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/*
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright 2007-2008 Sun Microsystems, Inc. All rights reserved.
*
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* 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.html
* or glassfish/bootstrap/legal/LICENSE.txt. See the License for the specific
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*
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* file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
* Sun designates this particular file as subject to the "Classpath" exception
* as provided by Sun in the GPL Version 2 section of the License file that
* accompanied this code. If applicable, add the following below the License
* Header, with the fields enclosed by brackets [] replaced by your own
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package com.sun.grizzly;
import com.sun.grizzly.util.ByteBufferFactory.ByteBufferType;
import com.sun.grizzly.util.WorkerThreadImpl;
import java.util.concurrent.Callable;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.ThreadFactory;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;
/**
* {@link Pipeline} implementation, based on {@link ThreadPoolExecutor}
*
* @author Alexey Stashok
*/
public class ThreadPoolExecutorServicePipeline extends ThreadPoolExecutor
implements Pipeline {
// Min number of worker threads in a pool
private static int DEFAULT_MIN_THREAD_COUNT = 5;
// Max number of worker threads in a pool
private static int DEFAULT_MAX_THREAD_COUNT = 20;
// Max number of tasks thread pool can enqueue
private static int DEFAULT_MAX_TASKS_QUEUED = Integer.MAX_VALUE;
// Timeout, after which idle thread will be stopped and excluded from pool
private static int DEFAULT_IDLE_THREAD_KEEPALIVE_TIMEOUT = 30000;
private String name;
/**
* The port used.
*/
protected int port;
private int maxTasksCount;
private AtomicInteger workerThreadCounter = new AtomicInteger();
/**
* The Thread Priority
*/
protected int priority;
/**
* The initial ByteBuffer size for newly created WorkerThread instances
*/
protected int initialByteBufferSize = 8192;
/**
* The {@link ByteBufferType}
*/
private ByteBufferType byteBufferType = ByteBufferType.HEAP_VIEW;
public ThreadPoolExecutorServicePipeline() {
this(DEFAULT_MIN_THREAD_COUNT, DEFAULT_MAX_THREAD_COUNT,
DEFAULT_MAX_TASKS_QUEUED, DEFAULT_IDLE_THREAD_KEEPALIVE_TIMEOUT,
TimeUnit.MILLISECONDS);
}
public ThreadPoolExecutorServicePipeline(int minThreads,
int maxThreads, int maxTasksCount, long keepAliveTime,
TimeUnit unit) {
this(minThreads, maxThreads, maxTasksCount, keepAliveTime, unit,
"Grizzly", 8080, Thread.NORM_PRIORITY);
}
public ThreadPoolExecutorServicePipeline(int minThreads,
int maxThreads, int maxTasksCount, long keepAliveTime,
TimeUnit unit, String name, int port, int priority) {
super(minThreads, maxThreads, keepAliveTime, unit,
new LinkedBlockingQueue(maxTasksCount));
setThreadFactory(new WorkerThreadFactory(this));
this.maxTasksCount = maxTasksCount;
this.name = name;
this.port = port;
this.priority = priority;
}
/**
* Set the name of this {@link Pipeline}
* @param name Pipeline name to use
*/
public synchronized void setName(String name){
this.name = name;
}
/**
* Return the name of this {@link Pipeline}
* @return the name of this {@link Pipeline}
*/
public synchronized String getName(){
return name+port;
}
/**
* Set the port used by this {@link Pipeline}
* @param port the port used by this {@link Pipeline}
*/
public synchronized void setPort(int port){
this.port = port;
}
/**
* {@inheritDoc}
*/
public void execute(Callable task) throws PipelineFullException {
submit(task);
}
/**
* {@inheritDoc}
*/
public Callable waitForIoTask() {
Callable callable = null;
