.site.doEndTag(): End
>
> --- SITE TAG "inc:site" ---
> package jPublish.Tags;
>
> import jPublish.Data.*;
>
> public class site extends inc_tag {
> private site_data objSite;
>
> // Constructors
> ////////////////////////////////////////////////////////////
> public site() {
> objManager = (manager) new site_manager();
> System.out.println("jPublish.Tags.site()");
> }
>
> // Properties
> //////////////////////////////////////////////////////////////
> public void setSite(String strNew) {
> System.out.println("jPublish.Tags.site.setSite()");
> objManager = (manager) new site_manager();
> objManager.setWhere("id = " + strNew);
> }
>
> // Methods
> /////////////////////////////////////////////////////////////////
> protected boolean loaded() {
> if(super.loaded()) {
> objSite = (site_data) objData;
> System.out.println("jPublish.Tags.site.loaded()");
> return true;
> } else
> return false;
> }
>
> public int doEndTag() {
> System.out.println("jPublish.Tags.site.doEndTag(): Begin");
>
> if(strAction.equalsIgnoreCase("id"))
> if(loaded()) print(Long.toString(objSite.getID()));
>
> if(strAction.equalsIgnoreCase("design"))
> if(loaded()) print(Long.toString(objSite.getDesign()));
>
> if(strAction.equalsIgnoreCase("title"))
> if(loaded()) print(objSite.getTitle());
>
> if(strAction.equalsIgnoreCase("webmaster"))
> if(loaded()) print(objSite.getWebmaster());
>
> if(strAction.equalsIgnoreCase("email"))
> if(loaded()) print(objSite.getEmail());
>
> if(strAction.equalsIgnoreCase("copyright"))
> if(loaded()) print(objSite.getCopyright());
>
> if(strAction.equalsIgnoreCase("logo"))
> if(loaded()) print(objSite.getLogo());
>
> if(strAction.equalsIgnoreCase("next"))
> if(objManager.next()) return this.EVAL_BODY_AGAIN;
>
> System.out.println("jPublish.Tags.site.doEndTag(): End");
>
> return this.SKIP_BODY;
> }
> }
>
> --- INC_TAG ---
> package jPublish.Tags;
>
> import jPublish.Data.*;
> import javax.servlet.*;
> import javax.servlet.jsp.*;
> import javax.servlet.jsp.tagext.*;
>
> public abstract class inc_tag extends TagSupport {
> // Data Menebers
> ///////////////////////////////////////////////////////////
> protected manager objManager;
> protected data objData;
> protected String strWhere;
>
> // Action Data
> protected String strAction = "none";
> private String strOutput = "none";
>
> // Properties
> //////////////////////////////////////////////////////////////
> public void setAction(String strNew) { strAction = strNew; }
> public void setOutput(String strNew) { strOutput = strNew; }
> public manager getManager() { return objManager; }
>
> // Internal Methods
> ////////////////////////////////////////////////////////
> protected boolean loaded() {
> System.out.println("jPublish.Tags.inc_tag.loaded()");
> if(!(objData instanceof data)) {
> System.out.println("jPublish.Tags.inc_tag.loaded(): not instance");
> if(objManager.load()) {
> System.out.println("jPublish.Tags.inc_tag.loaded(): load ok");
> if(objManager.next()) {
> System.out.println("jPublish.Tags.inc_tag.loaded(): next ok");
> if(objManager.fill()) {
> System.out.println("jPublish.Tags.inc_tag.loaded(): reached fill.");
> objData = objManager.getData();
> return true;
> } else
> return false;
> }
> } else
> return false;
> }
>
> // Data Exist: Loaded
> return true;
> }
>
> protected void print(String strOut) {
> JspWriter out = pageContext.getOut();
>
> System.out.println(strOut);
> try { out.print(format(strOut)); }
> catch (Exception e) { System.out.println("Exception error: " + e); }
> }
>
> protected String format(String strIn) {
> String strTemp = new String();
> char cTemp;
>
> // String Safe
> if(strOutput.equalsIgnoreCase("stringsafe")) {
> for(int iCnt = 0; iCnt < strIn.length(); iCnt++) {
> cTemp = strIn.charAt(iCnt);
> switch(cTemp) {
> case '\'':
> strTemp += "\\\'";
> break;
> case '\"':
> strTemp += "\\\"";
> break;
> case '\\':
> strTemp += "\\\\";
> break;
> default:
> strTemp += cTemp;
> break;
> }
> }
> return strTemp;
> }
>
> // Strip String
> if(strOutput.equalsIgnoreCase("stringsafe")) {
> for(int iCnt = 0; iCnt < strIn.length(); iCnt++) {
> cTemp = strIn.charAt(iCnt);
> switch(cTemp) {
> case '\'':
> break;
> case '\"':
> break;
> default:
> strTemp += cTemp;
> break;
> }
> }
> return strTemp;
> }
>
> // HTML Safe
> if(strOutput.equalsIgnoreCase("htmlsafe")) {
> for(int iCnt = 0; iCnt < strIn.length(); iCnt++) {
> cTemp = strIn.charAt(iCnt);
> switch(cTemp) {
> case '<':
> strTemp += "<";
> break;
> case '>':
> strTemp += ">";
> break;
> default:
> strTemp += cTemp;
> break;
> }
> }
> return strTemp;
> }
>
> // None
> return strIn;
> }
> }
>
> --- DATA.SITE_MANAGER ---
> package jPublish.Data;
>
> public class site_manager extends manager {
> // Constructors
> ////////////////////////////////////////////////////////////
> public site_manager() {
> super();
> super.setTable("sites");
> }
>
> // Methods
> /////////////////////////////////////////////////////////////////
> public boolean fill() {
> site_data dataNew = new site_data();
>
> try {
> dataNew.setID(sqlResults.getLong("id"));
> dataNew.setDesign(sqlResults.getLong("design"));
> dataNew.setTitle(sqlResults.getString("title"));
> dataNew.setWebmaster(sqlResults.getString("webmaster"));
> dataNew.setEmail(sqlResults.getString("email"));
> dataNew.setCopyright(sqlResults.getString("copyright"));
> dataNew.setLogo(sqlResults.getString("logo"));
>
> dataNew.setManager((manager) this);
> dataNew.setLoaded();
> objData = (data) dataNew;
> return true;
> }
>
> catch (Exception e) {
> strError = "Exception error: " + e;
> }
>
> return false;
> }
> }
>
> --- DATA.SITE_DATA ---
> package jPublish.Data;
>
> public class site_data extends data {
> // Data Menebers
> ///////////////////////////////////////////////////////////
> private long lDesign;
> private String strTitle;
> private String strWebmaster;
> private String strEmail;
> private String strCopyright;
> private String strLogo;
> // Child Relationships
> private section_manager objSections;
> // Parent Relationships
> private design_manager objDesigns;
>
> // Constructors
> ////////////////////////////////////////////////////////////
> public site_data() { super(); }
>
> // Properties
> //////////////////////////////////////////////////////////////
> public boolean setDesign(long lNew) {
> if(lNew > 0) {
> lDesign = lNew;
> objUpdates.set("design", Long.toString(lNew));
> return true;
> }
>
> return false;
> }
>
> public boolean setTitle(String strNew) {
> if(strNew.length() > 0) {
> strTitle = strNew;
> objUpdates.set("title", strNew);
> return true;
> }
>
> return false;
> }
>
> public boolean setWebmaster(String strNew) {
> if(strNew.length() > 0) {
> strWebmaster = strNew;
> objUpdates.set("webmaster", strNew);
> return true;
> }
>
> return false;
> }
>
> public boolean setEmail(String strNew) {
> if(strNew.length() > 0) {
> strEmail = strNew;
> objUpdates.set("email", strNew);
> return true;
> }
>
> return false;
> }
>
> public boolean setCopyright(String strNew) {
> if(strNew.length() > 0) {
> strCopyright = strNew;
> objUpdates.set("copyright", strNew);
> return true;
> }
>
> return false;
> }
>
> public boolean setLogo(String strNew) {
> if(strNew.length() > 0) {
> strLogo = strNew;
> objUpdates.set("logo", strNew);
> return true;
> }
>
> return false;
> }
>
> public long getDesign() { return lDesign; }
> public String getTitle() { return strTitle; }
> public String getWebmaster() { return strWebmaster; }
> public String getEmail() { return strEmail; }
> public String getCopyright() { return strCopyright; }
> public String getLogo() { return strLogo; }
>
> // Child Relationships
> public section_manager getSections() {
> if(!(objSections instanceof section_manager)) {
> objSections = new section_manager();
> objSections.setWhere("site = " + this.getID());
> objSections.load();
> }
> return objSections;
> }
>
> // Parent Relationships
> public design_manager getParentDesign() {
> if(!(objDesigns instanceof design_manager)) {
> objDesigns = new design_manager();
> objDesigns.setWhere("site = " + this.getDesign());
> objDesigns.load();
> }
> return objDesigns;
> }
> }
>
> --- DATA.MANAGER ---
> package jPublish.Data;
> import java.sql.*;
>
> public abstract class manager extends Object {
> // Data Members
> ////////////////////////////////////////////////////////////
> protected data objData;
> protected String strError = new String();
>
> // SQL Options
> private String strTable = new String();
> private String strWhere = new String();
>
> // Data SQL Connection
> protected Connection sqlConnection;
> protected Statement sqlStatement;
> protected ResultSet sqlResults;
>
> // Constructors
> ////////////////////////////////////////////////////////////
> manager() {
> System.out.println("jPublish.Data.manager()");
>
> try {
> Class.forName("com.mysql.jdbc.Driver").newInstance();
>
> sqlConnection = DriverManager.getConnection(
> "jdbc:mysql://localhost/jPublish", "root", "");
> sqlStatement = sqlConnection.createStatement(
> ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_UPDATABLE);
> }
>
> catch (Exception e) {
> strError = "Execption error: " + e;
> }
> }
>
> // Properties
> //////////////////////////////////////////////////////////////
> public boolean setTable(String strNew) {
> if((strNew instanceof String) && (strNew.length() > 0)) {
> strTable = strNew;
> return true;
> } else
> return false;
> }
>
> public boolean setWhere(String strNew) {
> if((strNew instanceof String) && (strNew.length() > 0)) {
> if(strWhere.length() > 0)
> strWhere += " AND " + strNew;
> else
> strWhere = strNew;
>
> return true;
> } else
> return false;
> }
>
> public data getData() { return objData; }
> public String getError() { return strError; }
>
> public String getTable() { return strTable; }
> public String getWhere() { return strWhere; }
> public int getCount() {
> int iCurr = -1;
> int iLast = -1;
>
> try {
> iCurr = sqlResults.getRow();
> sqlResults.last();
> iLast = sqlResults.getRow();
> sqlResults.absolute(iCurr);
> }
> catch (Exception e) { strError = "Exception Error: " + e; }
>
> return iLast;
> }
>
> // Methods
> /////////////////////////////////////////////////////////////////
> public boolean load() {
> String strQuery = "";
>
> System.out.println("jPublish.Data.manager.load()");
>
> // Build the Query
> strQuery = strQuery + "SELECT * ";
> strQuery = strQuery + " FROM " + strTable;
> if(strWhere.length() > 0)
> strQuery = strQuery + " WHERE " + strWhere;
>
> // Get Results
> try {
> sqlResults = sqlStatement.executeQuery(strQuery);
> }
>
> // Get Errors
> catch (Exception e) {
> strError = "Exception error: " + e;
> return false;
> }
>
> return true;
> }
>
> public boolean loadFrom(String strTable, String strColumn) {
> String strQuery = "";
>
> // Build the Query
> strQuery = strQuery + "SELECT " + this.strTable + ".* ";
> strQuery = strQuery + " FROM " + strTable + ", " + this.strTable;
> strQuery = strQuery + " WHERE " + strTable + "." + strColumn;
> strQuery = strQuery + " = " + this.strTable + ".id;";
>
> // Get Results
> try {
> sqlResults = sqlStatement.executeQuery(strQuery);
> }
>
> // Get Errors
> catch (Exception e) {
> strError = "Exception error: " + e;
> return false;
> }
>
> return true;
> }
>
> public boolean next() {
> try { return sqlResults.next(); }
> catch (Exception e) {
> strError = "Exception error: " + e;
> return false;
> }
> }
>
> public boolean save() {
> // Create Varibles
> updates objUpdates = objData.getUpdates();
> Object[] arrKeys = objUpdates.getKeys();
>
> try {
> // Update Record
> for(int iCnt = 0; iCnt < arrKeys.length; iCnt++)
> sqlResults.updateString(arrKeys[iCnt].toString(),
> objUpdates.get(arrKeys[iCnt].toString()));
>
> // Write Changes
> if(objData.getID() > 0)
> sqlResults.updateRow();
> else
> sqlResults.insertRow();
> }
>
> // Update Errors
> catch (Exception e) {
> // Set Error
> strError = "Exception error: " + e;
> return false;
> }
>
> return true;
> }
> // Abstract Functions
> //////////////////////////////////////////////////////
> // These must be implimented since the extended object only know the
> tables.
> public abstract boolean fill();
> }
>
> --- DATA.MANAGER ---
> package jPublish.Data;
> import java.sql.*;
>
> public abstract class manager extends Object {
> // Data Members
> ////////////////////////////////////////////////////////////
> protected data objData;
> protected String strError = new String();
>
> // SQL Options
> private String strTable = new String();
> private String strWhere = new String();
>
> // Data SQL Connection
> protected Connection sqlConnection;
> protected Statement sqlStatement;
> protected ResultSet sqlResults;
>
> // Constructors
> ////////////////////////////////////////////////////////////
> manager() {
> System.out.println("jPublish.Data.manager()");
>
> try {
> Class.forName("com.mysql.jdbc.Driver").newInstance();
>
> sqlConnection = DriverManager.getConnection(
> "jdbc:mysql://localhost/jPublish", "root", "");
> sqlStatement = sqlConnection.createStatement(
> ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_UPDATABLE);
> }
>
> catch (Exception e) {
> strError = "Execption error: " + e;
> }
> }
>
> // Properties
> //////////////////////////////////////////////////////////////
> public boolean setTable(String strNew) {
> if((strNew instanceof String) && (strNew.length() > 0)) {
> strTable = strNew;
> return true;
> } else
> return false;
> }
>
> public boolean setWhere(String strNew) {
> if((strNew instanceof String) && (strNew.length() > 0)) {
> if(strWhere.length() > 0)
> strWhere += " AND " + strNew;
> else
> strWhere = strNew;
>
> return true;
> } else
> return false;
> }
>
> public data getData() { return objData; }
> public String getError() { return strError; }
>
> public String getTable() { return strTable; }
> public String getWhere() { return strWhere; }
> public int getCount() {
> int iCurr = -1;
> int iLast = -1;
>
> try {
> iCurr = sqlResults.getRow();
> sqlResults.last();
> iLast = sqlResults.getRow();
> sqlResults.absolute(iCurr);
> }
> catch (Exception e) { strError = "Exception Error: " + e; }
>
> return iLast;
> }
>
> // Methods
> /////////////////////////////////////////////////////////////////
> public boolean load() {
> String strQuery = "";
>
> System.out.println("jPublish.Data.manager.load()");
>
> // Build the Query
> strQuery = strQuery + "SELECT * ";
> strQuery = strQuery + " FROM " + strTable;
> if(strWhere.length() > 0)
> strQuery = strQuery + " WHERE " + strWhere;
>
> // Get Results
> try {
> sqlResults = sqlStatement.executeQuery(strQuery);
> }
>
> // Get Errors
> catch (Exception e) {
> strError = "Exception error: " + e;
> return false;
> }
>
> return true;
> }
>
> public boolean loadFrom(String strTable, String strColumn) {
> String strQuery = "";
>
> // Build the Query
> strQuery = strQuery + "SELECT " + this.strTable + ".* ";
> strQuery = strQuery + " FROM " + strTable + ", " + this.strTable;
> strQuery = strQuery + " WHERE " + strTable + "." + strColumn;
> strQuery = strQuery + " = " + this.strTable + ".id;";
>
> // Get Results
> try {
> sqlResults = sqlStatement.executeQuery(strQuery);
> }
>
> // Get Errors
> catch (Exception e) {
> strError = "Exception error: " + e;
> return false;
> }
>
> return true;
> }
>
> public boolean next() {
> try { return sqlResults.next(); }
> catch (Exception e) {
> strError = "Exception error: " + e;
> return false;
> }
> }
>
> public boolean save() {
> // Create Varibles
> updates objUpdates = objData.getUpdates();
> Object[] arrKeys = objUpdates.getKeys();
>
> try {
> // Update Record
> for(int iCnt = 0; iCnt < arrKeys.length; iCnt++)
> sqlResults.updateString(arrKeys[iCnt].toString(),
> objUpdates.get(arrKeys[iCnt].toString()));
>
> // Write Changes
> if(objData.getID() > 0)
> sqlResults.updateRow();
> else
> sqlResults.insertRow();
> }
>
> // Update Errors
> catch (Exception e) {
> // Set Error
> strError = "Exception error: " + e;
> return false;
> }
>
> return true;
> }
> // Abstract Functions
> //////////////////////////////////////////////////////
> // These must be implimented since the extended object only know the
> tables.
> public abstract boolean fill();
> }
>
> --- DATA.DATA ---
> package jPublish.Data;
>
> public abstract class data extends Object {
> // Data Menebers
> ///////////////////////////////////////////////////////////
> protected manager objManager;
>
> // Update Tracking
> protected updates objUpdates;
>
> // Data
> protected long lID;
>
> // Constructors
> ////////////////////////////////////////////////////////////
> data () {
> objUpdates = new updates();
> }
>
> // Properties
> //////////////////////////////////////////////////////////////
> public boolean setManager(manager manNew) {
> if(manNew != null) {
> objManager = manNew;
> return true;
> }
>
> return false;
> }
>
> public boolean setLoaded() { return objUpdates.setUpdated(); }
>
> public manager getManager() { return objManager; }
> public updates getUpdates() { return objUpdates; }
>
> // Data Properties
> public boolean setID(long lNew) {
> if(lNew > 0) {
> lID = lNew;
> objUpdates.set("id", Long.toString(lNew));
> return true;
> }
>
> return false;
> }
>
> public long getID() { return lID; }
> }
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: tomcat-user-unsubscribe@jakarta.apache.org
> For additional commands, e-mail: tomcat-user-help@jakarta.apache.org
>
>
>
>
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: tomcat-user-unsubscribe@jakarta.apache.org
> For additional commands, e-mail: tomcat-user-help@jakarta.apache.org
>
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Re: Custom Tag Lib
Posted by Tim Funk <fu...@joedog.org>.
SimpleTag is part of JSP2.0 which is in tomcat5. AFAIK, there is no simpletag
for jsp1.2 (tomcat4)
More info on tag pooling:
http://jakarta.apache.org/tomcat/faq/misc.html#tagpool
http://jakarta.apache.org/tomcat/faq/misc.html#tagbroken
-Tim
Shawn Zernik wrote:
> Mike:
>
> I can't resolve that problem. can I impliment those tags as simple tags:
> the JSP spec says that they will not be cached or reused.
>
> Shawn
>
Re: Custom Tag Lib
Posted by Tim Funk <fu...@joedog.org>.
SimpleTag is part of JSP2.0 which is in tomcat5. AFAIK, there is no simpletag
for jsp1.2 (tomcat4)
More info on tag pooling:
http://jakarta.apache.org/tomcat/faq/misc.html#tagpool
http://jakarta.apache.org/tomcat/faq/misc.html#tagbroken
-Tim
Shawn Zernik wrote:
> Mike:
>
> I can't resolve that problem. can I impliment those tags as simple tags:
> the JSP spec says that they will not be cached or reused.
>
> Shawn
>
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RE: Custom Tag Lib
Posted by Shawn Zernik <sz...@internetworkconsulting.net>.
Mike:
I can't resolve that problem. can I impliment those tags as simple tags:
the JSP spec says that they will not be cached or reused.
Shawn
-----Original Message-----
From: Mike Cherichetti (Renegade Internet)
[mailto:mike@renegadeinternet.com]
Sent: Thursday, August 07, 2003 10:59 PM
To: Tomcat Users List
Subject: RE: Custom Tag Lib
Hi Shawn,
Actually, I wasn't aware that there was an option to disable it. When I
figured out what was happening, I went ahead and handled it in my code. No
telling how other application servers might handle it. If you're only going
to be deploying on Tomcat, disabling pooling would probably save you some
time, but you still might want to handle it in your code to get better
performance.
Mike
-----Original Message-----
From: Shawn Zernik [mailto:szernik@internetworkconsulting.net]
Sent: Thursday, August 07, 2003 11:41 PM
To: Tomcat Users List; mike@renegadeinternet.com
Subject: RE: Custom Tag Lib
Mike:
Thanks sooooo very much... I saw their is a config option in the Jasper to
turn off tag pooling. do you thing that would work too, of shouldI
impliment it in my source code. I'm gonna take a look at it right now.
Shawn
-----Original Message-----
From: Mike Cherichetti (Renegade Internet)
[mailto:mike@renegadeinternet.com]
Sent: Thursday, August 07, 2003 10:28 PM
To: Tomcat Users List
Subject: RE: Custom Tag Lib
Shawn,
I ran into this problem as well when switching from 4.0 to 4.1. I think it
has something to do with 4.1 pooling and re-using tag objects. What I did
in all of my doStartTag(), doAfterBody(), etc... methods was manually call
release() to reset the data in the tags like so:
public int doStartTag() throws JspException
{
try
{
...
}
catch (Exception exception)
{
throw new JspException(exception);
}
finally
{
release();
}
return SKIP_BODY;
}
Have a nice day ...
Sincerely,
Mike Cherichetti
Renegade Internet
Internet Advertising Delivery Solutions
www.renegadeinternet.com
Phone (724) 658-6346
Fax (724) 658-6346
-----Original Message-----
From: Shawn Zernik [mailto:szernik@internetworkconsulting.net]
Sent: Thursday, August 07, 2003 10:56 PM
To: tomcat-user@jakarta.apache.org
Subject: Custom Tag Lib
Tomcat Users:
I've been fighting with some version differences in tom cat wondering why my
app acts severly different on Tomcat 4.1.27 then 4.0.6. It appears that
4.1.27 is not working from my perspective, and have been fighting with it
since monday. None of the books I have touch this subject or ellude to the
problem, and I've seached high and low for solutions.
