Spring @Scheduled批注随机延迟 [英] Spring @Scheduled annotation random delay

问题描述

我正在使用Spring框架中的@Scheduled注释来调用方法.但是我的设置中有多个节点，我不希望它们都完全同时运行.因此，我想为初始延迟设置一个随机值，以使它们彼此抵消.

I am using the @Scheduled annotation from Spring framework to invoke a method. But I have multiple nodes in my setup and I do not want them to all run at exactly the same time. So I'd like to set a random value to the initial delay to offset them from each other.

import org.springframework.scheduling.annotation.Scheduled;

@Scheduled(fixedRate = 600000, initialDelay = <random number between 0 and 10 minutes> )

不幸的是，我只允许在这里使用一个常量表达式.还有其他解决方法吗?我想到了使用Spring表达式语言.

Unfortunately, I am only allowed to use a constant expression here. Is there any other way around this? I thought of using Spring expression language.

推荐答案

您可以通过Spring表达式语言配置initialDelay:

You can configure the initialDelay through Spring Expression Language:

@Scheduled(fixedRate = 600000, initialDelayString = "#{ T(java.util.concurrent.ThreadLocalRandom).current().nextInt(10*60*1000) }" )

我目前没有IDE可以测试该代码，因此您可能需要稍作修改.

I don't have an IDE to test that code right now, so you may need to adapt that a bit.

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