@async异步任务的线程池配置

2.x/chapter7-6/pom.xml

@@ -0,0 +1,50 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>2.5.1</version>
+        <relativePath/> <!-- lookup parent from repository -->
+    </parent>
+
+    <groupId>com.didispace</groupId>
+    <artifactId>chapter7-6</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <description>@Async异步任务的线程池配置</description>
+
+    <properties>
+        <java.version>1.8</java.version>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+            <scope>provided</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>

2.x/chapter7-6/src/main/java/com/didispace/chapter76/AsyncTasks.java

@@ -0,0 +1,46 @@
+package com.didispace.chapter76;
+
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.scheduling.annotation.Async;
+import org.springframework.stereotype.Component;
+
+import java.util.Random;
+import java.util.concurrent.CompletableFuture;
+
+@Slf4j
+@Component
+public class AsyncTasks {
+
+    public static Random random = new Random();
+
+    @Async
+    public CompletableFuture<String> doTaskOne() throws Exception {
+        log.info("开始做任务一");
+        long start = System.currentTimeMillis();
+        Thread.sleep(random.nextInt(10000));
+        long end = System.currentTimeMillis();
+        log.info("完成任务一，耗时：" + (end - start) + "毫秒");
+        return CompletableFuture.completedFuture("任务一完成");
+    }
+
+    @Async
+    public CompletableFuture<String> doTaskTwo() throws Exception {
+        log.info("开始做任务二");
+        long start = System.currentTimeMillis();
+        Thread.sleep(random.nextInt(10000));
+        long end = System.currentTimeMillis();
+        log.info("完成任务二，耗时：" + (end - start) + "毫秒");
+        return CompletableFuture.completedFuture("任务二完成");
+    }
+
+    @Async
+    public CompletableFuture<String>  doTaskThree() throws Exception {
+        log.info("开始做任务三");
+        long start = System.currentTimeMillis();
+        Thread.sleep(random.nextInt(10000));
+        long end = System.currentTimeMillis();
+        log.info("完成任务三，耗时：" + (end - start) + "毫秒");
+        return CompletableFuture.completedFuture("任务三完成");
+    }
+
+}

2.x/chapter7-6/src/main/java/com/didispace/chapter76/Chapter76Application.java

@@ -0,0 +1,15 @@
+package com.didispace.chapter76;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.scheduling.annotation.EnableAsync;
+
+@EnableAsync
+@SpringBootApplication
+public class Chapter76Application {
+
+    public static void main(String[] args) {
+        SpringApplication.run(Chapter76Application.class, args);
+    }
+
+}

2.x/chapter7-6/src/test/java/com/didispace/chapter76/Chapter76ApplicationTests.java

@@ -0,0 +1,33 @@
+package com.didispace.chapter76;
+
+import lombok.extern.slf4j.Slf4j;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.Future;
+
+@Slf4j
+@SpringBootTest
+public class Chapter76ApplicationTests {
+
+    @Autowired
+    private AsyncTasks asyncTasks;
+
+    @Test
+    public void test() throws Exception {
+        long start = System.currentTimeMillis();
+
+        CompletableFuture<String> task1 = asyncTasks.doTaskOne();
+        CompletableFuture<String> task2 = asyncTasks.doTaskTwo();
+        CompletableFuture<String> task3 = asyncTasks.doTaskThree();
+
+        CompletableFuture.allOf(task1, task2, task3).join();
+
+        long end = System.currentTimeMillis();
+
+        log.info("任务全部完成，总耗时：" + (end - start) + "毫秒");
+    }
+
+}

2.x/pom.xml

@@ -76,7 +76,7 @@
         <module>chapter7-3</module>  <!-- 7-3 使用Elastic Job的分片配置 -->
         <module>chapter7-4</module>  <!-- 7-4 使用Elastic Job的namespace防止任务名冲突 -->
         <module>chapter7-5</module>  <!-- 7-5 使用@Async实现异步任务 -->
-
+        <module>chapter7-6</module>  <!-- 7-6 @Async异步任务的线程池配置 -->
 
     </modules>
 </project>