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如何隔离@async异步任务的线程池
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‎2.x/README.md

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- [Spring Boot 2.x基础教程：使用@Async实现异步任务](https://blog.didispace.com/spring-boot-learning-2-7-5)
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- [Spring Boot 2.x基础教程：配置@Async异步任务的线程池](https://blog.didispace.com/spring-boot-learning-2-7-6)
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- [Spring Boot 2.x基础教程：@Async异步任务的线程池隔离](https://blog.didispace.com/spring-boot-learning-2-7-7)
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- [Spring Boot 2.x基础教程：如何隔离@Async异步任务的线程池](https://blog.didispace.com/spring-boot-learning-2-7-7)
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### 常见问题
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‎2.x/README_zh.md

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- [Spring Boot 2.x基础教程：使用@Async实现异步任务](https://blog.didispace.com/spring-boot-learning-2-7-5)
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- [Spring Boot 2.x基础教程：配置@Async异步任务的线程池](https://blog.didispace.com/spring-boot-learning-2-7-6)
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- [Spring Boot 2.x基础教程：@Async异步任务的线程池隔离](https://blog.didispace.com/spring-boot-learning-2-7-7)
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- [Spring Boot 2.x基础教程：如何隔离@Async异步任务的线程池](https://blog.didispace.com/spring-boot-learning-2-7-7)
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### 常见问题
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‎2.x/chapter7-7/pom.xml

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</parent>
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<groupId>com.didispace</groupId>
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<artifactId>chapter7-6</artifactId>
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<artifactId>chapter7-7</artifactId>
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<version>0.0.1-SNAPSHOT</version>
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<description>@Async异步任务的线程池隔离</description>
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<description>如何隔离@Async异步任务的线程池</description>
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<properties>
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<java.version>1.8</java.version>

‎2.x/chapter7-7/src/main/java/com/didispace/chapter77/AsyncTasks.java

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import java.util.Random;
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import java.util.concurrent.CompletableFuture;
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import java.util.concurrent.Future;
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@Slf4j
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@Component
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public class AsyncTasks {
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public static Random random = new Random();
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@Async
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public CompletableFuture<String> doTaskOne() throws Exception {
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log.info("开始做任务一");
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@Async("taskExecutor1")
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public CompletableFuture<String> doTaskOne(String taskNo) throws Exception {
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log.info("开始任务：{}", taskNo);
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long start = System.currentTimeMillis();
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Thread.sleep(random.nextInt(10000));
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long end = System.currentTimeMillis();
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log.info("完成任务一，耗时：" + (end - start) + "毫秒");
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return CompletableFuture.completedFuture("任务一完成");
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}
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@Async
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public CompletableFuture<String> doTaskTwo() throws Exception {
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log.info("开始做任务二");
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long start = System.currentTimeMillis();
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Thread.sleep(random.nextInt(10000));
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long end = System.currentTimeMillis();
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log.info("完成任务二，耗时：" + (end - start) + "毫秒");
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return CompletableFuture.completedFuture("任务二完成");
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}
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@Async
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public CompletableFuture<String> doTaskThree() throws Exception {
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log.info("开始做任务三");
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long start = System.currentTimeMillis();
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Thread.sleep(random.nextInt(10000));
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long end = System.currentTimeMillis();
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log.info("完成任务三，耗时：" + (end - start) + "毫秒");
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return CompletableFuture.completedFuture("任务三完成");
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log.info("完成任务：{}，耗时：{} 毫秒", taskNo, end - start);
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return CompletableFuture.completedFuture("任务完成");
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}
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@Async("taskExecutor2")
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public CompletableFuture<String> doTaskFour() throws Exception {
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log.info("开始做任务四");
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public CompletableFuture<String> doTaskTwo(String taskNo) throws Exception {
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log.info("开始任务：{}", taskNo);
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long start = System.currentTimeMillis();
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Thread.sleep(random.nextInt(10000));
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long end = System.currentTimeMillis();
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log.info("完成任务四，耗时：" + (end - start) + "毫秒");
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return CompletableFuture.completedFuture("任务四完成");
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log.info("完成任务：{}，耗时：{} 毫秒", taskNo, end - start);
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return CompletableFuture.completedFuture("任务完成");
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}
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}

