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Diffstat (limited to 'jpa/plugins/org.eclipse.jpt.core/src/org/eclipse/jpt/core/internal/utility/CallbackJobSynchronizer.java')
-rw-r--r--jpa/plugins/org.eclipse.jpt.core/src/org/eclipse/jpt/core/internal/utility/CallbackJobSynchronizer.java153
1 files changed, 0 insertions, 153 deletions
diff --git a/jpa/plugins/org.eclipse.jpt.core/src/org/eclipse/jpt/core/internal/utility/CallbackJobSynchronizer.java b/jpa/plugins/org.eclipse.jpt.core/src/org/eclipse/jpt/core/internal/utility/CallbackJobSynchronizer.java
deleted file mode 100644
index 7ddb587da5..0000000000
--- a/jpa/plugins/org.eclipse.jpt.core/src/org/eclipse/jpt/core/internal/utility/CallbackJobSynchronizer.java
+++ /dev/null
@@ -1,153 +0,0 @@
-/*******************************************************************************
- * Copyright (c) 2009 Oracle. 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:
- * Oracle - initial API and implementation
- ******************************************************************************/
-package org.eclipse.jpt.core.internal.utility;
-
-import org.eclipse.core.runtime.IProgressMonitor;
-import org.eclipse.core.runtime.IStatus;
-import org.eclipse.core.runtime.jobs.ISchedulingRule;
-import org.eclipse.jpt.utility.internal.ListenerList;
-import org.eclipse.jpt.utility.internal.synchronizers.CallbackSynchronizer;
-
-/**
- * Extend the job synchronizer to notify listeners
- * when a synchronization "cycle" is complete; i.e. the synchronization has,
- * for the moment, handled every "synchronize" request and quiesced.
- * This notification is <em>not</em> guaranteed to occur with <em>every</em>
- * synchronization "cycle";
- * since other, unrelated, synchronizations can be triggered concurrently.
- */
-public class CallbackJobSynchronizer
- extends JobSynchronizer
- implements CallbackSynchronizer
-{
- private final ListenerList<Listener> listenerList = new ListenerList<Listener>(Listener.class);
-
-
- // ********** construction **********
-
- /**
- * Construct a callback job synchronizer that uses the specified job command to
- * perform the synchronization. Assign the generated Eclipse job the
- * specified name.
- */
- public CallbackJobSynchronizer(String jobName, JobCommand command) {
- super(jobName, command);
- }
-
- /**
- * Construct a callback job synchronizer that uses the specified job command to
- * perform the synchronization. Assign the generated Eclipse job the
- * specified name and scheduling rule.
- */
- public CallbackJobSynchronizer(String jobName, JobCommand command, ISchedulingRule schedulingRule) {
- super(jobName, command, schedulingRule);
- }
-
- /**
- * Build a job that will let us know when the synchronization has
- * quiesced.
- */
- @Override
- SynchronizationJob buildJob(String jobName, JobCommand command, ISchedulingRule schedulingRule) {
- return new CallbackSynchronizationJob(jobName, command, schedulingRule);
- }
-
-
- // ********** CallbackSynchronizer implementation **********
-
- public void addListener(Listener listener) {
- this.listenerList.add(listener);
- }
-
- public void removeListener(Listener listener) {
- this.listenerList.remove(listener);
- }
-
- /**
- * Notify our listeners.
- */
- void synchronizationQuiesced() {
- for (Listener listener : this.listenerList.getListeners()) {
- listener.synchronizationQuiesced(this);
- }
- }
-
-
- // ********** synchronization job **********
-
- /**
- * Extend {@link JobSynchronizer.SynchronizationJob}
- * to notify the synchronizer when the synchronization has quiesced
- * (i.e. the command has finished executing and there are no further
- * requests for synchronization).
- * Because synchronization occurs during the job's execution,
- * no other thread will be able to
- * initiate another synchronization until the synchronizer's listeners have been
- * notified. Note also, the synchronizer's listeners can, themselves,
- * trigger another synchronization (by directly or indirectly calling
- * {@link org.eclipse.jpt.utility.internal.synchronizers.Synchronizer#synchronize());
- * but this synchronization will not occur until <em>after</em> all the
- * listeners have been notified.
- */
- class CallbackSynchronizationJob
- extends SynchronizationJob
- {
- /**
- * When this flag is set to true, the job has been scheduled to run.
- * We need this because {@link org.eclipse.core.runtime.jobs.Job Job}
- * has no public API for discovering whether a job is "scheduled".
- */
- // use 'volatile' because synchronization isn't really required
- private volatile boolean scheduled;
-
-
- CallbackSynchronizationJob(String jobName, JobCommand command, ISchedulingRule schedulingRule) {
- super(jobName, command, schedulingRule);
- this.scheduled = false;
- }
-
- /**
- * If we are allowing the job to be scheduled (i.e. {@link #start()}
- * was called), set the "scheduled" flag.
- */
- @Override
- void synchronize() {
- if (this.shouldSchedule) {
- this.scheduled = true;
- }
- super.synchronize();
- }
-
- /**
- * Clear the "scheduled" flag; perform the synchronization; and,
- * if the "scheduled" flag is still clear (i.e. there have been no
- * further calls to {@link #synchronize()}), notify our listeners.
- */
- @Override
- protected IStatus run(IProgressMonitor monitor) {
- this.scheduled = false;
- IStatus status = super.run(monitor);
- // hmmm - we will notify listeners even when we our job is "stopped";
- // that seems ok... ~bjv
- if ( ! this.scheduled) {
- CallbackJobSynchronizer.this.synchronizationQuiesced();
- }
- return status;
- }
-
- @Override
- void stop() {
- this.scheduled = false;
- super.stop();
- }
-
- }
-
-}

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