spring boot使用自定义的线程池执行Async任务

在前面的博客中，http://www.zzvips.com/article/153013.html 我们使用了spring boot的异步操作，当时，我们使用的是默认的线程池，但是，如果我们想根据项目来定制自己的线程池了，下面就来说说，如何定制线程池！

一、增加配置属性类

package com.chhliu.springboot.async.configuration;
import org.springframework.boot.context.properties.ConfigurationProperties;
@ConfigurationProperties(prefix = "spring.task.pool") // 该注解的locations已经被启用，现在只要是在环境中，都会优先加载
public class TaskThreadPoolConfig {
 private int corePoolSize;
 private int maxPoolSize;
 private int keepAliveSeconds;
 private int queueCapacity;
 …………省略getter,setter方法…………
}

二、创建线程池

package com.chhliu.springboot.async.pool;
import java.util.concurrent.Executor;
import java.util.concurrent.ThreadPoolExecutor;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.annotation.EnableAsync;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
import com.chhliu.springboot.async.configuration.TaskThreadPoolConfig;
@Configuration
@EnableAsync
public class TaskExecutePool {
 @Autowired
 private TaskThreadPoolConfig config;
 @Bean
 public Executor myTaskAsyncPool() {
 ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
 executor.setCorePoolSize(config.getCorePoolSize());
 executor.setMaxPoolSize(config.getMaxPoolSize());
 executor.setQueueCapacity(config.getQueueCapacity());
 executor.setKeepAliveSeconds(config.getKeepAliveSeconds());
 executor.setThreadNamePrefix("MyExecutor-");
 // rejection-policy：当pool已经达到max size的时候，如何处理新任务
 // CALLER_RUNS：不在新线程中执行任务，而是由调用者所在的线程来执行
 executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
 executor.initialize();
 return executor;
 }
}

三、在主类中开启配置支持

package com.chhliu.springboot.async;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.scheduling.annotation.EnableAsync;
import com.chhliu.springboot.async.configuration.TaskThreadPoolConfig;
@SpringBootApplication
@EnableAsync
@EnableConfigurationProperties({TaskThreadPoolConfig.class} ) // 开启配置属性支持
public class SpringbootAsyncApplication {
 public static void main(String[] args) {
 SpringApplication.run(SpringbootAsyncApplication.class, args);
 }
}

四、测试类

package com.chhliu.springboot.async.pool;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.scheduling.annotation.Async;
import org.springframework.stereotype.Component;
@Component
public class AsyncTask {
 protected final Logger logger = LoggerFactory.getLogger(this.getClass());
 @Async("myTaskAsyncPool") //myTaskAsynPool即配置线程池的方法名，此处如果不写自定义线程池的方法名，会使用默认的线程池
 public void doTask1(int i) throws InterruptedException{
 logger.info("Task"+i+" started.");
 }
}

五、测试

package com.chhliu.springboot.async;
import java.util.concurrent.ExecutionException;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;
import com.chhliu.springboot.async.pool.AsyncTask;
@RunWith(SpringRunner.class)
@SpringBootTest
public class SpringbootAsyncApplicationTests {
 protected final Logger logger = LoggerFactory.getLogger(this.getClass());
 @Autowired
 private AsyncTask asyncTask;
 @Test
 public void AsyncTaskTest() throws InterruptedException, ExecutionException {
 for (int i = 0; i < 100; i++) {
  asyncTask.doTask1(i);
 }
 logger.info("All tasks finished.");
 }
}

