在群集环境中运行的Spring Scheduled Task [英] Spring Scheduled Task running in clustered environment

问题描述

我正在编写一个具有cron作业的应用程序，该作业每60秒执行一次.该应用程序被配置为在需要时扩展到多个实例.我只想每60秒(在任何节点上)在1个实例上执行任务.开箱即用，我找不到解决方案，但令我惊讶的是，之前没有多次被问到.我正在使用Spring 4.1.6.

I am writing an application that has a cron job that executes every 60 seconds. The application is configured to scale when required onto multiple instances. I only want to execute the task on 1 instance every 60 seconds (On any node). Out of the box I can not find a solution to this and I am surprised it has not been asked multiple times before. I am using Spring 4.1.6.

    <task:scheduled-tasks>
        <task:scheduled ref="beanName" method="execute" cron="0/60 * * * * *"/>
    </task:scheduled-tasks>

推荐答案

有一个 ShedLock 恰好可以达到这个目的的项目.您只需注释执行时应锁定的任务

There is a ShedLock project that serves exactly this purpose. You just annotate tasks which should be locked when executed

@Scheduled( ... )
@SchedulerLock(name = "scheduledTaskName")
public void scheduledTask() {
   // do something
}

配置Spring和LockProvider

Configure Spring and a LockProvider

@Configuration
@EnableScheduling
@EnableSchedulerLock(defaultLockAtMostFor = "10m")
class MySpringConfiguration {
    ...
    @Bean
    public LockProvider lockProvider(DataSource dataSource) {
       return new JdbcTemplateLockProvider(dataSource);
    }
    ...
}

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