【SpringBoot】ThreadPoolTaskExecutor使用

Note

springboot线程池使用，ThreadPoolTaskExecutor是springboot基于ThreadPoolExcutor再封装的，我们可以注册到Bean容器，单实例多线程的情况下，去使用该线程池。缺点是非懒加载，初始化需要内存

Github

地址：https://github.com/ithuhui/hui-base-java
分支：master
模块：【hui-base-thread】
位置：com.hui.base.thread.springboot

Code

Config

该配置类把ThreadPoolTaskExecutor注册成SpringBean

@Configuration
public class ThreadPoolExcutorsConfig {
     
    @Bean
    public ThreadPoolTaskExecutor threadPoolTaskExecutor() {
     
        ThreadPoolTaskExecutor poolTaskExecutor = new ThreadPoolTaskExecutor();

        // 核心线程数
        poolTaskExecutor.setCorePoolSize(5);

        //最大线程数
        poolTaskExecutor.setMaxPoolSize(20);

        //空闲存活时间
        poolTaskExecutor.setKeepAliveSeconds(60);

        //队列数量
        poolTaskExecutor.setQueueCapacity(2000);

        //线程名字前缀
        poolTaskExecutor.setThreadNamePrefix("Hui-Thread-");

        // 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，而是有调用者所在的线程来执行
        poolTaskExecutor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());

        poolTaskExecutor.initialize();

        return poolTaskExecutor;
    }

}

ThreadPool

CountdownLatch为了让线程全部执行完再运行下面程序

@Service
@Slf4j
public class SpringbootThreadService {
     
    @Autowired
    private ThreadPoolTaskExecutor threadPoolTaskExecutor;

    public void testThread() throws InterruptedException {
     
        int countNum = 10000;
        final CountDownLatch countDownLatch = new CountDownLatch(countNum);
        for (int i = 0; i < countNum; i++) {
     
            threadPoolTaskExecutor.execute(new Counter(i,countDownLatch));
        }
        countDownLatch.await();
    }

    @AllArgsConstructor
    class Counter implements Runnable{
     
        private Integer count;
        private CountDownLatch countDownLatch;

        @Override
        public void run() {
     
            log.info("my - count {}" , count);
            log.info("latch - count {}",countDownLatch.getCount());
            countDownLatch.countDown();
        }
    }
}

Test

public class SpringbootThreadServiceTest extends BaseJunitTest {
     

    @Autowired
    private SpringbootThreadService springbootThreadService;

    @Test
    public void testThread() throws InterruptedException {
     
        springbootThreadService.testThread();
    }
}