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/*******************************************************************************
* Copyright (c) 1997-2009 by ProSyst Software GmbH
* http://www.prosyst.com
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* ProSyst Software GmbH - initial API and implementation
*******************************************************************************/
package org.eclipse.equinox.internal.ds;
import org.eclipse.equinox.internal.util.event.Queue;
import org.eclipse.equinox.internal.util.ref.TimerRef;
import org.eclipse.equinox.internal.util.timer.TimerListener;
import org.eclipse.osgi.util.NLS;
import org.osgi.service.cm.ConfigurationEvent;
/**
* @author Stoyan Boshev
* @author Pavlin Dobrev
*/
public class WorkThread implements Runnable, TimerListener {
boolean processBundle = false;
public static int IDLE_TIMEOUT = 1000;
public static int BLOCK_TIMEOUT = 30000;
private SCRManager mgr;
private Object objectToProcess;
boolean running = true;
Thread processingThread;
int waiting = 0;
public WorkThread(SCRManager mgr) {
this.mgr = mgr;
}
/**
* While the event queue has elements - they are processed, i.e.
* ManagedService(Factories) are informed for the event.
*/
public void run() {
processingThread = Thread.currentThread();
do {
try {
Queue queue = mgr.queue;
synchronized (queue) {
if (mgr.stopped) {
mgr.running = false;
break;
}
if (Activator.DEBUG) {
Activator.log.debug("WorkThread.run()", null); //$NON-NLS-1$
}
if (queue.size() == 0) { // wait for more events
try {
waiting++;
queue.wait(IDLE_TIMEOUT);
} catch (Exception ignore) {
//ignore
}
waiting--;
if (mgr.stopped || queue.size() == 0) {
mgr.running = false;
break;
}
}
objectToProcess = queue.get();
if (objectToProcess != null) {
if (Activator.DEBUG) {
Activator.log.debug("WorkThread.run(): object to process " + objectToProcess.toString(), null); //$NON-NLS-1$
}
} else {
continue;
}
}
if (TimerRef.timer != null) {
TimerRef.notifyAfter(this, BLOCK_TIMEOUT, 1);
} else {
if (Activator.DEBUG) {
Activator.log.debug(Messages.TIMER_SERVICE_UNAVAILABLE, null);
}
}
if (objectToProcess instanceof SCRManager.QueuedJob) {
((SCRManager.QueuedJob) objectToProcess).dispatch();
} else if (objectToProcess instanceof ConfigurationEvent) {
mgr.processConfigurationEvent((ConfigurationEvent) objectToProcess);
}
} catch (Throwable t) {
// just for any case. Must not happen in order to keep thread alive
Activator.log.error(Messages.UNEXPECTED_EXCEPTION, t);
} finally {
TimerRef.removeListener(this, 1);
}
} while (running);
objectToProcess = null;
processingThread = null;
}
public void timer(int event) {
Activator.log.warning(NLS.bind(Messages.TIMEOUT_PROCESSING, objectToProcess), null);
running = false;
objectToProcess = null;
mgr.queueBlocked();
}
}
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