‎2.x/chapter7-7/src/main/java/com/didispace/chapter77/Chapter77Application.java

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@EnableAsync
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@SpringBootApplication
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public class Chapter76Application {
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public class Chapter77Application {
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public static void main(String[] args) {
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SpringApplication.run(Chapter76Application.class, args);
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SpringApplication.run(Chapter77Application.class, args);
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}
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@EnableAsync
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@Configuration
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class TaskPoolConfig {
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// @Bean
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// public Executor taskExecutor2() {
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// ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
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// executor.setCorePoolSize(1);
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// executor.setMaxPoolSize(2);
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// executor.setQueueCapacity(50);
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// executor.setKeepAliveSeconds(60);
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// executor.setThreadNamePrefix("taskExecutor2-");
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// executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
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// return executor;
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// }
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@Bean
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public Executor taskExecutor1() {
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ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
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executor.setCorePoolSize(2);
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executor.setMaxPoolSize(2);
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executor.setQueueCapacity(10);
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executor.setKeepAliveSeconds(60);
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executor.setThreadNamePrefix("executor-1-");
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executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
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return executor;
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}
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@Bean
42+
public Executor taskExecutor2() {
43+
ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
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executor.setCorePoolSize(2);
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executor.setMaxPoolSize(2);
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executor.setQueueCapacity(10);
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executor.setKeepAliveSeconds(60);
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executor.setThreadNamePrefix("executor-2-");
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executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
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return executor;
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}
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}
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‎2.x/chapter7-7/src/main/resources/application.properties

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spring.task.execution.pool.core-size=2
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spring.task.execution.pool.max-size=5
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spring.task.execution.pool.queue-capacity=10
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spring.task.execution.pool.keep-alive=60s
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spring.task.execution.pool.allow-core-thread-timeout=true
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spring.task.execution.thread-name-prefix=task-
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spring.task.execution.shutdown.await-termination=false
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spring.task.execution.shutdown.await-termination-period=30s

‎2.x/chapter7-7/src/test/java/com/didispace/chapter77/Chapter77ApplicationTests.java

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package com.didispace.chapter76;
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package com.didispace.chapter77;
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import lombok.extern.slf4j.Slf4j;
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import org.junit.jupiter.api.Test;
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@Slf4j
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@SpringBootTest
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public class Chapter76ApplicationTests {
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public class Chapter77ApplicationTests {
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@Autowired
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private AsyncTasks asyncTasks;
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@Test
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public void test1() throws Exception {
19+
public void test() throws Exception {
2020
long start = System.currentTimeMillis();
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CompletableFuture<String> task1 = asyncTasks.doTaskOne();
23-
CompletableFuture<String> task2 = asyncTasks.doTaskTwo();
24-
CompletableFuture<String> task3 = asyncTasks.doTaskThree();
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// 线程池1
23+
CompletableFuture<String> task1 = asyncTasks.doTaskOne("1");
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CompletableFuture<String> task2 = asyncTasks.doTaskOne("2");
25+
CompletableFuture<String> task3 = asyncTasks.doTaskOne("3");
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CompletableFuture.allOf(task1, task2, task3).join();
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// 线程池2
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CompletableFuture<String> task4 = asyncTasks.doTaskTwo("4");
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CompletableFuture<String> task5 = asyncTasks.doTaskTwo("5");
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CompletableFuture<String> task6 = asyncTasks.doTaskTwo("6");
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long end = System.currentTimeMillis();
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30-
log.info("任务全部完成，总耗时：" + (end - start) + "毫秒");
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}
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33-
@Test
34-
public void test2() throws Exception {
35-
long start = System.currentTimeMillis();
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37-
CompletableFuture<String> task1 = asyncTasks.doTaskFour();
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CompletableFuture<String> task2 = asyncTasks.doTaskFour();
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CompletableFuture<String> task3 = asyncTasks.doTaskFour();
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CompletableFuture.allOf(task1, task2, task3).join();
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// 一起执行
33+
CompletableFuture.allOf(task1, task2, task3, task4, task5, task6).join();
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long end = System.currentTimeMillis();
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‎2.x/pom.xml

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<module>chapter7-4</module> <!-- 7-4 使用Elastic Job的namespace防止任务名冲突 -->
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<module>chapter7-5</module> <!-- 7-5 使用@Async实现异步任务 -->
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<module>chapter7-6</module> <!-- 7-6 配置@Async异步任务的线程池 -->
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<!--7-7 @Async异步任务的线程池隔离-->
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<module>chapter7-7</module> <!-- 7-7 如何隔离@Async异步任务的线程池-->
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<!-- 安全控制 -->
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<module>chapter8-1</module> <!-- Spring Security快速入门 -->

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