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Posted to dev@commons.apache.org by hu...@apache.org on 2004/03/25 13:41:51 UTC
cvs commit: jakarta-commons-sandbox/chain/apps/mailreader/src/java/org/apache/struts/webapp/example/memory MemoryDatabasePlugIn.java MemorySubscription.java MemoryUser.java MemoryUserDatabase.java TestUserDatabase.java
husted 2004/03/25 04:41:51
Added: chain/apps/mailreader/src/java/org/apache/struts/webapp/example/memory
MemoryDatabasePlugIn.java MemorySubscription.java
MemoryUser.java MemoryUserDatabase.java
TestUserDatabase.java
Log:
Initial import of MailReader Example application for Commons Chain
Revision Changes Path
1.1 jakarta-commons-sandbox/chain/apps/mailreader/src/java/org/apache/struts/webapp/example/memory/MemoryDatabasePlugIn.java
Index: MemoryDatabasePlugIn.java
===================================================================
/*
* $Header: /home/cvs/jakarta-commons-sandbox/chain/apps/mailreader/src/java/org/apache/struts/webapp/example/memory/MemoryDatabasePlugIn.java,v 1.1 2004/03/25 12:41:51 husted Exp $
* $Revision: 1.1 $
* $Date: 2004/03/25 12:41:51 $
*
* Copyright 2000-2004 Apache Software Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.struts.webapp.example.memory;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.struts.action.ActionServlet;
import org.apache.struts.action.PlugIn;
import org.apache.struts.config.ModuleConfig;
import org.apache.struts.webapp.example.Constants;
import javax.servlet.ServletException;
import java.io.*;
/**
* <p><strong>MemoryDatabasePlugIn</strong> initializes and finalizes the
* persistent storage of User and Subscription information for the Struts
* Demonstration Application, using an in-memory database backed by an
* XML file.</p>
*
* <p><strong>IMPLEMENTATION WARNING</strong> - If this web application is run
* from a WAR file, or in another environment where reading and writing of the
* web application resource is impossible, the initial contents will be copied
* to a file in the web application temporary directory provided by the
* container. This is for demonstration purposes only - you should
* <strong>NOT</strong> assume that files written here will survive a restart
* of your servlet container.</p>
*
* @version $Revision: 1.1 $ $Date: 2004/03/25 12:41:51 $
*/
public final class MemoryDatabasePlugIn implements PlugIn {
// ----------------------------------------------------- Instance Variables
/**
* The {@link MemoryUserDatabase} object we construct and make available.
*/
private MemoryUserDatabase database = null;
/**
* Logging output for this plug in instance.
*/
private Log log = LogFactory.getLog(this.getClass());
/**
* The {@link ActionServlet} owning this application.
*/
private ActionServlet servlet = null;
// ------------------------------------------------------------- Properties
/**
* The web application resource path of our persistent database
* storage file.
*/
private String pathname = "/WEB-INF/database.xml";
public String getPathname() {
return (this.pathname);
}
public void setPathname(String pathname) {
this.pathname = pathname;
}
// --------------------------------------------------------- PlugIn Methods
/**
* Gracefully shut down this database, releasing any resources
* that were allocated at initialization.
*/
public void destroy() {
log.info("Finalizing memory database plug in");
if (database != null) {
try {
database.close();
} catch (Exception e) {
log.error("Closing memory database", e);
}
}
servlet.getServletContext().removeAttribute(Constants.DATABASE_KEY);
database = null;
servlet = null;
database = null;
}
/**
* Initialize and load our initial database from persistent storage.
*
* @param servlet The ActionServlet for this web application
* @param config The ApplicationConfig for our owning module
*
* @exception ServletException if we cannot configure ourselves correctly
*/
public void init(ActionServlet servlet, ModuleConfig config)
throws ServletException {
log.info("Initializing memory database plug in from '" +
pathname + "'");
// Remember our associated configuration and servlet
this.servlet = servlet;
// Construct a new database and make it available
database = new MemoryUserDatabase();
try {
String path = calculatePath();
if (log.isDebugEnabled()) {
log.debug(" Loading database from '" + path + "'");
}
database.setPathname(path);
database.open();
} catch (Exception e) {
log.error("Opening memory database", e);
throw new ServletException("Cannot load database from '" +
pathname + "'", e);
}
// Make the initialized database available
servlet.getServletContext().setAttribute(Constants.DATABASE_KEY,
database);
}
// --------------------------------------------------------- Public Methods
// ------------------------------------------------------ Protected Methods
// -------------------------------------------------------- Private Methods
/**
* Calculate and return an absolute pathname to the XML file to contain
* our persistent storage information.