I'm having a problem working with my custom tag library. The stange part to
this is it appears to work on tomcat 4.0.6 but not on 4.1.27. The library
has a tage called site that extends a base tag, and those tags use other
classes in my data namespace to hit a database.
The tags are returning the proper data in both versions, but in 4.1.27, I
have to "reload" the contect in the manager for it to "register" the changes
from the database. I have added some printlns to std out to track what's
going on. In tomcat 4.0.6 they are going through all the code as I would
exspect it to. I have included each of the class files that are called. I
have also included the printouts from both versions of tomcat to clierify
how each version is handling the calls.
The object hiarchey goes as follows:
jPublish.Tags site extends inc_tag.
jPublish.Data.site_manager extends jPublish.Data.manager, managers contain,
load, and fill datas.
jPublish.Data.site_data extends jPublish.Data.data, used for storing data
and tracking updates.
--- INDEX.JSP ---
<%@ page contentType="text/html" %>
<%@ taglib prefix="inc" uri="inc" %>
<inc:site site="1" action="none"/>
<html>
<head><title><inc:site action="title" /></title></head>
<body>
<h1>Welcome to <inc:site action="title"/>!</h1>
© <inc:site action="copyright"/>
</body>
</html>
--- TOMCAT 4.0.6 STDOUT ---
Starting service Tomcat-Standalone
Apache Tomcat/4.0.6
Starting service Tomcat-Apache
Apache Tomcat/4.0.6
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.setSite()
jPublish.Data.manager()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
Shawn
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.setSite()
jPublish.Data.manager()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
INC
jPublish.Tags.site.doEndTag(): End
--- TOMCAT 4.1.27 STDOUT: db INC then Shawn ---
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.setSite()
jPublish.Data.manager()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.site.loaded()
INC
jPublish.Tags.site.doEndTag(): End
<Change INC to Shawn in DB>
jPublish.Tags.site.setSite()
jPublish.Data.manager()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.site.doEndTag(): End
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.site.loaded()
INC
jPublish.Tags.site.doEndTag(): End
--- SITE TAG "inc:site" ---
package jPublish.Tags;
import jPublish.Data.*;
public class site extends inc_tag {
private site_data objSite;
// Constructors
////////////////////////////////////////////////////////////
public site() {
objManager = (manager) new site_manager();
System.out.println("jPublish.Tags.site()");
}
// Properties
//////////////////////////////////////////////////////////////
public void setSite(String strNew) {
System.out.println("jPublish.Tags.site.setSite()");
objManager = (manager) new site_manager();
objManager.setWhere("id = " + strNew);
}
// Methods
/////////////////////////////////////////////////////////////////
protected boolean loaded() {
if(super.loaded()) {
objSite = (site_data) objData;
System.out.println("jPublish.Tags.site.loaded()");
return true;
} else
return false;
}
public int doEndTag() {
System.out.println("jPublish.Tags.site.doEndTag(): Begin");
if(strAction.equalsIgnoreCase("id"))
if(loaded()) print(Long.toString(objSite.getID()));
if(strAction.equalsIgnoreCase("design"))
if(loaded()) print(Long.toString(objSite.getDesign()));
if(strAction.equalsIgnoreCase("title"))
if(loaded()) print(objSite.getTitle());
if(strAction.equalsIgnoreCase("webmaster"))
if(loaded()) print(objSite.getWebmaster());
if(strAction.equalsIgnoreCase("email"))
if(loaded()) print(objSite.getEmail());
if(strAction.equalsIgnoreCase("copyright"))
if(loaded()) print(objSite.getCopyright());
if(strAction.equalsIgnoreCase("logo"))
if(loaded()) print(objSite.getLogo());
if(strAction.equalsIgnoreCase("next"))
if(objManager.next()) return this.EVAL_BODY_AGAIN;
System.out.println("jPublish.Tags.site.doEndTag(): End");
return this.SKIP_BODY;
}
}
--- INC_TAG ---
package jPublish.Tags;
import jPublish.Data.*;
import javax.servlet.*;
import javax.servlet.jsp.*;
import javax.servlet.jsp.tagext.*;
public abstract class inc_tag extends TagSupport {
// Data Menebers
///////////////////////////////////////////////////////////
protected manager objManager;
protected data objData;
protected String strWhere;
// Action Data
protected String strAction = "none";
private String strOutput = "none";
// Properties
//////////////////////////////////////////////////////////////
public void setAction(String strNew) { strAction = strNew; }
public void setOutput(String strNew) { strOutput = strNew; }
public manager getManager() { return objManager; }
// Internal Methods
////////////////////////////////////////////////////////
protected boolean loaded() {
System.out.println("jPublish.Tags.inc_tag.loaded()");
if(!(objData instanceof data)) {
System.out.println("jPublish.Tags.inc_tag.loaded(): not instance");
if(objManager.load()) {
System.out.println("jPublish.Tags.inc_tag.loaded(): load ok");
if(objManager.next()) {
System.out.println("jPublish.Tags.inc_tag.loaded(): next ok");
if(objManager.fill()) {
System.out.println("jPublish.Tags.inc_tag.loaded(): reached fill.");
objData = objManager.getData();
return true;
} else
return false;
}
} else
return false;
}
// Data Exist: Loaded
return true;
}
protected void print(String strOut) {
JspWriter out = pageContext.getOut();
System.out.println(strOut);
try { out.print(format(strOut)); }
catch (Exception e) { System.out.println("Exception error: " + e); }
}
protected String format(String strIn) {
String strTemp = new String();
char cTemp;
// String Safe
if(strOutput.equalsIgnoreCase("stringsafe")) {
for(int iCnt = 0; iCnt < strIn.length(); iCnt++) {
cTemp = strIn.charAt(iCnt);
switch(cTemp) {
case '\'':
strTemp += "\\\'";
break;
case '\"':
strTemp += "\\\"";
break;
case '\\':
strTemp += "\\\\";
break;
default:
strTemp += cTemp;
break;
}
}
return strTemp;
}
// Strip String
if(strOutput.equalsIgnoreCase("stringsafe")) {
for(int iCnt = 0; iCnt < strIn.length(); iCnt++) {
cTemp = strIn.charAt(iCnt);
switch(cTemp) {
case '\'':
break;
case '\"':
break;
default:
strTemp += cTemp;
break;
}
}
return strTemp;
}
// HTML Safe
if(strOutput.equalsIgnoreCase("htmlsafe")) {
for(int iCnt = 0; iCnt < strIn.length(); iCnt++) {
cTemp = strIn.charAt(iCnt);
switch(cTemp) {
case '<':
strTemp += "<";
break;
case '>':
strTemp += ">";
break;
default:
strTemp += cTemp;
break;
}
}
return strTemp;
}
// None
return strIn;
}
}
--- DATA.SITE_MANAGER ---
package jPublish.Data;
public class site_manager extends manager {
// Constructors
////////////////////////////////////////////////////////////
public site_manager() {
super();
super.setTable("sites");
}
// Methods
/////////////////////////////////////////////////////////////////
public boolean fill() {
site_data dataNew = new site_data();
try {
dataNew.setID(sqlResults.getLong("id"));
dataNew.setDesign(sqlResults.getLong("design"));
dataNew.setTitle(sqlResults.getString("title"));
dataNew.setWebmaster(sqlResults.getString("webmaster"));
dataNew.setEmail(sqlResults.getString("email"));
dataNew.setCopyright(sqlResults.getString("copyright"));
dataNew.setLogo(sqlResults.getString("logo"));
dataNew.setManager((manager) this);
dataNew.setLoaded();
objData = (data) dataNew;
return true;
}
catch (Exception e) {
strError = "Exception error: " + e;
}
return false;
}
}
--- DATA.SITE_DATA ---
package jPublish.Data;
public class site_data extends data {
// Data Menebers
///////////////////////////////////////////////////////////
private long lDesign;
private String strTitle;
private String strWebmaster;
private String strEmail;
private String strCopyright;
private String strLogo;
// Child Relationships
private section_manager objSections;
// Parent Relationships
private design_manager objDesigns;
// Constructors
////////////////////////////////////////////////////////////
public site_data() { super(); }
// Properties
//////////////////////////////////////////////////////////////
public boolean setDesign(long lNew) {
if(lNew > 0) {
lDesign = lNew;
objUpdates.set("design", Long.toString(lNew));
return true;
}
return false;
}
public boolean setTitle(String strNew) {
if(strNew.length() > 0) {
strTitle = strNew;
objUpdates.set("title", strNew);
return true;
}
return false;
}
public boolean setWebmaster(String strNew) {
if(strNew.length() > 0) {
strWebmaster = strNew;
objUpdates.set("webmaster", strNew);
return true;
}
return false;
}
public boolean setEmail(String strNew) {
if(strNew.length() > 0) {
strEmail = strNew;
objUpdates.set("email", strNew);
return true;
}
return false;
}
public boolean setCopyright(String strNew) {
if(strNew.length() > 0) {
strCopyright = strNew;
objUpdates.set("copyright", strNew);
return true;
}
return false;
}
public boolean setLogo(String strNew) {
if(strNew.length() > 0) {
strLogo = strNew;
objUpdates.set("logo", strNew);
return true;
}
return false;
}
public long getDesign() { return lDesign; }
public String getTitle() { return strTitle; }
public String getWebmaster() { return strWebmaster; }
public String getEmail() { return strEmail; }
public String getCopyright() { return strCopyright; }
public String getLogo() { return strLogo; }
// Child Relationships
public section_manager getSections() {
if(!(objSections instanceof section_manager)) {
objSections = new section_manager();
objSections.setWhere("site = " + this.getID());
objSections.load();
}
return objSections;
}
// Parent Relationships
public design_manager getParentDesign() {
if(!(objDesigns instanceof design_manager)) {
objDesigns = new design_manager();
objDesigns.setWhere("site = " + this.getDesign());
objDesigns.load();
}
return objDesigns;
}
}
--- DATA.MANAGER ---
package jPublish.Data;
import java.sql.*;
public abstract class manager extends Object {
// Data Members
////////////////////////////////////////////////////////////
protected data objData;
protected String strError = new String();
// SQL Options
private String strTable = new String();
private String strWhere = new String();
// Data SQL Connection
protected Connection sqlConnection;
protected Statement sqlStatement;
protected ResultSet sqlResults;
// Constructors
////////////////////////////////////////////////////////////
manager() {
System.out.println("jPublish.Data.manager()");
try {
Class.forName("com.mysql.jdbc.Driver").newInstance();
sqlConnection = DriverManager.getConnection(
"jdbc:mysql://localhost/jPublish", "root", "");
sqlStatement = sqlConnection.createStatement(
ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_UPDATABLE);
}
catch (Exception e) {
strError = "Execption error: " + e;
}
}
// Properties
//////////////////////////////////////////////////////////////
public boolean setTable(String strNew) {
if((strNew instanceof String) && (strNew.length() > 0)) {
strTable = strNew;
return true;
} else
return false;
}
public boolean setWhere(String strNew) {
if((strNew instanceof String) && (strNew.length() > 0)) {
if(strWhere.length() > 0)
strWhere += " AND " + strNew;
else
strWhere = strNew;
return true;
} else
return false;
}
public data getData() { return objData; }
public String getError() { return strError; }
public String getTable() { return strTable; }
public String getWhere() { return strWhere; }
public int getCount() {
int iCurr = -1;
int iLast = -1;
try {
iCurr = sqlResults.getRow();
sqlResults.last();
iLast = sqlResults.getRow();
sqlResults.absolute(iCurr);
}
catch (Exception e) { strError = "Exception Error: " + e; }
return iLast;
}
// Methods
/////////////////////////////////////////////////////////////////
public boolean load() {
String strQuery = "";
System.out.println("jPublish.Data.manager.load()");
// Build the Query
strQuery = strQuery + "SELECT * ";
strQuery = strQuery + " FROM " + strTable;
if(strWhere.length() > 0)
strQuery = strQuery + " WHERE " + strWhere;
// Get Results
try {
sqlResults = sqlStatement.executeQuery(strQuery);
}
// Get Errors
catch (Exception e) {
strError = "Exception error: " + e;
return false;
}
return true;
}
public boolean loadFrom(String strTable, String strColumn) {
String strQuery = "";
// Build the Query
strQuery = strQuery + "SELECT " + this.strTable + ".* ";
strQuery = strQuery + " FROM " + strTable + ", " + this.strTable;
strQuery = strQuery + " WHERE " + strTable + "." + strColumn;
strQuery = strQuery + " = " + this.strTable + ".id;";
// Get Results
try {
sqlResults = sqlStatement.executeQuery(strQuery);
}
// Get Errors
catch (Exception e) {
strError = "Exception error: " + e;
return false;
}
return true;
}
public boolean next() {
try { return sqlResults.next(); }
catch (Exception e) {
strError = "Exception error: " + e;
return false;
}
}
public boolean save() {
// Create Varibles
updates objUpdates = objData.getUpdates();
Object[] arrKeys = objUpdates.getKeys();
try {
// Update Record
for(int iCnt = 0; iCnt < arrKeys.length; iCnt++)
sqlResults.updateString(arrKeys[iCnt].toString(),
objUpdates.get(arrKeys[iCnt].toString()));
// Write Changes
if(objData.getID() > 0)
sqlResults.updateRow();
else
sqlResults.insertRow();
}
// Update Errors
catch (Exception e) {
// Set Error
strError = "Exception error: " + e;
return false;
}
return true;
}
// Abstract Functions
//////////////////////////////////////////////////////
// These must be implimented since the extended object only know the
tables.
public abstract boolean fill();
}
--- DATA.MANAGER ---
package jPublish.Data;
import java.sql.*;
public abstract class manager extends Object {
// Data Members
////////////////////////////////////////////////////////////
protected data objData;
protected String strError = new String();
// SQL Options
private String strTable = new String();
private String strWhere = new String();
// Data SQL Connection
protected Connection sqlConnection;
protected Statement sqlStatement;
protected ResultSet sqlResults;
// Constructors
////////////////////////////////////////////////////////////
manager() {
System.out.println("jPublish.Data.manager()");
try {
Class.forName("com.mysql.jdbc.Driver").newInstance();
sqlConnection = DriverManager.getConnection(
"jdbc:mysql://localhost/jPublish", "root", "");
sqlStatement = sqlConnection.createStatement(
ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_UPDATABLE);
}
catch (Exception e) {
strError = "Execption error: " + e;
}
}
// Properties
//////////////////////////////////////////////////////////////
public boolean setTable(String strNew) {
if((strNew instanceof String) && (strNew.length() > 0)) {
strTable = strNew;
return true;
} else
return false;
}
public boolean setWhere(String strNew) {
if((strNew instanceof String) && (strNew.length() > 0)) {
if(strWhere.length() > 0)
strWhere += " AND " + strNew;
else
strWhere = strNew;
return true;
} else
return false;
}
public data getData() { return objData; }
public String getError() { return strError; }
public String getTable() { return strTable; }
public String getWhere() { return strWhere; }
public int getCount() {
int iCurr = -1;
int iLast = -1;
try {
iCurr = sqlResults.getRow();
sqlResults.last();
iLast = sqlResults.getRow();
sqlResults.absolute(iCurr);
}
catch (Exception e) { strError = "Exception Error: " + e; }
return iLast;
}
// Methods
/////////////////////////////////////////////////////////////////
public boolean load() {
String strQuery = "";
System.out.println("jPublish.Data.manager.load()");
// Build the Query
strQuery = strQuery + "SELECT * ";
strQuery = strQuery + " FROM " + strTable;
if(strWhere.length() > 0)
strQuery = strQuery + " WHERE " + strWhere;
// Get Results
try {
sqlResults = sqlStatement.executeQuery(strQuery);
}
// Get Errors
catch (Exception e) {
strError = "Exception error: " + e;
return false;
}
return true;
}
public boolean loadFrom(String strTable, String strColumn) {
String strQuery = "";
// Build the Query
strQuery = strQuery + "SELECT " + this.strTable + ".* ";
strQuery = strQuery + " FROM " + strTable + ", " + this.strTable;
strQuery = strQuery + " WHERE " + strTable + "." + strColumn;
strQuery = strQuery + " = " + this.strTable + ".id;";
// Get Results
try {
sqlResults = sqlStatement.executeQuery(strQuery);
}
// Get Errors
catch (Exception e) {
strError = "Exception error: " + e;
return false;
}
return true;
}
public boolean next() {
try { return sqlResults.next(); }
catch (Exception e) {
strError = "Exception error: " + e;
return false;
}
}
public boolean save() {
// Create Varibles
updates objUpdates = objData.getUpdates();
Object[] arrKeys = objUpdates.getKeys();
try {
// Update Record
for(int iCnt = 0; iCnt < arrKeys.length; iCnt++)
sqlResults.updateString(arrKeys[iCnt].toString(),
objUpdates.get(arrKeys[iCnt].toString()));
// Write Changes
if(objData.getID() > 0)
sqlResults.updateRow();
else
sqlResults.insertRow();
}
// Update Errors
catch (Exception e) {
// Set Error
strError = "Exception error: " + e;
return false;
}
return true;
}
// Abstract Functions
//////////////////////////////////////////////////////
// These must be implimented since the extended object only know the
tables.
public abstract boolean fill();
}
--- DATA.DATA ---
package jPublish.Data;
public abstract class data extends Object {
// Data Menebers
///////////////////////////////////////////////////////////
protected manager objManager;
// Update Tracking
protected updates objUpdates;
// Data
protected long lID;
// Constructors
////////////////////////////////////////////////////////////
data () {
objUpdates = new updates();
}
// Properties
//////////////////////////////////////////////////////////////
public boolean setManager(manager manNew) {
if(manNew != null) {
objManager = manNew;
return true;
}
return false;
}
public boolean setLoaded() { return objUpdates.setUpdated(); }
public manager getManager() { return objManager; }
public updates getUpdates() { return objUpdates; }
// Data Properties
public boolean setID(long lNew) {
if(lNew > 0) {
lID = lNew;
objUpdates.set("id", Long.toString(lNew));
return true;
}
return false;
}
public long getID() { return lID; }
}
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RE: Custom Tag Lib
Posted by Shawn Zernik <sz...@internetworkconsulting.net>.
Mike:
I can't resolve that problem. can I impliment those tags as simple tags:
the JSP spec says that they will not be cached or reused.
Shawn
-----Original Message-----
From: Mike Cherichetti (Renegade Internet)
[mailto:mike@renegadeinternet.com]
Sent: Thursday, August 07, 2003 10:59 PM
To: Tomcat Users List
Subject: RE: Custom Tag Lib
Hi Shawn,
Actually, I wasn't aware that there was an option to disable it. When I
figured out what was happening, I went ahead and handled it in my code. No
telling how other application servers might handle it. If you're only going
to be deploying on Tomcat, disabling pooling would probably save you some
time, but you still might want to handle it in your code to get better
performance.
Mike
-----Original Message-----
From: Shawn Zernik [mailto:szernik@internetworkconsulting.net]
Sent: Thursday, August 07, 2003 11:41 PM
To: Tomcat Users List; mike@renegadeinternet.com
Subject: RE: Custom Tag Lib
Mike:
Thanks sooooo very much... I saw their is a config option in the Jasper to
turn off tag pooling. do you thing that would work too, of shouldI
impliment it in my source code. I'm gonna take a look at it right now.
Shawn
-----Original Message-----
From: Mike Cherichetti (Renegade Internet)
[mailto:mike@renegadeinternet.com]
Sent: Thursday, August 07, 2003 10:28 PM
To: Tomcat Users List
Subject: RE: Custom Tag Lib
Shawn,
I ran into this problem as well when switching from 4.0 to 4.1. I think it
has something to do with 4.1 pooling and re-using tag objects. What I did
in all of my doStartTag(), doAfterBody(), etc... methods was manually call
release() to reset the data in the tags like so:
public int doStartTag() throws JspException
{
try
{
...
}
catch (Exception exception)
{
throw new JspException(exception);
}
finally
{
release();
}
return SKIP_BODY;
}
Have a nice day ...
Sincerely,
Mike Cherichetti
Renegade Internet
Internet Advertising Delivery Solutions
www.renegadeinternet.com
Phone (724) 658-6346
Fax (724) 658-6346
-----Original Message-----
From: Shawn Zernik [mailto:szernik@internetworkconsulting.net]
Sent: Thursday, August 07, 2003 10:56 PM
To: tomcat-user@jakarta.apache.org
Subject: Custom Tag Lib
Tomcat Users:
I've been fighting with some version differences in tom cat wondering why my
app acts severly different on Tomcat 4.1.27 then 4.0.6. It appears that
4.1.27 is not working from my perspective, and have been fighting with it
since monday. None of the books I have touch this subject or ellude to the
problem, and I've seached high and low for solutions.
I'm having a problem working with my custom tag library. The stange part to
this is it appears to work on tomcat 4.0.6 but not on 4.1.27. The library
has a tage called site that extends a base tag, and those tags use other
classes in my data namespace to hit a database.
The tags are returning the proper data in both versions, but in 4.1.27, I
have to "reload" the contect in the manager for it to "register" the changes
from the database. I have added some printlns to std out to track what's
going on. In tomcat 4.0.6 they are going through all the code as I would
exspect it to. I have included each of the class files that are called. I
have also included the printouts from both versions of tomcat to clierify
how each version is handling the calls.
The object hiarchey goes as follows:
jPublish.Tags site extends inc_tag.
jPublish.Data.site_manager extends jPublish.Data.manager, managers contain,
load, and fill datas.
jPublish.Data.site_data extends jPublish.Data.data, used for storing data
and tracking updates.
