ScheduledTimerTask combiled with TimerTask

[mstachu]

Hi,

Let me describe what I want to acheive.

Once a day a cron scheduller will start (run) TimerTask, and couple minutes later will switch if off (cancel), TimerTask must execute periodically a method (operation to perform a particular task). What I managed to achieve is starting/stoping TimerTask via CronTriggerBean class, but this timer task executes only once instead of every five seconds.
configuration looks like :

<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd">

	<!--<bean id="exampleBusinessObject" class="scb.scheduler.Switcher" />-->
	
	<!-- lookup the directory and  -->
	<bean id="resourceLoader" class="scb.scheduler.ExternalResourceLoader" />

	<bean id="jobStart"
		class="org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean">
		<property name="targetObject" ref="resourceTimedTask" />
		<property name="targetMethod" value="startPolling" />
		<property name="concurrent" value="false" />
	</bean>

	<bean id="jobStop"
		class="org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean">
		<property name="targetObject" ref="resourceTimedTask" />
		<property name="targetMethod" value="stopPolling" />
		<property name="concurrent" value="false" />
	</bean>

	<bean id="cronTriggerStart"
		class="org.springframework.scheduling.quartz.CronTriggerBean">
		<property name="jobDetail" ref="jobStart" />
		<property name="cronExpression" value="0 21 7 * * ?" />
	</bean>
	<bean id="cronTriggerStop"
		class="org.springframework.scheduling.quartz.CronTriggerBean">
		<property name="jobDetail" ref="jobStop" />
		<property name="cronExpression" value="0 22 7 * * ?" />
	</bean>

	<bean
		class="org.springframework.scheduling.quartz.SchedulerFactoryBean">
		<property name="triggers">
			<list>
				<ref bean="cronTriggerStart" />
				<ref bean="cronTriggerStop" />
			</list>
		</property>
	</bean>
	<bean id="resourceTimedTask" class="scb.scheduler.Switcher">
		<!-- wait 10 seconds before starting repeated execution -->
		<property name="delay" value="10000" />
		<!-- run every 50 seconds -->
		<property name="period" value="5000" />
		<property name="timerTask" ref="resourceLoader" />
	</bean>
	<!-- Timer start
	<bean id="timerFactory"
		class="org.springframework.scheduling.timer.TimerFactoryBean">
		<property name="scheduledTimerTasks">
			<list>
				<ref local="resourceTimedTask" />
			</list>
		</property>
	</bean>
 -->	
</beans>

and java classes:

public class ExternalResourceLoader  extends TimerTask {

	@Override
	public void run() {
		System.out.println("Hello World !!");
		
	}

	
}

public class Switcher extends ScheduledTimerTask{
	private static Logger logger = Logger.getLogger( Switcher.class.getName());	
	public void startPolling(){
		//logger.info("\n\nSytarting process ");
		System.out.println("STARTING");
		
		getTimerTask().run();
	}
	
	public void stopPolling(){
		//logger.info("\n\nStoping process ");
		System.out.println("STOPPING");		
		getTimerTask().cancel();
	}
}

Thank you for suggestions and ideas
M.

[karldmoore]

So you want a timer task that starts up for a period of time every day, and within that period runs every five seconds?

[mstachu]

Yes, this is exaclty what I want

[Mike Bingham]

Could you accomplish what you want with a single Quartz cron trigger like:

<property name="cronExpression" value="0/5 21 7 * * ?" />

instead of a start/stop trigger and separate TimerTask?

[mstachu]

No, I want to execute task periodcaly every 5 sec. within a specific time window. What you propose is executing task throughout the day (unlimited time window).

[Mike Bingham]

The following cron expression should fire every 5 seconds only between 7:21-7:22 each day:

<property name="cronExpression" value="0/5 21 7 * * ?" />

Perhaps I'm just misunderstanding something here.