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authorMatthias Sohn <matthias.sohn@sap.com>2016-06-21 11:59:15 -0400
committerGerrit Code Review @ Eclipse.org <gerrit@eclipse.org>2016-06-21 11:59:16 -0400
commit203888f3fa2319412b47c27bb122dc7af77faedd (patch)
tree5c6f7fe061126a7e8a0b47e9e8cddaa4fd39cfd8
parent93486301b3101f2fd403991ad3cd487903f62a70 (diff)
parent26862bb834b90722d6290181f8776711d8a7d10d (diff)
downloadjgit-203888f3fa2319412b47c27bb122dc7af77faedd.tar.gz
jgit-203888f3fa2319412b47c27bb122dc7af77faedd.zip
Merge "Extract work queue to allow reusing it" into stable-4.4
-rw-r--r--org.eclipse.jgit/src/org/eclipse/jgit/lib/BatchingProgressMonitor.java49
-rw-r--r--org.eclipse.jgit/src/org/eclipse/jgit/lib/WorkQueue.java99
2 files changed, 102 insertions, 46 deletions
diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/lib/BatchingProgressMonitor.java b/org.eclipse.jgit/src/org/eclipse/jgit/lib/BatchingProgressMonitor.java
index 39856c0c98..a3859abb23 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/lib/BatchingProgressMonitor.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/lib/BatchingProgressMonitor.java
@@ -43,55 +43,11 @@
package org.eclipse.jgit.lib;
-import java.util.concurrent.Executors;
import java.util.concurrent.Future;
-import java.util.concurrent.ScheduledThreadPoolExecutor;
-import java.util.concurrent.ThreadFactory;
import java.util.concurrent.TimeUnit;
/** ProgressMonitor that batches update events. */
public abstract class BatchingProgressMonitor implements ProgressMonitor {
- private static final ScheduledThreadPoolExecutor alarmQueue;
-
- static final Object alarmQueueKiller;
-
- static {
- // To support garbage collection, start our thread but
- // swap out the thread factory. When our class is GC'd
- // the alarmQueueKiller will finalize and ask the executor
- // to shutdown, ending the worker.
- //
- int threads = 1;
- alarmQueue = new ScheduledThreadPoolExecutor(threads,
- new ThreadFactory() {
- private final ThreadFactory baseFactory = Executors
- .defaultThreadFactory();
-
- public Thread newThread(Runnable taskBody) {
- Thread thr = baseFactory.newThread(taskBody);
- thr.setName("JGit-AlarmQueue"); //$NON-NLS-1$
- thr.setDaemon(true);
- return thr;
- }
- });
- alarmQueue.setContinueExistingPeriodicTasksAfterShutdownPolicy(false);
- alarmQueue.setExecuteExistingDelayedTasksAfterShutdownPolicy(false);
- alarmQueue.prestartAllCoreThreads();
-
- // Now that the threads are running, its critical to swap out
- // our own thread factory for one that isn't in the ClassLoader.
- // This allows the class to GC.
- //
- alarmQueue.setThreadFactory(Executors.defaultThreadFactory());
-
- alarmQueueKiller = new Object() {
- @Override
- protected void finalize() {
- alarmQueue.shutdownNow();
- }
- };
- }
-
private long delayStartTime;
private TimeUnit delayStartUnit = TimeUnit.MILLISECONDS;
@@ -219,7 +175,7 @@ public abstract class BatchingProgressMonitor implements ProgressMonitor {
void delay(long time, TimeUnit unit) {
display = false;
- timerFuture = alarmQueue.schedule(this, time, unit);
+ timerFuture = WorkQueue.getExecutor().schedule(this, time, unit);
}
public void run() {
@@ -254,7 +210,8 @@ public abstract class BatchingProgressMonitor implements ProgressMonitor {
private void restartTimer() {
display = false;
- timerFuture = alarmQueue.schedule(this, 1, TimeUnit.SECONDS);
+ timerFuture = WorkQueue.getExecutor().schedule(this, 1,
+ TimeUnit.SECONDS);
}
void end(BatchingProgressMonitor pm) {
diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/lib/WorkQueue.java b/org.eclipse.jgit/src/org/eclipse/jgit/lib/WorkQueue.java
new file mode 100644
index 0000000000..9735d19e5e
--- /dev/null
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/lib/WorkQueue.java
@@ -0,0 +1,99 @@
+/*
+ * Copyright (C) 2008-2016, Google Inc.
+ * and other copyright owners as documented in the project's IP log.
+ *
+ * This program and the accompanying materials are made available
+ * under the terms of the Eclipse Distribution License v1.0 which
+ * accompanies this distribution, is reproduced below, and is
+ * available at http://www.eclipse.org/org/documents/edl-v10.php
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials provided
+ * with the distribution.
+ *
+ * - Neither the name of the Eclipse Foundation, Inc. nor the
+ * names of its contributors may be used to endorse or promote
+ * products derived from this software without specific prior
+ * written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+ * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package org.eclipse.jgit.lib;
+
+import java.util.concurrent.Executors;
+import java.util.concurrent.ScheduledThreadPoolExecutor;
+import java.util.concurrent.ThreadFactory;
+
+/**
+ * Simple work queue to run tasks in the background
+ */
+class WorkQueue {
+ private static final ScheduledThreadPoolExecutor executor;
+
+ static final Object executorKiller;
+
+ static {
+ // To support garbage collection, start our thread but
+ // swap out the thread factory. When our class is GC'd
+ // the executorKiller will finalize and ask the executor
+ // to shutdown, ending the worker.
+ //
+ int threads = 1;
+ executor = new ScheduledThreadPoolExecutor(threads,
+ new ThreadFactory() {
+ private final ThreadFactory baseFactory = Executors
+ .defaultThreadFactory();
+
+ public Thread newThread(Runnable taskBody) {
+ Thread thr = baseFactory.newThread(taskBody);
+ thr.setName("JGit-WorkQueue"); //$NON-NLS-1$
+ thr.setDaemon(true);
+ return thr;
+ }
+ });
+ executor.setRemoveOnCancelPolicy(true);
+ executor.setContinueExistingPeriodicTasksAfterShutdownPolicy(false);
+ executor.setExecuteExistingDelayedTasksAfterShutdownPolicy(false);
+ executor.prestartAllCoreThreads();
+
+ // Now that the threads are running, its critical to swap out
+ // our own thread factory for one that isn't in the ClassLoader.
+ // This allows the class to GC.
+ //
+ executor.setThreadFactory(Executors.defaultThreadFactory());
+
+ executorKiller = new Object() {
+ @Override
+ protected void finalize() {
+ executor.shutdownNow();
+ }
+ };
+ }
+
+ static ScheduledThreadPoolExecutor getExecutor() {
+ return executor;
+ }
+}