测试结果如下：

2017-03-20 20:15:15.208  INFO 4068 --- [  MyExecutor-10] c.c.springboot.async.pool.AsyncTask      : Task60 started. 
2017-03-20 20:15:15.208  INFO 4068 --- [  MyExecutor-25] c.c.springboot.async.pool.AsyncTask      : Task61 started. 
2017-03-20 20:15:15.208  INFO 4068 --- [   MyExecutor-6] c.c.springboot.async.pool.AsyncTask      : Task62 started. 
2017-03-20 20:15:15.208  INFO 4068 --- [  MyExecutor-23] c.c.springboot.async.pool.AsyncTask      : Task63 started. 
2017-03-20 20:15:15.208  INFO 4068 --- [  MyExecutor-20] c.c.springboot.async.pool.AsyncTask      : Task64 started. 
2017-03-20 20:15:15.208  INFO 4068 --- [  MyExecutor-19] c.c.springboot.async.pool.AsyncTask      : Task65 started. 
2017-03-20 20:15:15.208  INFO 4068 --- [  MyExecutor-16] c.c.springboot.async.pool.AsyncTask      : Task66 started. 
2017-03-20 20:15:15.208  INFO 4068 --- [  MyExecutor-15] c.c.springboot.async.pool.AsyncTask      : Task67 started. 
2017-03-20 20:15:15.208  INFO 4068 --- [  MyExecutor-12] c.c.springboot.async.pool.AsyncTask      : Task68 started. 
2017-03-20 20:15:15.209  INFO 4068 --- [   MyExecutor-1] c.c.springboot.async.pool.AsyncTask      : Task69 started. 
2017-03-20 20:15:15.209  INFO 4068 --- [  MyExecutor-11] c.c.springboot.async.pool.AsyncTask      : Task81 started. 
2017-03-20 20:15:15.209  INFO 4068 --- [   MyExecutor-8] c.c.springboot.async.pool.AsyncTask      : Task82 started. 
2017-03-20 20:15:15.209  INFO 4068 --- [   MyExecutor-7] c.c.springboot.async.pool.AsyncTask      : Task83 started. 
2017-03-20 20:15:15.209  INFO 4068 --- [   MyExecutor-4] c.c.springboot.async.pool.AsyncTask      : Task84 started. 
2017-03-20 20:15:15.209  INFO 4068 --- [  MyExecutor-29] c.c.springboot.async.pool.AsyncTask      : Task85 started. 
2017-03-20 20:15:15.209  INFO 4068 --- [  MyExecutor-21] c.c.springboot.async.pool.AsyncTask      : Task86 started. 
2017-03-20 20:15:15.209  INFO 4068 --- [  MyExecutor-17] c.c.springboot.async.pool.AsyncTask      : Task88 started. 

测试结果ok！

六、配置默认的线程池

如果我们想使用默认的线程池，但是只是想修改默认线程池的配置，那怎么做了，此时我们需要实现AsyncConfigurer类，示例代码如下：

import java.lang.reflect.Method;
import java.util.concurrent.Executor;
import java.util.concurrent.ThreadPoolExecutor;
import org.springframework.aop.interceptor.AsyncUncaughtExceptionHandler;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.annotation.AsyncConfigurer;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
import com.chhliu.cq.emailservice.threadconfiguration.TaskThreadPoolConfig;
import lombok.extern.slf4j.Slf4j;
/**
 * 注意：该线程池被所有的异步任务共享，而不属于某一个异步任务
 * 描述：配置异步任务的线程池
 * @author chhliu
 * 创建时间：2017年5月22日 上午10:20:56
 * @version 1.2.0
 */
@Slf4j
@Configuration
public class AsyncTaskExecutePool implements AsyncConfigurer{
 @Autowired
 private TaskThreadPoolConfig config; // 配置属性类，见上面的代码
 @Override
 public Executor getAsyncExecutor() {
 ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
 executor.setCorePoolSize(config.getCorePoolSize());
 executor.setMaxPoolSize(config.getMaxPoolSize());
 executor.setQueueCapacity(config.getQueueCapacity());
 executor.setKeepAliveSeconds(config.getKeepAliveSeconds());
 executor.setThreadNamePrefix("taskExecutor-");
 // rejection-policy：当pool已经达到max size的时候，如何处理新任务
 // CALLER_RUNS：不在新线程中执行任务，而是由调用者所在的线程来执行
 executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
 executor.initialize();
 return executor;
 }
 @Override
 public AsyncUncaughtExceptionHandler getAsyncUncaughtExceptionHandler() {// 异步任务中异常处理
 return new AsyncUncaughtExceptionHandler() {
  @Override
  public void handleUncaughtException(Throwable arg0, Method arg1, Object... arg2) {
  log.error("=========================="+arg0.getMessage()+"=======================", arg0);
  log.error("exception method:"+arg1.getName());
  }
 };
 }
}

使用的时候，只需在方法上加上@Async即可。

总结

以上所述是小编给大家介绍的spring boot使用自定义的线程池执行Async任务，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对服务器之家网站的支持！

原文链接：http://blog.csdn.net/liuchuanhong1/article/details/64132520