| /* |
| * 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; |
| } |
| } |