--- INDEX.JSP ---
<%@ page contentType="text/html" %>
<%@ taglib prefix="inc" uri="inc" %>
<inc:site site="1" action="none"/>
<html>
<head><title><inc:site action="title" /></title></head>
<body>
<h1>Welcome to <inc:site action="title"/>!</h1>
© <inc:site action="copyright"/>
</body>
</html>
--- TOMCAT 4.0.6 STDOUT ---
Starting service Tomcat-Standalone
Apache Tomcat/4.0.6
Starting service Tomcat-Apache
Apache Tomcat/4.0.6
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.setSite()
jPublish.Data.manager()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
Shawn
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.setSite()
jPublish.Data.manager()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
INC
jPublish.Tags.site.doEndTag(): End
--- TOMCAT 4.1.27 STDOUT: db INC then Shawn ---
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.setSite()
jPublish.Data.manager()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.site.loaded()
INC
jPublish.Tags.site.doEndTag(): End
<Change INC to Shawn in DB>
jPublish.Tags.site.setSite()
jPublish.Data.manager()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.site.doEndTag(): End
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.site.loaded()
INC
jPublish.Tags.site.doEndTag(): End
--- SITE TAG "inc:site" ---
package jPublish.Tags;
import jPublish.Data.*;
public class site extends inc_tag {
private site_data objSite;
// Constructors
////////////////////////////////////////////////////////////
public site() {
objManager = (manager) new site_manager();
System.out.println("jPublish.Tags.site()");
}
// Properties
//////////////////////////////////////////////////////////////
public void setSite(String strNew) {
System.out.println("jPublish.Tags.site.setSite()");
objManager = (manager) new site_manager();
objManager.setWhere("id = " + strNew);
}
// Methods
/////////////////////////////////////////////////////////////////
protected boolean loaded() {
if(super.loaded()) {
objSite = (site_data) objData;
System.out.println("jPublish.Tags.site.loaded()");
return true;
} else
return false;
}
public int doEndTag() {
System.out.println("jPublish.Tags.site.doEndTag(): Begin");
if(strAction.equalsIgnoreCase("id"))
if(loaded()) print(Long.toString(objSite.getID()));
if(strAction.equalsIgnoreCase("design"))
if(loaded()) print(Long.toString(objSite.getDesign()));
if(strAction.equalsIgnoreCase("title"))
if(loaded()) print(objSite.getTitle());
if(strAction.equalsIgnoreCase("webmaster"))
if(loaded()) print(objSite.getWebmaster());
if(strAction.equalsIgnoreCase("email"))
if(loaded()) print(objSite.getEmail());
if(strAction.equalsIgnoreCase("copyright"))
if(loaded()) print(objSite.getCopyright());
if(strAction.equalsIgnoreCase("logo"))
if(loaded()) print(objSite.getLogo());
if(strAction.equalsIgnoreCase("next"))
if(objManager.next()) return this.EVAL_BODY_AGAIN;
System.out.println("jPublish.Tags.site.doEndTag(): End");
return this.SKIP_BODY;
}
}
--- INC_TAG ---
package jPublish.Tags;
import jPublish.Data.*;
import javax.servlet.*;
import javax.servlet.jsp.*;
import javax.servlet.jsp.tagext.*;
public abstract class inc_tag extends TagSupport {
// Data Menebers
///////////////////////////////////////////////////////////
protected manager objManager;
protected data objData;
protected String strWhere;
// Action Data
protected String strAction = "none";
private String strOutput = "none";
// Properties
//////////////////////////////////////////////////////////////
public void setAction(String strNew) { strAction = strNew; }
public void setOutput(String strNew) { strOutput = strNew; }
public manager getManager() { return objManager; }
// Internal Methods
////////////////////////////////////////////////////////
protected boolean loaded() {
System.out.println("jPublish.Tags.inc_tag.loaded()");
if(!(objData instanceof data)) {
System.out.println("jPublish.Tags.inc_tag.loaded(): not instance");
if(objManager.load()) {
System.out.println("jPublish.Tags.inc_tag.loaded(): load ok");
if(objManager.next()) {
System.out.println("jPublish.Tags.inc_tag.loaded(): next ok");
if(objManager.fill()) {
System.out.println("jPublish.Tags.inc_tag.loaded(): reached fill.");
objData = objManager.getData();
return true;
} else
return false;
}
} else
return false;
}
// Data Exist: Loaded
return true;
}
protected void print(String strOut) {
JspWriter out = pageContext.getOut();
System.out.println(strOut);
try { out.print(format(strOut)); }
catch (Exception e) { System.out.println("Exception error: " + e); }
}
protected String format(String strIn) {
String strTemp = new String();
char cTemp;
// String Safe
if(strOutput.equalsIgnoreCase("stringsafe")) {
for(int iCnt = 0; iCnt < strIn.length(); iCnt++) {
cTemp = strIn.charAt(iCnt);
switch(cTemp) {
case '\'':
strTemp += "\\\'";
break;
case '\"':
strTemp += "\\\"";
break;
case '\\':
strTemp += "\\\\";
break;
default:
strTemp += cTemp;
break;
}
}
return strTemp;
}
// Strip String
if(strOutput.equalsIgnoreCase("stringsafe")) {
for(int iCnt = 0; iCnt < strIn.length(); iCnt++) {
cTemp = strIn.charAt(iCnt);
switch(cTemp) {
case '\'':
break;
case '\"':
break;
default:
strTemp += cTemp;
break;
}
}
return strTemp;
}
// HTML Safe
if(strOutput.equalsIgnoreCase("htmlsafe")) {
for(int iCnt = 0; iCnt < strIn.length(); iCnt++) {
cTemp = strIn.charAt(iCnt);
switch(cTemp) {
case '<':
strTemp += "<";
break;
case '>':
strTemp += ">";
break;
default:
strTemp += cTemp;
break;
}
}
return strTemp;
}
// None
return strIn;
}
}
--- DATA.SITE_MANAGER ---
package jPublish.Data;
public class site_manager extends manager {
// Constructors
////////////////////////////////////////////////////////////
public site_manager() {
super();
super.setTable("sites");
}
// Methods
/////////////////////////////////////////////////////////////////
public boolean fill() {
site_data dataNew = new site_data();
try {
dataNew.setID(sqlResults.getLong("id"));
dataNew.setDesign(sqlResults.getLong("design"));
dataNew.setTitle(sqlResults.getString("title"));
dataNew.setWebmaster(sqlResults.getString("webmaster"));
dataNew.setEmail(sqlResults.getString("email"));
dataNew.setCopyright(sqlResults.getString("copyright"));
dataNew.setLogo(sqlResults.getString("logo"));
dataNew.setManager((manager) this);
dataNew.setLoaded();
objData = (data) dataNew;
return true;
}
catch (Exception e) {
strError = "Exception error: " + e;
}
return false;
}
}
--- DATA.SITE_DATA ---
package jPublish.Data;
public class site_data extends data {
// Data Menebers
///////////////////////////////////////////////////////////
private long lDesign;
private String strTitle;
private String strWebmaster;
private String strEmail;
private String strCopyright;
private String strLogo;
// Child Relationships
private section_manager objSections;
// Parent Relationships
private design_manager objDesigns;
// Constructors
////////////////////////////////////////////////////////////
public site_data() { super(); }
// Properties
//////////////////////////////////////////////////////////////
public boolean setDesign(long lNew) {
if(lNew > 0) {
lDesign = lNew;
objUpdates.set("design", Long.toString(lNew));
return true;
}
return false;
}
public boolean setTitle(String strNew) {
if(strNew.length() > 0) {
strTitle = strNew;
objUpdates.set("title", strNew);
return true;
}
return false;
}
public boolean setWebmaster(String strNew) {
if(strNew.length() > 0) {
strWebmaster = strNew;
objUpdates.set("webmaster", strNew);
return true;
}
return false;
}
public boolean setEmail(String strNew) {
if(strNew.length() > 0) {
strEmail = strNew;
objUpdates.set("email", strNew);
return true;
}
return false;
}
public boolean setCopyright(String strNew) {
if(strNew.length() > 0) {
strCopyright = strNew;
objUpdates.set("copyright", strNew);
return true;
}
return false;
}
public boolean setLogo(String strNew) {
if(strNew.length() > 0) {
strLogo = strNew;
objUpdates.set("logo", strNew);
return true;
}
return false;
}
public long getDesign() { return lDesign; }
public String getTitle() { return strTitle; }
public String getWebmaster() { return strWebmaster; }
public String getEmail() { return strEmail; }
public String getCopyright() { return strCopyright; }
public String getLogo() { return strLogo; }
// Child Relationships
public section_manager getSections() {
if(!(objSections instanceof section_manager)) {
objSections = new section_manager();
objSections.setWhere("site = " + this.getID());
objSections.load();
}
return objSections;
}
// Parent Relationships
public design_manager getParentDesign() {
if(!(objDesigns instanceof design_manager)) {
objDesigns = new design_manager();
objDesigns.setWhere("site = " + this.getDesign());
objDesigns.load();
}
return objDesigns;
}
}
--- DATA.MANAGER ---
package jPublish.Data;
import java.sql.*;
public abstract class manager extends Object {
// Data Members
////////////////////////////////////////////////////////////
protected data objData;
protected String strError = new String();
// SQL Options
private String strTable = new String();
private String strWhere = new String();
// Data SQL Connection
protected Connection sqlConnection;
protected Statement sqlStatement;
protected ResultSet sqlResults;
// Constructors
////////////////////////////////////////////////////////////
manager() {
System.out.println("jPublish.Data.manager()");
try {
Class.forName("com.mysql.jdbc.Driver").newInstance();
sqlConnection = DriverManager.getConnection(
"jdbc:mysql://localhost/jPublish", "root", "");
sqlStatement = sqlConnection.createStatement(
ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_UPDATABLE);
}
catch (Exception e) {
strError = "Execption error: " + e;
}
}
// Properties
//////////////////////////////////////////////////////////////
public boolean setTable(String strNew) {
if((strNew instanceof String) && (strNew.length() > 0)) {
strTable = strNew;
return true;
} else
return false;
}
public boolean setWhere(String strNew) {
if((strNew instanceof String) && (strNew.length() > 0)) {
if(strWhere.length() > 0)
strWhere += " AND " + strNew;
else
strWhere = strNew;
return true;
} else
return false;
}
public data getData() { return objData; }
public String getError() { return strError; }
public String getTable() { return strTable; }
public String getWhere() { return strWhere; }
public int getCount() {
int iCurr = -1;
int iLast = -1;
try {
iCurr = sqlResults.getRow();
sqlResults.last();
iLast = sqlResults.getRow();
sqlResults.absolute(iCurr);
}
catch (Exception e) { strError = "Exception Error: " + e; }
return iLast;
}
// Methods
/////////////////////////////////////////////////////////////////
public boolean load() {
String strQuery = "";
System.out.println("jPublish.Data.manager.load()");
// Build the Query
strQuery = strQuery + "SELECT * ";
strQuery = strQuery + " FROM " + strTable;
if(strWhere.length() > 0)
strQuery = strQuery + " WHERE " + strWhere;
// Get Results
try {
sqlResults = sqlStatement.executeQuery(strQuery);
}
// Get Errors
catch (Exception e) {
strError = "Exception error: " + e;
return false;
}
return true;
}
public boolean loadFrom(String strTable, String strColumn) {
String strQuery = "";
// Build the Query
strQuery = strQuery + "SELECT " + this.strTable + ".* ";
strQuery = strQuery + " FROM " + strTable + ", " + this.strTable;
strQuery = strQuery + " WHERE " + strTable + "." + strColumn;
strQuery = strQuery + " = " + this.strTable + ".id;";
// Get Results
try {
sqlResults = sqlStatement.executeQuery(strQuery);
}
// Get Errors
catch (Exception e) {
strError = "Exception error: " + e;
return false;
}
return true;
}
public boolean next() {
try { return sqlResults.next(); }
catch (Exception e) {
strError = "Exception error: " + e;
return false;
}
}
public boolean save() {
// Create Varibles
updates objUpdates = objData.getUpdates();
Object[] arrKeys = objUpdates.getKeys();
try {
// Update Record
for(int iCnt = 0; iCnt < arrKeys.length; iCnt++)
sqlResults.updateString(arrKeys[iCnt].toString(),
objUpdates.get(arrKeys[iCnt].toString()));
// Write Changes
if(objData.getID() > 0)
sqlResults.updateRow();
else
sqlResults.insertRow();
}
// Update Errors
catch (Exception e) {
// Set Error
strError = "Exception error: " + e;
return false;
}
return true;
}
// Abstract Functions
//////////////////////////////////////////////////////
// These must be implimented since the extended object only know the
tables.
public abstract boolean fill();
}
--- DATA.MANAGER ---
package jPublish.Data;
import java.sql.*;
public abstract class manager extends Object {
// Data Members
////////////////////////////////////////////////////////////
protected data objData;
protected String strError = new String();
// SQL Options
private String strTable = new String();
private String strWhere = new String();
// Data SQL Connection
protected Connection sqlConnection;
protected Statement sqlStatement;
protected ResultSet sqlResults;
// Constructors
////////////////////////////////////////////////////////////
manager() {
System.out.println("jPublish.Data.manager()");
try {
Class.forName("com.mysql.jdbc.Driver").newInstance();
sqlConnection = DriverManager.getConnection(
"jdbc:mysql://localhost/jPublish", "root", "");
sqlStatement = sqlConnection.createStatement(
ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_UPDATABLE);
}
catch (Exception e) {
strError = "Execption error: " + e;
}
}
// Properties
//////////////////////////////////////////////////////////////
public boolean setTable(String strNew) {
if((strNew instanceof String) && (strNew.length() > 0)) {
strTable = strNew;
return true;
} else
return false;
}
public boolean setWhere(String strNew) {
if((strNew instanceof String) && (strNew.length() > 0)) {
if(strWhere.length() > 0)
strWhere += " AND " + strNew;
else
strWhere = strNew;
return true;
} else
return false;
}
public data getData() { return objData; }
public String getError() { return strError; }
public String getTable() { return strTable; }
public String getWhere() { return strWhere; }
public int getCount() {
int iCurr = -1;
int iLast = -1;
try {
iCurr = sqlResults.getRow();
sqlResults.last();
iLast = sqlResults.getRow();
sqlResults.absolute(iCurr);
}
catch (Exception e) { strError = "Exception Error: " + e; }
return iLast;
}
// Methods
/////////////////////////////////////////////////////////////////
public boolean load() {
String strQuery = "";
System.out.println("jPublish.Data.manager.load()");
// Build the Query
strQuery = strQuery + "SELECT * ";
strQuery = strQuery + " FROM " + strTable;
if(strWhere.length() > 0)
strQuery = strQuery + " WHERE " + strWhere;
// Get Results
try {
sqlResults = sqlStatement.executeQuery(strQuery);
}
// Get Errors
catch (Exception e) {
strError = "Exception error: " + e;
return false;
}
return true;
}
public boolean loadFrom(String strTable, String strColumn) {
String strQuery = "";
// Build the Query
strQuery = strQuery + "SELECT " + this.strTable + ".* ";
strQuery = strQuery + " FROM " + strTable + ", " + this.strTable;
strQuery = strQuery + " WHERE " + strTable + "." + strColumn;
strQuery = strQuery + " = " + this.strTable + ".id;";
// Get Results
try {
sqlResults = sqlStatement.executeQuery(strQuery);
}
// Get Errors
catch (Exception e) {
strError = "Exception error: " + e;
return false;
}
return true;
}
public boolean next() {
try { return sqlResults.next(); }
catch (Exception e) {
strError = "Exception error: " + e;
return false;
}
}
public boolean save() {
// Create Varibles
updates objUpdates = objData.getUpdates();
Object[] arrKeys = objUpdates.getKeys();
try {
// Update Record
for(int iCnt = 0; iCnt < arrKeys.length; iCnt++)
sqlResults.updateString(arrKeys[iCnt].toString(),
objUpdates.get(arrKeys[iCnt].toString()));
// Write Changes
if(objData.getID() > 0)
sqlResults.updateRow();
else
sqlResults.insertRow();
}
// Update Errors
catch (Exception e) {
// Set Error
strError = "Exception error: " + e;
return false;
}
return true;
}
// Abstract Functions
//////////////////////////////////////////////////////
// These must be implimented since the extended object only know the
tables.
public abstract boolean fill();
}
--- DATA.DATA ---
package jPublish.Data;
public abstract class data extends Object {
// Data Menebers
///////////////////////////////////////////////////////////
protected manager objManager;
// Update Tracking
protected updates objUpdates;
// Data
protected long lID;
// Constructors
////////////////////////////////////////////////////////////
data () {
objUpdates = new updates();
}
// Properties
//////////////////////////////////////////////////////////////
public boolean setManager(manager manNew) {
if(manNew != null) {
objManager = manNew;
return true;
}
return false;
}
public boolean setLoaded() { return objUpdates.setUpdated(); }
public manager getManager() { return objManager; }
public updates getUpdates() { return objUpdates; }
// Data Properties
public boolean setID(long lNew) {
if(lNew > 0) {
lID = lNew;
objUpdates.set("id", Long.toString(lNew));
return true;
}
return false;
}
public long getID() { return lID; }
}
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RE: Custom Tag Lib
Posted by "Mike Cherichetti (Renegade Internet)" <mi...@renegadeinternet.com>.
Hi Shawn,
Actually, I wasn't aware that there was an option to disable it. When I
figured out what was happening, I went ahead and handled it in my code. No
telling how other application servers might handle it. If you're only going
to be deploying on Tomcat, disabling pooling would probably save you some
time, but you still might want to handle it in your code to get better
performance.
Mike
-----Original Message-----
From: Shawn Zernik [mailto:szernik@internetworkconsulting.net]
Sent: Thursday, August 07, 2003 11:41 PM
To: Tomcat Users List; mike@renegadeinternet.com
Subject: RE: Custom Tag Lib
Mike:
Thanks sooooo very much... I saw their is a config option in the Jasper to
turn off tag pooling. do you thing that would work too, of shouldI
impliment it in my source code. I'm gonna take a look at it right now.
Shawn
-----Original Message-----
From: Mike Cherichetti (Renegade Internet)
[mailto:mike@renegadeinternet.com]
Sent: Thursday, August 07, 2003 10:28 PM
To: Tomcat Users List
Subject: RE: Custom Tag Lib
Shawn,
I ran into this problem as well when switching from 4.0 to 4.1. I think it
has something to do with 4.1 pooling and re-using tag objects. What I did
in all of my doStartTag(), doAfterBody(), etc... methods was manually call
release() to reset the data in the tags like so:
public int doStartTag() throws JspException
{
try
{
...
}
catch (Exception exception)
{
throw new JspException(exception);
}
finally
{
release();
}
return SKIP_BODY;
}
Have a nice day ...
Sincerely,
Mike Cherichetti
Renegade Internet
Internet Advertising Delivery Solutions
www.renegadeinternet.com
Phone (724) 658-6346
Fax (724) 658-6346
-----Original Message-----
From: Shawn Zernik [mailto:szernik@internetworkconsulting.net]
Sent: Thursday, August 07, 2003 10:56 PM
To: tomcat-user@jakarta.apache.org
Subject: Custom Tag Lib
Tomcat Users:
I've been fighting with some version differences in tom cat wondering why my
app acts severly different on Tomcat 4.1.27 then 4.0.6. It appears that
4.1.27 is not working from my perspective, and have been fighting with it
since monday. None of the books I have touch this subject or ellude to the
problem, and I've seached high and low for solutions.
I'm having a problem working with my custom tag library. The stange part to
this is it appears to work on tomcat 4.0.6 but not on 4.1.27. The library
has a tage called site that extends a base tag, and those tags use other
classes in my data namespace to hit a database.
The tags are returning the proper data in both versions, but in 4.1.27, I
have to "reload" the contect in the manager for it to "register" the changes
from the database. I have added some printlns to std out to track what's
going on. In tomcat 4.0.6 they are going through all the code as I would
exspect it to. I have included each of the class files that are called. I
have also included the printouts from both versions of tomcat to clierify
how each version is handling the calls.
The object hiarchey goes as follows:
jPublish.Tags site extends inc_tag.
jPublish.Data.site_manager extends jPublish.Data.manager, managers contain,
load, and fill datas.
jPublish.Data.site_data extends jPublish.Data.data, used for storing data
and tracking updates.
