用java实现一个线程连接池
来源:优易学  2011-1-19 12:08:37   【优易学:中国教育考试门户网】   资料下载   IT书店
  线程池:
  import java.util.LinkedList;
  public abstract class Manager {
  private String mThreadPoolName = null;
  private int mThreadPoolMaxSize = 1;
  private LinkedList workers = new LinkedList();
  public Manager() {
  }
  public Manager(String name, int poolMaxSize) {
  mThreadPoolName = name;
  createWorker(name, poolMaxSize);
  mThreadPoolMaxSize = poolMaxSize;
  }
  private void createWorker(int poolMaxSize) {
  for (int i = 0; i < poolMaxSize; i++) {
  Worker worker = new ...Worker(this);
  workers.addLast(worker);
  }
  }
  public synchronized Worker getIdleWorker() {
  return (Worker)workers.removeFirst();
  }
  public synchronized void notifyFree(Worker worker) {
  if (workers.size() < mThreadPoolMaxSize) {
  workers.addLast(worker);
  } else {
  worker = null;
  }
  }
  public int getThreadPoolMaxSize() {
  return mThreadPoolMaxSize;
  }
  public void setThreadPoolMaxSize(int threadPoolMaxSize) {
  this.mThreadPoolMaxSize = threadPoolMaxSize;
  }
  }
  线程抽象类
  public abstract class Worker implements Runnable {
  private Manager mManager = null;
  private Thread mThread = null;
  public Worker() {
  }
  public Worker(String threadName, Manager manager) {
  mManager = manager;
  mThread = new Thread(this, threadName);
  init();
  mThread.start();
  }
  public abstract void init();
  public void run() {
  while (true) {
  waitForStart();
  Worker worker = mManager.getIdleWorker();
  process();
  isRunning = false;
  mManager.notifyFree(worker);
  }
  }
  public abstract void process();
  public void start() {
  isRunning = true;
  mManager.getIdleWorker();
  notifyToStart();
  }
  public synchronized void waitForStart() {
  try {
  wait();
  } catch (InterruptedException ex) {
  }
  }
  public synchronized void notifyToStart() {
  notify();
  }
  }

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