@postConstruct和@schedule with cron

发布于 2025-02-05 10:34:22 字数 572 浏览 3 评论 0 原文

在运行该应用程序后，我使用以下代码 - 刺管很长一段时间来触发导出。

@PostConstruct
@Scheduled(cron = "${" + EXPORT_SCHEDULE + "}")
public void exportJob()
{
    exportService().exportTask();
}

在更新了Spring-boot 2.6.x之后，根据“循环bean定义”的策略变得更加严格，我再也无法对此方法使用两种注释。一些答案建议将@postConstruct合并到@scheduled中，为 initiaLdelay = 0 ，但是crontab和@scheduled的其他属性不兼容。导致以下例外：

Caused by: java.lang.IllegalStateException: Encountered invalid @Scheduled method 'exportJob': 'initialDelay' not supported for cron triggers

原文

I was using the following code-snippet for a long time to trigger an export right after the application was run and as well at the provided crontab.

@PostConstruct
@Scheduled(cron = "${" + EXPORT_SCHEDULE + "}")
public void exportJob()
{
    exportService().exportTask();
}

After updating to Spring-Boot 2.6.x the policy according to "cyclic bean definition" got stricter and I couldn't use both annotations on this method anymore. Some answers recommended merging the @PostConstruct into the @Scheduled as initialDelay = 0 but crontab and the other properties of @Scheduled are not compatible. Resulting in following exception:

Caused by: java.lang.IllegalStateException: Encountered invalid @Scheduled method 'exportJob': 'initialDelay' not supported for cron triggers

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关于从前 2025-02-12 10:34:22

另一个解决方案可能是实现A bean。该界面包含 run（）方法，该方法是在应用程序启动之后执行的

@Bean
CommandLineRunner cronJobRunner(CronJobService cronJobService) {
  return args ->  cronJobService.cronJob();
}

Another solution may be to implement a CommandLineRunner bean. This interface contains a run() method that is executed after the application startup

@Bean
CommandLineRunner cronJobRunner(CronJobService cronJobService) {
  return args ->  cronJobService.cronJob();
}

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寒江雪… 2025-02-12 10:34:22

我发现的一个工作解决方案是仅使用@scheduled注释，但也有另一种方法是用@scheduled和 initiaLdelay = 0 注释的方法，它只是代理另一种方法。

@Scheduled(cron = "${" + EXPORT_SCHEDULE + "}")
public void cronJob()
{
    exportService().exportTask();
}

@Scheduled(fixedRate = Integer.MAX_VALUE, initialDelay = 0)
public void exportJob()
{
    cronJob();
}

从理论上讲，cronjob被更频繁地触发，因此我选择了进行服务呼叫。一个人也可以朝相反的方向构建呼叫链。

A working solution I found was to use just the @Scheduled annotation but also have another method be annotated with @Scheduled and initialDelay=0 which just proxies the other method.

@Scheduled(cron = "${" + EXPORT_SCHEDULE + "}")
public void cronJob()
{
    exportService().exportTask();
}

@Scheduled(fixedRate = Integer.MAX_VALUE, initialDelay = 0)
public void exportJob()
{
    cronJob();
}

In theory, the cronJob is triggered more often, hence I chose it to do the service call. One could structure the call chain in the opposite direction as well.

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