--- INDEX.JSP ---
<%@ page contentType="text/html" %>
<%@ taglib prefix="inc" uri="inc" %>
<inc:site site="1" action="none"/>
<html>
<head><title><inc:site action="title" /></title></head>
<body>
<h1>Welcome to <inc:site action="title"/>!</h1>
© <inc:site action="copyright"/>
</body>
</html>
--- TOMCAT 4.0.6 STDOUT ---
Starting service Tomcat-Standalone
Apache Tomcat/4.0.6
Starting service Tomcat-Apache
Apache Tomcat/4.0.6
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.setSite()
jPublish.Data.manager()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
Shawn
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.setSite()
jPublish.Data.manager()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
INC
jPublish.Tags.site.doEndTag(): End
--- TOMCAT 4.1.27 STDOUT: db INC then Shawn ---
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.setSite()
jPublish.Data.manager()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.site.loaded()
INC
jPublish.Tags.site.doEndTag(): End
<Change INC to Shawn in DB>
jPublish.Tags.site.setSite()
jPublish.Data.manager()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.site.doEndTag(): End
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.site.loaded()
INC
jPublish.Tags.site.doEndTag(): End
--- SITE TAG "inc:site" ---
package jPublish.Tags;
import jPublish.Data.*;
public class site extends inc_tag {
private site_data objSite;
// Constructors
////////////////////////////////////////////////////////////
public site() {
objManager = (manager) new site_manager();
System.out.println("jPublish.Tags.site()");
}
// Properties
//////////////////////////////////////////////////////////////
public void setSite(String strNew) {
System.out.println("jPublish.Tags.site.setSite()");
objManager = (manager) new site_manager();
objManager.setWhere("id = " + strNew);
}
// Methods
/////////////////////////////////////////////////////////////////
protected boolean loaded() {
if(super.loaded()) {
objSite = (site_data) objData;
System.out.println("jPublish.Tags.site.loaded()");
return true;
} else
return false;
}
public int doEndTag() {
System.out.println("jPublish.Tags.site.doEndTag(): Begin");
if(strAction.equalsIgnoreCase("id"))
if(loaded()) print(Long.toString(objSite.getID()));
if(strAction.equalsIgnoreCase("design"))
if(loaded()) print(Long.toString(objSite.getDesign()));
if(strAction.equalsIgnoreCase("title"))
if(loaded()) print(objSite.getTitle());
if(strAction.equalsIgnoreCase("webmaster"))
if(loaded()) print(objSite.getWebmaster());
if(strAction.equalsIgnoreCase("email"))
if(loaded()) print(objSite.getEmail());
if(strAction.equalsIgnoreCase("copyright"))
if(loaded()) print(objSite.getCopyright());
if(strAction.equalsIgnoreCase("logo"))
if(loaded()) print(objSite.getLogo());
if(strAction.equalsIgnoreCase("next"))
if(objManager.next()) return this.EVAL_BODY_AGAIN;
System.out.println("jPublish.Tags.site.doEndTag(): End");
return this.SKIP_BODY;
}
}
--- INC_TAG ---
package jPublish.Tags;
import jPublish.Data.*;
import javax.servlet.*;
import javax.servlet.jsp.*;
import javax.servlet.jsp.tagext.*;
public abstract class inc_tag extends TagSupport {
// Data Menebers
///////////////////////////////////////////////////////////
protected manager objManager;
protected data objData;
protected String strWhere;
// Action Data
protected String strAction = "none";
private String strOutput = "none";
// Properties
//////////////////////////////////////////////////////////////
public void setAction(String strNew) { strAction = strNew; }
public void setOutput(String strNew) { strOutput = strNew; }
public manager getManager() { return objManager; }
// Internal Methods
////////////////////////////////////////////////////////
protected boolean loaded() {
System.out.println("jPublish.Tags.inc_tag.loaded()");
if(!(objData instanceof data)) {
System.out.println("jPublish.Tags.inc_tag.loaded(): not instance");
if(objManager.load()) {
System.out.println("jPublish.Tags.inc_tag.loaded(): load ok");
if(objManager.next()) {
System.out.println("jPublish.Tags.inc_tag.loaded(): next ok");
if(objManager.fill()) {
System.out.println("jPublish.Tags.inc_tag.loaded(): reached fill.");
objData = objManager.getData();
return true;
} else
return false;
}
} else
return false;
}
// Data Exist: Loaded
return true;
}
protected void print(String strOut) {
JspWriter out = pageContext.getOut();
System.out.println(strOut);
try { out.print(format(strOut)); }
catch (Exception e) { System.out.println("Exception error: " + e); }
}
protected String format(String strIn) {
String strTemp = new String();
char cTemp;
// String Safe
if(strOutput.equalsIgnoreCase("stringsafe")) {
for(int iCnt = 0; iCnt < strIn.length(); iCnt++) {
cTemp = strIn.charAt(iCnt);
switch(cTemp) {
case '\'':
strTemp += "\\\'";
break;
case '\"':
strTemp += "\\\"";
break;
case '\\':
strTemp += "\\\\";
break;
default:
strTemp += cTemp;
break;
}
}
return strTemp;
}
// Strip String
if(strOutput.equalsIgnoreCase("stringsafe")) {
for(int iCnt = 0; iCnt < strIn.length(); iCnt++) {
cTemp = strIn.charAt(iCnt);
switch(cTemp) {
case '\'':
break;
case '\"':
break;
default:
strTemp += cTemp;
break;
}
}
return strTemp;
}
// HTML Safe
if(strOutput.equalsIgnoreCase("htmlsafe")) {
for(int iCnt = 0; iCnt < strIn.length(); iCnt++) {
cTemp = strIn.charAt(iCnt);
switch(cTemp) {
case '<':
strTemp += "<";
break;
case '>':
strTemp += ">";
break;
default:
strTemp += cTemp;
break;
}
}
return strTemp;
}
// None
return strIn;
}
}
--- DATA.SITE_MANAGER ---
package jPublish.Data;
public class site_manager extends manager {
// Constructors
////////////////////////////////////////////////////////////
public site_manager() {
super();
super.setTable("sites");
}
// Methods
/////////////////////////////////////////////////////////////////
public boolean fill() {
site_data dataNew = new site_data();
try {
dataNew.setID(sqlResults.getLong("id"));
dataNew.setDesign(sqlResults.getLong("design"));
dataNew.setTitle(sqlResults.getString("title"));
dataNew.setWebmaster(sqlResults.getString("webmaster"));
dataNew.setEmail(sqlResults.getString("email"));
dataNew.setCopyright(sqlResults.getString("copyright"));
dataNew.setLogo(sqlResults.getString("logo"));
dataNew.setManager((manager) this);
dataNew.setLoaded();
objData = (data) dataNew;
return true;
}
catch (Exception e) {
strError = "Exception error: " + e;
}
return false;
}
}
--- DATA.SITE_DATA ---
package jPublish.Data;
public class site_data extends data {
// Data Menebers
///////////////////////////////////////////////////////////
private long lDesign;
private String strTitle;
private String strWebmaster;
private String strEmail;
private String strCopyright;
private String strLogo;
// Child Relationships
private section_manager objSections;
// Parent Relationships
private design_manager objDesigns;
// Constructors
////////////////////////////////////////////////////////////
public site_data() { super(); }
// Properties
//////////////////////////////////////////////////////////////
public boolean setDesign(long lNew) {
if(lNew > 0) {
lDesign = lNew;
objUpdates.set("design", Long.toString(lNew));
return true;
}
return false;
}
public boolean setTitle(String strNew) {
if(strNew.length() > 0) {
strTitle = strNew;
objUpdates.set("title", strNew);
return true;
}
return false;
}
public boolean setWebmaster(String strNew) {
if(strNew.length() > 0) {
strWebmaster = strNew;
objUpdates.set("webmaster", strNew);
return true;
}
return false;
}
public boolean setEmail(String strNew) {
if(strNew.length() > 0) {
strEmail = strNew;
objUpdates.set("email", strNew);
return true;
}
return false;
}
public boolean setCopyright(String strNew) {
if(strNew.length() > 0) {
strCopyright = strNew;
objUpdates.set("copyright", strNew);
return true;
}
return false;
}
public boolean setLogo(String strNew) {
if(strNew.length() > 0) {
strLogo = strNew;
objUpdates.set("logo", strNew);
return true;
}
return false;
}
public long getDesign() { return lDesign; }
public String getTitle() { return strTitle; }
public String getWebmaster() { return strWebmaster; }
public String getEmail() { return strEmail; }
public String getCopyright() { return strCopyright; }
public String getLogo() { return strLogo; }
// Child Relationships
public section_manager getSections() {
if(!(objSections instanceof section_manager)) {
objSections = new section_manager();
objSections.setWhere("site = " + this.getID());
objSections.load();
}
return objSections;
}
// Parent Relationships
public design_manager getParentDesign() {
if(!(objDesigns instanceof design_manager)) {
objDesigns = new design_manager();
objDesigns.setWhere("site = " + this.getDesign());
objDesigns.load();
}
return objDesigns;
}
}
--- DATA.MANAGER ---
package jPublish.Data;
import java.sql.*;
public abstract class manager extends Object {
// Data Members
////////////////////////////////////////////////////////////
protected data objData;
protected String strError = new String();
// SQL Options
private String strTable = new String();
private String strWhere = new String();
// Data SQL Connection
protected Connection sqlConnection;
protected Statement sqlStatement;
protected ResultSet sqlResults;
// Constructors
////////////////////////////////////////////////////////////
manager() {
System.out.println("jPublish.Data.manager()");
try {
Class.forName("com.mysql.jdbc.Driver").newInstance();
sqlConnection = DriverManager.getConnection(
"jdbc:mysql://localhost/jPublish", "root", "");
sqlStatement = sqlConnection.createStatement(
ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_UPDATABLE);
}
catch (Exception e) {
strError = "Execption error: " + e;
}
}
// Properties
//////////////////////////////////////////////////////////////
public boolean setTable(String strNew) {
if((strNew instanceof String) && (strNew.length() > 0)) {
strTable = strNew;
return true;
} else
return false;
}
public boolean setWhere(String strNew) {
if((strNew instanceof String) && (strNew.length() > 0)) {
if(strWhere.length() > 0)
strWhere += " AND " + strNew;
else
strWhere = strNew;
return true;
} else
return false;
}
public data getData() { return objData; }
public String getError() { return strError; }
public String getTable() { return strTable; }
public String getWhere() { return strWhere; }
public int getCount() {
int iCurr = -1;
int iLast = -1;
try {
iCurr = sqlResults.getRow();
sqlResults.last();
iLast = sqlResults.getRow();
sqlResults.absolute(iCurr);
}
catch (Exception e) { strError = "Exception Error: " + e; }
return iLast;
}
// Methods
/////////////////////////////////////////////////////////////////
public boolean load() {
String strQuery = "";
System.out.println("jPublish.Data.manager.load()");
// Build the Query
strQuery = strQuery + "SELECT * ";
strQuery = strQuery + " FROM " + strTable;
if(strWhere.length() > 0)
strQuery = strQuery + " WHERE " + strWhere;
// Get Results
try {
sqlResults = sqlStatement.executeQuery(strQuery);
}
// Get Errors
catch (Exception e) {
strError = "Exception error: " + e;
return false;
}
return true;
}
public boolean loadFrom(String strTable, String strColumn) {
String strQuery = "";
// Build the Query
strQuery = strQuery + "SELECT " + this.strTable + ".* ";
strQuery = strQuery + " FROM " + strTable + ", " + this.strTable;
strQuery = strQuery + " WHERE " + strTable + "." + strColumn;
strQuery = strQuery + " = " + this.strTable + ".id;";
// Get Results
try {
sqlResults = sqlStatement.executeQuery(strQuery);
}
// Get Errors
catch (Exception e) {
strError = "Exception error: " + e;
return false;
}
return true;
}
public boolean next() {
try { return sqlResults.next(); }
catch (Exception e) {
strError = "Exception error: " + e;
return false;
}
}
public boolean save() {
// Create Varibles
updates objUpdates = objData.getUpdates();
Object[] arrKeys = objUpdates.getKeys();
try {
// Update Record
for(int iCnt = 0; iCnt < arrKeys.length; iCnt++)
sqlResults.updateString(arrKeys[iCnt].toString(),
objUpdates.get(arrKeys[iCnt].toString()));
// Write Changes
if(objData.getID() > 0)
sqlResults.updateRow();
else
sqlResults.insertRow();
}
// Update Errors
catch (Exception e) {
// Set Error
strError = "Exception error: " + e;
return false;
}
return true;
}
// Abstract Functions
//////////////////////////////////////////////////////
// These must be implimented since the extended object only know the
tables.
public abstract boolean fill();
}
--- DATA.MANAGER ---
package jPublish.Data;
import java.sql.*;
public abstract class manager extends Object {
// Data Members
////////////////////////////////////////////////////////////
protected data objData;
protected String strError = new String();
// SQL Options
private String strTable = new String();
private String strWhere = new String();
// Data SQL Connection
protected Connection sqlConnection;
protected Statement sqlStatement;
protected ResultSet sqlResults;
// Constructors
////////////////////////////////////////////////////////////
manager() {
System.out.println("jPublish.Data.manager()");
try {
Class.forName("com.mysql.jdbc.Driver").newInstance();
sqlConnection = DriverManager.getConnection(
"jdbc:mysql://localhost/jPublish", "root", "");
sqlStatement = sqlConnection.createStatement(
ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_UPDATABLE);
}
catch (Exception e) {
strError = "Execption error: " + e;
}
}
// Properties
//////////////////////////////////////////////////////////////
public boolean setTable(String strNew) {
if((strNew instanceof String) && (strNew.length() > 0)) {
strTable = strNew;
return true;
} else
return false;
}
public boolean setWhere(String strNew) {
if((strNew instanceof String) && (strNew.length() > 0)) {
if(strWhere.length() > 0)
strWhere += " AND " + strNew;
else
strWhere = strNew;
return true;
} else
return false;
}
public data getData() { return objData; }
public String getError() { return strError; }
public String getTable() { return strTable; }
public String getWhere() { return strWhere; }
public int getCount() {
int iCurr = -1;
int iLast = -1;
try {
iCurr = sqlResults.getRow();
sqlResults.last();
iLast = sqlResults.getRow();
sqlResults.absolute(iCurr);
}
catch (Exception e) { strError = "Exception Error: " + e; }
return iLast;
}
// Methods
/////////////////////////////////////////////////////////////////
public boolean load() {
String strQuery = "";
System.out.println("jPublish.Data.manager.load()");
// Build the Query
strQuery = strQuery + "SELECT * ";
strQuery = strQuery + " FROM " + strTable;
if(strWhere.length() > 0)
strQuery = strQuery + " WHERE " + strWhere;
// Get Results
try {
sqlResults = sqlStatement.executeQuery(strQuery);
}
// Get Errors
catch (Exception e) {
strError = "Exception error: " + e;
return false;
}
return true;
}
public boolean loadFrom(String strTable, String strColumn) {
String strQuery = "";
// Build the Query
strQuery = strQuery + "SELECT " + this.strTable + ".* ";
strQuery = strQuery + " FROM " + strTable + ", " + this.strTable;
strQuery = strQuery + " WHERE " + strTable + "." + strColumn;
strQuery = strQuery + " = " + this.strTable + ".id;";
// Get Results
try {
sqlResults = sqlStatement.executeQuery(strQuery);
}
// Get Errors
catch (Exception e) {
strError = "Exception error: " + e;
return false;
}
return true;
}
public boolean next() {
try { return sqlResults.next(); }
catch (Exception e) {
strError = "Exception error: " + e;
return false;
}
}
public boolean save() {
// Create Varibles
updates objUpdates = objData.getUpdates();
Object[] arrKeys = objUpdates.getKeys();
try {
// Update Record
for(int iCnt = 0; iCnt < arrKeys.length; iCnt++)
sqlResults.updateString(arrKeys[iCnt].toString(),
objUpdates.get(arrKeys[iCnt].toString()));
// Write Changes
if(objData.getID() > 0)
sqlResults.updateRow();
else
sqlResults.insertRow();
}
// Update Errors
catch (Exception e) {
// Set Error
strError = "Exception error: " + e;
return false;
}
return true;
}
// Abstract Functions
//////////////////////////////////////////////////////
// These must be implimented since the extended object only know the
tables.
public abstract boolean fill();
}
--- DATA.DATA ---
package jPublish.Data;
public abstract class data extends Object {
// Data Menebers
///////////////////////////////////////////////////////////
protected manager objManager;
// Update Tracking
protected updates objUpdates;
// Data
protected long lID;
// Constructors
////////////////////////////////////////////////////////////
data () {
objUpdates = new updates();
}
// Properties
//////////////////////////////////////////////////////////////
public boolean setManager(manager manNew) {
if(manNew != null) {
objManager = manNew;
return true;
}
return false;
}
public boolean setLoaded() { return objUpdates.setUpdated(); }
public manager getManager() { return objManager; }
public updates getUpdates() { return objUpdates; }
// Data Properties
public boolean setID(long lNew) {
if(lNew > 0) {
lID = lNew;
objUpdates.set("id", Long.toString(lNew));
return true;
}
return false;
}
public long getID() { return lID; }
}
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RE: Custom Tag Lib
Posted by "Mike Cherichetti (Renegade Internet)" <mi...@renegadeinternet.com>.
Hi Shawn,
Actually, I wasn't aware that there was an option to disable it. When I
figured out what was happening, I went ahead and handled it in my code. No
telling how other application servers might handle it. If you're only going
to be deploying on Tomcat, disabling pooling would probably save you some
time, but you still might want to handle it in your code to get better
performance.
Mike
-----Original Message-----
From: Shawn Zernik [mailto:szernik@internetworkconsulting.net]
Sent: Thursday, August 07, 2003 11:41 PM
To: Tomcat Users List; mike@renegadeinternet.com
Subject: RE: Custom Tag Lib
Mike:
Thanks sooooo very much... I saw their is a config option in the Jasper to
turn off tag pooling. do you thing that would work too, of shouldI
impliment it in my source code. I'm gonna take a look at it right now.
Shawn
-----Original Message-----
From: Mike Cherichetti (Renegade Internet)
[mailto:mike@renegadeinternet.com]
Sent: Thursday, August 07, 2003 10:28 PM
To: Tomcat Users List
Subject: RE: Custom Tag Lib
Shawn,
I ran into this problem as well when switching from 4.0 to 4.1. I think it
has something to do with 4.1 pooling and re-using tag objects. What I did
in all of my doStartTag(), doAfterBody(), etc... methods was manually call
release() to reset the data in the tags like so:
public int doStartTag() throws JspException
{
try
{
...
}
catch (Exception exception)
{
throw new JspException(exception);
}
finally
{
release();
}
return SKIP_BODY;
}
Have a nice day ...
Sincerely,
Mike Cherichetti
Renegade Internet
Internet Advertising Delivery Solutions
www.renegadeinternet.com
Phone (724) 658-6346
Fax (724) 658-6346
-----Original Message-----
From: Shawn Zernik [mailto:szernik@internetworkconsulting.net]
Sent: Thursday, August 07, 2003 10:56 PM
To: tomcat-user@jakarta.apache.org
Subject: Custom Tag Lib
Tomcat Users:
I've been fighting with some version differences in tom cat wondering why my
app acts severly different on Tomcat 4.1.27 then 4.0.6. It appears that
4.1.27 is not working from my perspective, and have been fighting with it
since monday. None of the books I have touch this subject or ellude to the
problem, and I've seached high and low for solutions.
I'm having a problem working with my custom tag library. The stange part to
this is it appears to work on tomcat 4.0.6 but not on 4.1.27. The library
has a tage called site that extends a base tag, and those tags use other
classes in my data namespace to hit a database.
The tags are returning the proper data in both versions, but in 4.1.27, I
have to "reload" the contect in the manager for it to "register" the changes
from the database. I have added some printlns to std out to track what's
going on. In tomcat 4.0.6 they are going through all the code as I would
exspect it to. I have included each of the class files that are called. I
have also included the printouts from both versions of tomcat to clierify
how each version is handling the calls.
The object hiarchey goes as follows:
jPublish.Tags site extends inc_tag.
jPublish.Data.site_manager extends jPublish.Data.manager, managers contain,
load, and fill datas.
jPublish.Data.site_data extends jPublish.Data.data, used for storing data
and tracking updates.
