初探quartz scheduler

最新推荐文章于 2024-07-26 15:55:41 发布

最新推荐文章于 2024-07-26 15:55:41 发布 · 82 阅读

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#java

本文介绍了Quartz作为任务调度框架在Spring环境中的配置及使用方法。包括如何定义任务（Job）与触发器（Trigger），并提供了具体示例代码。

quartz是opensymphony提供的用来做SCHEDULE的框架

在spring中通过org.springframework.scheduling.quartz.SchedulerFactoryBean来获得Schedule类

	<bean id= class= scope=>

		<!-- set quartz scheduler factory configuration location -->

		<!-- <property name= value= /> -->

		<!-- 系统会在启动时加载 -->

		<property name= value= />

	</bean>

	<bean id= class= scope=>

		<property name= ref= />

	</bean>

QUARTZ中有Job与Trigger两种概念

一.Job详细描述具体的任务运行代码实现
1.新增一个任务到scheduler

JobDetail job =  JobDetail(taskName, Scheduler.DEFAULT_GROUP,DefaultQuartzJob.class);

JobDataMap jobDataMap = job.getJobDataMap();

jobDataMap.put(, task);

job.setDurability();

scheduler.addJob(job, );

==>DefaultQuartzJob

  DefaultQuartzJob  Job 

  Logger logger = Logger.getLogger(DefaultQuartzJob.class);

  execute(JobExecutionContext ctx)  JobExecutionException 
		JobDataMap jobDataMap = ctx.getJobDetail().getJobDataMap();

		TaskTO task = (TaskTO) jobDataMap.get();


		Task entryTask = task.getEntryTask();

 (entryTask == ) 
			logger

					.error( + task.getName()

							+ );
;



		TaskContext taskContext =  DefaultTaskContext();


		JobDataMap triggerDataMap = ctx.getTrigger().getJobDataMap();

		String[] keys = triggerDataMap.getKeys();
 (keys != ) 
 ( i = 0; i < keys.length; i++) 
				Object obj = triggerDataMap.get(keys[i]);
 (obj  String[]) 
					String [] data=(String[]) obj;
(data.length>0)
					taskContext.setParameter(keys[i], data[0]);


 (obj  String)
					taskContext.setParameter(keys[i], (String)obj);



 

			TaskManage tm = (TaskManage) triggerDataMap

					.get(TaskManage.TASKMANAGE_ATTRIBUTE_NAME);

			tm.addTriggerExecuteTimes(triggerDataMap

					.getString(TaskManage.TRIGGER_ATTRIBUTE_NAME));
  (TaskException e) 
			logger.error(
 + task.getName(), e);

 

			entryTask.process(taskContext);
  (TaskException e) 
			logger.error(
 + task.getName(), e);

==>TASK接口,继承它可以实现不同的任务实现

  Task



  process(TaskContext cxt)  TaskException;


 String getName();

2.从scheduler中删除一个任务

scheduler.deleteJob(taskName, Scheduler.DEFAULT_GROUP);

二.Trigger定时器,任务与定时器是一对多的关系
1.新建Trigger,初步分为CRONTRIGGER,SIMPLETRIGGER

 (TRIGGER_CRON.equals(triggerType)) 

				trigger =  CronTrigger(triggerName, Scheduler.DEFAULT_GROUP,

						taskName, Scheduler.DEFAULT_GROUP, validStartTime,

						validEndTime, triggerPattern);

				trigger.setMisfireInstruction(CronTrigger.MISFIRE_INSTRUCTION_DO_NOTHING);
  

				trigger =  SimpleTrigger(triggerName,

						Scheduler.DEFAULT_GROUP, taskName,

						Scheduler.DEFAULT_GROUP, validStartTime, validEndTime,

						repeatCount, repeatInterval);

				trigger.setMisfireInstruction(SimpleTrigger.MISFIRE_INSTRUCTION_RESCHEDULE_NEXT_WITH_EXISTING_COUNT);


 

			scheduler.scheduleJob(trigger);

			logger.debug( + trigger.getName()

					+ );
  (SchedulerException e) 
			logger.error( + e.getMessage()

					+  + triggerName

					+ , e);
  TaskException(,  + e.getMessage()

					+  + triggerName

					+ , e);

2.删除Trigger

 
			scheduler.unscheduleJob(triggerName, Scheduler.DEFAULT_GROUP);
  (SchedulerException e) 
			logger.error( + e.getMessage()

					+  + triggerName

					+ , e);
  TaskException(,  + e.getMessage()

					+  + triggerName

					+ , e);

ps:以上代码片段只提供参考,不可能运行成功,原因是没有贴出全部依赖代码.scheduler的所有方法都是官方提供,可以使用.