線程池管理

package test.dao;

import java.util.LinkedList;

import org.apache.log4j.Logger;


/**
 *
 * @author Andy.xiaomeng
 *
 */
public class ThreadPool {

    private static final Logger Log = Logger.getLogger(ThreadPool.class);

    private ThreadWorker[] worker;
    private LinkedList<Runnable> queue;
    private int poolSize;

    public int getPoolSize(){
        return poolSize;
    }

    //initialize thread pool with pool size
    public ThreadPool(int size){

        poolSize = size;
        worker = new ThreadWorker[size];
        queue = new LinkedList<Runnable>();

        for (int i = 0; i < size; i++) {
            worker[i] = new ThreadWorker();
            worker[i].start();
        }

    }



    //add work queue
    public void addQueue(Runnable runnable){
        synchronized(queue) {
            queue.add(runnable);
            queue.notify();
        }
    }

    //worker do work
    private class ThreadWorker extends Thread{

        public void run(){

            //runnable
            Runnable runable;

            while (true) {

                synchronized(queue) {
                    while (queue.isEmpty()) {
                        try
                        {
                            //is work queue is empty, wait
                            queue.wait();
                        }
                        catch (Exception e)
                        {
                            Log.error("pool queue wait", e);
                        }
                    }

                    //get work in queue, and remove it
                    runable = queue.removeFirst();
                }

                try {
                    //do work
                    runable.run();
                }
                catch (RuntimeException e) {
                    Log.error("unknow runtime exception", e);
                }

            }
        }

    }

    public static void main(String[] args) {

        //test
        ThreadPool pool = new ThreadPool(111);


        //
        class SSS implements Runnable{
            private String abc;
            public void setAbc(String aaaaa){
                this.abc = aaaaa;
            }

            public void run() {
                System.out.println("do runnable " + abc);
            }
        }

        for (int i = 0; i < 200; i++) {
            SSS a = new SSS();
            a.setAbc(String.valueOf(i + 1));
            pool.addQueue(a);
        }

    }
}