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Diffstat (limited to 'plugins/org.eclipse.net4j.util/src/org/eclipse/net4j/util/concurrent/AsynchronousWorkSerializer.java')
-rw-r--r--plugins/org.eclipse.net4j.util/src/org/eclipse/net4j/util/concurrent/AsynchronousWorkSerializer.java322
1 files changed, 161 insertions, 161 deletions
diff --git a/plugins/org.eclipse.net4j.util/src/org/eclipse/net4j/util/concurrent/AsynchronousWorkSerializer.java b/plugins/org.eclipse.net4j.util/src/org/eclipse/net4j/util/concurrent/AsynchronousWorkSerializer.java
index 602621d9e2..58c0ce7230 100644
--- a/plugins/org.eclipse.net4j.util/src/org/eclipse/net4j/util/concurrent/AsynchronousWorkSerializer.java
+++ b/plugins/org.eclipse.net4j.util/src/org/eclipse/net4j/util/concurrent/AsynchronousWorkSerializer.java
@@ -1,161 +1,161 @@
-/*
- * Copyright (c) 2004 - 2012 Eike Stepper (Berlin, Germany) 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:
- * Eike Stepper - initial API and implementation
- */
-package org.eclipse.net4j.util.concurrent;
-
-import org.eclipse.net4j.internal.util.bundle.OM;
-import org.eclipse.net4j.util.om.trace.ContextTracer;
-
-import java.util.Queue;
-import java.util.concurrent.ConcurrentLinkedQueue;
-import java.util.concurrent.ExecutorService;
-
-/**
- * @author Eike Stepper
- */
-public class AsynchronousWorkSerializer implements IWorkSerializer, Runnable
-{
- private static final ContextTracer TRACER = new ContextTracer(OM.DEBUG_CONCURRENCY, AsynchronousWorkSerializer.class);
-
- private ExecutorService executorService;
-
- private Queue<Runnable> workQueue;
-
- private Occupation occupation = new Occupation();
-
- // private Object newElementLock = new Object();
-
- public AsynchronousWorkSerializer(ExecutorService executorService, Queue<Runnable> workQueue)
- {
- if (executorService == null)
- {
- throw new IllegalArgumentException("executorService == null"); //$NON-NLS-1$
- }
-
- this.executorService = executorService;
- this.workQueue = workQueue;
- }
-
- public AsynchronousWorkSerializer(ExecutorService executorService)
- {
- this(executorService, new ConcurrentLinkedQueue<Runnable>());
- }
-
- public ExecutorService getExecutorService()
- {
- return executorService;
- }
-
- public boolean addWork(Runnable work)
- {
- // Need to be a block of execution. Cannot add when doing last check
- // XXX synchronized (newElementLock)
- {
- workQueue.add(work);
-
- // isOccupied can (and must) be called unsynchronized here
- if (!occupation.isOccupied())
- {
- synchronized (occupation)
- {
- occupation.setOccupied(true);
- }
-
- if (TRACER.isEnabled())
- {
- TRACER.trace("Notifying executor service"); //$NON-NLS-1$
- }
-
- executorService.execute(this);
- }
- }
-
- return true;
- }
-
- /**
- * Executed in the context of the {@link #getExecutorService() executor service}.
- * <p>
- */
- public void run()
- {
- // XXX synchronized (occupation)
- {
- Runnable work;
- // for (;;)
- {
- while (occupation.isOccupied() && (work = workQueue.poll()) != null)
- {
- try
- {
- work.run();
- }
- catch (RuntimeException ex)
- {
- if (TRACER.isEnabled())
- {
- TRACER.trace(ex);
- }
- }
- }
-
- // ConcurrencyUtil.sleep(500);
-
- // Could put the sync in the while loop... but not efficient.