--- INDEX.JSP ---
<%@ page contentType="text/html" %>
<%@ taglib prefix="inc" uri="inc" %>
<inc:site site="1" action="none"/>
<html>
<head><title><inc:site action="title" /></title></head>
<body>
<h1>Welcome to <inc:site action="title"/>!</h1>
© <inc:site action="copyright"/>
</body>
</html>
--- TOMCAT 4.0.6 STDOUT ---
Starting service Tomcat-Standalone
Apache Tomcat/4.0.6
Starting service Tomcat-Apache
Apache Tomcat/4.0.6
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.setSite()
jPublish.Data.manager()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
Shawn
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.setSite()
jPublish.Data.manager()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
INC
jPublish.Tags.site.doEndTag(): End
--- TOMCAT 4.1.27 STDOUT: db INC then Shawn ---
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.setSite()
jPublish.Data.manager()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.site.loaded()
INC
jPublish.Tags.site.doEndTag(): End
<Change INC to Shawn in DB>
jPublish.Tags.site.setSite()
jPublish.Data.manager()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.site.doEndTag(): End
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.site.loaded()
INC
jPublish.Tags.site.doEndTag(): End
--- SITE TAG "inc:site" ---
package jPublish.Tags;
import jPublish.Data.*;
public class site extends inc_tag {
private site_data objSite;
// Constructors
////////////////////////////////////////////////////////////
public site() {
objManager = (manager) new site_manager();
System.out.println("jPublish.Tags.site()");
}
// Properties
//////////////////////////////////////////////////////////////
public void setSite(String strNew) {
System.out.println("jPublish.Tags.site.setSite()");
objManager = (manager) new site_manager();
objManager.setWhere("id = " + strNew);
}
// Methods
/////////////////////////////////////////////////////////////////
protected boolean loaded() {
if(super.loaded()) {
objSite = (site_data) objData;
System.out.println("jPublish.Tags.site.loaded()");
return true;
} else
return false;
}
public int doEndTag() {
System.out.println("jPublish.Tags.site.doEndTag(): Begin");
if(strAction.equalsIgnoreCase("id"))
if(loaded()) print(Long.toString(objSite.getID()));
if(strAction.equalsIgnoreCase("design"))
if(loaded()) print(Long.toString(objSite.getDesign()));
if(strAction.equalsIgnoreCase("title"))
if(loaded()) print(objSite.getTitle());
if(strAction.equalsIgnoreCase("webmaster"))
if(loaded()) print(objSite.getWebmaster());
if(strAction.equalsIgnoreCase("email"))
if(loaded()) print(objSite.getEmail());
if(strAction.equalsIgnoreCase("copyright"))
if(loaded()) print(objSite.getCopyright());
if(strAction.equalsIgnoreCase("logo"))
if(loaded()) print(objSite.getLogo());
if(strAction.equalsIgnoreCase("next"))
if(objManager.next()) return this.EVAL_BODY_AGAIN;
System.out.println("jPublish.Tags.site.doEndTag(): End");
return this.SKIP_BODY;
}
}
--- INC_TAG ---
package jPublish.Tags;
import jPublish.Data.*;
import javax.servlet.*;
import javax.servlet.jsp.*;
import javax.servlet.jsp.tagext.*;
public abstract class inc_tag extends TagSupport {
// Data Menebers
///////////////////////////////////////////////////////////
protected manager objManager;
protected data objData;
protected String strWhere;
// Action Data
protected String strAction = "none";
private String strOutput = "none";
// Properties
//////////////////////////////////////////////////////////////
public void setAction(String strNew) { strAction = strNew; }
public void setOutput(String strNew) { strOutput = strNew; }
public manager getManager() { return objManager; }
// Internal Methods
////////////////////////////////////////////////////////
protected boolean loaded() {
System.out.println("jPublish.Tags.inc_tag.loaded()");
if(!(objData instanceof data)) {
System.out.println("jPublish.Tags.inc_tag.loaded(): not instance");
if(objManager.load()) {
System.out.println("jPublish.Tags.inc_tag.loaded(): load ok");
if(objManager.next()) {
System.out.println("jPublish.Tags.inc_tag.loaded(): next ok");
if(objManager.fill()) {
System.out.println("jPublish.Tags.inc_tag.loaded(): reached fill.");
objData = objManager.getData();
return true;
} else
return false;
}
} else
return false;
}
// Data Exist: Loaded
return true;
}
protected void print(String strOut) {
JspWriter out = pageContext.getOut();
System.out.println(strOut);
try { out.print(format(strOut)); }
catch (Exception e) { System.out.println("Exception error: " + e); }
}
protected String format(String strIn) {
String strTemp = new String();
char cTemp;
// String Safe
if(strOutput.equalsIgnoreCase("stringsafe")) {
for(int iCnt = 0; iCnt < strIn.length(); iCnt++) {
cTemp = strIn.charAt(iCnt);
switch(cTemp) {
case '\'':
strTemp += "\\\'";
break;
case '\"':
strTemp += "\\\"";
break;
case '\\':
strTemp += "\\\\";
break;
default:
strTemp += cTemp;
break;
}
}
return strTemp;
}
// Strip String
if(strOutput.equalsIgnoreCase("stringsafe")) {
for(int iCnt = 0; iCnt < strIn.length(); iCnt++) {
cTemp = strIn.charAt(iCnt);
switch(cTemp) {
case '\'':
break;
case '\"':
break;
default:
strTemp += cTemp;
break;
}
}
return strTemp;
}
// HTML Safe
if(strOutput.equalsIgnoreCase("htmlsafe")) {
for(int iCnt = 0; iCnt < strIn.length(); iCnt++) {
cTemp = strIn.charAt(iCnt);
switch(cTemp) {
case '<':
strTemp += "<";
break;
case '>':
strTemp += ">";
break;
default:
strTemp += cTemp;
break;
}
}
return strTemp;
}
// None
return strIn;
}
}
--- DATA.SITE_MANAGER ---
package jPublish.Data;
public class site_manager extends manager {
// Constructors
////////////////////////////////////////////////////////////
public site_manager() {
super();
super.setTable("sites");
}
// Methods
/////////////////////////////////////////////////////////////////
public boolean fill() {
site_data dataNew = new site_data();
try {
dataNew.setID(sqlResults.getLong("id"));
dataNew.setDesign(sqlResults.getLong("design"));
dataNew.setTitle(sqlResults.getString("title"));
dataNew.setWebmaster(sqlResults.getString("webmaster"));
dataNew.setEmail(sqlResults.getString("email"));
dataNew.setCopyright(sqlResults.getString("copyright"));
dataNew.setLogo(sqlResults.getString("logo"));
dataNew.setManager((manager) this);
dataNew.setLoaded();
objData = (data) dataNew;
return true;
}
catch (Exception e) {
strError = "Exception error: " + e;
}
return false;
}
}
--- DATA.SITE_DATA ---
package jPublish.Data;
public class site_data extends data {
// Data Menebers
///////////////////////////////////////////////////////////
private long lDesign;
private String strTitle;
private String strWebmaster;
private String strEmail;
private String strCopyright;
private String strLogo;
// Child Relationships
private section_manager objSections;
// Parent Relationships
private design_manager objDesigns;
// Constructors
////////////////////////////////////////////////////////////
public site_data() { super(); }
// Properties
//////////////////////////////////////////////////////////////
public boolean setDesign(long lNew) {
if(lNew > 0) {
lDesign = lNew;
objUpdates.set("design", Long.toString(lNew));
return true;
}
return false;
}
public boolean setTitle(String strNew) {
if(strNew.length() > 0) {
strTitle = strNew;
objUpdates.set("title", strNew);
return true;
}
return false;
}
public boolean setWebmaster(String strNew) {
if(strNew.length() > 0) {
strWebmaster = strNew;
objUpdates.set("webmaster", strNew);
return true;
}
return false;
}
public boolean setEmail(String strNew) {
if(strNew.length() > 0) {
strEmail = strNew;
objUpdates.set("email", strNew);
return true;
}
return false;
}
public boolean setCopyright(String strNew) {
if(strNew.length() > 0) {
strCopyright = strNew;
objUpdates.set("copyright", strNew);
return true;
}
return false;
}
public boolean setLogo(String strNew) {
if(strNew.length() > 0) {
strLogo = strNew;
objUpdates.set("logo", strNew);
return true;
}
return false;
}
public long getDesign() { return lDesign; }
public String getTitle() { return strTitle; }
public String getWebmaster() { return strWebmaster; }
public String getEmail() { return strEmail; }
public String getCopyright() { return strCopyright; }
public String getLogo() { return strLogo; }
// Child Relationships
public section_manager getSections() {
if(!(objSections instanceof section_manager)) {
objSections = new section_manager();
objSections.setWhere("site = " + this.getID());
objSections.load();
}
return objSections;
}
// Parent Relationships
public design_manager getParentDesign() {
if(!(objDesigns instanceof design_manager)) {
objDesigns = new design_manager();
objDesigns.setWhere("site = " + this.getDesign());
objDesigns.load();
}
return objDesigns;
}
}
--- DATA.MANAGER ---
package jPublish.Data;
import java.sql.*;
public abstract class manager extends Object {
// Data Members
////////////////////////////////////////////////////////////
protected data objData;
protected String strError = new String();
// SQL Options
private String strTable = new String();
private String strWhere = new String();
// Data SQL Connection
protected Connection sqlConnection;
protected Statement sqlStatement;
protected ResultSet sqlResults;
// Constructors
////////////////////////////////////////////////////////////
manager() {
System.out.println("jPublish.Data.manager()");
try {
Class.forName("com.mysql.jdbc.Driver").newInstance();
sqlConnection = DriverManager.getConnection(
"jdbc:mysql://localhost/jPublish", "root", "");
sqlStatement = sqlConnection.createStatement(
ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_UPDATABLE);
}
catch (Exception e) {
strError = "Execption error: " + e;
}
}
// Properties
//////////////////////////////////////////////////////////////
public boolean setTable(String strNew) {
if((strNew instanceof String) && (strNew.length() > 0)) {
strTable = strNew;
return true;
} else
return false;
}
public boolean setWhere(String strNew) {
if((strNew instanceof String) && (strNew.length() > 0)) {
if(strWhere.length() > 0)
strWhere += " AND " + strNew;
else
strWhere = strNew;
return true;
} else
return false;
}
public data getData() { return objData; }
public String getError() { return strError; }
public String getTable() { return strTable; }
public String getWhere() { return strWhere; }
public int getCount() {
int iCurr = -1;
int iLast = -1;
try {
iCurr = sqlResults.getRow();
sqlResults.last();
iLast = sqlResults.getRow();
sqlResults.absolute(iCurr);
}
catch (Exception e) { strError = "Exception Error: " + e; }
return iLast;
}
// Methods
/////////////////////////////////////////////////////////////////
public boolean load() {
String strQuery = "";
System.out.println("jPublish.Data.manager.load()");
// Build the Query
strQuery = strQuery + "SELECT * ";
strQuery = strQuery + " FROM " + strTable;
if(strWhere.length() > 0)
strQuery = strQuery + " WHERE " + strWhere;
// Get Results
try {
sqlResults = sqlStatement.executeQuery(strQuery);
}
// Get Errors
catch (Exception e) {
strError = "Exception error: " + e;
return false;
}
return true;
}
public boolean loadFrom(String strTable, String strColumn) {
String strQuery = "";
// Build the Query
strQuery = strQuery + "SELECT " + this.strTable + ".* ";
strQuery = strQuery + " FROM " + strTable + ", " + this.strTable;
strQuery = strQuery + " WHERE " + strTable + "." + strColumn;
strQuery = strQuery + " = " + this.strTable + ".id;";
// Get Results
try {
sqlResults = sqlStatement.executeQuery(strQuery);
}
// Get Errors
catch (Exception e) {
strError = "Exception error: " + e;
return false;
}
return true;
}
public boolean next() {
try { return sqlResults.next(); }
catch (Exception e) {
strError = "Exception error: " + e;
return false;
}
}
public boolean save() {
// Create Varibles
updates objUpdates = objData.getUpdates();
Object[] arrKeys = objUpdates.getKeys();
try {
// Update Record
for(int iCnt = 0; iCnt < arrKeys.length; iCnt++)
sqlResults.updateString(arrKeys[iCnt].toString(),
objUpdates.get(arrKeys[iCnt].toString()));
// Write Changes
if(objData.getID() > 0)
sqlResults.updateRow();
else
sqlResults.insertRow();
}
// Update Errors
catch (Exception e) {
// Set Error
strError = "Exception error: " + e;
return false;
}
return true;
}
// Abstract Functions
//////////////////////////////////////////////////////
// These must be implimented since the extended object only know the
tables.
public abstract boolean fill();
}
--- DATA.MANAGER ---
package jPublish.Data;
import java.sql.*;
public abstract class manager extends Object {
// Data Members
////////////////////////////////////////////////////////////
protected data objData;
protected String strError = new String();
// SQL Options
private String strTable = new String();
private String strWhere = new String();
// Data SQL Connection
protected Connection sqlConnection;
protected Statement sqlStatement;
protected ResultSet sqlResults;
// Constructors
////////////////////////////////////////////////////////////
manager() {
System.out.println("jPublish.Data.manager()");
try {
Class.forName("com.mysql.jdbc.Driver").newInstance();
sqlConnection = DriverManager.getConnection(
"jdbc:mysql://localhost/jPublish", "root", "");
sqlStatement = sqlConnection.createStatement(
ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_UPDATABLE);
}
catch (Exception e) {
strError = "Execption error: " + e;
}
}
// Properties
//////////////////////////////////////////////////////////////
public boolean setTable(String strNew) {
if((strNew instanceof String) && (strNew.length() > 0)) {
strTable = strNew;
return true;
} else
return false;
}
public boolean setWhere(String strNew) {
if((strNew instanceof String) && (strNew.length() > 0)) {
if(strWhere.length() > 0)
strWhere += " AND " + strNew;
else
strWhere = strNew;
return true;
} else
return false;
}
public data getData() { return objData; }
public String getError() { return strError; }
public String getTable() { return strTable; }
public String getWhere() { return strWhere; }
public int getCount() {
int iCurr = -1;
int iLast = -1;
try {
iCurr = sqlResults.getRow();
sqlResults.last();
iLast = sqlResults.getRow();
sqlResults.absolute(iCurr);
}
catch (Exception e) { strError = "Exception Error: " + e; }
return iLast;
}
// Methods
/////////////////////////////////////////////////////////////////
public boolean load() {
String strQuery = "";
System.out.println("jPublish.Data.manager.load()");
// Build the Query
strQuery = strQuery + "SELECT * ";
strQuery = strQuery + " FROM " + strTable;
if(strWhere.length() > 0)
strQuery = strQuery + " WHERE " + strWhere;
// Get Results
try {
sqlResults = sqlStatement.executeQuery(strQuery);
}
// Get Errors
catch (Exception e) {
strError = "Exception error: " + e;
return false;
}
return true;
}
public boolean loadFrom(String strTable, String strColumn) {
String strQuery = "";
// Build the Query
strQuery = strQuery + "SELECT " + this.strTable + ".* ";
strQuery = strQuery + " FROM " + strTable + ", " + this.strTable;
strQuery = strQuery + " WHERE " + strTable + "." + strColumn;
strQuery = strQuery + " = " + this.strTable + ".id;";
// Get Results
try {
sqlResults = sqlStatement.executeQuery(strQuery);
}
// Get Errors
catch (Exception e) {
strError = "Exception error: " + e;
return false;
}
return true;
}
public boolean next() {
try { return sqlResults.next(); }
catch (Exception e) {
strError = "Exception error: " + e;
return false;
}
}
public boolean save() {
// Create Varibles
updates objUpdates = objData.getUpdates();
Object[] arrKeys = objUpdates.getKeys();
try {
// Update Record
for(int iCnt = 0; iCnt < arrKeys.length; iCnt++)
sqlResults.updateString(arrKeys[iCnt].toString(),
objUpdates.get(arrKeys[iCnt].toString()));
// Write Changes
if(objData.getID() > 0)
sqlResults.updateRow();
else
sqlResults.insertRow();
}
// Update Errors
catch (Exception e) {
// Set Error
strError = "Exception error: " + e;
return false;
}
return true;
}
// Abstract Functions
//////////////////////////////////////////////////////
// These must be implimented since the extended object only know the
tables.
public abstract boolean fill();
}
--- DATA.DATA ---
package jPublish.Data;
public abstract class data extends Object {
// Data Menebers
///////////////////////////////////////////////////////////
protected manager objManager;
// Update Tracking
protected updates objUpdates;
// Data
protected long lID;
// Constructors
////////////////////////////////////////////////////////////
data () {
objUpdates = new updates();
}
// Properties
//////////////////////////////////////////////////////////////
public boolean setManager(manager manNew) {
if(manNew != null) {
objManager = manNew;
return true;
}
return false;
}
public boolean setLoaded() { return objUpdates.setUpdated(); }
public manager getManager() { return objManager; }
public updates getUpdates() { return objUpdates; }
// Data Properties
public boolean setID(long lNew) {
if(lNew > 0) {
lID = lNew;
objUpdates.set("id", Long.toString(lNew));
return true;
}
return false;
}
public long getID() { return lID; }
}
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RE: Custom Tag Lib
Posted by Shawn Zernik <sz...@internetworkconsulting.net>.
Mike:
Thanks sooooo very much... I saw their is a config option in the Jasper to
turn off tag pooling. do you thing that would work too, of shouldI
impliment it in my source code. I'm gonna take a look at it right now.
Shawn
-----Original Message-----
From: Mike Cherichetti (Renegade Internet)
[mailto:mike@renegadeinternet.com]
Sent: Thursday, August 07, 2003 10:28 PM
To: Tomcat Users List
Subject: RE: Custom Tag Lib
Shawn,
I ran into this problem as well when switching from 4.0 to 4.1. I think it
has something to do with 4.1 pooling and re-using tag objects. What I did
in all of my doStartTag(), doAfterBody(), etc... methods was manually call
release() to reset the data in the tags like so:
public int doStartTag() throws JspException
{
try
{
...
}
catch (Exception exception)
{
throw new JspException(exception);
}
finally
{
release();
}
return SKIP_BODY;
}
Have a nice day ...
Sincerely,
Mike Cherichetti
Renegade Internet
Internet Advertising Delivery Solutions
www.renegadeinternet.com
Phone (724) 658-6346
Fax (724) 658-6346
-----Original Message-----
From: Shawn Zernik [mailto:szernik@internetworkconsulting.net]
Sent: Thursday, August 07, 2003 10:56 PM
To: tomcat-user@jakarta.apache.org
Subject: Custom Tag Lib
Tomcat Users:
I've been fighting with some version differences in tom cat wondering why my
app acts severly different on Tomcat 4.1.27 then 4.0.6. It appears that
4.1.27 is not working from my perspective, and have been fighting with it
since monday. None of the books I have touch this subject or ellude to the
problem, and I've seached high and low for solutions.
I'm having a problem working with my custom tag library. The stange part to
this is it appears to work on tomcat 4.0.6 but not on 4.1.27. The library
has a tage called site that extends a base tag, and those tags use other
classes in my data namespace to hit a database.
The tags are returning the proper data in both versions, but in 4.1.27, I
have to "reload" the contect in the manager for it to "register" the changes
from the database. I have added some printlns to std out to track what's
going on. In tomcat 4.0.6 they are going through all the code as I would
exspect it to. I have included each of the class files that are called. I
have also included the printouts from both versions of tomcat to clierify
how each version is handling the calls.
The object hiarchey goes as follows:
jPublish.Tags site extends inc_tag.
jPublish.Data.site_manager extends jPublish.Data.manager, managers contain,
load, and fill datas.
jPublish.Data.site_data extends jPublish.Data.data, used for storing data
and tracking updates.
--- INDEX.JSP ---
<%@ page contentType="text/html" %>
<%@ taglib prefix="inc" uri="inc" %>
<inc:site site="1" action="none"/>
<html>
<head><title><inc:site action="title" /></title></head>
<body>
<h1>Welcome to <inc:site action="title"/>!</h1>
© <inc:site action="copyright"/>
</body>
</html>
--- TOMCAT 4.0.6 STDOUT ---
Starting service Tomcat-Standalone
Apache Tomcat/4.0.6
Starting service Tomcat-Apache
Apache Tomcat/4.0.6
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.setSite()
jPublish.Data.manager()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
Shawn
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.setSite()
jPublish.Data.manager()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
INC
jPublish.Tags.site.doEndTag(): End
--- TOMCAT 4.1.27 STDOUT: db INC then Shawn ---
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.setSite()
jPublish.Data.manager()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.site.loaded()
INC
jPublish.Tags.site.doEndTag(): End
<Change INC to Shawn in DB>
jPublish.Tags.site.setSite()
jPublish.Data.manager()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.site.doEndTag(): End
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.site.loaded()
INC
jPublish.Tags.site.doEndTag(): End
--- SITE TAG "inc:site" ---
package jPublish.Tags;
import jPublish.Data.*;
public class site extends inc_tag {
private site_data objSite;
// Constructors
////////////////////////////////////////////////////////////
public site() {
objManager = (manager) new site_manager();
System.out.println("jPublish.Tags.site()");
}
// Properties
//////////////////////////////////////////////////////////////
public void setSite(String strNew) {
System.out.println("jPublish.Tags.site.setSite()");
objManager = (manager) new site_manager();
objManager.setWhere("id = " + strNew);
}
// Methods
/////////////////////////////////////////////////////////////////
protected boolean loaded() {
if(super.loaded()) {
objSite = (site_data) objData;
System.out.println("jPublish.Tags.site.loaded()");
return true;
} else
return false;
}
public int doEndTag() {
System.out.println("jPublish.Tags.site.doEndTag(): Begin");
if(strAction.equalsIgnoreCase("id"))
if(loaded()) print(Long.toString(objSite.getID()));
if(strAction.equalsIgnoreCase("design"))
if(loaded()) print(Long.toString(objSite.getDesign()));
if(strAction.equalsIgnoreCase("title"))
if(loaded()) print(objSite.getTitle());
if(strAction.equalsIgnoreCase("webmaster"))
if(loaded()) print(objSite.getWebmaster());
if(strAction.equalsIgnoreCase("email"))
if(loaded()) print(objSite.getEmail());
if(strAction.equalsIgnoreCase("copyright"))
if(loaded()) print(objSite.getCopyright());
if(strAction.equalsIgnoreCase("logo"))
if(loaded()) print(objSite.getLogo());
if(strAction.equalsIgnoreCase("next"))
if(objManager.next()) return this.EVAL_BODY_AGAIN;
System.out.println("jPublish.Tags.site.doEndTag(): End");
return this.SKIP_BODY;
}
}
--- INC_TAG ---
package jPublish.Tags;
import jPublish.Data.*;
import javax.servlet.*;
import javax.servlet.jsp.*;
import javax.servlet.jsp.tagext.*;
public abstract class inc_tag extends TagSupport {
// Data Menebers
///////////////////////////////////////////////////////////
protected manager objManager;
protected data objData;
protected String strWhere;
// Action Data
protected String strAction = "none";
private String strOutput = "none";
// Properties
//////////////////////////////////////////////////////////////
public void setAction(String strNew) { strAction = strNew; }
public void setOutput(String strNew) { strOutput = strNew; }
public manager getManager() { return objManager; }
// Internal Methods
////////////////////////////////////////////////////////
protected boolean loaded() {
System.out.println("jPublish.Tags.inc_tag.loaded()");
if(!(objData instanceof data)) {
System.out.println("jPublish.Tags.inc_tag.loaded(): not instance");
if(objManager.load()) {
System.out.println("jPublish.Tags.inc_tag.loaded(): load ok");
if(objManager.next()) {
System.out.println("jPublish.Tags.inc_tag.loaded(): next ok");
if(objManager.fill()) {
System.out.println("jPublish.Tags.inc_tag.loaded(): reached fill.");
objData = objManager.getData();
return true;
} else
return false;
}
} else
return false;
}
// Data Exist: Loaded
return true;
}
protected void print(String strOut) {
JspWriter out = pageContext.getOut();
System.out.println(strOut);
try { out.print(format(strOut)); }
catch (Exception e) { System.out.println("Exception error: " + e); }
}
protected String format(String strIn) {
String strTemp = new String();
char cTemp;
// String Safe
if(strOutput.equalsIgnoreCase("stringsafe")) {
for(int iCnt = 0; iCnt < strIn.length(); iCnt++) {
cTemp = strIn.charAt(iCnt);
switch(cTemp) {
case '\'':
strTemp += "\\\'";
break;
case '\"':
strTemp += "\\\"";
break;
case '\\':
strTemp += "\\\\";
break;
default:
strTemp += cTemp;
break;
}
}
return strTemp;
}
// Strip String
if(strOutput.equalsIgnoreCase("stringsafe")) {
for(int iCnt = 0; iCnt < strIn.length(); iCnt++) {
cTemp = strIn.charAt(iCnt);
switch(cTemp) {
case '\'':
break;
case '\"':
break;
default:
strTemp += cTemp;
break;
}
}
return strTemp;
}
// HTML Safe
if(strOutput.equalsIgnoreCase("htmlsafe")) {
for(int iCnt = 0; iCnt < strIn.length(); iCnt++) {
cTemp = strIn.charAt(iCnt);
switch(cTemp) {
case '<':
strTemp += "<";
break;
case '>':
strTemp += ">";
break;
default:
strTemp += cTemp;
break;
}
}
return strTemp;
}
// None
return strIn;
}
}
--- DATA.SITE_MANAGER ---
package jPublish.Data;
public class site_manager extends manager {
// Constructors
////////////////////////////////////////////////////////////
public site_manager() {
super();
super.setTable("sites");
}
// Methods
/////////////////////////////////////////////////////////////////
public boolean fill() {
site_data dataNew = new site_data();
try {
dataNew.setID(sqlResults.getLong("id"));
dataNew.setDesign(sqlResults.getLong("design"));
dataNew.setTitle(sqlResults.getString("title"));
dataNew.setWebmaster(sqlResults.getString("webmaster"));
dataNew.setEmail(sqlResults.getString("email"));
dataNew.setCopyright(sqlResults.getString("copyright"));
dataNew.setLogo(sqlResults.getString("logo"));
dataNew.setManager((manager) this);
dataNew.setLoaded();
objData = (data) dataNew;
return true;
}
catch (Exception e) {
strError = "Exception error: " + e;
}
return false;
}
}
--- DATA.SITE_DATA ---
package jPublish.Data;
public class site_data extends data {
// Data Menebers
///////////////////////////////////////////////////////////
private long lDesign;
private String strTitle;
private String strWebmaster;
private String strEmail;
private String strCopyright;
private String strLogo;
// Child Relationships
private section_manager objSections;
// Parent Relationships
private design_manager objDesigns;
// Constructors
////////////////////////////////////////////////////////////
public site_data() { super(); }
// Properties
//////////////////////////////////////////////////////////////
public boolean setDesign(long lNew) {
if(lNew > 0) {
lDesign = lNew;
objUpdates.set("design", Long.toString(lNew));
return true;
}
return false;
}
public boolean setTitle(String strNew) {
if(strNew.length() > 0) {
strTitle = strNew;
objUpdates.set("title", strNew);
return true;
}
return false;
}
public boolean setWebmaster(String strNew) {
if(strNew.length() > 0) {
strWebmaster = strNew;
objUpdates.set("webmaster", strNew);
return true;
}
return false;
}
public boolean setEmail(String strNew) {
if(strNew.length() > 0) {
strEmail = strNew;
objUpdates.set("email", strNew);
return true;
}
return false;
}
public boolean setCopyright(String strNew) {
if(strNew.length() > 0) {
strCopyright = strNew;
objUpdates.set("copyright", strNew);
return true;
}
return false;
}
public boolean setLogo(String strNew) {
if(strNew.length() > 0) {
strLogo = strNew;
objUpdates.set("logo", strNew);
return true;
}
return false;
}
public long getDesign() { return lDesign; }
public String getTitle() { return strTitle; }
public String getWebmaster() { return strWebmaster; }
public String getEmail() { return strEmail; }
public String getCopyright() { return strCopyright; }
public String getLogo() { return strLogo; }
// Child Relationships
public section_manager getSections() {
if(!(objSections instanceof section_manager)) {
objSections = new section_manager();
objSections.setWhere("site = " + this.getID());
objSections.load();
}
return objSections;
}
// Parent Relationships
public design_manager getParentDesign() {
if(!(objDesigns instanceof design_manager)) {
objDesigns = new design_manager();
objDesigns.setWhere("site = " + this.getDesign());
objDesigns.load();
}
return objDesigns;
}
}
--- DATA.MANAGER ---
package jPublish.Data;
import java.sql.*;
public abstract class manager extends Object {
// Data Members
////////////////////////////////////////////////////////////
protected data objData;
protected String strError = new String();
// SQL Options
private String strTable = new String();
private String strWhere = new String();
// Data SQL Connection
protected Connection sqlConnection;
protected Statement sqlStatement;
protected ResultSet sqlResults;
// Constructors
////////////////////////////////////////////////////////////
manager() {
System.out.println("jPublish.Data.manager()");
try {
Class.forName("com.mysql.jdbc.Driver").newInstance();
sqlConnection = DriverManager.getConnection(
"jdbc:mysql://localhost/jPublish", "root", "");
sqlStatement = sqlConnection.createStatement(
ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_UPDATABLE);
}
catch (Exception e) {
strError = "Execption error: " + e;
}
}
// Properties
//////////////////////////////////////////////////////////////
public boolean setTable(String strNew) {
if((strNew instanceof String) && (strNew.length() > 0)) {
strTable = strNew;
return true;
} else
return false;
}
public boolean setWhere(String strNew) {
if((strNew instanceof String) && (strNew.length() > 0)) {
if(strWhere.length() > 0)
strWhere += " AND " + strNew;
else
strWhere = strNew;
return true;
} else
return false;
}
public data getData() { return objData; }
public String getError() { return strError; }
public String getTable() { return strTable; }
public String getWhere() { return strWhere; }
public int getCount() {
int iCurr = -1;
int iLast = -1;
try {
iCurr = sqlResults.getRow();
sqlResults.last();
iLast = sqlResults.getRow();
sqlResults.absolute(iCurr);
}
catch (Exception e) { strError = "Exception Error: " + e; }
return iLast;
}
// Methods
/////////////////////////////////////////////////////////////////
public boolean load() {
String strQuery = "";
System.out.println("jPublish.Data.manager.load()");
// Build the Query
strQuery = strQuery + "SELECT * ";
strQuery = strQuery + " FROM " + strTable;
if(strWhere.length() > 0)
strQuery = strQuery + " WHERE " + strWhere;
// Get Results
try {
sqlResults = sqlStatement.executeQuery(strQuery);
}
// Get Errors
catch (Exception e) {
strError = "Exception error: " + e;
return false;
}
return true;
}
public boolean loadFrom(String strTable, String strColumn) {
String strQuery = "";
// Build the Query
strQuery = strQuery + "SELECT " + this.strTable + ".* ";
strQuery = strQuery + " FROM " + strTable + ", " + this.strTable;
strQuery = strQuery + " WHERE " + strTable + "." + strColumn;
strQuery = strQuery + " = " + this.strTable + ".id;";
// Get Results
try {
sqlResults = sqlStatement.executeQuery(strQuery);
}
// Get Errors
catch (Exception e) {
strError = "Exception error: " + e;
return false;
}
return true;
}
public boolean next() {
try { return sqlResults.next(); }
catch (Exception e) {
strError = "Exception error: " + e;
return false;
}
}
public boolean save() {
// Create Varibles
updates objUpdates = objData.getUpdates();
Object[] arrKeys = objUpdates.getKeys();
try {
// Update Record
for(int iCnt = 0; iCnt < arrKeys.length; iCnt++)
sqlResults.updateString(arrKeys[iCnt].toString(),
objUpdates.get(arrKeys[iCnt].toString()));
// Write Changes
if(objData.getID() > 0)
sqlResults.updateRow();
else
sqlResults.insertRow();
}
// Update Errors
catch (Exception e) {
// Set Error
strError = "Exception error: " + e;
return false;
}
return true;
}
// Abstract Functions
//////////////////////////////////////////////////////
// These must be implimented since the extended object only know the
tables.
