iothread.java

this is a trade sale system realized by java. It can run some easy functions and has a good design p

package trader.nw;

import java.io.*;
import java.net.*;

class IoThread extends Thread {
  private Socket skt = null;
  private IoStrategy ioServer;
  private int ioThreadId;
  private static int ioThreadCounter = 1; 
  

  public IoThread(IoStrategy ioServer) {
    this.ioServer = ioServer;
    ioThreadId = ioThreadCounter++;
  }

  public boolean isIdle() {
    return skt == null;
  }

  public synchronized  void setSocket(Socket s) {
    if (skt == null) {
       skt = s;
       notify();
    }
        // else -- log error
  }

  public synchronized void run() {
    while (true) {
      try {
        System.out.println("IoThread " + ioThreadId + 
          " entering into wait state");
        wait();
        System.out.println("IoThread " + ioThreadId + 
          " left wait state to service client");
        ioServer.ioService(skt);
        skt = null;
      } catch(Exception e) {
        e.printStackTrace();
      }
    }
  } 
}