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Posted to dev@tomcat.apache.org by co...@apache.org on 2003/01/11 07:52:28 UTC
cvs commit: jakarta-tomcat-connectors/util/java/org/apache/tomcat/util/threads ThreadPoolMX.java
costin 2003/01/10 22:52:27
Added: util/java/org/apache/tomcat/util/threads ThreadPoolMX.java
Log:
Added a "JMX" extension to threadpool.
This will keep the ThreadPool independent of JMX.
Also added few "informative" methods to display the threads and
the status of each thread. ( I need to commit few changes in
http and jk connector to take provide this info )
Revision Changes Path
1.1 jakarta-tomcat-connectors/util/java/org/apache/tomcat/util/threads/ThreadPoolMX.java
Index: ThreadPoolMX.java
===================================================================
/*
*
* ====================================================================
*
* The Apache Software License, Version 1.1
*
* Copyright (c) 1999 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution, if
* any, must include the following acknowlegement:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "The Jakarta Project", "Tomcat", and "Apache Software
* Foundation" must not be used to endorse or promote products derived
* from this software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache"
* nor may "Apache" appear in their names without prior written
* permission of the Apache Group.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
* [Additional notices, if required by prior licensing conditions]
*
*/
package org.apache.tomcat.util.threads;
import java.util.*;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.commons.modeler.Registry;
/**
* Manageable thread pool
*
* @author Costin Manolache
*/
public class ThreadPoolMX extends ThreadPool {
static Log log = LogFactory.getLog(ThreadPoolMX.class);
Registry reg;
protected String domain;
protected String name;
public ThreadPoolMX() {
super();
}
public void setDomain(String domain) {
this.domain=domain;
}
public String getDomain() {
return domain;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name=name;
reg=Registry.getRegistry();
try {
reg.registerComponent(this, domain, "ThreadPool",
"name=" + name);
} catch( Exception ex ) {
log.error( "Error registering thread pool", ex );
}
}
public synchronized void start() {
super.start();
}
public void addThread( Thread t, ControlRunnable cr ) {
threads.put( t, cr );
for( int i=0; i<listeners.size(); i++ ) {
ThreadPoolListener tpl=(ThreadPoolListener)listeners.elementAt(i);
tpl.threadStart(this, t);
}
}
public void removeThread( Thread t ) {
threads.remove(t);
for( int i=0; i<listeners.size(); i++ ) {
ThreadPoolListener tpl=(ThreadPoolListener)listeners.elementAt(i);
tpl.threadEnd(this, t);
}
}
public void addThreadPoolListener( ThreadPoolListener tpl ) {
listeners.addElement( tpl );
}
/**
* Executes a given Runnable on a thread in the pool, block if needed.
*/
public void runIt(ThreadPoolRunnable r) {
super.runIt( r );
}
/**
* Stop the thread pool
*/
public synchronized void shutdown() {
super.shutdown();
}
/**
* Returns the thread to the pool.
* Called by threads as they are becoming idel.
*/
protected synchronized void returnController(ControlRunnable c) {
super.returnController(c);
}
/**
* Inform the pool that the specific thread finish.
*
* Called by the ControlRunnable.run() when the runnable
* throws an exception.
*/
protected synchronized void notifyThreadEnd(ControlRunnable c) {
super.notifyThreadEnd(c);
}
/** Debug display of the stage of each thread. The return is html style,
* for display in the console ( it can be easily parsed too )
*
* @return
*/
public String threadStatusString() {
StringBuffer sb=new StringBuffer();
Iterator it=threads.keySet().iterator();
sb.append("<ul>");
while( it.hasNext()) {
sb.append("<li>");
ThreadWithAttributes twa=(ThreadWithAttributes)
it.next();
sb.append(twa.getCurrentStage(this) ).append(" ");
sb.append( twa.getParam(this));
sb.append( "</li>\n");
}
sb.append("</ul>");
return sb.toString();
}
/** Return an array with the status of each thread. The status
* indicates the current request processing stage ( for tomcat ) or
* whatever the thread is doing ( if the application using TP provide
* this info )
*
* @return
*/
public String[] threadStatus() {
String status[]=new String[ threads.size()];
Iterator it=threads.keySet().iterator();
for( int i=0; ( i<status.length && it.hasNext()); i++ ) {
ThreadWithAttributes twa=(ThreadWithAttributes)
it.next();
status[i]=twa.getCurrentStage(this);
}
return status;
}
/** Return an array with the current "param" ( XXX better name ? )
* of each thread. This is typically the last request.
*
* @return
*/
public String[] threadParam() {
String status[]=new String[ threads.size()];
Iterator it=threads.keySet().iterator();
for( int i=0; ( i<status.length && it.hasNext()); i++ ) {
ThreadWithAttributes twa=(ThreadWithAttributes)
it.next();
Object o=twa.getParam(this);
status[i]=(o==null)? null : o.toString();
}
return status;
}
}
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