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這篇文章主要為大家展示了“spring boot如何使用自定義配置的線程池執行Async異步任務”,內容簡而易懂,條理清晰,希望能夠幫助大家解決疑惑,下面讓小編帶領大家一起研究并學習一下“spring boot如何使用自定義配置的線程池執行Async異步任務”這篇文章吧。
package com.chhliu.springboot.async.configuration; import org.springframework.boot.context.properties.ConfigurationProperties; @ConfigurationProperties(prefix = "spring.task.pool") // 該注解的locations已經被啟用,現在只要是在環境中,都會優先加載 public class TaskThreadPoolConfig { private int corePoolSize; private int maxPoolSize; private int keepAliveSeconds; private int queueCapacity; …………省略getter,setter方法………… }
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:當pool已經達到max size的時候,如何處理新任務 // CALLER_RUNS:不在新線程中執行任務,而是由調用者所在的線程來執行 executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy()); executor.initialize(); return executor; } }
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} ) // 開啟配置屬性支持 public class SpringbootAsyncApplication { public static void main(String[] args) { SpringApplication.run(SpringbootAsyncApplication.class, args); } }
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即配置線程池的方法名,此處如果不寫自定義線程池的方法名,會使用默認的線程池 public void doTask1(int i) throws InterruptedException{ logger.info("Task"+i+" started."); } }
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."); } }
測試結果如下:
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.
測試結果ok!
如果我們想使用默認的線程池,但是只是想修改默認線程池的配置,那怎么做了,此時我們需要實現AsyncConfigurer類,示例代碼如下:
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:該線程池被所有的異步任務共享,而不屬于某一個異步任務 * 描述:配置異步任務的線程池 * @author chhliu * 創建時間: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; // 配置屬性類,見上面的代碼 @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:當pool已經達到max size的時候,如何處理新任務 // CALLER_RUNS:不在新線程中執行任務,而是由調用者所在的線程來執行 executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy()); executor.initialize(); return executor; } @Override public AsyncUncaughtExceptionHandler getAsyncUncaughtExceptionHandler() {// 異步任務中異常處理 return new AsyncUncaughtExceptionHandler() { @Override public void handleUncaughtException(Throwable arg0, Method arg1, Object... arg2) { log.error("=========================="+arg0.getMessage()+"=======================", arg0); log.error("exception method:"+arg1.getName()); } }; } }
使用的時候,只需在方法上加上@Async即可。
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