时间:2021-05-19
在前面的博客中, 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网站的支持!
声明:本页内容来源网络,仅供用户参考;我单位不保证亦不表示资料全面及准确无误,也不保证亦不表示这些资料为最新信息,如因任何原因,本网内容或者用户因倚赖本网内容造成任何损失或损害,我单位将不会负任何法律责任。如涉及版权问题,请提交至online#300.cn邮箱联系删除。
Spring通过任务执行器(TaskExecutor)来实现多线程和并发编程。使用ThreadPoolTaskExecutor可实现一个基于线程池的Task
了解过spring-Boot这个技术的,应该知道Spring-Boot的核心配置文件application.properties,当然也可以通过注解自定义配置文
本文实例讲述了Android编程自定义线程池与用法。分享给大家供大家参考,具体如下:一、概述:1、因为线程池是固定不变的,所以使用了单例模式2、定义了两个线程池
自定义Starter命名规则注意artifactId的命名规则,Spring官方Starter通常命名为spring-boot-starter-{name}如s
1.自定义线程池importthreadingimportQueueimporttimequeue=Queue.Queue()defput_data_in_qu