- // Doing a last check to make sure that no one added something in the
- // queue
- // synchronized (newElementLock)
- // {
- // if (!occupation.isOccupied() || (work = workQueue.peek()) == null)
- // {
- // occupation.setOccupied(false);
- // break;
- // }
- // }
- }
- }
- }
-
- public void dispose()
- {
- if (occupation.isOccupied())
- {
- occupation.setOccupied(false);
- }
-
- workQueue.clear();
- workQueue = null;
- executorService = null;
- }
-
- @Override
- public String toString()
- {
- return AsynchronousWorkSerializer.class.getSimpleName();
- }
-
- /**
- * @author Eike Stepper
- */
- private static final class Occupation
- {
- private boolean occupied;
-
- public boolean isOccupied()
- {
- return occupied;
- }
-
- public void setOccupied(boolean occupied)
- {
- this.occupied = occupied;
- }
- }
-}
+/*
+ * Copyright (c) 2004 - 2012 Eike Stepper (Berlin, Germany) 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:
+ * Eike Stepper - initial API and implementation
+ */
+package org.eclipse.net4j.util.concurrent;
+
+import org.eclipse.net4j.internal.util.bundle.OM;
+import org.eclipse.net4j.util.om.trace.ContextTracer;
+
+import java.util.Queue;
+import java.util.concurrent.ConcurrentLinkedQueue;
+import java.util.concurrent.ExecutorService;
+
+/**
+ * @author Eike Stepper
+ */
+public class AsynchronousWorkSerializer implements IWorkSerializer, Runnable
+{
+ private static final ContextTracer TRACER = new ContextTracer(OM.DEBUG_CONCURRENCY, AsynchronousWorkSerializer.class);
+
+ private ExecutorService executorService;
+
+ private Queue<Runnable> workQueue;
+
+ private Occupation occupation = new Occupation();
+
+ // private Object newElementLock = new Object();
+
+ public AsynchronousWorkSerializer(ExecutorService executorService, Queue<Runnable> workQueue)
+ {
+ if (executorService == null)
+ {
+ throw new IllegalArgumentException("executorService == null"); //$NON-NLS-1$
+ }
+
+ this.executorService = executorService;
+ this.workQueue = workQueue;
+ }
+
+ public AsynchronousWorkSerializer(ExecutorService executorService)
+ {
+ this(executorService, new ConcurrentLinkedQueue<Runnable>());
+ }
+
+ public ExecutorService getExecutorService()
+ {
+ return executorService;
+ }
+
+ public boolean addWork(Runnable work)
+ {
+ // Need to be a block of execution. Cannot add when doing last check
+ // XXX synchronized (newElementLock)
+ {
+ workQueue.add(work);
+
+ // isOccupied can (and must) be called unsynchronized here
+ if (!occupation.isOccupied())
+ {
+ synchronized (occupation)
+ {
+ occupation.setOccupied(true);
+ }
+
+ if (TRACER.isEnabled())
+ {
+ TRACER.trace("Notifying executor service"); //$NON-NLS-1$
+ }
+
+ executorService.execute(this);
+ }
+ }
+
+ return true;
+ }
+
+ /**
+ * Executed in the context of the {@link #getExecutorService() executor service}.
+ * <p>
+ */
+ public void run()
+ {
+ // XXX synchronized (occupation)
+ {
+ Runnable work;
+ // for (;;)
+ {
+ while (occupation.isOccupied() && (work = workQueue.poll()) != null)
+ {
+ try
+ {
+ work.run();
+ }
+ catch (RuntimeException ex)
+ {
+ if (TRACER.isEnabled())
+ {
+ TRACER.trace(ex);
+ }
+ }
+ }
+
+ // ConcurrencyUtil.sleep(500);
+
+ // Could put the sync in the while loop... but not efficient.
+ // Doing a last check to make sure that no one added something in the
+ // queue
+ // synchronized (newElementLock)
+ // {
+ // if (!occupation.isOccupied() || (work = workQueue.peek()) == null)
+ // {
+ // occupation.setOccupied(false);
+ // break;
+ // }
+ // }
+ }
+ }
+ }
+
+ public void dispose()
+ {
+ if (occupation.isOccupied())
+ {
+ occupation.setOccupied(false);
+ }
+
+ workQueue.clear();
+ workQueue = null;
+ executorService = null;
+ }
+
+ @Override
+ public String toString()
+ {
+ return AsynchronousWorkSerializer.class.getSimpleName();
+ }
+
+ /**
+ * @author Eike Stepper
+ */
+ private static final class Occupation
+ {
+ private boolean occupied;
+
+ public boolean isOccupied()
+ {
+ return occupied;
+ }
+
+ public void setOccupied(boolean occupied)
+ {
+ this.occupied = occupied;
+ }
+ }
+}

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