*
* @exception Exception if an input/output error occurs
*/
private String calculatePath() throws Exception {
// Can we access the database via file I/O?
String path = servlet.getServletContext().getRealPath(pathname);
if (path != null) {
return (path);
}
// Does a copy of this file already exist in our temporary directory
File dir = (File)
servlet.getServletContext().getAttribute
("javax.servlet.context.tempdir");
File file = new File(dir, "struts-example-database.xml");
if (file.exists()) {
return (file.getAbsolutePath());
}
// Copy the static resource to a temporary file and return its path
InputStream is =
servlet.getServletContext().getResourceAsStream(pathname);
BufferedInputStream bis = new BufferedInputStream(is, 1024);
FileOutputStream os =
new FileOutputStream(file);
BufferedOutputStream bos = new BufferedOutputStream(os, 1024);
byte buffer[] = new byte[1024];
while (true) {
int n = bis.read(buffer);
if (n <= 0) {
break;
}
bos.write(buffer, 0, n);
}
bos.close();
bis.close();
return (file.getAbsolutePath());
}
}
1.1 jakarta-commons-sandbox/chain/apps/mailreader/src/java/org/apache/struts/webapp/example/memory/MemorySubscription.java
Index: MemorySubscription.java
===================================================================
/*
* $Header: /home/cvs/jakarta-commons-sandbox/chain/apps/mailreader/src/java/org/apache/struts/webapp/example/memory/MemorySubscription.java,v 1.1 2004/03/25 12:41:51 husted Exp $
* $Revision: 1.1 $
* $Date: 2004/03/25 12:41:51 $
*
* Copyright 1999-2004 The Apache Software Foundation.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.struts.webapp.example.memory;
import org.apache.struts.webapp.example.Subscription;
import org.apache.struts.webapp.example.User;
/**
* <p>Concrete implementation of {@link Subscription} for an in-memory
* database backed by an XML data file.</p>
*
* @version $Revision: 1.1 $ $Date: 2004/03/25 12:41:51 $
* @since Struts 1.1
*/
public final class MemorySubscription implements Subscription {
// ----------------------------------------------------------- Constructors
/**
* <p>Construct a new Subscription associated with the specified
* {@link User}.
*
* @param user The user with which we are associated
* @param host The mail host for this subscription
*/
public MemorySubscription(MemoryUser user, String host) {
super();
this.user = user;
this.host = host;
}
// ----------------------------------------------------- Instance Variables
/**
* The mail host for this subscription.
*/
private String host = null;
/**
* The {@link User} with which we are associated.
*/
private MemoryUser user = null;
// ------------------------------------------------------------- Properties
/**
* Should we auto-connect at startup time?
*/
private boolean autoConnect = false;
public boolean getAutoConnect() {
return (this.autoConnect);
}
public void setAutoConnect(boolean autoConnect) {
this.autoConnect = autoConnect;
}
/**
* The mail host for this subscription.
*/
public String getHost() {
return (this.host);
}
/**
* The password (in clear text) for this subscription.
*/
private String password = null;
public String getPassword() {
return (this.password);
}
public void setPassword(String password) {
this.password = password;
}
/**
* The subscription type ("imap" or "pop3").
*/
private String type = "imap";
public String getType() {
return (this.type);
}
public void setType(String type) {
this.type = type;
}
/**
* The User owning this Subscription.
*/
public User getUser() {
return (this.user);
}
/**
* The username for this subscription.
*/
private String username = null;
public String getUsername() {
return (this.username);
}
public void setUsername(String username) {
this.username = username;
}
// --------------------------------------------------------- Public Methods
/**
* Return a String representation of this object.
*/
public String toString() {
StringBuffer sb = new StringBuffer("<subscription host=\"");
sb.append(host);
sb.append("\" autoConnect=\"");
sb.append(autoConnect);
sb.append("\"");
if (password != null) {
sb.append(" password=\"");
sb.append(password);
sb.append("\"");
}
if (type != null) {
sb.append(" type=\"");
sb.append(type);
sb.append("\"");
}
if (username != null) {
sb.append(" username=\"");
sb.append(username);
sb.append("\"");
}
sb.append(">");
return (sb.toString());
}
}
1.1 jakarta-commons-sandbox/chain/apps/mailreader/src/java/org/apache/struts/webapp/example/memory/MemoryUser.java
Index: MemoryUser.java
===================================================================
/*
* $Header: /home/cvs/jakarta-commons-sandbox/chain/apps/mailreader/src/java/org/apache/struts/webapp/example/memory/MemoryUser.java,v 1.1 2004/03/25 12:41:51 husted Exp $
* $Revision: 1.1 $
* $Date: 2004/03/25 12:41:51 $
*
* Copyright 1999-2004 The Apache Software Foundation.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.struts.webapp.example.memory;
import org.apache.struts.webapp.example.Subscription;
import org.apache.struts.webapp.example.User;
import org.apache.struts.webapp.example.UserDatabase;
import java.util.HashMap;
/**
* <p>Concrete implementation of {@link User} for an in-memory
* database backed by an XML data file.</p>
*
* @version $Revision: 1.1 $ $Date: 2004/03/25 12:41:51 $
* @since Struts 1.1
*/
public final class MemoryUser implements User {
// ----------------------------------------------------------- Constructors
/**
* <p>Construct a new User associated with the specified
* {@link UserDatabase}.
