Tomcat example source code file (MessageDispatch15Interceptor.java)

This example Tomcat source code file (MessageDispatch15Interceptor.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Tomcat tags/keywords

atomiclong, atomiclong, interceptorpayload, linkedblockingqueue, linkedblockingqueue, linkobject, linkobject, member, messagedispatch15interceptor, messagedispatchinterceptor, runnable, runnable, threading, threadpoolexecutor, threads

The Tomcat MessageDispatch15Interceptor.java source code

/*
 * 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
 */
package org.apache.catalina.tribes.group.interceptors;

import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.atomic.AtomicLong;

import org.apache.catalina.tribes.ChannelMessage;
import org.apache.catalina.tribes.Member;
import org.apache.catalina.tribes.group.InterceptorPayload;
import org.apache.catalina.tribes.transport.bio.util.LinkObject;
import java.util.concurrent.TimeUnit;

/**
 * 
 * Same implementation as the MessageDispatchInterceptor
 * except is ues an atomic long for the currentSize calculation
 * and uses a thread pool for message sending.
 * 
 * @author Filip Hanik
 * @version 1.0
 */

public class MessageDispatch15Interceptor extends MessageDispatchInterceptor {

    protected AtomicLong currentSize = new AtomicLong(0);
    protected ThreadPoolExecutor executor = null;
    protected int maxThreads = 10;
    protected int maxSpareThreads = 2;
    protected long keepAliveTime = 5000;
    protected LinkedBlockingQueue<Runnable> runnablequeue = new LinkedBlockingQueue();

    public long getCurrentSize() {
        return currentSize.get();
    }

    public long addAndGetCurrentSize(long inc) {
        return currentSize.addAndGet(inc);
    }

    public long setAndGetCurrentSize(long value) {
        currentSize.set(value);
        return value;
    }
    
    public boolean addToQueue(ChannelMessage msg, Member[] destination, InterceptorPayload payload) {
        final LinkObject obj = new LinkObject(msg,destination,payload);
        Runnable r = new Runnable() {
            public void run() {
                sendAsyncData(obj);
            }
        };
        executor.execute(r);
        return true;
    }

    public LinkObject removeFromQueue() {
        return null; //not used, thread pool contains its own queue.
    }

    public void startQueue() {
        if ( run ) return;
        executor = new ThreadPoolExecutor(maxSpareThreads,maxThreads,keepAliveTime,TimeUnit.MILLISECONDS,runnablequeue);
        run = true;
    }

    public void stopQueue() {
        run = false;
        executor.shutdownNow();
        setAndGetCurrentSize(0);
        runnablequeue.clear();
    }

    public long getKeepAliveTime() {
        return keepAliveTime;
    }

    public int getMaxSpareThreads() {
        return maxSpareThreads;
    }

    public int getMaxThreads() {
        return maxThreads;
    }

    public void setKeepAliveTime(long keepAliveTime) {
        this.keepAliveTime = keepAliveTime;
    }

    public void setMaxSpareThreads(int maxSpareThreads) {
        this.maxSpareThreads = maxSpareThreads;
    }

    public void setMaxThreads(int maxThreads) {
        this.maxThreads = maxThreads;
    }

}