不要在某台机器上运行Spring @Scheduled任务 [英] Do not run Spring @Scheduled task on certain machine

问题描述

我们的网络应用程序几乎没有计划任务，我们非常喜欢Spring的这个功能，许多人已经开始依赖它了。我们有一台'试用'机器，与prod机器共享相同的配置/ db。由于此机器指向与prod机器相同的db，因此当它运行计划任务时 - 它可能会影响prod数据。有没有办法不在这台机器上运行Spring Scheduled任务？我们考虑过依赖机器名称，但是每次任务开始时都不想引入检查。有什么建议？

Our web app has few scheduled tasks and we like this feature of Spring so much, many have started relying on it. We have a 'pilot' machine which shares the same configuration/db as prod machines. Since this machine points to the same db as prod machines, when it runs a scheduled task - it may affect prod data. Is there a way to not run Spring Scheduled task on this machine? We thought of relying on the machine name, but dont want to introduce a check each time a task starts. Any suggestions?

推荐答案

使用Spring 3.1 Profiles它会非常简单，但是这里有一种方法可以在Spring 3.0中实现。

With Spring 3.1 Profiles it will be really easy, but here is a way you can do it in Spring 3.0.

在您的上下文中：

<task:annotation-driven executor="taskExecutor" scheduler="configScheduler"/>
<task:scheduler id="taskScheduler"/>
<task:executor id="taskExecutor"/>

使用 @Bean 来定义 configScheduler ，如果设置了系统属性 noScheduler ，则使用虚拟调度程序。

Use @Bean to define configScheduler, using a dummy scheduler if a system property noScheduler is set.

@Configuration
public class SchedulerConfig {
  @Resource(name="taskScheduler")
  ThreadPoolTaskScheduler taskScheduler;

  @Bean
  ThreadPoolTaskScheduler configScheduler() {
      ThreadPoolTaskScheduler scheduler = 
        System.getProperty("noScheduler") == null : taskScheduler ?
          new ThreadPoolTaskScheduler() {
              @Override public ScheduledFuture schedule(Runnable task, Trigger trigger) { return null; }  // Cron
              @Override public ScheduledFuture scheduleAtFixedRate(Runnable task, long period) { return null; }
              @Override public ScheduledFuture scheduleWithFixedDelay(Runnable task, long delay) { return null; }
          };

      return scheduler;
    }
  } 

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