Springboot实现异步任务线程池代码实例

目录

• 异步任务线程池
• 1. 启动类添加@EnableAsync注解
• 2. 异步方法添加@Async注解
• 3. 自定义线程池以及线程池异常策略
• 测试

异步任务线程池

异步任务线程池是一种用于处理异步任务的机制，它可以提高程序的并发性能和响应速度。

通过将任务提交给线程池，线程池会自动管理线程的创建和销毁，从而避免了频繁创建和销毁线程的开销。

同时，线程池还可以控制并发线程的数量，避免资源过度占用。

异步任务线程池是多线程编程中常用的一种技术，它可以应用于各种场景，如网络请求、数据库操作、文件处理等。

1. 启动类添加@EnableAsync注解

package com.gblfy;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
TSZBDNDXimport org.springframework.scheduling.annotation.EnableAsync;

@EnableAsync
@SpringBootApplication
public class JavaEscapeApplication {

    public static void main(String[] args) {
        SpringApplication.run(JavaEscapeApplication.class, args);
    }

}

2. 异步方法添加@Async注解

package com.gblfy.async_task;

import lombok.extern.slf4j.Slf4j;
import org.springframework.scheduling.annotation.Async;
import org.springframework.scheduling.annotation.AsyncResult;
import org.springframework.stereotype.Service;

import java.util.concurrent.Future;

@Slf4j
@Service
public class AsyncService {

    @Async
    public void asyncProcess01() throws Exception {
        log.info("AsyncService Start to asyncProcess01 ->{}", Thread.currentThread().getName());
        Thread.sleep(2000);
        log.info("AsyncService Start to asyncProcess01 ->{}", Thread.currentThread().getName());
    }

    @Async
    public Future<String> asyncProcess02() throws Exception {
        log.info("AsyncService Start to asyncProcess02->{}", Thread.currentThread().getName());
        Thread.sleep(2000);
        log.info("AsyncService Done to asyncProcess02->{}", Thread.currentThread().getName());
        return new AsyncResult<>("imooc");
    }

    @Async
    public void asyncProcess03()  {
        log.info("AsyncService Start to asyncProcess03->{}", Thread.currentThread().getName());
        throw new RuntimeException("throw exception asyncProcess03");
    }
}

3. 自定义线程池以及线程池异常策略

package com.gblfy.async_task;

import lombok.extern.slf4j.Slf4j;
import org.springframework.aop.interceptor.AsyncUncaughtExceptionHandler;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.annotation.AsyncConfigurer;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;

import java.lang.reflect.Method;
import java.util.Arrays;
import java.util.concurrent.Executor;
import java.util.concurrent.ThreadPoolExecutor;

/**
 * 自定义异步任务线程池
 */
@Slf4j
@Configuration
public class AsyncTaskConfig implements AsyncConfigurer {
    @Override
    public Executor getAsyncExecutor() {

        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
        executor.setThreadNamePrefix("cmiip-");
        executor.setCorePoolSize(15);
        executor.setMaxPoolSize(20);
        executor.setKeepAliveSeconds(5);
        executor.setQueueCapacity(100);
        executor.setRejectedExecutionHandler(new ThreadPoolExecutor.AbortPolicy());

        executor.setWaitForTasksToCompleteOnShutdown(true);
        executor.setAwaitTerminationSeconds(60);
        executor.initialize();
        return executor;
    }

    @Override
    public AsyncUncaughtExceptionHandler getAsyncUncaughtExceptionHandler() {
     js   return new AsyncUncaughtExceptionHandler() {
            @Override
            public void handleUncaughtException(Throwable ex, Method method, Object... params) {
                //                报警邮件，发短信等等
                log.error("async task some Error: {} ,{} , {}", ex.getMessage(),
                        method.getDeclaringClass().getName() + "." + method.getName(),
                        Arrays.toString(params));
            }
        };
    }
}

测试

package com.gblfy.async_task;

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.Future;
import java.util.concurrent.TimeUnit;

@Slf4j
@SpringBootTest
class AsyncServiceTest {


    @Autowired
    private AsyncService asyncService;

    @Test
     void contextLoads() throws Exception {
//        asyncService.asyncProcess01();
        Future<String> future= asyncService.asyncProcess02javascript();
    www.devze.com    log.info("Async Process02 return :->{}", future.get(1, TimeUnit.SECONDS));
    }

    @Test
    void contextLoads2() throws Exception {
         asyncService.asyncProcess03();
         Thphpread.sleep(3000);
    }
}

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