public abstract boolean fill();
}
--- DATA.MANAGER ---
package jPublish.Data;
import java.sql.*;
public abstract class manager extends Object {
// Data Members
////////////////////////////////////////////////////////////
protected data objData;
protected String strError = new String();
// SQL Options
private String strTable = new String();
private String strWhere = new String();
// Data SQL Connection
protected Connection sqlConnection;
protected Statement sqlStatement;
protected ResultSet sqlResults;
// Constructors
////////////////////////////////////////////////////////////
manager() {
System.out.println("jPublish.Data.manager()");
try {
Class.forName("com.mysql.jdbc.Driver").newInstance();
sqlConnection = DriverManager.getConnection(
"jdbc:mysql://localhost/jPublish", "root", "");
sqlStatement = sqlConnection.createStatement(
ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_UPDATABLE);
}
catch (Exception e) {
strError = "Execption error: " + e;
}
}
// Properties
//////////////////////////////////////////////////////////////
public boolean setTable(String strNew) {
if((strNew instanceof String) && (strNew.length() > 0)) {
strTable = strNew;
return true;
} else
return false;
}
public boolean setWhere(String strNew) {
if((strNew instanceof String) && (strNew.length() > 0)) {
if(strWhere.length() > 0)
strWhere += " AND " + strNew;
else
strWhere = strNew;
return true;
} else
return false;
}
public data getData() { return objData; }
public String getError() { return strError; }
public String getTable() { return strTable; }
public String getWhere() { return strWhere; }
public int getCount() {
int iCurr = -1;
int iLast = -1;
try {
iCurr = sqlResults.getRow();
sqlResults.last();
iLast = sqlResults.getRow();
sqlResults.absolute(iCurr);
}
catch (Exception e) { strError = "Exception Error: " + e; }
return iLast;
}
// Methods
/////////////////////////////////////////////////////////////////
public boolean load() {
String strQuery = "";
System.out.println("jPublish.Data.manager.load()");
// Build the Query
strQuery = strQuery + "SELECT * ";
strQuery = strQuery + " FROM " + strTable;
if(strWhere.length() > 0)
strQuery = strQuery + " WHERE " + strWhere;
// Get Results
try {
sqlResults = sqlStatement.executeQuery(strQuery);
}
// Get Errors
catch (Exception e) {
strError = "Exception error: " + e;
return false;
}
return true;
}
public boolean loadFrom(String strTable, String strColumn) {
String strQuery = "";
// Build the Query
strQuery = strQuery + "SELECT " + this.strTable + ".* ";
strQuery = strQuery + " FROM " + strTable + ", " + this.strTable;
strQuery = strQuery + " WHERE " + strTable + "." + strColumn;
strQuery = strQuery + " = " + this.strTable + ".id;";
// Get Results
try {
sqlResults = sqlStatement.executeQuery(strQuery);
}
// Get Errors
catch (Exception e) {
strError = "Exception error: " + e;
return false;
}
return true;
}
public boolean next() {
try { return sqlResults.next(); }
catch (Exception e) {
strError = "Exception error: " + e;
return false;
}
}
public boolean save() {
// Create Varibles
updates objUpdates = objData.getUpdates();
Object[] arrKeys = objUpdates.getKeys();
try {
// Update Record
for(int iCnt = 0; iCnt < arrKeys.length; iCnt++)
sqlResults.updateString(arrKeys[iCnt].toString(),
objUpdates.get(arrKeys[iCnt].toString()));
// Write Changes
if(objData.getID() > 0)
sqlResults.updateRow();
else
sqlResults.insertRow();
}
// Update Errors
catch (Exception e) {
// Set Error
strError = "Exception error: " + e;
return false;
}
return true;
}
// Abstract Functions
//////////////////////////////////////////////////////
// These must be implimented since the extended object only know the
tables.
public abstract boolean fill();
}
--- DATA.DATA ---
package jPublish.Data;
public abstract class data extends Object {
// Data Menebers
///////////////////////////////////////////////////////////
protected manager objManager;
// Update Tracking
protected updates objUpdates;
// Data
protected long lID;
// Constructors
////////////////////////////////////////////////////////////
data () {
objUpdates = new updates();
}
// Properties
//////////////////////////////////////////////////////////////
public boolean setManager(manager manNew) {
if(manNew != null) {
objManager = manNew;
return true;
}
return false;
}
public boolean setLoaded() { return objUpdates.setUpdated(); }
public manager getManager() { return objManager; }
public updates getUpdates() { return objUpdates; }
// Data Properties
public boolean setID(long lNew) {
if(lNew > 0) {
lID = lNew;
objUpdates.set("id", Long.toString(lNew));
return true;
}
return false;
}
public long getID() { return lID; }
}
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RE: Custom Tag Lib
Posted by Shawn Zernik <sz...@internetworkconsulting.net>.
Mike:
Thanks sooooo very much... I saw their is a config option in the Jasper to
turn off tag pooling. do you thing that would work too, of shouldI
impliment it in my source code. I'm gonna take a look at it right now.
Shawn
-----Original Message-----
From: Mike Cherichetti (Renegade Internet)
[mailto:mike@renegadeinternet.com]
Sent: Thursday, August 07, 2003 10:28 PM
To: Tomcat Users List
Subject: RE: Custom Tag Lib
Shawn,
I ran into this problem as well when switching from 4.0 to 4.1. I think it
has something to do with 4.1 pooling and re-using tag objects. What I did
in all of my doStartTag(), doAfterBody(), etc... methods was manually call
release() to reset the data in the tags like so:
public int doStartTag() throws JspException
{
try
{
...
}
catch (Exception exception)
{
throw new JspException(exception);
}
finally
{
release();
}
return SKIP_BODY;
}
Have a nice day ...
Sincerely,
Mike Cherichetti
Renegade Internet
Internet Advertising Delivery Solutions
www.renegadeinternet.com
Phone (724) 658-6346
Fax (724) 658-6346
-----Original Message-----
From: Shawn Zernik [mailto:szernik@internetworkconsulting.net]
Sent: Thursday, August 07, 2003 10:56 PM
To: tomcat-user@jakarta.apache.org
Subject: Custom Tag Lib
Tomcat Users:
I've been fighting with some version differences in tom cat wondering why my
app acts severly different on Tomcat 4.1.27 then 4.0.6. It appears that
4.1.27 is not working from my perspective, and have been fighting with it
since monday. None of the books I have touch this subject or ellude to the
problem, and I've seached high and low for solutions.
I'm having a problem working with my custom tag library. The stange part to
this is it appears to work on tomcat 4.0.6 but not on 4.1.27. The library
has a tage called site that extends a base tag, and those tags use other
classes in my data namespace to hit a database.
The tags are returning the proper data in both versions, but in 4.1.27, I
have to "reload" the contect in the manager for it to "register" the changes
from the database. I have added some printlns to std out to track what's
going on. In tomcat 4.0.6 they are going through all the code as I would
exspect it to. I have included each of the class files that are called. I
have also included the printouts from both versions of tomcat to clierify
how each version is handling the calls.
The object hiarchey goes as follows:
jPublish.Tags site extends inc_tag.
jPublish.Data.site_manager extends jPublish.Data.manager, managers contain,
load, and fill datas.
jPublish.Data.site_data extends jPublish.Data.data, used for storing data
and tracking updates.
--- INDEX.JSP ---
<%@ page contentType="text/html" %>
<%@ taglib prefix="inc" uri="inc" %>
<inc:site site="1" action="none"/>
<html>
<head><title><inc:site action="title" /></title></head>
<body>
<h1>Welcome to <inc:site action="title"/>!</h1>
© <inc:site action="copyright"/>
</body>
</html>
--- TOMCAT 4.0.6 STDOUT ---
Starting service Tomcat-Standalone
Apache Tomcat/4.0.6
Starting service Tomcat-Apache
Apache Tomcat/4.0.6
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.setSite()
jPublish.Data.manager()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
Shawn
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.setSite()
jPublish.Data.manager()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
INC
jPublish.Tags.site.doEndTag(): End
--- TOMCAT 4.1.27 STDOUT: db INC then Shawn ---
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.setSite()
jPublish.Data.manager()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.site.loaded()
INC
jPublish.Tags.site.doEndTag(): End
<Change INC to Shawn in DB>
jPublish.Tags.site.setSite()
jPublish.Data.manager()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.site.doEndTag(): End
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.site.loaded()
INC
jPublish.Tags.site.doEndTag(): End
--- SITE TAG "inc:site" ---
package jPublish.Tags;
import jPublish.Data.*;
public class site extends inc_tag {
private site_data objSite;
// Constructors
////////////////////////////////////////////////////////////
public site() {
objManager = (manager) new site_manager();
System.out.println("jPublish.Tags.site()");
}
// Properties
//////////////////////////////////////////////////////////////
public void setSite(String strNew) {
System.out.println("jPublish.Tags.site.setSite()");
objManager = (manager) new site_manager();
objManager.setWhere("id = " + strNew);
}
// Methods
/////////////////////////////////////////////////////////////////
protected boolean loaded() {
if(super.loaded()) {
objSite = (site_data) objData;
System.out.println("jPublish.Tags.site.loaded()");
return true;
} else
return false;
}
public int doEndTag() {
System.out.println("jPublish.Tags.site.doEndTag(): Begin");
if(strAction.equalsIgnoreCase("id"))
if(loaded()) print(Long.toString(objSite.getID()));
if(strAction.equalsIgnoreCase("design"))
if(loaded()) print(Long.toString(objSite.getDesign()));
if(strAction.equalsIgnoreCase("title"))
if(loaded()) print(objSite.getTitle());
if(strAction.equalsIgnoreCase("webmaster"))
if(loaded()) print(objSite.getWebmaster());
if(strAction.equalsIgnoreCase("email"))
if(loaded()) print(objSite.getEmail());
if(strAction.equalsIgnoreCase("copyright"))
if(loaded()) print(objSite.getCopyright());
if(strAction.equalsIgnoreCase("logo"))
if(loaded()) print(objSite.getLogo());
if(strAction.equalsIgnoreCase("next"))
if(objManager.next()) return this.EVAL_BODY_AGAIN;
System.out.println("jPublish.Tags.site.doEndTag(): End");
return this.SKIP_BODY;
}
}
--- INC_TAG ---
package jPublish.Tags;
import jPublish.Data.*;
import javax.servlet.*;
import javax.servlet.jsp.*;
import javax.servlet.jsp.tagext.*;
public abstract class inc_tag extends TagSupport {
// Data Menebers
///////////////////////////////////////////////////////////
protected manager objManager;
protected data objData;
protected String strWhere;
// Action Data
protected String strAction = "none";
private String strOutput = "none";
// Properties
//////////////////////////////////////////////////////////////
public void setAction(String strNew) { strAction = strNew; }
public void setOutput(String strNew) { strOutput = strNew; }
public manager getManager() { return objManager; }
// Internal Methods
////////////////////////////////////////////////////////
protected boolean loaded() {
System.out.println("jPublish.Tags.inc_tag.loaded()");
if(!(objData instanceof data)) {
System.out.println("jPublish.Tags.inc_tag.loaded(): not instance");
if(objManager.load()) {
System.out.println("jPublish.Tags.inc_tag.loaded(): load ok");
if(objManager.next()) {
System.out.println("jPublish.Tags.inc_tag.loaded(): next ok");
if(objManager.fill()) {
System.out.println("jPublish.Tags.inc_tag.loaded(): reached fill.");
objData = objManager.getData();
return true;
} else
return false;
}
} else
return false;
}
// Data Exist: Loaded
return true;
}
protected void print(String strOut) {
JspWriter out = pageContext.getOut();
System.out.println(strOut);
try { out.print(format(strOut)); }
catch (Exception e) { System.out.println("Exception error: " + e); }
}
protected String format(String strIn) {
String strTemp = new String();
char cTemp;
// String Safe
if(strOutput.equalsIgnoreCase("stringsafe")) {
for(int iCnt = 0; iCnt < strIn.length(); iCnt++) {
cTemp = strIn.charAt(iCnt);
switch(cTemp) {
case '\'':
strTemp += "\\\'";
break;
case '\"':
strTemp += "\\\"";
break;
case '\\':
strTemp += "\\\\";
break;
default:
strTemp += cTemp;
break;
}
}
return strTemp;
}
// Strip String
if(strOutput.equalsIgnoreCase("stringsafe")) {
for(int iCnt = 0; iCnt < strIn.length(); iCnt++) {
cTemp = strIn.charAt(iCnt);
switch(cTemp) {
case '\'':
break;
case '\"':
break;
default:
strTemp += cTemp;
break;
}
}
return strTemp;
}
// HTML Safe
if(strOutput.equalsIgnoreCase("htmlsafe")) {
for(int iCnt = 0; iCnt < strIn.length(); iCnt++) {
cTemp = strIn.charAt(iCnt);
switch(cTemp) {
case '<':
strTemp += "<";
break;
case '>':
strTemp += ">";
break;
default:
strTemp += cTemp;
break;
}
}
return strTemp;
}
// None
return strIn;
}
}
--- DATA.SITE_MANAGER ---
package jPublish.Data;
public class site_manager extends manager {
// Constructors
////////////////////////////////////////////////////////////
public site_manager() {
super();
super.setTable("sites");
}
// Methods
/////////////////////////////////////////////////////////////////
public boolean fill() {
site_data dataNew = new site_data();
try {
dataNew.setID(sqlResults.getLong("id"));
dataNew.setDesign(sqlResults.getLong("design"));
dataNew.setTitle(sqlResults.getString("title"));
dataNew.setWebmaster(sqlResults.getString("webmaster"));
dataNew.setEmail(sqlResults.getString("email"));
dataNew.setCopyright(sqlResults.getString("copyright"));
dataNew.setLogo(sqlResults.getString("logo"));
dataNew.setManager((manager) this);
dataNew.setLoaded();
objData = (data) dataNew;
return true;
}
catch (Exception e) {
strError = "Exception error: " + e;
}
return false;
}
}
--- DATA.SITE_DATA ---
package jPublish.Data;
public class site_data extends data {
// Data Menebers
///////////////////////////////////////////////////////////
private long lDesign;
private String strTitle;
private String strWebmaster;
private String strEmail;
private String strCopyright;
private String strLogo;
// Child Relationships
private section_manager objSections;
// Parent Relationships
private design_manager objDesigns;
// Constructors
////////////////////////////////////////////////////////////
public site_data() { super(); }
// Properties
//////////////////////////////////////////////////////////////
public boolean setDesign(long lNew) {
if(lNew > 0) {
lDesign = lNew;
objUpdates.set("design", Long.toString(lNew));
return true;
}
return false;
}
public boolean setTitle(String strNew) {
if(strNew.length() > 0) {
strTitle = strNew;
objUpdates.set("title", strNew);
return true;
}
return false;
}
public boolean setWebmaster(String strNew) {
if(strNew.length() > 0) {
strWebmaster = strNew;
objUpdates.set("webmaster", strNew);
return true;
}
return false;
}
public boolean setEmail(String strNew) {
if(strNew.length() > 0) {
strEmail = strNew;
objUpdates.set("email", strNew);
return true;
}
return false;
}
public boolean setCopyright(String strNew) {
if(strNew.length() > 0) {
strCopyright = strNew;
objUpdates.set("copyright", strNew);
return true;
}
return false;
}
public boolean setLogo(String strNew) {
if(strNew.length() > 0) {
strLogo = strNew;
objUpdates.set("logo", strNew);
return true;
}
return false;
}
public long getDesign() { return lDesign; }
public String getTitle() { return strTitle; }
public String getWebmaster() { return strWebmaster; }
public String getEmail() { return strEmail; }
public String getCopyright() { return strCopyright; }
public String getLogo() { return strLogo; }
// Child Relationships
public section_manager getSections() {
if(!(objSections instanceof section_manager)) {
objSections = new section_manager();
objSections.setWhere("site = " + this.getID());
objSections.load();
}
return objSections;
}
// Parent Relationships
public design_manager getParentDesign() {
if(!(objDesigns instanceof design_manager)) {
objDesigns = new design_manager();
objDesigns.setWhere("site = " + this.getDesign());
objDesigns.load();
}
return objDesigns;
}
}
--- DATA.MANAGER ---
package jPublish.Data;
import java.sql.*;
public abstract class manager extends Object {
// Data Members
////////////////////////////////////////////////////////////
protected data objData;
protected String strError = new String();
// SQL Options
private String strTable = new String();
private String strWhere = new String();
// Data SQL Connection
protected Connection sqlConnection;
protected Statement sqlStatement;
protected ResultSet sqlResults;
// Constructors
////////////////////////////////////////////////////////////
manager() {
System.out.println("jPublish.Data.manager()");
try {
Class.forName("com.mysql.jdbc.Driver").newInstance();
sqlConnection = DriverManager.getConnection(
"jdbc:mysql://localhost/jPublish", "root", "");
sqlStatement = sqlConnection.createStatement(
ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_UPDATABLE);
}
catch (Exception e) {
strError = "Execption error: " + e;
}
}
// Properties
//////////////////////////////////////////////////////////////
public boolean setTable(String strNew) {
if((strNew instanceof String) && (strNew.length() > 0)) {
strTable = strNew;
return true;
} else
return false;
}
public boolean setWhere(String strNew) {
if((strNew instanceof String) && (strNew.length() > 0)) {
if(strWhere.length() > 0)
strWhere += " AND " + strNew;
else
strWhere = strNew;
return true;
} else
return false;
}
public data getData() { return objData; }
public String getError() { return strError; }
public String getTable() { return strTable; }
public String getWhere() { return strWhere; }
public int getCount() {
int iCurr = -1;
int iLast = -1;
try {
iCurr = sqlResults.getRow();
sqlResults.last();
iLast = sqlResults.getRow();
sqlResults.absolute(iCurr);
}
catch (Exception e) { strError = "Exception Error: " + e; }
return iLast;
}
// Methods
/////////////////////////////////////////////////////////////////
public boolean load() {
String strQuery = "";
System.out.println("jPublish.Data.manager.load()");
// Build the Query
strQuery = strQuery + "SELECT * ";
strQuery = strQuery + " FROM " + strTable;
if(strWhere.length() > 0)
strQuery = strQuery + " WHERE " + strWhere;
// Get Results
try {
sqlResults = sqlStatement.executeQuery(strQuery);
}
// Get Errors
catch (Exception e) {
strError = "Exception error: " + e;
return false;
}
return true;
}
public boolean loadFrom(String strTable, String strColumn) {
String strQuery = "";
// Build the Query
strQuery = strQuery + "SELECT " + this.strTable + ".* ";
strQuery = strQuery + " FROM " + strTable + ", " + this.strTable;
strQuery = strQuery + " WHERE " + strTable + "." + strColumn;
strQuery = strQuery + " = " + this.strTable + ".id;";
// Get Results
try {
sqlResults = sqlStatement.executeQuery(strQuery);
}
// Get Errors
catch (Exception e) {
strError = "Exception error: " + e;
return false;
}
return true;
}
public boolean next() {
try { return sqlResults.next(); }
catch (Exception e) {
strError = "Exception error: " + e;
return false;
}
}
public boolean save() {
// Create Varibles
updates objUpdates = objData.getUpdates();
Object[] arrKeys = objUpdates.getKeys();
try {
// Update Record
for(int iCnt = 0; iCnt < arrKeys.length; iCnt++)
sqlResults.updateString(arrKeys[iCnt].toString(),
objUpdates.get(arrKeys[iCnt].toString()));
// Write Changes
if(objData.getID() > 0)
sqlResults.updateRow();
else
sqlResults.insertRow();
}
// Update Errors
catch (Exception e) {
// Set Error
strError = "Exception error: " + e;
return false;
}
return true;
}
// Abstract Functions
//////////////////////////////////////////////////////
// These must be implimented since the extended object only know the
tables.
