java - Tomcat 被杀死时 Quartz 当前正在执行的作业

Question

有一点不太清楚。假设我全天随机安排工作，每项工作需要 30 分钟才能运行。假设我有五个这样的工作在运行，而 Tomcat 被杀死了。当我用我的应用程序启动 Tomcat 时作业会重新启动，还是当前正在运行的作业会丢失，因为它们已经被触发？

Answer 1

简答，默认情况下，当前正在运行的 Jobs 被认为已解雇并且不会恢复

..但是您可以在构建作业 (JobDetail) 时设置 requestRecovery 属性，以告诉 Quartz 在崩溃的情况下恢复正在运行的作业，也就是“硬关机” .

引用官方文档here在页面底部:

RequestsRecovery - if a job "requests recovery", and it is executing during the time of a 'hard shutdown' of the scheduler (i.e. the process it is running within crashes, or the machine is shut off), then it is re-executed when the scheduler is started again. In this case, the JobExecutionContext.isRecovering() method will return true.

所以你可以这样做:

import static org.quartz.JobBuilder.*;

...

JobDetail job = newJob(MyJob.class)
           .withIdentity("myJob", "group1")
           .requestRecovery(true) //This is the guy!
           .build();

...