/*
* 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.JBossThreadPoolExecutor;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.ThreadFactory;
import java.util.concurrent.TimeUnit;
/**
* Service responsible for creating, starting and stopping a thread pool executor with an unbounded queue.
*
* @author John E. Bailey
*/
public class UnboundedQueueThreadPoolService implements Service<ManagedJBossThreadPoolExecutorService> {
private final InjectedValue<ThreadFactory> threadFactoryValue = new InjectedValue<ThreadFactory>();
private ManagedJBossThreadPoolExecutorService executor;
private int maxThreads;
private TimeSpec keepAlive;
public UnboundedQueueThreadPoolService(int maxThreads, TimeSpec keepAlive) {
this.maxThreads = maxThreads;
this.keepAlive = keepAlive;
}
public synchronized void start(final StartContext context) throws StartException {
final TimeSpec keepAliveSpec = keepAlive;
long keepAliveTime = keepAliveSpec == null ? Long.MAX_VALUE : keepAliveSpec.getUnit().toNanos(keepAliveSpec.getDuration());
final JBossThreadPoolExecutor jbossExecutor = new JBossThreadPoolExecutor(maxThreads, maxThreads, keepAliveTime, TimeUnit.NANOSECONDS, new LinkedBlockingQueue<Runnable>(), threadFactoryValue.getValue());
executor = new ManagedJBossThreadPoolExecutorService(jbossExecutor);
}
public synchronized void stop(final StopContext context) {
final ManagedJBossThreadPoolExecutorService executor = this.executor;
if (executor == null) {
throw new IllegalStateException();
}
context.asynchronous();
executor.internalShutdown();
executor.addShutdownListener(new EventListener<StopContext>() {
public void handleEvent(final StopContext stopContext) {
stopContext.complete();
}
}, context);
this.executor = null;
}
public synchronized ManagedJBossThreadPoolExecutorService getValue() throws IllegalStateException {
final ManagedJBossThreadPoolExecutorService value = this.executor;
if (value == null) {
throw new IllegalStateException();
}
return value;
}
public Injector<ThreadFactory> getThreadFactoryInjector() {
return threadFactoryValue;
}
public synchronized void setMaxThreads(final int maxThreads) {
this.maxThreads = maxThreads;
final ManagedJBossThreadPoolExecutorService executor = this.executor;
if(executor != null) {
executor.setMaxThreads(maxThreads);
}
}
public synchronized void setKeepAlive(final TimeSpec keepAlive) {
this.keepAlive = keepAlive;
final ManagedJBossThreadPoolExecutorService executor = this.executor;
if(executor != null) {
executor.setKeepAlive(keepAlive);
}
}
public int getActiveCount() {
final ManagedJBossThreadPoolExecutorService executor = this.executor;
if(executor == null) {
throw new IllegalStateException("The exector service hasn't been initialized.");
}
return executor.getActiveCount();
}
public long getCompletedTaskCount() {
final ManagedJBossThreadPoolExecutorService executor = this.executor;
if(executor == null) {
throw new IllegalStateException("The exector service hasn't been initialized.");
}
return executor.getCompletedTaskCount();
}
public int getCurrentThreadCount() {
final ManagedJBossThreadPoolExecutorService executor = this.executor;
if(executor == null) {
throw new IllegalStateException("The exector service hasn't been initialized.");
}
return executor.getCurrentThreadCount();
}
public int getLargestPoolSize() {
final ManagedJBossThreadPoolExecutorService executor = this.executor;
if(executor == null) {
throw new IllegalStateException("The exector service hasn't been initialized.");
}
return executor.getLargestPoolSize();
}
public int getLargestThreadCount() {
final ManagedJBossThreadPoolExecutorService executor = this.executor;
if(executor == null) {
throw new IllegalStateException("The exector service hasn't been initialized.");
}
return executor.getLargestThreadCount();
}
public int getRejectedCount() {
final ManagedJBossThreadPoolExecutorService executor = this.executor;
if(executor == null) {
throw new IllegalStateException("The exector service hasn't been initialized.");
}
return executor.getRejectedCount();
}
public long getTaskCount() {
final ManagedJBossThreadPoolExecutorService executor = this.executor;
if(executor == null) {
throw new IllegalStateException("The exector service hasn't been initialized.");
}
return executor.getTaskCount();
}
TimeUnit getKeepAliveUnit() {
return keepAlive == null ? TimeSpec.DEFAULT_KEEPALIVE.getUnit() : keepAlive.getUnit();
}
}