95 lines
3.5 KiB
Java
95 lines
3.5 KiB
Java
/*
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* Copyright (C) 2013 Dominik Schürmann <dominik@dominikschuermann.de>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package org.sufficientlysecure.keychain.util;
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import java.util.concurrent.BlockingQueue;
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import java.util.concurrent.RejectedExecutionHandler;
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import java.util.concurrent.ThreadFactory;
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import java.util.concurrent.ThreadPoolExecutor;
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import java.util.concurrent.TimeUnit;
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import java.util.concurrent.locks.Condition;
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import java.util.concurrent.locks.ReentrantLock;
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/**
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* Example from
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* http://docs.oracle.com/javase/1.5.0/docs/api/java/util/concurrent/ThreadPoolExecutor.html
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*/
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public class PausableThreadPoolExecutor extends ThreadPoolExecutor {
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public PausableThreadPoolExecutor(int corePoolSize, int maximumPoolSize, long keepAliveTime,
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TimeUnit unit, BlockingQueue<Runnable> workQueue,
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RejectedExecutionHandler handler) {
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super(corePoolSize, maximumPoolSize, keepAliveTime, unit, workQueue, handler);
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}
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public PausableThreadPoolExecutor(int corePoolSize, int maximumPoolSize, long keepAliveTime,
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TimeUnit unit, BlockingQueue<Runnable> workQueue,
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ThreadFactory threadFactory,
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RejectedExecutionHandler handler) {
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super(corePoolSize, maximumPoolSize, keepAliveTime, unit, workQueue, threadFactory, handler);
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}
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public PausableThreadPoolExecutor(int corePoolSize, int maximumPoolSize, long keepAliveTime,
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TimeUnit unit, BlockingQueue<Runnable> workQueue,
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ThreadFactory threadFactory) {
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super(corePoolSize, maximumPoolSize, keepAliveTime, unit, workQueue, threadFactory);
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}
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public PausableThreadPoolExecutor(int corePoolSize, int maximumPoolSize, long keepAliveTime,
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TimeUnit unit, BlockingQueue<Runnable> workQueue) {
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super(corePoolSize, maximumPoolSize, keepAliveTime, unit, workQueue);
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}
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private boolean mIsPaused;
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private ReentrantLock mPauseLock = new ReentrantLock();
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private Condition mUnPaused = mPauseLock.newCondition();
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protected void beforeExecute(Thread t, Runnable r) {
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super.beforeExecute(t, r);
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mPauseLock.lock();
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try {
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while (mIsPaused) {
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mUnPaused.await();
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}
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} catch (InterruptedException ie) {
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t.interrupt();
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} finally {
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mPauseLock.unlock();
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}
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}
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public void pause() {
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mPauseLock.lock();
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try {
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mIsPaused = true;
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} finally {
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mPauseLock.unlock();
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}
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}
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public void resume() {
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mPauseLock.lock();
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try {
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mIsPaused = false;
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mUnPaused.signalAll();
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} finally {
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mPauseLock.unlock();
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}
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}
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}
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