摘要：耗時(shí)毫秒耗時(shí)毫秒耗時(shí)毫秒添加異步任務(wù)控制器測(cè)試異步任務(wù)控制器。

-

1、有時(shí)候我們?cè)谔幚硪恍┤蝿?wù)的時(shí)候，需要開啟線程去異步去處理，原有邏輯繼續(xù)往下執(zhí)行；
2、當(dāng)遇到這種場(chǎng)景的時(shí)候，線程是可以將我們完成，然后在SpringCloud中也有這樣的注解來支撐異步任務(wù)處理；

    4.0.0

    springms-async
    1.0-SNAPSHOT
    jar
    
    
        com.springms.cloud
        springms-spring-cloud
        1.0-SNAPSHOT
    
    
    
        
        
            org.springframework.boot
            spring-boot-starter-web
        
    

server:
  port: 8345
spring:
  application:
    name: springms-async  #全部小寫

package com.springms.cloud.task;

import org.slf4j.LoggerFactory;
import org.springframework.scheduling.annotation.Async;
import org.springframework.scheduling.annotation.AsyncResult;
import org.springframework.stereotype.Component;

import java.text.SimpleDateFormat;
import java.util.Random;
import java.util.concurrent.Future;

/**
 * Async實(shí)現(xiàn)異步調(diào)用。
 *
 * @author hmilyylimh
 *
 * @version 0.0.1
 *
 * @date 2017/10/19
 *
 */
@Component
public class AsyncTasks {

    public static Random random = new Random();

    @Async
    public Future doTaskOne() throws Exception {
        System.out.println("Async, taskOne, Start...");
        long start = System.currentTimeMillis();
        Thread.sleep(random.nextInt(10000));
        long end = System.currentTimeMillis();
        System.out.println("Async, taskOne, End, 耗時(shí): " + (end - start) + "毫秒");
        return new AsyncResult<>("AsyncTaskOne Finished");
    }

    @Async
    public Future doTaskTwo() throws Exception {
        System.out.println("Async, taskTwo, Start");
        long start = System.currentTimeMillis();
        Thread.sleep(random.nextInt(10000));
        long end = System.currentTimeMillis();
        System.out.println("Async, taskTwo, End, 耗時(shí): " + (end - start) + "毫秒");
        return new AsyncResult<>("AsyncTaskTwo Finished");
    }

    @Async
    public Future doTaskThree() throws Exception {
        System.out.println("Async, taskThree, Start");
        long start = System.currentTimeMillis();
        Thread.sleep(random.nextInt(5000));
        long end = System.currentTimeMillis();
        System.out.println("Async, taskThree, End, 耗時(shí): " + (end - start) + "毫秒");
        return new AsyncResult<>("AsyncTaskThree Finished");
    }
}

package com.springms.cloud.controller;

import com.springms.cloud.task.AsyncTasks;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.concurrent.Future;

/**
 * 測(cè)試異步任務(wù)Web控制器。
 *
 * @author hmilyylimh
 *
 * @version 0.0.1
 *
 * @date 2017/10/19
 *
 */
@RestController
public class AsyncTaskController {

    @Autowired
    AsyncTasks asyncTasks;

    /**
     * 測(cè)試異步任務(wù)。
     *
     * @return
     * @throws Exception
     */
    @GetMapping("/task")
    public String task() throws Exception {
        long start = System.currentTimeMillis();

        Future task1 = asyncTasks.doTaskOne();
        Future task2 = asyncTasks.doTaskTwo();
        Future task3 = asyncTasks.doTaskThree();

        while(true) {
            if(task1.isDone() && task2.isDone() && task3.isDone()) {
                // 三個(gè)任務(wù)都調(diào)用完成，退出循環(huán)等待
                break;
            }
            Thread.sleep(1000);
        }

        long end = System.currentTimeMillis();

        String result = "任務(wù)全部完成，總耗時(shí)：" + (end - start) + "毫秒";
        return result;
    }
}

package com.springms.cloud;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.scheduling.annotation.EnableAsync;

/**
 * 注解式Async配置異步任務(wù)；
 *
 * @author hmilyylimh
 *
 * @version 0.0.1
 *
 * @date 2017/10/19
 *
 */
@SpringBootApplication
@EnableAsync
public class MsAsyncApplication {

    public static void main(String[] args) {
        SpringApplication.run(MsAsyncApplication.class, args);
        System.out.println("【【【【【【 Async異步任務(wù)微服務(wù) 】】】】】】已啟動(dòng).");
    }
}

/****************************************************************************************
 一、簡(jiǎn)單用戶鏈接Mysql數(shù)據(jù)庫(kù)微服務(wù)（Async實(shí)現(xiàn)異步調(diào)用）：

 1、添加注解 EnableAsync、Async 以及任務(wù)類上注解 Component ；
 2、啟動(dòng) springms-async 模塊服務(wù)，啟動(dòng)1個(gè)端口；
 3、然后在瀏覽器輸入地址 http://localhost:8345/task 然后等待大約10多秒后，成功打印所有信息，一切正常；

 總結(jié)：說明 Async 異步任務(wù)配置生效了；
 ****************************************************************************************/

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