*
* @param database The user database with which we are associated
* @param username The username of this user
*/
public MemoryUser(MemoryUserDatabase database, String username) {
super();
this.database = database;
this.username = username;
}
// ----------------------------------------------------- Instance Variables
/**
* The {@link UserDatabase} with which we are associated.
*/
private MemoryUserDatabase database = null;
/**
* The {@link Subscription}s for this User, keyed by hostname.
*/
private HashMap subscriptions = new HashMap();
/**
* The username for this user.
*/
private String username = null;
// ------------------------------------------------------------- Properties
/**
* The {@link UserDatabase} with which we are associated.
*/
public UserDatabase getDatabase() {
return (this.database);
}
/**
* The email address from which messages are sent.
*/
private String fromAddress = null;
public String getFromAddress() {
return (this.fromAddress);
}
public void setFromAddress(String fromAddress) {
this.fromAddress = fromAddress;
}
/**
* The full name of this user, included in from addresses.
*/
private String fullName = null;
public String getFullName() {
return (this.fullName);
}
public void setFullName(String fullName) {
this.fullName = fullName;
}
/**
* The password (in clear text).
*/
private String password = null;
public String getPassword() {
return (this.password);
}
public void setPassword(String password) {
this.password = password;
}
/**
* The EMAIL address to which replies should be sent.
*/
private String replyToAddress = null;
public String getReplyToAddress() {
return (this.replyToAddress);
}
public void setReplyToAddress(String replyToAddress) {
this.replyToAddress = replyToAddress;
}
/**
* Find and return all {@link Subscription}s associated with this user.
* If there are none, a zero-length array is returned.
*/
public Subscription[] getSubscriptions() {
synchronized (subscriptions) {
Subscription results[] = new Subscription[subscriptions.size()];
return ((Subscription[]) subscriptions.values().toArray(results));
}
}
/**
* The username (must be unique).
*/
public String getUsername() {
return (this.username);
}
// --------------------------------------------------------- Public Methods
/**
* Create and return a new {@link Subscription} associated with this
* User, for the specified host name.
*
* @param host Host name for which to create a subscription
*
* @exception IllegalArgumentException if the host name is not unique
* for this user
*/
public Subscription createSubscription(String host) {
synchronized (subscriptions) {
if (subscriptions.get(host) != null) {
throw new IllegalArgumentException("Duplicate host '" + host
+ "' for user '" +
username + "'");
}
MemorySubscription subscription =
new MemorySubscription(this, host);
synchronized (subscriptions) {
subscriptions.put(host, subscription);
}
return (subscription);
}
}
/**
* Find and return the {@link Subscription} associated with the specified
* host. If none is found, return <code>null</code>.
*
* @param host Host name to look up
*/
public Subscription findSubscription(String host) {
synchronized (subscriptions) {
return ((Subscription) subscriptions.get(host));
}
}
/**
* Remove the specified {@link Subscription} from being associated
* with this User.
*
* @param subscription Subscription to be removed
*
* @exception IllegalArgumentException if the specified subscription is not
* associated with this User
*/
public void removeSubscription(Subscription subscription) {
if (!(this == subscription.getUser())) {
throw new IllegalArgumentException
("Subscription not associated with this user");
}
synchronized (subscriptions) {
subscriptions.remove(subscription.getHost());
}
}
/**
* Return a String representation of this object.
