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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
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* file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
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* Header, with the fields enclosed by brackets [] replaced by your own
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package com.sun.grizzly.util;
import com.sun.grizzly.tcp.PendingIOhandler;
import java.util.concurrent.Callable;
import com.sun.grizzly.util.ByteBufferFactory.ByteBufferType;
import com.sun.grizzly.util.ThreadAttachment.Mode;
import java.util.concurrent.ExecutorService;
/**
* Simple worker thread used for processing HTTP requests. All threads are
* synchronized using a {@link ExecutorService} object
*
* @author Jean-Francois Arcand
*/
public class WorkerThreadImpl extends WorkerThread {
public static final int DEFAULT_BYTE_BUFFER_SIZE = 8192;
public static final ByteBufferType DEFAULT_BYTEBUFFER_TYPE = ByteBufferType.HEAP_VIEW;;
/**
* The {@link ExecutorService} on which this thread synchronize.
*/
protected ExecutorService threadPool;
/**
* The ThreadGroup used.
*/
protected final static ThreadGroup threadGroup = new ThreadGroup("Grizzly");
/**
* The state/attributes on this WorkerThread.
*/
protected ThreadAttachment threadAttachment;
/**
* The ByteBufferType used when creating the ByteBuffer attached to this object.
*/
private ByteBufferType byteBufferType = ByteBufferType.HEAP_VIEW;
/**
* The size of the ByteBuffer attached to this object.
*/
private int initialByteBufferSize;
/**
* Used by selectionkey attachments to enqueue io events that will be executed in
* selectorhandler.postselect by worker threads instead of the selector thread.
*/
private PendingIOhandler pendingIOhandler;
private Object context;
/**
* Create a Thread that will synchronizes/block on
* {@link ExecutorService} instance.
* @param threadGroup ThreadGroup
* @param runnable Runnable
*/
public WorkerThreadImpl(ThreadGroup threadGroup, Runnable runnable){
this(threadGroup, runnable, DEFAULT_BYTE_BUFFER_SIZE);
}
public WorkerThreadImpl(Runnable runnable){
this(null, "workerthread", runnable, 0);
}
public WorkerThreadImpl(String name, Runnable runnable){
this(null, name, runnable, 0);
}
/**
* Create a Thread that will synchronizes/block on
* {@link ExecutorService} instance.
* @param threadGroup ThreadGroup
* @param runnable Runnable
* @param initialByteBufferSize initial {@link ByteBuffer} size
*/
public WorkerThreadImpl(ThreadGroup threadGroup, Runnable runnable,
int initialByteBufferSize){
super(threadGroup, runnable);
this.initialByteBufferSize = initialByteBufferSize;
}
/**
* Create a Thread that will synchronizes/block on
* {@link ExecutorService} instance.
* @param threadPool {@link ExecutorService}
* @param name String
*/
public WorkerThreadImpl(ExecutorService threadPool, String name){
this(threadPool, name, DEFAULT_BYTE_BUFFER_SIZE);
}
/**
* Create a Thread that will synchronizes/block on
* {@link ExecutorService} instance.
* @param threadPool {@link ExecutorService}
* @param name String
* @param initialByteBufferSize initial {@link ByteBuffer} size
*/
public WorkerThreadImpl(ExecutorService threadPool, String name,
int initialByteBufferSize){
super(threadGroup, name);
this.threadPool = threadPool;
this.initialByteBufferSize = initialByteBufferSize;
}
/**
* Create a Thread that will synchronizes/block on
* {@link ExecutorService} instance.
