我想根据用户从UI提供的计划配置动态调度作业。当用户从UI保存新的计划配置时,该进程必须使用新的计划参数调用新作业。这样可以有n种配置来执行相同的工作。 Spring支持作业细节的实现和触发,如下所示。
定义jobdetail:
@Bean
public JobDetail jobDetail() {
return JobBuilder.newJob().ofType(SampleJob.class)
.storeDurably()
.withIdentity("Qrtz_Job_Detail")
.withDescription("Invoke Sample Job service...")
.build();
}
定义触发器:
@Bean
public Trigger trigger(JobDetail job) {
return TriggerBuilder.newTrigger().forJob(job)
.withIdentity("Qrtz_Trigger")
.withDescription("Sample trigger")
.withSchedule(simpleSchedule().repeatForever().withIntervalInHours(1))
.build();
}
如何根据用户提供的参数传递作业详细信息的参数并动态触发?
最简单的方法是通过扩展SpringBeanJobFactory和@Override
createJobInstance方法进行一些配置。然后你需要定义SchedulerFactoryBean,最后你的Scheduler:
@Configuration
public class SchedulerConfiguration {
public class AutowireCapableBeanJobFactory extends SpringBeanJobFactory {
private final AutowireCapableBeanFactory beanFactory;
@Autowired
public AutowireCapableBeanJobFactory(AutowireCapableBeanFactory beanFactory) {
Assert.notNull(beanFactory, "Bean factory must not be null");
this.beanFactory = beanFactory;
}
@Override
protected Object createJobInstance(TriggerFiredBundle bundle) throws Exception {
Object jobInstance = super.createJobInstance(bundle);
this.beanFactory.autowireBean(jobInstance);
this.beanFactory.initializeBean(jobInstance, null);
return jobInstance;
}
}
@Bean
public SchedulerFactoryBean schedulerFactory(ApplicationContext applicationContext) {
SchedulerFactoryBean schedulerFactoryBean = new SchedulerFactoryBean();
schedulerFactoryBean.setJobFactory(new AutowireCapableBeanJobFactory(applicationContext.getAutowireCapableBeanFactory()));
return schedulerFactoryBean;
}
@Bean
public Scheduler scheduler(ApplicationContext applicationContext) throws SchedulerException {
Scheduler scheduler = schedulerFactory(applicationContext).getScheduler();
scheduler.start();
return scheduler;
}
}
然后在应用程序的任何位置,例如在RestController中,您可以访问调度程序并安排新作业:
@RestController
public class ScheduleController {
@Autowired
private Scheduler scheduler;
@GetMapping(value = "/schedule/{detail}/{desc}")
public String scheduleJob(@PathVariable(value = "detail") String detail, @PathVariable(value = "desc") String desc) throws SchedulerException {
JobDetail job = newJob(detail, desc);
return scheduler.scheduleJob(job, trigger(job)).toString();
}
private JobDetail newJob(String identity, String description) {
return JobBuilder.newJob().ofType(SimpleJob.class).storeDurably()
.withIdentity(JobKey.jobKey(identity))
.withDescription(description)
.build();
}
private SimpleTrigger trigger(JobDetail jobDetail) {
return TriggerBuilder.newTrigger().forJob(jobDetail)
.withIdentity(jobDetail.getKey().getName(), jobDetail.getKey().getGroup())
.withSchedule(SimpleScheduleBuilder.repeatSecondlyForever(1))
.build();
}
}
您可以从Scheduler
控制所有日程安排(暂停,停止,重新启动,删除等...) - look at the documentation
这就是JobDataMap参数的用途。您可以使用这些参数将任意参数传递给作业和触发器。通常建议使用String参数值来避免各种序列化问题。 JobDataMap API提供了可用于将字符串值JobDataMap参数值转换为各种基本Java对象(Integer,Long,Double,Boolean等)的辅助方法。
请注意,可以在Trigger级别覆盖JobDetail级别上指定的JobDataMap参数。在JobDetail级别,您通常指定应该用于所有作业执行的公共参数和/或默认值,并覆盖这些默认值和/或在Trigger级别添加新参数。
有关详细信息,请参阅Quartz Javadoc: