/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
*
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* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can obtain
* a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
* or glassfish/bootstrap/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
* Sun designates this particular file as subject to the "Classpath" exception
* as provided by Sun in the GPL Version 2 section of the License file that
* accompanied this code. If applicable, add the following below the License
* Header, with the fields enclosed by brackets [] replaced by your own
* identifying information: "Portions Copyrighted [year]
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*
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*
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
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* only if the new code is made subject to such option by the copyright
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*/
/*
* Copyright 2004-2005 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/*
*/
package com.sun.enterprise.management.support;
import java.util.List;
import java.util.Set;
import java.util.Iterator;
import java.util.ArrayList;
import java.util.Collections;
import java.util.logging.Logger;
import java.util.concurrent.ArrayBlockingQueue;
import javax.management.ObjectName;
import com.sun.appserv.management.util.misc.ExceptionUtil;
import com.sun.appserv.management.util.jmx.JMXUtil;
final class LoaderRegThread extends Thread
{
private static final class QueueItem
{
public final ObjectName mObjectName;
public final boolean mRegister;
QueueItem( final ObjectName item, final boolean register )
{
mObjectName = item;
mRegister = register;
}
}
private volatile boolean mQuit;
private final ArrayBlockingQueue<QueueItem> mQueue;
private final Logger mLogger;
private final LoaderRegHandler mRegHandler;
public
LoaderRegThread(
final LoaderRegHandler regHandler,
final Logger logger )
{
mRegHandler = regHandler;
mLogger = logger;
mQuit = false;
final int maxElements = 512;
mQueue = new ArrayBlockingQueue<QueueItem>( maxElements );
}
private final Logger
getLogger( )
{
return( mLogger );
}
private final void
trace( final Object o )
{
if ( mLogger != null )
{
mLogger.finer( o.toString() );
}
}
public void
quit()
{
mQuit = true;
synchronized( this )
{
this.notify();
}
}
public void
enqueue(
final boolean register,
final List<ObjectName> candidates )
{
for( final ObjectName objectName : candidates )
{
enqueue( register, objectName );
}
}
public void
enqueue(
final boolean register,
final ObjectName theObject )
{
//debug( "ENQUEUE: " + (register? "register" : "unregister") + " : " + JMXUtil.toString(theObject) );
try
{
mQueue.put( new QueueItem( theObject, register ) );
}
catch( InterruptedException e )
{
mQuit = true;
}
}
public void
run()
{
mQuit = false;
while ( ! mQuit )
{
try
{
process();
}
catch( InterruptedException e )
{
mQuit = true;
}
}
}
protected boolean
mySleep( final long millis )
{
boolean interrupted = false;
try
{
Thread.sleep( millis );
}
catch( InterruptedException e )
{
Thread.interrupted();
interrupted = true;
}
return interrupted;
}
/** to support waitAll()--a best effort indicator */
private volatile QueueItem mInProgress = null;
/**
Wait for all outstanding requests to be finished.
A best-effort method; not a 100% guarantee, but that's also
true if something is queued right after the call!
*/
public void
waitAll()
{
while ( mQueue.size() != 0 || mInProgress != null )
{
mySleep( 100 );
}
}
private void
processRegistration( final ObjectName objectName )
{
try
{
mRegHandler.handleMBeanRegistered( objectName );
getLogger().finer( "LoaderRegThread.processRegistration: processed mbean: " + objectName );
}
catch( Throwable t )
{
getLogger().warning( "LoaderRegThread.processRegistration: " +
"registration of MBean failed for: " +
objectName + " = " + t.toString() + ", " + t.getMessage() + "\n" +
ExceptionUtil.getStackTrace( t ) );
}
}
private void
processUnregistration( final ObjectName objectName )
{
try
{
mRegHandler.handleMBeanUnregistered( objectName );
}
catch( Throwable t )
{
getLogger().warning( "LoaderRegThread.processUnregistration: " +
"unregistration of MBean failed for: " +
objectName + " = " + t.toString() );
}
}
public boolean
isQueueEmpty()
{
return mQueue.size() == 0;
}
private void
process()
throws InterruptedException
{
while ( ! mQuit )
{
mInProgress = mQueue.take();
if ( mInProgress == null )
{
mQuit = true; // a null item signals that we should quit
}
//debug( "PROCESS: " + (item.mRegister? "register" : "unregister") + " : " + JMXUtil.toString(item.mObjectName) );
if ( mInProgress.mRegister )
{
processRegistration( mInProgress.mObjectName );
}
else
{
processUnregistration( mInProgress.mObjectName );
}
mInProgress = null;
}
}
}
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