spring管理quartz生命周期之`SchedulerFactoryBean`

大家好，又见面了，我是你们的朋友全栈君。

spring管理quartz生命周期之SchedulerFactoryBean

spring通过SchedulerFactoryBean来管理quartz的生命周期。在spring容器启动时启动调度器，在spring容器关闭时停止调度器

FactoryBeanthat creates and configures a Quartz {@link org.quartz.Scheduler},manages its lifecycle as part of the Spring application context, and exposes the Scheduler as bean reference for dependency injection.

为了防止启动失败，我们可以通过实现ApplicationListener接口来手动判断定时任务调试器是否启动，若没有启动，可以再次启动:

@Component("quartzStarterListener")
public class QuartzStarterListener implements ApplicationListener { 
   

    private static final Logger LOGGER = LoggerFactory.getLogger(QuartzStarterListener.class);
    private boolean started = false;

    @Autowired
    private Scheduler scheduler;


    @Override
    public void onApplicationEvent(ApplicationEvent event) {

        if (event instanceof ContextRefreshedEvent){
            LOGGER.info("trying to refresh.>>>>>>>>>");
            try {
                if (!started && !scheduler.isStarted()){
                    started = true;
                    LOGGER.info("trying to start quartz.>>>>>>>>");
                    scheduler.start();
                    LOGGER.info("quartz has been started.>>>>>>>>");
                }
            } catch (SchedulerException e) {
                LOGGER.error("error occurred when starting quartz.>>>>>>>>", e);
                e.printStackTrace();
            }

        }else if (event instanceof ContextClosedEvent ||
                event instanceof ContextStoppedEvent){
            try {
                if (scheduler.isStarted()){
                    //等待所有定时任务执行完毕才停止
                    scheduler.shutdown(true);
                    LOGGER.info("quartz has been stopped.>>>>>>");
                }
            } catch (SchedulerException e) {
                LOGGER.error("error occurred when stopping quartz.>>>>>>>", e);
                e.printStackTrace();
            }
        }

    }
}

结果:

[2018-08-16 10:47:03.924] [ INFO] QuartzStarterListener trying to refresh.>>>>>>>>>
16-Aug-2018 10:47:03.929 信息 [RMI TCP Connection(5)-127.0.0.1] org.springframework.web.servlet.DispatcherServlet.initServletBean
FrameworkServlet 'springDispatcherServlet': initialization completed in 1947 ms
[2018-08-16 10:47:03,963] Artifact ssm:war exploded: Artifact is deployed successfully
[2018-08-16 10:47:03,963] Artifact ssm:war exploded: Deploy took 12,434 milliseconds

...
[2018-08-16 10:47:06.506] [ INFO] QuartzScheduler Scheduler scheduler_$_NON_CLUSTERED shutdown complete.
[2018-08-16 10:47:06.506] [ INFO] QuartzStarterListener quartz has been stopped.>>>>>>
[2018-08-16 10:47:06.518] [ INFO] QuartzStarterListener quartz has been stopped.>>>>>>