public abstract boolean fill();
}
--- DATA.MANAGER ---
package jPublish.Data;
import java.sql.*;
public abstract class manager extends Object {
// Data Members
////////////////////////////////////////////////////////////
protected data objData;
protected String strError = new String();
// SQL Options
private String strTable = new String();
private String strWhere = new String();
// Data SQL Connection
protected Connection sqlConnection;
protected Statement sqlStatement;
protected ResultSet sqlResults;
// Constructors
////////////////////////////////////////////////////////////
manager() {
System.out.println("jPublish.Data.manager()");
try {
Class.forName("com.mysql.jdbc.Driver").newInstance();
sqlConnection = DriverManager.getConnection(
"jdbc:mysql://localhost/jPublish", "root", "");
sqlStatement = sqlConnection.createStatement(
ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_UPDATABLE);
}
catch (Exception e) {
strError = "Execption error: " + e;
}
}
// Properties
//////////////////////////////////////////////////////////////
public boolean setTable(String strNew) {
if((strNew instanceof String) && (strNew.length() > 0)) {
strTable = strNew;
return true;
} else
return false;
}
public boolean setWhere(String strNew) {
if((strNew instanceof String) && (strNew.length() > 0)) {
if(strWhere.length() > 0)
strWhere += " AND " + strNew;
else
strWhere = strNew;
return true;
} else
return false;
}
public data getData() { return objData; }
public String getError() { return strError; }
public String getTable() { return strTable; }
public String getWhere() { return strWhere; }
public int getCount() {
int iCurr = -1;
int iLast = -1;
try {
iCurr = sqlResults.getRow();
sqlResults.last();
iLast = sqlResults.getRow();
sqlResults.absolute(iCurr);
}
catch (Exception e) { strError = "Exception Error: " + e; }
return iLast;
}
// Methods
/////////////////////////////////////////////////////////////////
public boolean load() {
String strQuery = "";
System.out.println("jPublish.Data.manager.load()");
// Build the Query
strQuery = strQuery + "SELECT * ";
strQuery = strQuery + " FROM " + strTable;
if(strWhere.length() > 0)
strQuery = strQuery + " WHERE " + strWhere;
// Get Results
try {
sqlResults = sqlStatement.executeQuery(strQuery);
}
// Get Errors
catch (Exception e) {
strError = "Exception error: " + e;
return false;
}
return true;
}
public boolean loadFrom(String strTable, String strColumn) {
String strQuery = "";
// Build the Query
strQuery = strQuery + "SELECT " + this.strTable + ".* ";
strQuery = strQuery + " FROM " + strTable + ", " + this.strTable;
strQuery = strQuery + " WHERE " + strTable + "." + strColumn;
strQuery = strQuery + " = " + this.strTable + ".id;";
// Get Results
try {
sqlResults = sqlStatement.executeQuery(strQuery);
}
// Get Errors
catch (Exception e) {
strError = "Exception error: " + e;
return false;
}
return true;
}
public boolean next() {
try { return sqlResults.next(); }
catch (Exception e) {
strError = "Exception error: " + e;
return false;
}
}
public boolean save() {
// Create Varibles
updates objUpdates = objData.getUpdates();
Object[] arrKeys = objUpdates.getKeys();
try {
// Update Record
for(int iCnt = 0; iCnt < arrKeys.length; iCnt++)
sqlResults.updateString(arrKeys[iCnt].toString(),
objUpdates.get(arrKeys[iCnt].toString()));
// Write Changes
if(objData.getID() > 0)
sqlResults.updateRow();
else
sqlResults.insertRow();
}
// Update Errors
catch (Exception e) {
// Set Error
strError = "Exception error: " + e;
return false;
}
return true;
}
// Abstract Functions
//////////////////////////////////////////////////////
// These must be implimented since the extended object only know the
tables.
public abstract boolean fill();
}
--- DATA.DATA ---
package jPublish.Data;
public abstract class data extends Object {
// Data Menebers
///////////////////////////////////////////////////////////
protected manager objManager;
// Update Tracking
protected updates objUpdates;
// Data
protected long lID;
// Constructors
////////////////////////////////////////////////////////////
data () {
objUpdates = new updates();
}
// Properties
//////////////////////////////////////////////////////////////
public boolean setManager(manager manNew) {
if(manNew != null) {
objManager = manNew;
return true;
}
return false;
}
public boolean setLoaded() { return objUpdates.setUpdated(); }
public manager getManager() { return objManager; }
public updates getUpdates() { return objUpdates; }
// Data Properties
public boolean setID(long lNew) {
if(lNew > 0) {
lID = lNew;
objUpdates.set("id", Long.toString(lNew));
return true;
}
return false;
}
public long getID() { return lID; }
}
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RE: Custom Tag Lib
Posted by "Mike Cherichetti (Renegade Internet)" <mi...@renegadeinternet.com>.
Shawn,
I ran into this problem as well when switching from 4.0 to 4.1. I think it
has something to do with 4.1 pooling and re-using tag objects. What I did
in all of my doStartTag(), doAfterBody(), etc... methods was manually call
release() to reset the data in the tags like so:
public int doStartTag() throws JspException
{
try
{
...
}
catch (Exception exception)
{
throw new JspException(exception);
}
finally
{
release();
}
return SKIP_BODY;
}
Have a nice day ...
Sincerely,
Mike Cherichetti
Renegade Internet
Internet Advertising Delivery Solutions
www.renegadeinternet.com
Phone (724) 658-6346
Fax (724) 658-6346
-----Original Message-----
From: Shawn Zernik [mailto:szernik@internetworkconsulting.net]
Sent: Thursday, August 07, 2003 10:56 PM
To: tomcat-user@jakarta.apache.org
Subject: Custom Tag Lib
Tomcat Users:
I've been fighting with some version differences in tom cat wondering why my
app acts severly different on Tomcat 4.1.27 then 4.0.6. It appears that
4.1.27 is not working from my perspective, and have been fighting with it
since monday. None of the books I have touch this subject or ellude to the
problem, and I've seached high and low for solutions.
I'm having a problem working with my custom tag library. The stange part to
this is it appears to work on tomcat 4.0.6 but not on 4.1.27. The library
has a tage called site that extends a base tag, and those tags use other
classes in my data namespace to hit a database.
The tags are returning the proper data in both versions, but in 4.1.27, I
have to "reload" the contect in the manager for it to "register" the changes
from the database. I have added some printlns to std out to track what's
going on. In tomcat 4.0.6 they are going through all the code as I would
exspect it to. I have included each of the class files that are called. I
have also included the printouts from both versions of tomcat to clierify
how each version is handling the calls.
The object hiarchey goes as follows:
jPublish.Tags site extends inc_tag.
jPublish.Data.site_manager extends jPublish.Data.manager, managers contain,
load, and fill datas.
jPublish.Data.site_data extends jPublish.Data.data, used for storing data
and tracking updates.
--- INDEX.JSP ---
<%@ page contentType="text/html" %>
<%@ taglib prefix="inc" uri="inc" %>
<inc:site site="1" action="none"/>
<html>
<head><title><inc:site action="title" /></title></head>
<body>
<h1>Welcome to <inc:site action="title"/>!</h1>
© <inc:site action="copyright"/>
</body>
</html>
--- TOMCAT 4.0.6 STDOUT ---
Starting service Tomcat-Standalone
Apache Tomcat/4.0.6
Starting service Tomcat-Apache
Apache Tomcat/4.0.6
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.setSite()
jPublish.Data.manager()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
Shawn
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.setSite()
jPublish.Data.manager()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
INC
jPublish.Tags.site.doEndTag(): End
--- TOMCAT 4.1.27 STDOUT: db INC then Shawn ---
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.setSite()
jPublish.Data.manager()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.site.loaded()
INC
jPublish.Tags.site.doEndTag(): End
<Change INC to Shawn in DB>
jPublish.Tags.site.setSite()
jPublish.Data.manager()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.site.doEndTag(): End
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.site.loaded()
INC
jPublish.Tags.site.doEndTag(): End
--- SITE TAG "inc:site" ---
package jPublish.Tags;
import jPublish.Data.*;
public class site extends inc_tag {
private site_data objSite;
// Constructors
////////////////////////////////////////////////////////////
public site() {
objManager = (manager) new site_manager();
System.out.println("jPublish.Tags.site()");
}
// Properties
//////////////////////////////////////////////////////////////
public void setSite(String strNew) {
System.out.println("jPublish.Tags.site.setSite()");
objManager = (manager) new site_manager();
objManager.setWhere("id = " + strNew);
}
// Methods
/////////////////////////////////////////////////////////////////
protected boolean loaded() {
if(super.loaded()) {
objSite = (site_data) objData;
System.out.println("jPublish.Tags.site.loaded()");
return true;
} else
return false;
}
public int doEndTag() {
System.out.println("jPublish.Tags.site.doEndTag(): Begin");
if(strAction.equalsIgnoreCase("id"))
if(loaded()) print(Long.toString(objSite.getID()));
if(strAction.equalsIgnoreCase("design"))
if(loaded()) print(Long.toString(objSite.getDesign()));
if(strAction.equalsIgnoreCase("title"))
if(loaded()) print(objSite.getTitle());
if(strAction.equalsIgnoreCase("webmaster"))
if(loaded()) print(objSite.getWebmaster());
if(strAction.equalsIgnoreCase("email"))
if(loaded()) print(objSite.getEmail());
if(strAction.equalsIgnoreCase("copyright"))
if(loaded()) print(objSite.getCopyright());
if(strAction.equalsIgnoreCase("logo"))
if(loaded()) print(objSite.getLogo());
if(strAction.equalsIgnoreCase("next"))
if(objManager.next()) return this.EVAL_BODY_AGAIN;
System.out.println("jPublish.Tags.site.doEndTag(): End");
return this.SKIP_BODY;
}
}
--- INC_TAG ---
package jPublish.Tags;
import jPublish.Data.*;
import javax.servlet.*;
import javax.servlet.jsp.*;
import javax.servlet.jsp.tagext.*;
public abstract class inc_tag extends TagSupport {
// Data Menebers
///////////////////////////////////////////////////////////
protected manager objManager;
protected data objData;
protected String strWhere;
// Action Data
protected String strAction = "none";
private String strOutput = "none";
// Properties
//////////////////////////////////////////////////////////////
public void setAction(String strNew) { strAction = strNew; }
public void setOutput(String strNew) { strOutput = strNew; }
public manager getManager() { return objManager; }
// Internal Methods
////////////////////////////////////////////////////////
protected boolean loaded() {
System.out.println("jPublish.Tags.inc_tag.loaded()");
if(!(objData instanceof data)) {
System.out.println("jPublish.Tags.inc_tag.loaded(): not instance");
if(objManager.load()) {
System.out.println("jPublish.Tags.inc_tag.loaded(): load ok");
if(objManager.next()) {
System.out.println("jPublish.Tags.inc_tag.loaded(): next ok");
if(objManager.fill()) {
System.out.println("jPublish.Tags.inc_tag.loaded(): reached fill.");
objData = objManager.getData();
return true;
} else
return false;
}
} else
return false;
}
// Data Exist: Loaded
return true;
}
protected void print(String strOut) {
JspWriter out = pageContext.getOut();
System.out.println(strOut);
try { out.print(format(strOut)); }
catch (Exception e) { System.out.println("Exception error: " + e); }
}
protected String format(String strIn) {
String strTemp = new String();
char cTemp;
// String Safe
if(strOutput.equalsIgnoreCase("stringsafe")) {
for(int iCnt = 0; iCnt < strIn.length(); iCnt++) {
cTemp = strIn.charAt(iCnt);
switch(cTemp) {
case '\'':
strTemp += "\\\'";
break;
case '\"':
strTemp += "\\\"";
break;
case '\\':
strTemp += "\\\\";
break;
default:
strTemp += cTemp;
break;
}
}
return strTemp;
}
// Strip String
if(strOutput.equalsIgnoreCase("stringsafe")) {
for(int iCnt = 0; iCnt < strIn.length(); iCnt++) {
cTemp = strIn.charAt(iCnt);
switch(cTemp) {
case '\'':
break;
case '\"':
break;
default:
strTemp += cTemp;
break;
}
}
return strTemp;
}
// HTML Safe
if(strOutput.equalsIgnoreCase("htmlsafe")) {
for(int iCnt = 0; iCnt < strIn.length(); iCnt++) {
cTemp = strIn.charAt(iCnt);
switch(cTemp) {
case '<':
strTemp += "<";
break;
case '>':
strTemp += ">";
break;
default:
strTemp += cTemp;
break;
}
}
return strTemp;
}
// None
return strIn;
}
}
--- DATA.SITE_MANAGER ---
package jPublish.Data;
public class site_manager extends manager {
// Constructors
////////////////////////////////////////////////////////////
public site_manager() {
super();
super.setTable("sites");
}
// Methods
/////////////////////////////////////////////////////////////////
public boolean fill() {
site_data dataNew = new site_data();
try {
dataNew.setID(sqlResults.getLong("id"));
dataNew.setDesign(sqlResults.getLong("design"));
dataNew.setTitle(sqlResults.getString("title"));
dataNew.setWebmaster(sqlResults.getString("webmaster"));
dataNew.setEmail(sqlResults.getString("email"));
dataNew.setCopyright(sqlResults.getString("copyright"));
dataNew.setLogo(sqlResults.getString("logo"));
dataNew.setManager((manager) this);
dataNew.setLoaded();
objData = (data) dataNew;
return true;
}
catch (Exception e) {
strError = "Exception error: " + e;
}
return false;
}
}
--- DATA.SITE_DATA ---
package jPublish.Data;
public class site_data extends data {
// Data Menebers
///////////////////////////////////////////////////////////
private long lDesign;
private String strTitle;
private String strWebmaster;
private String strEmail;
private String strCopyright;
private String strLogo;
// Child Relationships
private section_manager objSections;
// Parent Relationships
private design_manager objDesigns;
// Constructors
////////////////////////////////////////////////////////////
public site_data() { super(); }
// Properties
//////////////////////////////////////////////////////////////
public boolean setDesign(long lNew) {
if(lNew > 0) {
lDesign = lNew;
objUpdates.set("design", Long.toString(lNew));
return true;
}
return false;
}
public boolean setTitle(String strNew) {
if(strNew.length() > 0) {
strTitle = strNew;
objUpdates.set("title", strNew);
return true;
}
return false;
}
public boolean setWebmaster(String strNew) {
if(strNew.length() > 0) {
strWebmaster = strNew;
objUpdates.set("webmaster", strNew);
return true;
}
return false;
}
public boolean setEmail(String strNew) {
if(strNew.length() > 0) {
strEmail = strNew;
objUpdates.set("email", strNew);
return true;
}
return false;
}
public boolean setCopyright(String strNew) {
if(strNew.length() > 0) {
strCopyright = strNew;
objUpdates.set("copyright", strNew);
return true;
}
return false;
}
public boolean setLogo(String strNew) {
if(strNew.length() > 0) {
strLogo = strNew;
objUpdates.set("logo", strNew);
return true;
}
return false;
}
public long getDesign() { return lDesign; }
public String getTitle() { return strTitle; }
public String getWebmaster() { return strWebmaster; }
public String getEmail() { return strEmail; }
public String getCopyright() { return strCopyright; }
public String getLogo() { return strLogo; }
// Child Relationships
public section_manager getSections() {
if(!(objSections instanceof section_manager)) {
objSections = new section_manager();
objSections.setWhere("site = " + this.getID());
objSections.load();
}
return objSections;
}
// Parent Relationships
public design_manager getParentDesign() {
if(!(objDesigns instanceof design_manager)) {
objDesigns = new design_manager();
objDesigns.setWhere("site = " + this.getDesign());
objDesigns.load();
}
return objDesigns;
}
}
--- DATA.MANAGER ---
package jPublish.Data;
import java.sql.*;
public abstract class manager extends Object {
// Data Members
////////////////////////////////////////////////////////////
protected data objData;
protected String strError = new String();
// SQL Options
private String strTable = new String();
private String strWhere = new String();
// Data SQL Connection
protected Connection sqlConnection;
protected Statement sqlStatement;
protected ResultSet sqlResults;
// Constructors
////////////////////////////////////////////////////////////
manager() {
System.out.println("jPublish.Data.manager()");
try {
Class.forName("com.mysql.jdbc.Driver").newInstance();
sqlConnection = DriverManager.getConnection(
"jdbc:mysql://localhost/jPublish", "root", "");
sqlStatement = sqlConnection.createStatement(
ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_UPDATABLE);
}
catch (Exception e) {
strError = "Execption error: " + e;
}
}
// Properties
//////////////////////////////////////////////////////////////
public boolean setTable(String strNew) {
if((strNew instanceof String) && (strNew.length() > 0)) {
strTable = strNew;
return true;
} else
return false;
}
public boolean setWhere(String strNew) {
if((strNew instanceof String) && (strNew.length() > 0)) {
if(strWhere.length() > 0)
strWhere += " AND " + strNew;
else
strWhere = strNew;
return true;
} else
return false;
}
public data getData() { return objData; }
public String getError() { return strError; }
public String getTable() { return strTable; }
public String getWhere() { return strWhere; }
public int getCount() {
int iCurr = -1;
int iLast = -1;
try {
iCurr = sqlResults.getRow();
sqlResults.last();
iLast = sqlResults.getRow();
sqlResults.absolute(iCurr);
}
catch (Exception e) { strError = "Exception Error: " + e; }
return iLast;
}
// Methods
/////////////////////////////////////////////////////////////////
public boolean load() {
String strQuery = "";
System.out.println("jPublish.Data.manager.load()");
// Build the Query
strQuery = strQuery + "SELECT * ";
strQuery = strQuery + " FROM " + strTable;
if(strWhere.length() > 0)
strQuery = strQuery + " WHERE " + strWhere;
// Get Results
try {
sqlResults = sqlStatement.executeQuery(strQuery);
}
// Get Errors
catch (Exception e) {
strError = "Exception error: " + e;
return false;
}
return true;
}
public boolean loadFrom(String strTable, String strColumn) {
String strQuery = "";
// Build the Query
strQuery = strQuery + "SELECT " + this.strTable + ".* ";
strQuery = strQuery + " FROM " + strTable + ", " + this.strTable;
strQuery = strQuery + " WHERE " + strTable + "." + strColumn;
strQuery = strQuery + " = " + this.strTable + ".id;";
// Get Results
try {
sqlResults = sqlStatement.executeQuery(strQuery);
}
// Get Errors
catch (Exception e) {
strError = "Exception error: " + e;
return false;
}
return true;
}
public boolean next() {
try { return sqlResults.next(); }
catch (Exception e) {
strError = "Exception error: " + e;
return false;
}
}
public boolean save() {
// Create Varibles
updates objUpdates = objData.getUpdates();
Object[] arrKeys = objUpdates.getKeys();
try {
// Update Record
for(int iCnt = 0; iCnt < arrKeys.length; iCnt++)
sqlResults.updateString(arrKeys[iCnt].toString(),
objUpdates.get(arrKeys[iCnt].toString()));
// Write Changes
if(objData.getID() > 0)
sqlResults.updateRow();
else
sqlResults.insertRow();
}
// Update Errors
catch (Exception e) {
// Set Error
strError = "Exception error: " + e;
return false;
}
return true;
}
// Abstract Functions
//////////////////////////////////////////////////////
// These must be implimented since the extended object only know the
tables.
public abstract boolean fill();
}
--- DATA.MANAGER ---
package jPublish.Data;
import java.sql.*;
public abstract class manager extends Object {
// Data Members
////////////////////////////////////////////////////////////
protected data objData;
protected String strError = new String();
// SQL Options
private String strTable = new String();
private String strWhere = new String();
// Data SQL Connection
protected Connection sqlConnection;
protected Statement sqlStatement;
protected ResultSet sqlResults;
// Constructors
////////////////////////////////////////////////////////////
manager() {
System.out.println("jPublish.Data.manager()");
try {
Class.forName("com.mysql.jdbc.Driver").newInstance();
sqlConnection = DriverManager.getConnection(
"jdbc:mysql://localhost/jPublish", "root", "");
sqlStatement = sqlConnection.createStatement(
ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_UPDATABLE);
}
catch (Exception e) {
strError = "Execption error: " + e;
}
}
// Properties
//////////////////////////////////////////////////////////////
public boolean setTable(String strNew) {
if((strNew instanceof String) && (strNew.length() > 0)) {
strTable = strNew;
return true;
} else
return false;
}
public boolean setWhere(String strNew) {
if((strNew instanceof String) && (strNew.length() > 0)) {
if(strWhere.length() > 0)
strWhere += " AND " + strNew;
else
strWhere = strNew;
return true;
} else
return false;
}
public data getData() { return objData; }
public String getError() { return strError; }
public String getTable() { return strTable; }
public String getWhere() { return strWhere; }
public int getCount() {
int iCurr = -1;
int iLast = -1;
try {
iCurr = sqlResults.getRow();
sqlResults.last();
iLast = sqlResults.getRow();
sqlResults.absolute(iCurr);
}
catch (Exception e) { strError = "Exception Error: " + e; }
return iLast;
}
// Methods
/////////////////////////////////////////////////////////////////
public boolean load() {
String strQuery = "";
System.out.println("jPublish.Data.manager.load()");
// Build the Query
strQuery = strQuery + "SELECT * ";
strQuery = strQuery + " FROM " + strTable;
if(strWhere.length() > 0)
strQuery = strQuery + " WHERE " + strWhere;
// Get Results
try {
sqlResults = sqlStatement.executeQuery(strQuery);
}
// Get Errors
catch (Exception e) {
strError = "Exception error: " + e;
return false;
}
return true;
}
public boolean loadFrom(String strTable, String strColumn) {
String strQuery = "";
// Build the Query
strQuery = strQuery + "SELECT " + this.strTable + ".* ";
strQuery = strQuery + " FROM " + strTable + ", " + this.strTable;
strQuery = strQuery + " WHERE " + strTable + "." + strColumn;
strQuery = strQuery + " = " + this.strTable + ".id;";
// Get Results
try {
sqlResults = sqlStatement.executeQuery(strQuery);
}
// Get Errors
catch (Exception e) {
strError = "Exception error: " + e;
return false;
}
return true;
}
public boolean next() {
try { return sqlResults.next(); }
catch (Exception e) {
strError = "Exception error: " + e;
return false;
}
}
public boolean save() {
// Create Varibles
updates objUpdates = objData.getUpdates();
Object[] arrKeys = objUpdates.getKeys();
try {
// Update Record
for(int iCnt = 0; iCnt < arrKeys.length; iCnt++)
sqlResults.updateString(arrKeys[iCnt].toString(),
objUpdates.get(arrKeys[iCnt].toString()));
// Write Changes
if(objData.getID() > 0)
sqlResults.updateRow();
else
sqlResults.insertRow();
}
// Update Errors
catch (Exception e) {
// Set Error
strError = "Exception error: " + e;
return false;
}
return true;
}
// Abstract Functions
//////////////////////////////////////////////////////
// These must be implimented since the extended object only know the
tables.
public abstract boolean fill();
}
--- DATA.DATA ---
package jPublish.Data;
public abstract class data extends Object {
// Data Menebers
///////////////////////////////////////////////////////////
protected manager objManager;
// Update Tracking
protected updates objUpdates;
// Data
protected long lID;
// Constructors
////////////////////////////////////////////////////////////
data () {
objUpdates = new updates();
}
// Properties
//////////////////////////////////////////////////////////////
public boolean setManager(manager manNew) {
if(manNew != null) {
objManager = manNew;
return true;
}
return false;
}
public boolean setLoaded() { return objUpdates.setUpdated(); }
public manager getManager() { return objManager; }
public updates getUpdates() { return objUpdates; }
// Data Properties
public boolean setID(long lNew) {
if(lNew > 0) {
lID = lNew;
objUpdates.set("id", Long.toString(lNew));
return true;
}
return false;
}
public long getID() { return lID; }
}
---------------------------------------------------------------------
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RE: Custom Tag Lib
Posted by "Mike Cherichetti (Renegade Internet)" <mi...@renegadeinternet.com>.
