/*
* JBoss, Home of Professional Open Source.
* Copyright 2010, 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.jboss.as.threads;
import org.jboss.msc.inject.Injector;
import org.jboss.msc.service.Service;
import org.jboss.msc.service.StartContext;
import org.jboss.msc.service.StartException;
import org.jboss.msc.service.StopContext;
import org.jboss.msc.value.InjectedValue;
import org.jboss.threads.EventListener;
import org.jboss.threads.JBossExecutors;
import org.jboss.threads.QueueExecutor;
import java.util.concurrent.Executor;
import java.util.concurrent.ThreadFactory;
/**
* Service responsible for creating, starting and stopping a thread pool executor with a bounded queue.
*
* @author John E. Bailey
*/
public class BoundedQueueThreadPoolService implements Service<Executor> {
private final InjectedValue<ThreadFactory> threadFactoryValue = new InjectedValue<ThreadFactory>();
private final InjectedValue<Executor> handoffExecutorValue = new InjectedValue<Executor>();
private QueueExecutor executor;
private Executor value;
private int coreThreads;
private int maxThreads;
private int queueLength;
private boolean blocking;
private TimeSpec keepAlive;
private boolean allowCoreTimeout;
public BoundedQueueThreadPoolService(int coreThreads, int maxThreads, int queueLength, boolean blocking, TimeSpec keepAlive, boolean allowCoreTimeout) {
this.coreThreads = coreThreads;
this.maxThreads = maxThreads;
this.queueLength = queueLength;
this.blocking = blocking;
this.keepAlive = keepAlive;
this.allowCoreTimeout = allowCoreTimeout;
}
public synchronized void start(final StartContext context) throws StartException {
executor = new QueueExecutor(coreThreads, maxThreads, keepAlive.getDuration(), keepAlive.getUnit(), queueLength, threadFactoryValue.getValue(), blocking, handoffExecutorValue.getOptionalValue());
executor.setAllowCoreThreadTimeout(allowCoreTimeout);
value = JBossExecutors.protectedBlockingExecutor(executor);
}
public synchronized void stop(final StopContext context) {
final QueueExecutor executor = this.executor;
if (executor == null) {
throw new IllegalStateException();
}
context.asynchronous();
executor.shutdown();
executor.addShutdownListener(new EventListener<StopContext>() {
public void handleEvent(final StopContext stopContext) {
stopContext.complete();
}
}, context);
this.executor = null;
value = null;
}
public synchronized Executor getValue() throws IllegalStateException {
final Executor value = this.value;
if (value == null) {
throw new IllegalStateException();
}
return value;
}
public Injector<ThreadFactory> getThreadFactoryInjector() {
return threadFactoryValue;
}
public Injector<Executor> getHandoffExecutorInjector() {
return handoffExecutorValue;
}
public synchronized void setCoreThreads(int coreThreads) {
this.coreThreads = coreThreads;
final QueueExecutor executor = this.executor;
if(executor != null) {
executor.setCoreThreads(coreThreads);
}
}
public synchronized void setMaxThreads(int maxThreads) {
this.maxThreads = maxThreads;
final QueueExecutor executor = this.executor;
if(executor != null) {
executor.setMaxThreads(maxThreads);
}
}
public synchronized void setQueueLength(int queueLength) {
this.queueLength = queueLength;
// TODO: update the executor queue
}
public synchronized void setBlocking(boolean blocking) {
this.blocking = blocking;
final QueueExecutor executor = this.executor;
if(executor != null) {
executor.setBlocking(blocking);
}
}
public synchronized void setKeepAlive(TimeSpec keepAlive) {
this.keepAlive = keepAlive;
final QueueExecutor executor = this.executor;
if(executor != null) {
executor.setKeepAliveTime(keepAlive.getDuration(), keepAlive.getUnit());
}
}
public synchronized void setAllowCoreTimeout(boolean allowCoreTimeout) {
this.allowCoreTimeout = allowCoreTimeout;
final QueueExecutor executor = this.executor;
if(executor != null) {
executor.setAllowCoreThreadTimeout(allowCoreTimeout);
}
}
}