Future模式实例

Future模式

/**
 * qccr.com Inc.
 * Copyright (c) 2014-2016 All Rights Reserved.
 */
package com.youqianhuan.future;

/**
 * 数据处理接口
 * @author chenghuanhuan@qccr.com
 * @since $Revision:1.0.0, $Date: 2017年03月05日 上午9:54 $
 */
public interface Data {

    /**
     * 获取请求数据
     * @return
     */
    Object getReuqestData();
}

/**
 * qccr.com Inc.
 * Copyright (c) 2014-2016 All Rights Reserved.
 */
package com.youqianhuan.future;

/**
 * @author chenghuanhuan@qccr.com
 * @since $Revision:1.0.0, $Date: 2017年03月05日 上午9:58 $
 */
public class RealData implements Data {

    // 处理结果
    private Object result;

    public RealData(String request){
        // 处理真实逻辑
        System.out.println("处理真实逻辑!");
        execute(request);
    }

    public Object getReuqestData() {
        return result;
    }

    public void execute(String data){

        System.out.println("处理中....1");
        try {
            Thread.sleep(1000);
            System.out.println("处理中....2");
            Thread.sleep(2000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        result = data;
    }
}

/**
 * qccr.com Inc.
 * Copyright (c) 2014-2016 All Rights Reserved.
 */
package com.youqianhuan.future;

/**
 * @author chenghuanhuan@qccr.com
 * @since $Revision:1.0.0, $Date: 2017年03月05日 上午9:56 $
 */
public class FutureData implements Data {

    private RealData realData;

    private boolean isReady = false;

    /**
     * 设置真实的处理类
     * @param realData
     */
    public synchronized void setRealData(RealData realData){
        if (isReady){
            return;
        }
        this.realData = realData;
        isReady = true;

        // 进行通知
        notify();
    }

    /**
     * 获取处理结果
     * @return
     */
    public synchronized Object getReuqestData() {

        while (!isReady){
            try {
                wait();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }

        return this.realData.getReuqestData();
    }
}

/**
 * qccr.com Inc.
 * Copyright (c) 2014-2016 All Rights Reserved.
 */
package com.youqianhuan.future;

/**
 * 处理客户端
 * @author chenghuanhuan@qccr.com
 * @since $Revision:1.0.0, $Date: 2017年03月05日 上午9:52 $
 */
public class FutureClient {
    public static Data reuquest(final String request){
        final FutureData futureData = new FutureData();

        new Thread(new Runnable() {
            public void run() {
                RealData realData = new RealData(request);
                futureData.setRealData(realData);
            }
        }).start();

        return futureData;
    }
}

/**
 * qccr.com Inc.
 * Copyright (c) 2014-2016 All Rights Reserved.
 */
package com.youqianhuan.future;

/**
 * @author chenghuanhuan@qccr.com
 * @since $Revision:1.0.0, $Date: 2017年03月05日 上午10:17 $
 */
public class Main {
    public static void main(String[] args) {

        Data futureData = FutureClient.reuquest("hahhahah");

        System.out.println(futureData.getReuqestData());

    }
}