SpringBoot线程池使用

大家好，又见面了，我是你们的朋友全栈君。

一、线程池管理配置类

@Configuration
@EnableAsync
public class ExecutorConfig {
    private static final Logger logger = LoggerFactory.getLogger(ExecutorConfig.class);

    @Bean
    public Executor asyncTaskServiceExecutor () {
        logger.info("init asyncTaskServiceExecutor begin...");
        /* 线程池执行管理容器 */
        ThreadPoolTaskExecutor executor = new VisiableThreadPoolTaskExecutor();
         //配置核心线程数
        executor.setCorePoolSize(50);
        //配置最大线程数
        executor.setMaxPoolSize(300);
        //配置队列大小
        executor.setQueueCapacity(1000);
        //配置线程池中的线程的名称前缀
        executor.setThreadNamePrefix("async-service-");
        // rejection-policy：当pool已经达到max size的时候，并且队列已经满了，如何处理新任务
        // CallerRunsPolicy：不在新线程中执行任务，而是有调用者所在的线程来执行
        //DiscardPolicy: 直接丢弃
        executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
        //执行初始化
        executor.initialize();
        // 等待所有任务结束后再关闭线程池
        executor.setWaitForTasksToCompleteOnShutdown(true);
        logger.info("init asyncTaskServiceExecutor end...");
        return executor;
    }
}

二、VisiableThreadPoolTaskExecutor类

public class VisiableThreadPoolTaskExecutor extends ThreadPoolTaskExecutor {
    private static final Logger logger = LoggerFactory.getLogger(VisiableThreadPoolTaskExecutor.class);

    private void printCurrentThreadPoolInfo () {
        ThreadPoolExecutor threadPoolExecutor = getThreadPoolExecutor();
        if (null == threadPoolExecutor) {
            logger.info("当前异步线程池未完成初始化...");
            return;
        }
        logger.info("当前线程池情况：名称前缀-{},任务总数-[{}],已完成的任务总数-[{}],可调度执行的工作线程总数-[{}],任务队列大小-[{}]",
                this.getThreadNamePrefix(),
                threadPoolExecutor.getTaskCount(),
                threadPoolExecutor.getCompletedTaskCount(),
                threadPoolExecutor.getActiveCount(),
                threadPoolExecutor.getQueue().size()
        );
    }

    @Override
    public void execute(Runnable task) {
        printCurrentThreadPoolInfo();
        super.execute(task);
    }

    @Override
    public void execute(Runnable task, long startTimeout) {
        printCurrentThreadPoolInfo();
        super.execute(task, startTimeout);
    }

    @Override
    public Future<?> submit(Runnable task) {
        printCurrentThreadPoolInfo();
        return super.submit(task);
    }

    @Override
    public <T> Future<T> submit(Callable<T> task) {
        printCurrentThreadPoolInfo();
        return super.submit(task);
    }

    @Override
    public ListenableFuture<?> submitListenable(Runnable task) {
        printCurrentThreadPoolInfo();
        return super.submitListenable(task);
    }

    @Override
    public <T> ListenableFuture<T> submitListenable(Callable<T> task) {
        printCurrentThreadPoolInfo();
        return super.submitListenable(task);
    }

}

三、创建接口ThreadPoolAsyncTaskService

public interface ThreadPoolAsyncTaskService {
    //执行异步任务
    
    void executeAsync();
}

四、接口实现类

这里的 @Async(“asyncServiceExecutor”)中的名字asyncServiceExecutor为线程池配置管理中的方法名称；相当于是根据方法名称注入类；然后通过方法名称获取注入的类。

@Service
public class ThreadPoolAsyncTaskServiceImpl implements ThreadPoolAsyncTaskService {
    Logger logger = LoggerFactory.getLogger(ThreadPoolAsyncTaskServiceImpl.class);
   

    /**
     * 异步任务退费
     */
    @Override
    @Async("asyncTaskServiceExecutor")
    public void executeAsync() {
       //做业务逻辑处理即可
       logger.info("start executeAsync");
 
        try{
 
            Thread.sleep(1000);
 
        }catch(Exception e){
 
            e.printStackTrace();
 
        }
 
        logger.info("end executeAsync");

    }
}