*/
public String toString() {
StringBuffer sb = new StringBuffer("<user username=\"");
sb.append(username);
sb.append("\"");
if (fromAddress != null) {
sb.append(" fromAddress=\"");
sb.append(fromAddress);
sb.append("\"");
}
if (fullName != null) {
sb.append(" fullName=\"");
sb.append(fullName);
sb.append("\"");
}
if (password != null) {
sb.append(" password=\"");
sb.append(password);
sb.append("\"");
}
if (replyToAddress != null) {
sb.append(" replyToAddress=\"");
sb.append(replyToAddress);
sb.append("\"");
}
sb.append(">");
return (sb.toString());
}
}
1.1 jakarta-commons-sandbox/chain/apps/mailreader/src/java/org/apache/struts/webapp/example/memory/MemoryUserDatabase.java
Index: MemoryUserDatabase.java
===================================================================
/*
* $Header: /home/cvs/jakarta-commons-sandbox/chain/apps/mailreader/src/java/org/apache/struts/webapp/example/memory/MemoryUserDatabase.java,v 1.1 2004/03/25 12:41:51 husted Exp $
* $Revision: 1.1 $
* $Date: 2004/03/25 12:41:51 $
*
* Copyright 2000-2004 Apache Software Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.struts.webapp.example.memory;
import org.apache.commons.digester.Digester;
import org.apache.commons.digester.ObjectCreationFactory;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.struts.webapp.example.ExpiredPasswordException;
import org.apache.struts.webapp.example.Subscription;
import org.apache.struts.webapp.example.User;
import org.apache.struts.webapp.example.UserDatabase;
import org.xml.sax.Attributes;
import java.io.*;
import java.util.HashMap;
/**
* <p>Concrete implementation of {@link UserDatabase} for an in-memory
* database backed by an XML data file.</p>
*
* @version $Revision: 1.1 $ $Date: 2004/03/25 12:41:51 $
* @since Struts 1.1
*/
public class MemoryUserDatabase implements UserDatabase {
// ----------------------------------------------------------- Constructors
// ----------------------------------------------------- Instance Variables
/**
* Logging output for this user database instance.
*/
private Log log = LogFactory.getLog(this.getClass());
/**
* The {@link User}s associated with this UserDatabase, keyed by username.
*/
private HashMap users = new HashMap();
// ------------------------------------------------------------- Properties
/**
* Absolute pathname to the persistent file we use for loading and storing
* persistent data.
*/
private String pathname = null;
private String pathnameOld = null;
private String pathnameNew = null;
public String getPathname() {
return (this.pathname);
}
public void setPathname(String pathname) {
this.pathname = pathname;
pathnameOld = pathname + ".old";
pathnameNew = pathname + ".new";
}
// --------------------------------------------------------- Public Methods
// See interface for Javadoc
public void close() throws Exception {
save();
}
// See interface for Javadoc
public User createUser(String username) {
synchronized (users) {
if (users.get(username) != null) {
throw new IllegalArgumentException("Duplicate user '" +
username + "'");
}
if (log.isTraceEnabled()) {
log.trace("Creating user '" + username + "'");
}
MemoryUser user = new MemoryUser(this, username);
synchronized (users) {
users.put(username, user);
}
return (user);
}
}
// See interface for Javadoc
public User findUser(String username) throws ExpiredPasswordException {
synchronized (users) {
return ((User) users.get(username));
}
}
// See interface for Javadoc
public User[] findUsers() {
synchronized (users) {
User results[] = new User[users.size()];
return ((User[]) users.values().toArray(results));
}
}
// See interface for Javadoc
public void open() throws Exception {
FileInputStream fis = null;
BufferedInputStream bis = null;
try {
// Acquire an input stream to our database file
if (log.isDebugEnabled()) {
log.debug("Loading database from '" + pathname + "'");
}
fis = new FileInputStream(pathname);
bis = new BufferedInputStream(fis);
// Construct a digester to use for parsing
Digester digester = new Digester();
digester.push(this);
digester.setValidating(false);
digester.addFactoryCreate
("database/user",
new MemoryUserCreationFactory(this));
digester.addFactoryCreate
("database/user/subscription",
new MemorySubscriptionCreationFactory());
// Parse the input stream to initialize our database
digester.parse(bis);
bis.close();
bis = null;
fis = null;
} catch (Exception e) {
log.error("Loading database from '" + pathname + "':", e);
throw e;
} finally {
if (bis != null) {
try {
bis.close();
} catch (Throwable t) {
;
}
bis = null;
fis = null;
}
}
}
// See interface for Javadoc
public void removeUser(User user) {
if (!(this == user.getDatabase())) {
throw new IllegalArgumentException
("User not associated with this database");
}
if (log.isTraceEnabled()) {
log.trace("Removing user '" + user.getUsername() + "'");
}
synchronized (users) {
