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Reference Implementation for JSR 236 - Concurrency Utilities for Java EE
/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 2010-2013 Oracle and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
* or packager/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
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* file and include the License file at packager/legal/LICENSE.txt.
*
* GPL Classpath Exception:
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* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
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*/
package org.glassfish.enterprise.concurrent;
import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.SynchronousQueue;
import java.util.concurrent.TimeUnit;
import javax.enterprise.concurrent.ManagedExecutorService;
import org.glassfish.enterprise.concurrent.internal.ManagedFutureTask;
import org.glassfish.enterprise.concurrent.internal.ManagedThreadPoolExecutor;
/**
* Implementation of ManagedExecutorService interface. See {@code AbstractManagedExecutorService}.
*/
public class ManagedExecutorServiceImpl extends AbstractManagedExecutorService {
protected final ManagedThreadPoolExecutor threadPoolExecutor;
// The adapter to be returned to the caller needs to have all the lifecycle
// methods disabled
protected final ManagedExecutorServiceAdapter adapter;
public ManagedExecutorServiceImpl(String name,
ManagedThreadFactoryImpl managedThreadFactory,
long hungTaskThreshold,
boolean longRunningTasks,
int corePoolSize, int maxPoolSize, long keepAliveTime,
TimeUnit keepAliveTimeUnit,
long threadLifeTime,
ContextServiceImpl contextService,
RejectPolicy rejectPolicy,
BlockingQueue queue) {
super(name, managedThreadFactory, hungTaskThreshold, longRunningTasks,
contextService,
contextService != null? contextService.getContextSetupProvider(): null,
rejectPolicy);
threadPoolExecutor = new ManagedThreadPoolExecutor(corePoolSize, maxPoolSize,
keepAliveTime, keepAliveTimeUnit, queue,
this.managedThreadFactory);
threadPoolExecutor.setThreadLifeTime(threadLifeTime);
adapter = new ManagedExecutorServiceAdapter(this);
}
public ManagedExecutorServiceImpl(String name,
ManagedThreadFactoryImpl managedThreadFactory,
long hungTaskThreshold,
boolean longRunningTasks,
int corePoolSize, int maxPoolSize, long keepAliveTime,
TimeUnit keepAliveTimeUnit,
long threadLifeTime,
int queueCapacity,
ContextServiceImpl contextService,
RejectPolicy rejectPolicy) {
super(name, managedThreadFactory, hungTaskThreshold, longRunningTasks,
contextService,
contextService != null? contextService.getContextSetupProvider(): null,
rejectPolicy);
// Create a queue for ManagedThreadPoolExecutor based on the values
// of corePoolSize and queueCapacity.
// If queueCapacity is 0, or
// queueCapacity is Integer.MAX_VALUE and corePoolSize is 0,
// direct handoff queuing strategy will be used and a
// SynchronousQueue will be created.
// If queueCapacity is Integer.MAX_VALUE but corePoolSize is not 0,
// an unbounded queue will be used.
// For any other valid value for queueCapacity, a bounded queue
// wil be created.
if (queueCapacity < 0) {
throw new IllegalArgumentException();
}
BlockingQueue queue;
if (queueCapacity == Integer.MAX_VALUE) {
if (corePoolSize == 0) {
queue = new SynchronousQueue<>();
}
else {
queue = new LinkedBlockingQueue<>();
}
} else if (queueCapacity == 0) {
queue = new SynchronousQueue<>();
} else {
queue = new ArrayBlockingQueue<>(queueCapacity);
}
threadPoolExecutor = new ManagedThreadPoolExecutor(corePoolSize, maxPoolSize,
keepAliveTime, keepAliveTimeUnit, queue,
this.managedThreadFactory);
threadPoolExecutor.setThreadLifeTime(threadLifeTime);
adapter = new ManagedExecutorServiceAdapter(this);
}
@Override
public void execute(Runnable command) {
ManagedFutureTask task = getNewTaskFor(command, null);
task.submitted();
threadPoolExecutor.execute(task);
}
/**
* Returns an adapter for ManagedExecutorService instance which has its
* life cycle operations disabled.
*
* @return The ManagedExecutorService instance with life cycle operations
* disabled for use by application components.
**/
public ManagedExecutorServiceAdapter getAdapter() {
return adapter;
}
@Override
protected ExecutorService getThreadPoolExecutor() {
return threadPoolExecutor;
}
@Override
public ManagedExecutorService getExecutorForTaskListener() {
return adapter;
}
@Override
protected ManagedFutureTask getNewTaskFor(Runnable r, V result) {
return new ManagedFutureTask<>(this, r, result);
}
@Override
protected ManagedFutureTask getNewTaskFor(Callable callable) {
return new ManagedFutureTask(this, callable);
}
@Override
public long getTaskCount() {
return threadPoolExecutor.getTaskCount();
}
@Override
public long getCompletedTaskCount() {
return threadPoolExecutor.getCompletedTaskCount();
}
}