try {
final Runnable r = this.getQueue().take();
if (r != null) {
callable = new Callable() {
public Object call() throws Exception {
r.run();
return null;
}
};
}
} catch (InterruptedException e) {
}
return callable;
}
/**
* {@inheritDoc}
*/
public int getWaitingThread() {
int waitingThreads = getPoolSize() - getActiveCount();
if (waitingThreads < 0) waitingThreads = 0;
return waitingThreads;
}
/**
* {@inheritDoc}
*/
public int getMaxThreads() {
return getMaximumPoolSize();
}
/**
* {@inheritDoc}
*/
public void setMaxThreads(int maxThread) {
setMaximumPoolSize(maxThread);
}
/**
* {@inheritDoc}
*/
public int getCurrentThreadCount() {
return getPoolSize();
}
/**
* {@inheritDoc}
*/
public int getCurrentThreadsBusy() {
return getActiveCount();
}
/**
* {@inheritDoc}
*/
public void initPipeline() {
}
/**
* {@inheritDoc}
*/
public void startPipeline() {
this.prestartCoreThread();
}
/**
* {@inheritDoc}
*/
public void stopPipeline() {
shutdownNow();
}
/**
* Set the thread priority of the {@link Pipeline}
* @param priority thread priority to use
*/
public synchronized void setPriority(int priority){
this.priority = priority;
}
/**
* {@inheritDoc}
*/
public void setMinThreads(int minThread) {
setCorePoolSize(minThread);
}
/**
* Get the maximum pending connections this {@link Pipeline}
* can handle.
* @return maximum queue size (in bytes) this Pipeline is using
*/
public synchronized int getMaxQueueSize(){
return maxTasksCount;
}
/**
* Is not supported for the ThreadPoolExecutorServicePipeline.
* The value, passed to the cosntructor could not be changed at the runtime.
*
* @param maxQueue
*/
public void setMaxQueueSize(int maxQueue) {
throw new UnsupportedOperationException("Value could not be changed!");
}
/**
* Is not supported for the ThreadPoolExecutorServicePipeline.
* @param threadIncrements
*/
public void setThreadsIncrement(int threadIncrements) {
throw new UnsupportedOperationException("Not supported.");
}
/**
* {@inheritDoc}
*/
public int size() {
return getQueue().size();
}
/**
* The {@link ByteBufferTypel} used to create the {@link ByteBuffer}
* associated with {@link WorkerThreadImpl}s created by this instance.
* @return The {@link ByteBufferTypel} used to create the {@link ByteBuffer}
* associated with {@link WorkerThreadImpl}s created by this instance.
*/
public ByteBufferType getByteBufferType() {
return byteBufferType;
}
/**
* Set the {@link ByteBufferTypel} to use when creating the
* {@link ByteBuffer} associated with {@link WorkerThreadImpl}s
* created by this instance.
* @param byteBufferType The ByteBuffer type.
*/
public void setByteBufferType(ByteBufferType byteBufferType) {
this.byteBufferType = byteBufferType;
}
/**
* Get the initial WorkerThreadImpl {@link ByteBuffer} size
* @return initial WorkerThreadImpl ByteBuffwaitingThreadser size
*/
public synchronized int getInitialByteBufferSize(){
return initialByteBufferSize;
}
/**
* Set the initial WorkerThreadImpl {@link ByteBuffer} size
* @param size initial WorkerThreadImpl {@link ByteBuffer} size
*/
public synchronized void setInitialByteBufferSize(int size){
initialByteBufferSize = size;
}
protected static class WorkerThreadFactory implements ThreadFactory {
private ThreadPoolExecutorServicePipeline threadPool;
public WorkerThreadFactory(
ThreadPoolExecutorServicePipeline threadPool) {
this.threadPool = threadPool;
}
public Thread newThread(Runnable r) {
WorkerThreadImpl workerThread = new WorkerThreadImpl(threadPool,
threadPool.name + "WorkerThread-" + threadPool.port + "-" +
threadPool.workerThreadCounter.getAndIncrement(), r,
threadPool.initialByteBufferSize);
workerThread.setByteBufferType(threadPool.byteBufferType);
workerThread.setPriority(threadPool.priority);
return workerThread;
}
}
}
