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/*******************************************************************************
* Copyright (c) 2011 IBM Corporation and others.
* 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:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.equinox.coordinator;
import java.lang.ref.ReferenceQueue;
import java.lang.ref.WeakReference;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;
import org.eclipse.osgi.util.NLS;
import org.osgi.service.coordinator.Coordination;
import org.osgi.service.coordinator.CoordinationException;
import org.osgi.service.log.LogService;
public class CoordinationWeakReference extends WeakReference<CoordinationReferent> {
private static final ReferenceQueue<CoordinationReferent> referenceQueue = new ReferenceQueue<CoordinationReferent>();
private static final Set<CoordinationWeakReference> references = Collections.synchronizedSet(new HashSet<CoordinationWeakReference>());
public static CoordinationWeakReference newInstance(CoordinationReferent referent) {
CoordinationWeakReference reference = new CoordinationWeakReference(referent);
references.add(reference);
return reference;
}
public static void processOrphanedCoordinations() {
CoordinationWeakReference r;
while ((r = (CoordinationWeakReference)referenceQueue.poll()) != null) {
references.remove(r);
CoordinationImpl c = r.getCoordination();
try {
c.fail(Coordination.ORPHANED);
}
catch (Throwable t) {
c.getLogService().log(LogService.LOG_ERROR, NLS.bind(Messages.CoordinatorImpl_5, c.getName(), c.getId()), t);
}
finally {
try {
c.end();
}
catch (CoordinationException e) {
// This is expected since we already failed the coordination...
if (!Coordination.ORPHANED.equals(e.getCause()))
// ...but only if the cause is ORPHANED.
c.getLogService().log(LogService.LOG_ERROR, NLS.bind(Messages.CoordinatorImpl_5, c.getName(), c.getId()), e);
}
catch (Throwable t) {
c.getLogService().log(LogService.LOG_ERROR, NLS.bind(Messages.CoordinatorImpl_5, c.getName(), c.getId()), t);
}
}
}
}
private final CoordinationImpl coordination;
private CoordinationWeakReference(CoordinationReferent referent) {
super(referent, referenceQueue);
coordination = referent.getDelegate();
if (coordination == null)
throw new NullPointerException();
}
public CoordinationImpl getCoordination() {
return coordination;
}
}
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