Java 异步回调机制实例分析

/**
 * @author Jeff Lee
 * @since 2015-10-21 21:34:21
 * 回调模式-回调接口类
 */
public interface CSCallBack {
  public void process(String status);
}

/**
 * @author Jeff Lee
 * @since 2015-10-21 21:25:14
 * 回调模式-模拟客户端类
 */
public class Client implements CSCallBack {

  private Server server;

  public Client(Server server) {
    this.server = server;
  }

  public void sendMsg(final String msg){
    System.out.println("客户端：发送的消息为：" + msg);
    new Thread(new Runnable() {
      @Override
      public void run() {
        server.getClientMsg(Client.this,msg);
      }
    }).start();
    System.out.println("客户端：异步发送成功");
  }

  @Override
  public void process(String status) {
    System.out.println("客户端：服务端回调状态为：" + status);
  }
}

/**
 * @author Jeff Lee
 * @since 2015-10-21 21:24:15
 * 回调模式-模拟服务端类
 */
public class Server {

  public void getClientMsg(CSCallBack csCallBack , String msg) {
    System.out.println("服务端：服务端接收到客户端发送的消息为:" + msg);

    // 模拟服务端需要对数据处理
    try {
      Thread.sleep(5 * 1000);
    } catch (InterruptedException e) {
      e.printStackTrace();
    }
    System.out.println("服务端:数据处理成功，返回成功状态 200");
    String status = "200";
    csCallBack.process(status);
  }
}

/**
 * @author Jeff Lee
 * @since 2015-10-21 21:24:15
 * 回调模式-测试类
 */
public class CallBackTest {
  public static void main(String[] args) {
    Server server = new Server();
    Client client = new Client(server);

    client.sendMsg("Server,Hello~");
  }
}