package com.xunqi.gulimall.search.thread;
import java.util.concurrent.*;
/**
* @Description:
* @Created: with IntelliJ IDEA.
* @author: 阿伦啊
* @createTime: 2021-06-18 11:16
**/
public class ThreadTest {
public static ExecutorService executor = Executors.newFixedThreadPool(10);
public static void main(String[] args) throws ExecutionException, InterruptedException {
// System.out.println("main......start.....");
// Thread thread = new Thread01();
// thread.start();
// System.out.println("main......end.....");
// Runable01 runable01 = new Runable01();
// new Thread(runable01).start();
// FutureTask<Integer> futureTask = new FutureTask<>(new Callable01());
// new Thread(futureTask).start();
// System.out.println(futureTask.get());
// service.execute(new Runable01());
// Future<Integer> submit = service.submit(new Callable01());
// submit.get();
System.out.println("main......start.....");
// CompletableFuture<Void> future = CompletableFuture.runAsync(() -> {
// System.out.println("当前线程：" + Thread.currentThread().getId());
// int i = 10 / 2;
// System.out.println("运行结果：" + i);
// }, executor);
/**
* 方法完成后的处理
*/
// CompletableFuture<Integer> future = CompletableFuture.supplyAsync(() -> {
// System.out.println("当前线程：" + Thread.currentThread().getId());
// int i = 10 / 0;
// System.out.println("运行结果：" + i);
// return i;
// }, executor).whenComplete((res,exception) -> {
// //虽然能得到异常信息，但是没法修改返回数据
// System.out.println("异步任务成功完成了...结果是：" + res + "异常是：" + exception);
// }).exceptionally(throwable -> {
// //可以感知异常，同时返回默认值
// return 10;
// });
/**
* 方法执行完后端处理
*/
// CompletableFuture<Integer> future = CompletableFuture.supplyAsync(() -> {
// System.out.println("当前线程：" + Thread.currentThread().getId());
// int i = 10 / 2;
// System.out.println("运行结果：" + i);
// return i;
// }, executor).handle((result,thr) -> {
// if (result != null) {
// return result * 2;
// }
// if (thr != null) {
// System.out.println("异步任务成功完成了...结果是：" + result + "异常是：" + thr);
// return 0;
// }
// return 0;
// });
/**
* 两个任务都完成
*/
// CompletableFuture<Object> future01 = CompletableFuture.supplyAsync(() -> {
// System.out.println("任务一线程：" + Thread.currentThread().getId());
// int i = 10 / 4;
// System.out.println("任务一结束：");
// return i;
// }, executor);
//
// CompletableFuture<Object> future02 = CompletableFuture.supplyAsync(() -> {
// System.out.println("任务二线程：" + Thread.currentThread().getId());
// try {
// Thread.sleep(1000);
// } catch (InterruptedException e) {
// e.printStackTrace();
// }
// System.out.println("任务二结束：");
// return "Hello ";
// }, executor);
//不能接受返回值
// future01.runAfterBothAsync(future02,()->{
// System.out.println("任务三开始");
// },executor);
//能获取前两个任务的返回值
// future01.thenAcceptBothAsync(future02,(f1, f2)->{
// System.out.println("任务三开始。。。之前的结果："+f1+"----->"+f2);
// },executor);
//能获取到前两个任务的返回值，并且自己也能有返回值
// future01.thenCombineAsync(future02,(f1,f2)->{
// return f1 + ": "+ f2 + " Haha";
// },executor);
/**
* 两个任务，只要有一个完成，就执行任务3
* runAfterEitherAsync;不感知结果，自己也无返回值
* acceptEitherAsync；可以接受上次的结果,但是没有返回值
* applyToEitherAsync；可感知结果，且有返回值
*/
// future01.runAfterEitherAsync(future02,()->{
// System.out.println("任务三开始");
// },executor);
//可以接受上次的结果,但是没有返回值
// future01.acceptEitherAsync(future02,(res)->{
// System.out.println("任务三开始...之前的结果是" + res);
// },executor);
//可感知结果，且有返回值
// CompletableFuture<String> future = future01.applyToEitherAsync(future02, res -> {
// return res.toString() + "->哈哈";
// }, executor);
// System.out.println(future.get());
/**
* 多任务组合
*/
CompletableFuture<String> futureImg = CompletableFuture.supplyAsync(()->{
System.out.println("查询商品的图片信息");
return "hello.jpg";
},executor);
CompletableFuture<String> futureAttr = CompletableFuture.supplyAsync(()->{
System.out.println("查询商品的属性");
return "黑色+256G";
},executor);
CompletableFuture<String> futureDesc = CompletableFuture.supplyAsync(()->{
System.out.println("查询商品的介绍");
try {
Thread.sleep(3000);
} catch (InterruptedException e) {
e.printStackTrace();
}
return "华为";
},executor);
// futureImg.get();futureAttr.get();futureDesc.get();//阻塞式等待，太麻烦，代码冗余
// CompletableFuture<Void> allOf = CompletableFuture.allOf(futureImg, futureAttr, futureDesc);
// allOf.get();//等待所有结果完成
// System.out.println("main...end..."+futureImg.get() + futureAttr.get() + futureDesc.get());
CompletableFuture<Object> anyOf = CompletableFuture.anyOf(futureImg, futureAttr, futureDesc);
anyOf.get();//任意一个返回即可
System.out.println("main...end..."+anyOf.get());
/**
* 线程串行化
* 1、thenRunL：不能获取上一步的执行结果
* 2、thenAcceptAsync：能接受上一步结果，但是无返回值
* 3、thenApplyAsync：能接受上一步结果，有返回值
*
*/
CompletableFuture<String> future = CompletableFuture.supplyAsync(() -> {
System.out.println("当前线程：" + Thread.currentThread().getId());
int i = 10 / 2;
System.out.println("运行结果：" + i);
return i;
}, executor).thenApplyAsync(res -> {
System.out.println("任务2启动了..." + res);
return "Hello" + res;
}, executor);
System.out.println("main......end....." + future.get());
}
private static void threadPool() {
ExecutorService threadPool = new ThreadPoolExecutor(
200,
10,
10L,
TimeUnit.SECONDS,
new LinkedBlockingDeque<Runnable>(10000),
Executors.defaultThreadFactory(),
new ThreadPoolExecutor.AbortPolicy()
);
//定时任务的线程池
ExecutorService service = Executors.newScheduledThreadPool(2);
}
public static class Thread01 extends Thread {
@Override
public void run() {
System.out.println("当前线程：" + Thread.currentThread().getId());
int i = 10 / 2;
System.out.println("运行结果：" + i);
}
}
public static class Runable01 implements Runnable {
@Override
public void run() {
System.out.println("当前线程：" + Thread.currentThread().getId());
int i = 10 / 2;
System.out.println("运行结果：" + i);
}
}
public static class Callable01 implements Callable<Integer> {
@Override
public Integer call() throws Exception {
System.out.println("当前线程：" + Thread.currentThread().getId());
int i = 10 / 2;
System.out.println("运行结果：" + i);
return i;
}
}
}
