/*
* JBoss, Home of Professional Open Source.
* Copyright 2011, Red Hat, Inc., and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.infinispan.server.commons.concurrent;
import java.util.Collections;
import java.util.LinkedList;
import java.util.List;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Future;
import java.util.concurrent.RejectedExecutionException;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ScheduledFuture;
import java.util.concurrent.TimeUnit;
/**
* ScheduledExecutorService decorator that records recurring tasks and cancels them on shutdown.
* @author Paul Ferraro
*/
public class ManagedScheduledExecutorService extends ManagedExecutorService implements ScheduledExecutorService {
private final List<Future<?>> futures = new LinkedList<>();
private volatile boolean shutdown = false;
private volatile boolean terminated = false;
private final ScheduledExecutorService executor;
public ManagedScheduledExecutorService(ScheduledExecutorService executor) {
super(executor);
this.executor = executor;
}
@Override
public void shutdown() {
this.shutdown(false);
}
@Override
public List<Runnable> shutdownNow() {
this.shutdown(true);
return Collections.emptyList();
}
private void shutdown(boolean interrupt) {
synchronized (this.futures) {
if (this.shutdown) return;
this.shutdown = true;
for (Future<?> future: this.futures) {
if (!future.isDone()) {
future.cancel(interrupt);
}
}
if (!interrupt) {
for (Future<?> future: this.futures) {
if (!future.isDone()) {
try {
future.get();
} catch (ExecutionException e) {
} catch (InterruptedException e) {
}
}
}
}
this.futures.clear();
this.terminated = true;
this.futures.notify();
}
}
@Override
public boolean isShutdown() {
return this.shutdown;
}
@Override
public boolean isTerminated() {
return this.terminated;
}
@Override
public boolean awaitTermination(long timeout, TimeUnit unit) throws InterruptedException {
if (this.terminated) return true;
synchronized (this.futures) {
this.futures.wait(unit.toMillis(timeout));
}
return this.terminated;
}
/**
* {@inheritDoc}
* @see java.util.concurrent.ScheduledExecutorService#schedule(java.lang.Runnable, long, java.util.concurrent.TimeUnit)
*/
@Override
public ScheduledFuture<?> schedule(Runnable command, long delay, TimeUnit unit) {
return this.executor.schedule(command, delay, unit);
}
/**
* {@inheritDoc}
* @see java.util.concurrent.ScheduledExecutorService#schedule(java.util.concurrent.Callable, long, java.util.concurrent.TimeUnit)
*/
@Override
public <V> ScheduledFuture<V> schedule(Callable<V> callable, long delay, TimeUnit unit) {
return this.executor.schedule(callable, delay, unit);
}
/**
* {@inheritDoc}
* @see java.util.concurrent.ScheduledExecutorService#scheduleAtFixedRate(java.lang.Runnable, long, long, java.util.concurrent.TimeUnit)
*/
@Override
public ScheduledFuture<?> scheduleAtFixedRate(Runnable command, long initialDelay, long period, TimeUnit unit) {
synchronized (this.futures) {
if (this.shutdown) throw new RejectedExecutionException();
ScheduledFuture<?> future = this.executor.scheduleAtFixedRate(command, initialDelay, period, unit);
this.futures.add(future);
return future;
}
}
/**
* {@inheritDoc}
* @see java.util.concurrent.ScheduledExecutorService#scheduleWithFixedDelay(java.lang.Runnable, long, long, java.util.concurrent.TimeUnit)
*/
@Override
public ScheduledFuture<?> scheduleWithFixedDelay(Runnable command, long initialDelay, long delay, TimeUnit unit) {
synchronized (this.futures) {
if (this.shutdown) throw new RejectedExecutionException();
ScheduledFuture<?> future = this.executor.scheduleWithFixedDelay(command, initialDelay, delay, unit);
this.futures.add(future);
return future;
}
}
}