spring-boot中的默认调度程序池大小是多少？ [英] What is the default scheduler pool size in spring-boot?

问题描述

我正在使用 spring-boot 和 @Scheduled 注释来执行某些任务。

I'm using spring-boot and @Scheduled annotation to execute some tasks.

如何在spring-boot中找出默认的计划任务默认池大小是什么？

How can I find out what the default pool size of scheduled tasks is by default in spring-boot?

原因：以下class不会并行执行作业，而是一个接一个地执行。也许默认只配置一个线程执行器？

Reason: the following class does not execute the jobs in parallel, but one after the other. Maybe only a single thread executor is configured by default?

@Service
public class ZipFileTesterAsync {

    @Scheduled(fixedDelay = 60000, initialDelay = 500)
    public void run() throws Exception {
        System.out.println("import 1");
        TimeUnit.MINUTES.sleep(1);
        System.out.println("import 1 finished");
    }

    @Scheduled(fixedDelay = 60000, initialDelay = 1000)
    public void run2() throws Exception {
        System.out.println("import 2");
        TimeUnit.MINUTES.sleep(1);
    }
}

结果：第二个作业在第一个完成后执行。

Result: the 2nd job is executed after the first finished.

推荐答案

是的，所有 @Scheduled 方法共享一个线程默认。
可以通过定义 @Configuration 来覆盖此行为，例如：

Yes, all @Scheduled methods share a single thread by default. It is possible to override this behavior by defining a @Configuration such as this:

@Configuration
public class SchedulingConfigurerConfiguration implements SchedulingConfigurer {

    @Override
    public void configureTasks(ScheduledTaskRegistrar taskRegistrar) {
        ThreadPoolTaskScheduler taskScheduler = new ThreadPoolTaskScheduler();
        taskScheduler.setPoolSize(100);
        taskScheduler.initialize();
        taskRegistrar.setTaskScheduler(taskScheduler);
    }
}

此示例确保所有 @Scheduled 方法共享一个大小为100的线程池。

This example ensures that all @Scheduled methods share a thread pool of size 100.

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