spring-boot 中默认的调度程序池大小是多少?

问题描述

我正在使用 spring-boot 和 @Scheduled 注释来执行一些任务.

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

如何知道spring-boot默认的定时任务池大小是多少?

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

原因:下面的类不是并行执行作业，而是一个接一个地执行.可能默认只配置了单线程执行器?

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:第一个作业完成后执行第二个作业.

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

推荐答案

是的，所有 @Scheduled 方法默认共享一个线程.可以通过定义一个 @Configuration 来覆盖这个行为，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 方法共享大小为 100 的线程池.

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

这篇关于spring-boot 中默认的调度程序池大小是多少?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！