Spring 非同步執行緒池、排程任務執行緒池配置

junbaor發表於2017-12-20
Spring非同步執行緒

一個專案中既需要非同步任務, 也需要排程任務, 想把這兩個非同步執行緒池分來就需要配置兩個執行緒池。
排程任務新增 @Scheduled 註解, 需要非同步執行的方法新增 @Async 註解

中間遇到點小問題, 非同步任務執行緒池總是不生效, 而是使用的排程任務執行緒池, 經過查文件不斷嘗試解決了.
公司利用 slf4j 的 MDC 做鏈路跟蹤, 所以還需要新增前置操作, 使用 TaskDecorator 實現。

再次分享給大家以作備忘.

程式碼如下：

AsyncConfig.java

package com.ecej.esmart.autodispatch.config;


import com.alibaba.fastjson.JSON;
import lombok.extern.slf4j.Slf4j;
import org.slf4j.MDC;
import org.springframework.aop.interceptor.AsyncUncaughtExceptionHandler;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.task.TaskDecorator;
import org.springframework.scheduling.annotation.AsyncConfigurer;
import org.springframework.scheduling.annotation.EnableAsync;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;

import java.util.Map;
import java.util.concurrent.Executor;

@Slf4j
@EnableAsync
@Configuration
public class AsyncConfig implements AsyncConfigurer {

    @Bean
    @Override
    public Executor getAsyncExecutor() {
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
        executor.setCorePoolSize(10);
        executor.setMaxPoolSize(10);
        executor.setQueueCapacity(100);
        executor.setThreadNamePrefix("async-pool-");
        executor.setTaskDecorator(new MdcTaskDecorator());
        executor.setWaitForTasksToCompleteOnShutdown(true);
        executor.initialize();
        return executor;
    }

    class MdcTaskDecorator implements TaskDecorator {
        @Override
        public Runnable decorate(Runnable runnable) {
            Map<String, String> contextMap = MDC.getCopyOfContextMap();
            try {
                if (contextMap != null) {
                    MDC.setContextMap(contextMap);
                }
                runnable.run();
            } finally {
                /** 清理後會導致父執行緒的上下文清空,進入時會複製父執行緒的內容進行覆蓋,可不清理 */
                //MDC.clear();
            }
            return runnable;
        }
    }

    @Override
    public AsyncUncaughtExceptionHandler getAsyncUncaughtExceptionHandler() {
        return (throwable, method, params) -> {
            log.error("非同步任務異常：方法：{} 引數：{}", method.getName(), JSON.toJSONString(params));
            log.error(throwable.getMessage(), throwable);
        };
    }
}

SchedulingConfig.java

package com.ecej.esmart.autodispatch.config;


import lombok.extern.slf4j.Slf4j;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.annotation.EnableScheduling;
import org.springframework.scheduling.annotation.SchedulingConfigurer;
import org.springframework.scheduling.concurrent.ThreadPoolTaskScheduler;
import org.springframework.scheduling.config.ScheduledTaskRegistrar;

@Slf4j
@Configuration
@EnableScheduling
public class SchedulingConfig implements SchedulingConfigurer {

    @Override
    public void configureTasks(ScheduledTaskRegistrar scheduledTaskRegistrar) {
        scheduledTaskRegistrar.setTaskScheduler(taskScheduler());
    }

    @Bean(destroyMethod = "shutdown")
    public ThreadPoolTaskScheduler taskScheduler() {
        ThreadPoolTaskScheduler scheduler = new ThreadPoolTaskScheduler();
        scheduler.setPoolSize(5);
        scheduler.setThreadNamePrefix("dispatch-");
        scheduler.setAwaitTerminationSeconds(600);
        scheduler.setErrorHandler(throwable -> log.error("排程任務發生異常", throwable));
        scheduler.setWaitForTasksToCompleteOnShutdown(true);
        return scheduler;
    }

}

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