Shawn,
I ran into this problem as well when switching from 4.0 to 4.1. I think it
has something to do with 4.1 pooling and re-using tag objects. What I did
in all of my doStartTag(), doAfterBody(), etc... methods was manually call
release() to reset the data in the tags like so:
public int doStartTag() throws JspException
{
try
{
...
}
catch (Exception exception)
{
throw new JspException(exception);
}
finally
{
release();
}
return SKIP_BODY;
}
Have a nice day ...
Sincerely,
Mike Cherichetti
Renegade Internet
Internet Advertising Delivery Solutions
www.renegadeinternet.com
Phone (724) 658-6346
Fax (724) 658-6346
-----Original Message-----
From: Shawn Zernik [mailto:szernik@internetworkconsulting.net]
Sent: Thursday, August 07, 2003 10:56 PM
To: tomcat-user@jakarta.apache.org
Subject: Custom Tag Lib
Tomcat Users:
I've been fighting with some version differences in tom cat wondering why my
app acts severly different on Tomcat 4.1.27 then 4.0.6. It appears that
4.1.27 is not working from my perspective, and have been fighting with it
since monday. None of the books I have touch this subject or ellude to the
problem, and I've seached high and low for solutions.
I'm having a problem working with my custom tag library. The stange part to
this is it appears to work on tomcat 4.0.6 but not on 4.1.27. The library
has a tage called site that extends a base tag, and those tags use other
classes in my data namespace to hit a database.
The tags are returning the proper data in both versions, but in 4.1.27, I
have to "reload" the contect in the manager for it to "register" the changes
from the database. I have added some printlns to std out to track what's
going on. In tomcat 4.0.6 they are going through all the code as I would
exspect it to. I have included each of the class files that are called. I
have also included the printouts from both versions of tomcat to clierify
how each version is handling the calls.
The object hiarchey goes as follows:
jPublish.Tags site extends inc_tag.
jPublish.Data.site_manager extends jPublish.Data.manager, managers contain,
load, and fill datas.
jPublish.Data.site_data extends jPublish.Data.data, used for storing data
and tracking updates.
--- INDEX.JSP ---
<%@ page contentType="text/html" %>
<%@ taglib prefix="inc" uri="inc" %>
<inc:site site="1" action="none"/>
<html>
<head><title><inc:site action="title" /></title></head>
<body>
<h1>Welcome to <inc:site action="title"/>!</h1>
© <inc:site action="copyright"/>
</body>
</html>
--- TOMCAT 4.0.6 STDOUT ---
Starting service Tomcat-Standalone
Apache Tomcat/4.0.6
Starting service Tomcat-Apache
Apache Tomcat/4.0.6
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.setSite()
jPublish.Data.manager()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
Shawn
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.setSite()
jPublish.Data.manager()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
INC
jPublish.Tags.site.doEndTag(): End
--- TOMCAT 4.1.27 STDOUT: db INC then Shawn ---
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.setSite()
jPublish.Data.manager()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.site.loaded()
INC
jPublish.Tags.site.doEndTag(): End
<Change INC to Shawn in DB>
jPublish.Tags.site.setSite()
jPublish.Data.manager()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.site.doEndTag(): End
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.site.loaded()
INC
jPublish.Tags.site.doEndTag(): End
--- SITE TAG "inc:site" ---
package jPublish.Tags;
import jPublish.Data.*;
public class site extends inc_tag {
private site_data objSite;
// Constructors
////////////////////////////////////////////////////////////
public site() {
objManager = (manager) new site_manager();
System.out.println("jPublish.Tags.site()");
}
// Properties
//////////////////////////////////////////////////////////////
public void setSite(String strNew) {
System.out.println("jPublish.Tags.site.setSite()");
objManager = (manager) new site_manager();
objManager.setWhere("id = " + strNew);
}
// Methods
/////////////////////////////////////////////////////////////////
protected boolean loaded() {
if(super.loaded()) {
objSite = (site_data) objData;
System.out.println("jPublish.Tags.site.loaded()");
return true;
} else
return false;
}
public int doEndTag() {
System.out.println("jPublish.Tags.site.doEndTag(): Begin");
if(strAction.equalsIgnoreCase("id"))
if(loaded()) print(Long.toString(objSite.getID()));
if(strAction.equalsIgnoreCase("design"))
if(loaded()) print(Long.toString(objSite.getDesign()));
if(strAction.equalsIgnoreCase("title"))
if(loaded()) print(objSite.getTitle());
if(strAction.equalsIgnoreCase("webmaster"))
if(loaded()) print(objSite.getWebmaster());
if(strAction.equalsIgnoreCase("email"))
if(loaded()) print(objSite.getEmail());
if(strAction.equalsIgnoreCase("copyright"))
if(loaded()) print(objSite.getCopyright());
if(strAction.equalsIgnoreCase("logo"))
if(loaded()) print(objSite.getLogo());
if(strAction.equalsIgnoreCase("next"))
if(objManager.next()) return this.EVAL_BODY_AGAIN;
System.out.println("jPublish.Tags.site.doEndTag(): End");
return this.SKIP_BODY;
}
}
--- INC_TAG ---
package jPublish.Tags;
import jPublish.Data.*;
import javax.servlet.*;
import javax.servlet.jsp.*;
import javax.servlet.jsp.tagext.*;
public abstract class inc_tag extends TagSupport {
// Data Menebers
///////////////////////////////////////////////////////////
protected manager objManager;
protected data objData;
protected String strWhere;
// Action Data
protected String strAction = "none";
private String strOutput = "none";
// Properties
//////////////////////////////////////////////////////////////
public void setAction(String strNew) { strAction = strNew; }
public void setOutput(String strNew) { strOutput = strNew; }
public manager getManager() { return objManager; }
// Internal Methods
////////////////////////////////////////////////////////
protected boolean loaded() {
System.out.println("jPublish.Tags.inc_tag.loaded()");
if(!(objData instanceof data)) {
System.out.println("jPublish.Tags.inc_tag.loaded(): not instance");
if(objManager.load()) {
System.out.println("jPublish.Tags.inc_tag.loaded(): load ok");
if(objManager.next()) {
System.out.println("jPublish.Tags.inc_tag.loaded(): next ok");
if(objManager.fill()) {
System.out.println("jPublish.Tags.inc_tag.loaded(): reached fill.");
objData = objManager.getData();
return true;
} else
return false;
}
} else
return false;
}
// Data Exist: Loaded
return true;
}
protected void print(String strOut) {
JspWriter out = pageContext.getOut();
System.out.println(strOut);
try { out.print(format(strOut)); }
catch (Exception e) { System.out.println("Exception error: " + e); }
}
protected String format(String strIn) {
String strTemp = new String();
char cTemp;
// String Safe
if(strOutput.equalsIgnoreCase("stringsafe")) {
for(int iCnt = 0; iCnt < strIn.length(); iCnt++) {
cTemp = strIn.charAt(iCnt);
switch(cTemp) {
case '\'':
strTemp += "\\\'";
break;
case '\"':
strTemp += "\\\"";
break;
case '\\':
strTemp += "\\\\";
break;
default:
strTemp += cTemp;
break;
}
}
return strTemp;
}
// Strip String
if(strOutput.equalsIgnoreCase("stringsafe")) {
for(int iCnt = 0; iCnt < strIn.length(); iCnt++) {
cTemp = strIn.charAt(iCnt);
switch(cTemp) {
case '\'':
break;
case '\"':
break;
default:
strTemp += cTemp;
break;
}
}
return strTemp;
}
// HTML Safe
if(strOutput.equalsIgnoreCase("htmlsafe")) {
for(int iCnt = 0; iCnt < strIn.length(); iCnt++) {
cTemp = strIn.charAt(iCnt);
switch(cTemp) {
case '<':
strTemp += "<";
break;
case '>':
strTemp += ">";
break;
default:
strTemp += cTemp;
break;
}
}
return strTemp;
}
// None
return strIn;
}
}
--- DATA.SITE_MANAGER ---
package jPublish.Data;
public class site_manager extends manager {
// Constructors
////////////////////////////////////////////////////////////
public site_manager() {
super();
super.setTable("sites");
}
// Methods
/////////////////////////////////////////////////////////////////
public boolean fill() {
site_data dataNew = new site_data();
try {
dataNew.setID(sqlResults.getLong("id"));
dataNew.setDesign(sqlResults.getLong("design"));
dataNew.setTitle(sqlResults.getString("title"));
dataNew.setWebmaster(sqlResults.getString("webmaster"));
dataNew.setEmail(sqlResults.getString("email"));
dataNew.setCopyright(sqlResults.getString("copyright"));
dataNew.setLogo(sqlResults.getString("logo"));
dataNew.setManager((manager) this);
dataNew.setLoaded();
objData = (data) dataNew;
return true;
}
catch (Exception e) {
strError = "Exception error: " + e;
}
return false;
}
}
--- DATA.SITE_DATA ---
package jPublish.Data;
public class site_data extends data {
// Data Menebers
///////////////////////////////////////////////////////////
private long lDesign;
private String strTitle;
private String strWebmaster;
private String strEmail;
private String strCopyright;
private String strLogo;
// Child Relationships
private section_manager objSections;
// Parent Relationships
private design_manager objDesigns;
// Constructors
////////////////////////////////////////////////////////////
public site_data() { super(); }
// Properties
//////////////////////////////////////////////////////////////
public boolean setDesign(long lNew) {
if(lNew > 0) {
lDesign = lNew;
objUpdates.set("design", Long.toString(lNew));
return true;
}
return false;
}
public boolean setTitle(String strNew) {
if(strNew.length() > 0) {
strTitle = strNew;
objUpdates.set("title", strNew);
return true;
}
return false;
}
public boolean setWebmaster(String strNew) {
if(strNew.length() > 0) {
strWebmaster = strNew;
objUpdates.set("webmaster", strNew);
return true;
}
return false;
}
public boolean setEmail(String strNew) {
if(strNew.length() > 0) {
strEmail = strNew;
objUpdates.set("email", strNew);
return true;
}
return false;
}
public boolean setCopyright(String strNew) {
if(strNew.length() > 0) {
strCopyright = strNew;
objUpdates.set("copyright", strNew);
return true;
}
return false;
}
public boolean setLogo(String strNew) {
if(strNew.length() > 0) {
strLogo = strNew;
objUpdates.set("logo", strNew);
return true;
}
return false;
}
public long getDesign() { return lDesign; }
public String getTitle() { return strTitle; }
public String getWebmaster() { return strWebmaster; }
public String getEmail() { return strEmail; }
public String getCopyright() { return strCopyright; }
public String getLogo() { return strLogo; }
// Child Relationships
public section_manager getSections() {
if(!(objSections instanceof section_manager)) {
objSections = new section_manager();
objSections.setWhere("site = " + this.getID());
objSections.load();
}
return objSections;
}
// Parent Relationships
public design_manager getParentDesign() {
if(!(objDesigns instanceof design_manager)) {
objDesigns = new design_manager();
objDesigns.setWhere("site = " + this.getDesign());
objDesigns.load();
}
return objDesigns;
}
}
--- DATA.MANAGER ---
package jPublish.Data;
import java.sql.*;
public abstract class manager extends Object {
// Data Members
////////////////////////////////////////////////////////////
protected data objData;
protected String strError = new String();
// SQL Options
private String strTable = new String();
private String strWhere = new String();
// Data SQL Connection
protected Connection sqlConnection;
protected Statement sqlStatement;
protected ResultSet sqlResults;
// Constructors
////////////////////////////////////////////////////////////
manager() {
System.out.println("jPublish.Data.manager()");
try {
Class.forName("com.mysql.jdbc.Driver").newInstance();
sqlConnection = DriverManager.getConnection(
"jdbc:mysql://localhost/jPublish", "root", "");
sqlStatement = sqlConnection.createStatement(
ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_UPDATABLE);
}
catch (Exception e) {
strError = "Execption error: " + e;
}
}
// Properties
//////////////////////////////////////////////////////////////
public boolean setTable(String strNew) {
if((strNew instanceof String) && (strNew.length() > 0)) {
strTable = strNew;
return true;
} else
return false;
}
public boolean setWhere(String strNew) {
if((strNew instanceof String) && (strNew.length() > 0)) {
if(strWhere.length() > 0)
strWhere += " AND " + strNew;
else
strWhere = strNew;
return true;
} else
return false;
}
public data getData() { return objData; }
public String getError() { return strError; }
public String getTable() { return strTable; }
public String getWhere() { return strWhere; }
public int getCount() {
int iCurr = -1;
int iLast = -1;
try {
iCurr = sqlResults.getRow();
sqlResults.last();
iLast = sqlResults.getRow();
sqlResults.absolute(iCurr);
}
catch (Exception e) { strError = "Exception Error: " + e; }
return iLast;
}
// Methods
/////////////////////////////////////////////////////////////////
public boolean load() {
String strQuery = "";
System.out.println("jPublish.Data.manager.load()");
// Build the Query
strQuery = strQuery + "SELECT * ";
strQuery = strQuery + " FROM " + strTable;
if(strWhere.length() > 0)
strQuery = strQuery + " WHERE " + strWhere;
// Get Results
try {
sqlResults = sqlStatement.executeQuery(strQuery);
}
// Get Errors
catch (Exception e) {
strError = "Exception error: " + e;
return false;
}
return true;
}
public boolean loadFrom(String strTable, String strColumn) {
String strQuery = "";
// Build the Query
strQuery = strQuery + "SELECT " + this.strTable + ".* ";
strQuery = strQuery + " FROM " + strTable + ", " + this.strTable;
strQuery = strQuery + " WHERE " + strTable + "." + strColumn;
strQuery = strQuery + " = " + this.strTable + ".id;";
// Get Results
try {
sqlResults = sqlStatement.executeQuery(strQuery);
}
// Get Errors
catch (Exception e) {
strError = "Exception error: " + e;
return false;
}
return true;
}
public boolean next() {
try { return sqlResults.next(); }
catch (Exception e) {
strError = "Exception error: " + e;
return false;
}
}
public boolean save() {
// Create Varibles
updates objUpdates = objData.getUpdates();
Object[] arrKeys = objUpdates.getKeys();
try {
// Update Record
for(int iCnt = 0; iCnt < arrKeys.length; iCnt++)
sqlResults.updateString(arrKeys[iCnt].toString(),
objUpdates.get(arrKeys[iCnt].toString()));
// Write Changes
if(objData.getID() > 0)
sqlResults.updateRow();
else
sqlResults.insertRow();
}
// Update Errors
catch (Exception e) {
// Set Error
strError = "Exception error: " + e;
return false;
}
return true;
}
// Abstract Functions
//////////////////////////////////////////////////////
// These must be implimented since the extended object only know the
tables.
public abstract boolean fill();
}
--- DATA.MANAGER ---
package jPublish.Data;
import java.sql.*;
public abstract class manager extends Object {
// Data Members
////////////////////////////////////////////////////////////
protected data objData;
protected String strError = new String();
// SQL Options
private String strTable = new String();
private String strWhere = new String();
// Data SQL Connection
protected Connection sqlConnection;
protected Statement sqlStatement;
protected ResultSet sqlResults;
// Constructors
////////////////////////////////////////////////////////////
manager() {
System.out.println("jPublish.Data.manager()");
try {
Class.forName("com.mysql.jdbc.Driver").newInstance();
sqlConnection = DriverManager.getConnection(
"jdbc:mysql://localhost/jPublish", "root", "");
sqlStatement = sqlConnection.createStatement(
ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_UPDATABLE);
}
catch (Exception e) {
strError = "Execption error: " + e;
}
}
// Properties
//////////////////////////////////////////////////////////////
public boolean setTable(String strNew) {
if((strNew instanceof String) && (strNew.length() > 0)) {
strTable = strNew;
return true;
} else
return false;
}
public boolean setWhere(String strNew) {
if((strNew instanceof String) && (strNew.length() > 0)) {
if(strWhere.length() > 0)
strWhere += " AND " + strNew;
else
strWhere = strNew;
return true;
} else
return false;
}
public data getData() { return objData; }
public String getError() { return strError; }
public String getTable() { return strTable; }
public String getWhere() { return strWhere; }
public int getCount() {
int iCurr = -1;
int iLast = -1;
try {
iCurr = sqlResults.getRow();
sqlResults.last();
iLast = sqlResults.getRow();
sqlResults.absolute(iCurr);
}
catch (Exception e) { strError = "Exception Error: " + e; }
return iLast;
}
// Methods
/////////////////////////////////////////////////////////////////
public boolean load() {
String strQuery = "";
System.out.println("jPublish.Data.manager.load()");
// Build the Query
strQuery = strQuery + "SELECT * ";
strQuery = strQuery + " FROM " + strTable;
if(strWhere.length() > 0)
strQuery = strQuery + " WHERE " + strWhere;
// Get Results
try {
sqlResults = sqlStatement.executeQuery(strQuery);
}
// Get Errors
catch (Exception e) {
strError = "Exception error: " + e;
return false;
}
return true;
}
public boolean loadFrom(String strTable, String strColumn) {
String strQuery = "";
// Build the Query
strQuery = strQuery + "SELECT " + this.strTable + ".* ";
strQuery = strQuery + " FROM " + strTable + ", " + this.strTable;
strQuery = strQuery + " WHERE " + strTable + "." + strColumn;
strQuery = strQuery + " = " + this.strTable + ".id;";
// Get Results
try {
sqlResults = sqlStatement.executeQuery(strQuery);
}
// Get Errors
catch (Exception e) {
strError = "Exception error: " + e;
return false;
}
return true;
}
public boolean next() {
try { return sqlResults.next(); }
catch (Exception e) {
strError = "Exception error: " + e;
return false;
}
}
public boolean save() {
// Create Varibles
updates objUpdates = objData.getUpdates();
Object[] arrKeys = objUpdates.getKeys();
try {
// Update Record
for(int iCnt = 0; iCnt < arrKeys.length; iCnt++)
sqlResults.updateString(arrKeys[iCnt].toString(),
objUpdates.get(arrKeys[iCnt].toString()));
// Write Changes
if(objData.getID() > 0)
sqlResults.updateRow();
else
sqlResults.insertRow();
}
// Update Errors
catch (Exception e) {
// Set Error
strError = "Exception error: " + e;
return false;
}
return true;
}
// Abstract Functions
//////////////////////////////////////////////////////
// These must be implimented since the extended object only know the
tables.
public abstract boolean fill();
}
--- DATA.DATA ---
package jPublish.Data;
public abstract class data extends Object {
// Data Menebers
///////////////////////////////////////////////////////////
protected manager objManager;
// Update Tracking
protected updates objUpdates;
// Data
protected long lID;
// Constructors
////////////////////////////////////////////////////////////
data () {
objUpdates = new updates();
}
// Properties
//////////////////////////////////////////////////////////////
public boolean setManager(manager manNew) {
if(manNew != null) {
objManager = manNew;
return true;
}
return false;
}
public boolean setLoaded() { return objUpdates.setUpdated(); }
public manager getManager() { return objManager; }
public updates getUpdates() { return objUpdates; }
// Data Properties
public boolean setID(long lNew) {
if(lNew > 0) {
lID = lNew;
objUpdates.set("id", Long.toString(lNew));
return true;
}
return false;
}
public long getID() { return lID; }
}
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