/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.axis2.transport.nhttp.util;
import edu.emory.mathcs.backport.java.util.concurrent.Executor;
import edu.emory.mathcs.backport.java.util.concurrent.LinkedBlockingQueue;
import edu.emory.mathcs.backport.java.util.concurrent.ThreadFactory;
import edu.emory.mathcs.backport.java.util.concurrent.ThreadPoolExecutor;
import edu.emory.mathcs.backport.java.util.concurrent.TimeUnit;
import edu.emory.mathcs.backport.java.util.concurrent.atomic.AtomicInteger;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
/**
* Utility class to support the backport util.concurrent in JDK 1.4 and the
* native concurrent package in JDK 1.5 or later
*/
public class BackportWorkerPool implements WorkerPool{
private static final Log log = LogFactory.getLog(BackportWorkerPool.class);
Executor executor = null;
public BackportWorkerPool(int core, int max, int keepAlive,
int queueLength, String threadGroupName, String threadGroupId) {
log.debug("Using backport of the util.concurrent package..");
executor = new ThreadPoolExecutor(
core, max, keepAlive,
TimeUnit.SECONDS,
queueLength == -1 ?
new LinkedBlockingQueue() :
new LinkedBlockingQueue(queueLength),
new BackportThreadFactory(new ThreadGroup(threadGroupName), threadGroupId));
}
public void execute(Runnable task) {
executor.execute(task);
}
/**
* This is a simple ThreadFactory implementation using java.util.concurrent
* Creates threads with the given name prefix
*/
public class BackportThreadFactory implements
ThreadFactory {
final ThreadGroup group;
final AtomicInteger count;
final String namePrefix;
public BackportThreadFactory(final ThreadGroup group, final String namePrefix) {
super();
this.count = new AtomicInteger(1);
this.group = group;
this.namePrefix = namePrefix;
}
public Thread newThread(final Runnable runnable) {
StringBuffer buffer = new StringBuffer();
buffer.append(this.namePrefix);
buffer.append('-');
buffer.append(this.count.getAndIncrement());
Thread t = new Thread(group, runnable, buffer.toString(), 0);
t.setDaemon(false);
t.setPriority(Thread.NORM_PRIORITY);
return t;
}
}
}