* @param threadPool {@link ExecutorService}
* @param name String
* @param initialByteBufferSize initial {@link ByteBuffer} size
*/
public WorkerThreadImpl(ExecutorService threadPool, String name,
Runnable runnable, int initialByteBufferSize){
super(threadGroup, runnable, name);
this.threadPool = threadPool;
this.initialByteBufferSize = initialByteBufferSize;
}
/**
* Allocate a {@link ByteBuffer} if the current instance is null;
*/
protected void createByteBuffer(boolean force){
if (force || byteBuffer == null){
byteBuffer = ByteBufferFactory.allocate(byteBufferType,
initialByteBufferSize);
}
}
public ThreadAttachment updateAttachment(int mode) {
ThreadAttachment currentAttachment = getAttachment();
currentAttachment.reset();
if ((mode & Mode.BYTE_BUFFER) != 0) {
currentAttachment.setByteBuffer(byteBuffer);
}
if ((mode & Mode.SSL_ENGINE) != 0) {
currentAttachment.setSSLEngine(sslEngine);
}
if ((mode & Mode.INPUT_BB) != 0) {
currentAttachment.setInputBB(inputBB);
}
if ((mode & Mode.OUTPUT_BB) != 0) {
currentAttachment.setOutputBB(outputBB);
}
currentAttachment.setMode(mode);
return currentAttachment;
}
public ThreadAttachment getAttachment() {
if (threadAttachment == null) {
threadAttachment = new ThreadAttachment();
threadAttachment.associate();
}
return threadAttachment;
}
public ThreadAttachment detach() {
ThreadAttachment currentAttachment = getAttachment();
int mode = currentAttachment.getMode();
updateAttachment(mode);
// Re-create a new ByteBuffer
if ((mode & Mode.BYTE_BUFFER) != 0) {
byteBuffer = null;
}
if ((mode & Mode.SSL_ENGINE) != 0) {
sslEngine = null;
}
if ((mode & Mode.INPUT_BB) != 0) {
inputBB = null;
}
if ((mode & Mode.OUTPUT_BB) != 0) {
outputBB = null;
}
// Switch to the new ThreadAttachment.
this.threadAttachment = null;
currentAttachment.deassociate();
return currentAttachment;
}
public void attach(ThreadAttachment threadAttachment) {
threadAttachment.associate();
int mode = threadAttachment.getMode();
if ((mode & Mode.BYTE_BUFFER) != 0) {
byteBuffer = threadAttachment.getByteBuffer();
}
if ((mode & Mode.SSL_ENGINE) != 0) {
sslEngine = threadAttachment.getSSLEngine();
}
if ((mode & Mode.INPUT_BB) != 0) {
inputBB = threadAttachment.getInputBB();
}
if ((mode & Mode.OUTPUT_BB) != 0) {
outputBB = threadAttachment.getOutputBB();
}
this.threadAttachment = threadAttachment;
}
/**
* The ByteBufferType used to create the {@link ByteBuffer}
* associated with this object.
* @return The ByteBufferType used to create the {@link ByteBuffer}
* associated with this object.
*/
public ByteBufferType getByteBufferType() {
return byteBufferType;
}
/**
* Set the ByteBufferType to use when creating the
* {@link ByteBuffer} associated with this object.
* @param byteBufferType The ByteBuffer type.
*/
public void setByteBufferType(ByteBufferType byteBufferType) {
this.byteBufferType = byteBufferType;
}
/**
* Processes the given task.
*
* @param t the task to process
*/
protected void processTask(Callable t) throws Exception {
if (t != null){
t.call();
}
}
/**
* Used by selectionkey attachments to enqueue io events that will be executed in
* selectorhandler.postselect by worker threads instead of the selector thread.
*/
public PendingIOhandler getPendingIOhandler() {
return pendingIOhandler;
}
/**
* Used by selectionkey attachments to enqueue io events that will be executed in
* selectorhandler.postselect by worker threads instead of the selector thread.
*/
public void setPendingIOhandler(PendingIOhandler pendingIOhandler) {
this.pendingIOhandler = pendingIOhandler;
}
public Object getContext() {
return context;
}
public void setContext(Object context) {
this.context = context;
}
@Override
public void reset() {
if (threadAttachment != null) {
/**
* ThreadAttachment was created during prev. processing and wasn't
* detached. It could happen due to some error - we need to release
* the ThreadAttachment association with the current thread
*/
threadAttachment.deassociate();
}
threadAttachment = null;
super.reset();
}
}
