ThreadPoolTask​​Executor在计划类中被覆盖

Question

我有以下ThreadPoolTask​​Executor，它们是使用预期的核心/最大池大小配置创建的。

@Slf4j
@Configuration
public class ThreadPoolConfig {

    @Value("${corePoolSize}")
    private Integer corePoolSize;

    @Value("${queueCapacity}")
    private Integer queueCapacity;

    @Value("${maxPoolSize}")
    private Integer maxPoolSize;

    @Bean(name="myThreadPoolTaskExecutor")
    public ThreadPoolTaskExecutor myThreadPoolTaskExecutor() {       
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();       
        executor.setBeanName("myThreadPoolTaskExecutor");
        executor.setCorePoolSize(corePoolSize);
        executor.setQueueCapacity(queueCapacity);
        executor.setMaxPoolSize(maxPoolSize);
        executor.setThreadNamePrefix("my_thread_");
        executor.setWaitForTasksToCompleteOnShutdown(true);
        executor.initialize();
        log.debug("threadPoolTaskExecutor CorePoolSize is  : " + executor.getCorePoolSize());
        log.debug("threadPoolTaskExecutor MaxPoolSize is  : " + executor.getMaxPoolSize());
        return executor;
    }
}

当我的@scheduled方法运行时，最大池大小设置为默认值2147483647，我不明白为什么它没有使用上面配置的ThreadPoolTaskExecutor：

@EnableScheduling
public class SchedulingConfig {

}


@Component
public class Scheduler {

    @Autowired
    @Qualifier("myThreadPoolTaskExecutor")
    private ThreadPoolTaskExecutor threadPoolTaskExecutor;


    @Scheduled(fixedRateString = "${fixedRate}")
    public void invokeScheduledThread() {

        while (threadPoolTaskExecutor.getActiveCount() <= threadPoolTaskExecutor.getMaxPoolSize()) {
            log.debug("Active Thread Pool count is : " + threadPoolTaskExecutor.getActiveCount() + ", Max Thread Pool count is : " + threadPoolTaskExecutor.getMaxPoolSize() + " on the scheduled Thread : " + Thread.currentThread().getName());

            //call a service to retrieve some items to process 
            threadPoolTaskExecutor.execute(Some Object that implements runnable);
        }
    }
}

输出：

活动线程池计数为：0，最大线程池计数为：2147483647在计划的线程上：task-scheduler-1

我在[{1}} initialise()方法中加入了一个断点 看起来这个方法被调用了3次，两次使用了一个ThreadName前缀＆＃34; my_thread _＆＃34; 对于一个名为＆＃34; org.springframework.scheduling.concurrent.ExecutorConfigurationSupport＆＃34; ThreadName前缀为＆＃34; taskScheduler＆＃34;。

有谁知道为什么我不能在Scheduler类中使用我自己的task-scheduler-？

我想使用默认的@Scheduler每x秒在一个线程上运行，并使用我自己的ThreadPoolTask​​Executor创建X个Thread。

Answer 1

使用ThreadPoolTask​​Scheduler而不是ThreadPoolTask​​Executor。 例如：

@Configuration
public class SpringSchedulerConfig {

    private static final int THREAD_POOL_SIZE = 5;

    @Bean
    public ThreadPoolTaskScheduler getScheduler() {

        ThreadPoolTaskScheduler threadPoolTaskScheduler = new ThreadPoolTaskScheduler();

        //we want every Job in a separate Thread.
        threadPoolTaskScheduler.setPoolSize(THREAD_POOL_SIZE);

        return threadPoolTaskScheduler;
    }

}