package future;

import java.util.Date;

/**

* 服务器

*

* @author wpy

*

*/

public class Service {

/**

* 1.服务器的处理某个业务，该业务可以分成AB两个过程，并且AB两个过程之间不需要彼此的返回结果

* 2.A过程需要1秒钟，B过程需要2秒钟，主线程其他操作2秒钟

*

* @param args

* @throws InterruptedException

*/

public static void main(String[] args) throws InterruptedException {

Service service = new Service();

long notUseFuture = service.notUseFuture();

System.out.println("==============================");

long useFuture = service.useFuture();

System.out.println("==============================");

System.out.println("notUseFuture整个业务耗时"+notUseFuture);

System.out.println("useFuture整个业务耗时"+useFuture);

}

public long useFuture() throws InterruptedException {

Date startOn = new Date();

String name = Thread.currentThread().getName();

final FutureDate futureDateA = new FutureDate<>();

final FutureDate futureDateB = new FutureDate<>();

Thread a = new Thread(new Runnable() {

@Override

public void run() {

String name = Thread.currentThread().getName();

System.out.println(name + ":任务A开始执行");

try {

Thread.sleep(1000);

} catch (InterruptedException e) {

e.printStackTrace();

}

futureDateA.setData(name + ":任务A执行结果");

System.out.println(name + ":任务A执行结束");

}

}, "线程A");

Thread b = new Thread(new Runnable() {

@Override

public void run() {

String name = Thread.currentThread().getName();

System.out.println(name + ":任务B开始执行");

try {

Thread.sleep(3000);

} catch (InterruptedException e) {

e.printStackTrace();

}

futureDateB.setData(name + ":任务B执行结果");

System.out.println(name + ":任务B执行结束");

}

}, "线程B");

Date before = new Date();

a.start();

b.start();

Date after = new Date();

System.out.println(name + ":a,b阻塞主线程时间:"

+ (after.getTime() - before.getTime()));

// 假设其他业务执行两秒钟

Thread.sleep(2000);

before = new Date();

String dataA = futureDateA.getData();

after = new Date();

System.out.println(name + ":获取A线程结果时间:"

+ (after.getTime() - before.getTime()));

before = new Date();

String dataB = futureDateB.getData();

after = new Date();

System.out.println(name + ":获取线程结果时间:"

+ (after.getTime() - before.getTime()));

System.out.println(name + ":A线程结果：" + dataA);

System.out.println(name + ":B线程结果：" + dataB);

Date endOn = new Date();

/*System.out.println(name + "整个业务耗时"

+ (endOn.getTime() - startOn.getTime()));*/

return endOn.getTime() - startOn.getTime();

}

public long notUseFuture() throws InterruptedException {

Date startOn = new Date();

// 任务A

String name = Thread.currentThread().getName();

System.out.println(name + ":任务A开始执行");

Thread.sleep(1000);

System.out.println(name + ":任务A执行结束");

// 任务B

System.out.println(name + ":任务B开始执行");

Thread.sleep(3000);

System.out.println(name + ":任务B执行结束");

// 主线程其他操作

Thread.sleep(2000);

Date endOn = new Date();

return endOn.getTime() - startOn.getTime();

}

}