users.remove(user.getUsername());
}
}
// See interface for Javadoc
public void save() throws Exception {
if (log.isDebugEnabled()) {
log.debug("Saving database to '" + pathname + "'");
}
File fileNew = new File(pathnameNew);
PrintWriter writer = null;
try {
// Configure our PrintWriter
FileOutputStream fos = new FileOutputStream(fileNew);
OutputStreamWriter osw = new OutputStreamWriter(fos);
writer = new PrintWriter(osw);
// Print the file prolog
writer.println("<?xml version='1.0'?>");
writer.println("<database>");
// Print entries for each defined user and associated subscriptions
User users[] = findUsers();
for (int i = 0; i < users.length; i++) {
writer.print(" ");
writer.println(users[i]);
Subscription subscriptions[] =
users[i].getSubscriptions();
for (int j = 0; j < subscriptions.length; j++) {
writer.print(" ");
writer.println(subscriptions[j]);
writer.print(" ");
writer.println("</subscription>");
}
writer.print(" ");
writer.println("</user>");
}
// Print the file epilog
writer.println("</database>");
// Check for errors that occurred while printing
if (writer.checkError()) {
writer.close();
fileNew.delete();
throw new IOException
("Saving database to '" + pathname + "'");
}
writer.close();
writer = null;
} catch (IOException e) {
if (writer != null) {
writer.close();
}
fileNew.delete();
throw e;
}
// Perform the required renames to permanently save this file
File fileOrig = new File(pathname);
File fileOld = new File(pathnameOld);
if (fileOrig.exists()) {
fileOld.delete();
if (!fileOrig.renameTo(fileOld)) {
throw new IOException
("Renaming '" + pathname + "' to '" + pathnameOld + "'");
}
}
if (!fileNew.renameTo(fileOrig)) {
if (fileOld.exists()) {
fileOld.renameTo(fileOrig);
}
throw new IOException
("Renaming '" + pathnameNew + "' to '" + pathname + "'");
}
fileOld.delete();
}
}
/**
* Digester object creation factory for subscription instances.
*/
class MemorySubscriptionCreationFactory implements ObjectCreationFactory {
private Digester digester = null;
public Digester getDigester() {
return (this.digester);
}
public void setDigester(Digester digester) {
this.digester = digester;
}
public Object createObject(Attributes attributes) {
String host = attributes.getValue("host");
User user = (User) digester.peek();
Subscription subscription = user.createSubscription(host);
String autoConnect = attributes.getValue("autoConnect");
if (autoConnect == null) {
autoConnect = "false";
}
if ("true".equalsIgnoreCase(autoConnect) ||
"yes".equalsIgnoreCase(autoConnect)) {
subscription.setAutoConnect(true);
} else {
subscription.setAutoConnect(false);
}
subscription.setPassword(attributes.getValue("password"));
subscription.setType(attributes.getValue("type"));
subscription.setUsername(attributes.getValue("username"));
return (subscription);
}
}
/**
* Digester object creation factory for user instances.
*/
class MemoryUserCreationFactory implements ObjectCreationFactory {
public MemoryUserCreationFactory(MemoryUserDatabase database) {
this.database = database;
}
private MemoryUserDatabase database = null;
private Digester digester = null;
public Digester getDigester() {
return (this.digester);
}
public void setDigester(Digester digester) {
this.digester = digester;
}
public Object createObject(Attributes attributes) {
String username = attributes.getValue("username");
User user = database.createUser(username);
user.setFromAddress(attributes.getValue("fromAddress"));
user.setFullName(attributes.getValue("fullName"));
user.setPassword(attributes.getValue("password"));
user.setReplyToAddress(attributes.getValue("replyToAddress"));
return (user);
}
}
1.1 jakarta-commons-sandbox/chain/apps/mailreader/src/java/org/apache/struts/webapp/example/memory/TestUserDatabase.java
Index: TestUserDatabase.java
===================================================================
/*
* Copyright 1999-2002,2004 The Apache Software Foundation.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.struts.webapp.example.memory;
import org.apache.struts.webapp.example.ExpiredPasswordException;
import org.apache.struts.webapp.example.User;
/**
* <p>Help test exception handling by throwing exceptions when "magic" user names are requested.</p>
*/
public final class TestUserDatabase extends MemoryUserDatabase {
/**
* If the username is "expired" throw an ExpiredPasswordException
* to simulate a business exception.
* If the username is "arithmetic" throw an Aritmetic exception to
* simulate a system exception.
* Otherwise, delegate to MemoryDatabase.
* @param username
* @return
*/
public User findUser(String username) throws ExpiredPasswordException {
if ("expired".equals(username)) throw new ExpiredPasswordException("Testing ExpiredPasswordException ...");
if ("arithmetic".equals(username)) throw new ArithmeticException();
return super.findUser(username);
}
}
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