| /******************************************************************************* |
| * 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; |
| import org.osgi.service.log.LogService; |
| |
| /** |
| * @author Stoyan Boshev |
| * @author Pavlin Dobrev |
| */ |
| |
| public class WorkThread implements Runnable, TimerListener { |
| |
| 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("[SCR] WorkThread.run(): Timer service is not available! Skipping timeout check", null); //$NON-NLS-1$ |
| } |
| } |
| 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(null, LogService.LOG_ERROR, Messages.UNEXPECTED_EXCEPTION, t); |
| } finally { |
| TimerRef.removeListener(this, 1); |
| } |
| } while (running); |
| objectToProcess = null; |
| processingThread = null; |
| } |
| |
| public void timer(int event) { |
| Activator.log(null, LogService.LOG_WARNING, NLS.bind(Messages.TIMEOUT_PROCESSING, objectToProcess), null); |
| running = false; |
| objectToProcess = null; |
| mgr.queueBlocked(); |
| } |
| |
| } |