ScheduledTimerTask - Period is not consistent

[Vikas Kapoor]

	<bean id="CSVTimerTask" class="com.CSVTimerTask">
    	<property name = "myService" ref="myService"/>
    </bean>
    
    <bean id="scheduledTimerTask" class="org.springframework.scheduling.timer.ScheduledTimerTask">
	    <property name="delay" value="90000" />
	    <property name="period" value="20000" />
	    <property name="timerTask" ref="CSVTimerTask" />
	    <property name="fixedRate" value="true"></property>
    </bean>
      
    <bean id="timerFactory" class="org.springframework.scheduling.timer.TimerFactoryBean">
		<property name="scheduledTimerTasks">
			<list>
				<ref bean="scheduledTimerTask"/>
			</list>
		</property>
		<property name="daemon" value="true"></property>
	</bean>

The run() method contains only logger statement as I just want to confirm it executes or not.

Here is the output,

[2010-07-12 16:06:35,140] INFO  timerFactory (   CSVTimerTask.java:30  ) - *********** CSVTimerTask.run() ***************
[2010-07-12 16:06:55,140] INFO  timerFactory (   CSVTimerTask.java:30  ) - *********** CSVTimerTask.run() ***************
[2010-07-12 16:07:15,140] INFO  timerFactory (   CSVTimerTask.java:30  ) - *********** CSVTimerTask.run() ***************
[2010-07-12 16:07:35,140] INFO  timerFactory (   CSVTimerTask.java:30  ) - *********** CSVTimerTask.run() ***************
[2010-07-12 16:07:45,453] INFO  timerFactory (   CSVTimerTask.java:30  ) - *********** CSVTimerTask.run() *************** // Problem
[2010-07-12 16:07:55,140] INFO  timerFactory (   CSVTimerTask.java:30  ) - *********** CSVTimerTask.run() ***************
[2010-07-12 16:08:05,453] INFO  timerFactory (   CSVTimerTask.java:30  ) - *********** CSVTimerTask.run() *************** // Problem
[2010-07-12 16:08:15,140] INFO  timerFactory (   CSVTimerTask.java:30  ) - *********** CSVTimerTask.run() ***************
[2010-07-12 16:08:25,453] INFO  timerFactory (   CSVTimerTask.java:30  ) - *********** CSVTimerTask.run() *************** // Problem  and so on
[2010-07-12 16:08:35,140] INFO  timerFactory (   CSVTimerTask.java:30  ) - *********** CSVTimerTask.run() ***************
[2010-07-12 16:08:45,453] INFO  timerFactory (   CSVTimerTask.java:30  ) - *********** CSVTimerTask.run() ***************
[2010-07-12 16:08:55,140] INFO  timerFactory (   CSVTimerTask.java:30  ) - *********** CSVTimerTask.run() ***************
[2010-07-12 16:09:05,453] INFO  timerFactory (   CSVTimerTask.java:30  ) - *********** CSVTimerTask.run() ***************
[2010-07-12 16:09:15,140] INFO  timerFactory (   CSVTimerTask.java:30  ) - *********** CSVTimerTask.run() ***************
[2010-07-12 16:09:25,453] INFO  timerFactory (   CSVTimerTask.java:30  ) - *********** CSVTimerTask.run() ***************
[2010-07-12 16:09:35,140] INFO  timerFactory (   CSVTimerTask.java:30  ) - *********** CSVTimerTask.run() ***************
[2010-07-12 16:09:45,453] INFO  timerFactory (   CSVTimerTask.java:30  ) - *********** CSVTimerTask.run() ***************
[2010-07-12 16:09:55,140] INFO  timerFactory (   CSVTimerTask.java:30  ) - *********** CSVTimerTask.run() ***************

Why the period between two successive execution does not remain consistent (20 second that I have declared)?

Cross Post : http://forum.springsource.org/showthread.php?t=91991

[Christophe Verré]

Strange. After the fourth call, it looks like the period was been set to 10 seconds. You're not accessing the ScheduledTimerTask, are you ?

[Vikas Kapoor]

Nope I do not. Anything to do with few properties?

[Christophe Verré]

Can you show your main class (the one with the main(String... args) method) ?

[Christophe Verré]

BeForthrightWhenCrossPostingToOtherSites. (http://forum.springsource.org/showthread.php?p=308801)

[Vikas Kapoor]

It's a web app. So through dependency injection it stats the timer. And it executes the run method of CSVTimerTask class. CSVTimerTask class requires to extends TimerTask.

To be precise , I have used Spring reference documentation. Spring 2.5.6 . http://static.springsource.org/spring/docs/2.5.x/reference/scheduling.html#scheduling-jdk-timer

Thanks for your time.

[Vikas Kapoor]

Christophe Verré wrote:BeForthrightWhenCrossPostingToOtherSites. (http://forum.springsource.org/showthread.php?p=308801)

Yup. and I was about to give the link in my first thread.

[Christophe Verré]

Thinking about it again, it seems that there are two timers running here. I wonder if you're loading your context file twice ? Please show your web.xml.

[Vikas Kapoor]

Web.xml

<context-param>
		<param-name>contextConfigLocation</param-name>
		<param-value>
			/WEB-INF/projectname-servlet.xml
	  	   	classpath:resources/spring/projectname-customer.xml
			classpath:resources/spring/projectname-employee.xml
			classpath:resources/spring/projectname-project.xml
			classpath:resources/spring/projectname-manufacturer.xml
			classpath:resources/spring/projectname-tools.xml
			classpath:resources/spring/applicationContext-security.xml
		</param-value>
	</context-param>

<filter>
        <filter-name>springSecurityFilterChain</filter-name>
        <filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class>
    </filter>

    <filter-mapping>
      <filter-name>springSecurityFilterChain</filter-name>
      <url-pattern>/*</url-pattern>
    </filter-mapping>

<listener>
		<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
	</listener>

    <!-- to keep Spring Security updated about session lifecycle events -->	
    <listener>
  		<listener-class>org.springframework.security.ui.session.HttpSessionEventPublisher</listener-class>
	</listener>

	<servlet>
		<servlet-name>projectname</servlet-name>
		<servlet-class>
			org.springframework.web.servlet.DispatcherServlet
		</servlet-class>
		<load-on-startup>1</load-on-startup>
	</servlet>
	
	
	
	<servlet-mapping>
		<servlet-name>projectname</servlet-name>
		<url-pattern>*.htm</url-pattern>
	</servlet-mapping>
	<servlet> 

[Christophe Verré]

projectname-servlet.xml is loaded twice. Once by the DispatcherServlet, once by the ContextLoaderListener.

[Vikas Kapoor]

I can not remove it from Dispatcher Servlet right?
Should I remove it from Context Loader Listner?

[Christophe Verré]

Should I remove it from Context Loader Listner?

Yes

[Vikas Kapoor]

Christophe Verré wrote:

Should I remove it from Context Loader Listner?

Yes

This leads me to another issue.
,

Error creating bean with name 'customerAddressService' defined in class path resource [resources/spring/projectname-customer.xml],
Cannot resolve reference to bean 'FacadeLookup' while setting bean property 'facadeLookup'; nested exception is
 org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'FacadeLookup' is defined

The reason behind this error is , I have declared this bean in projectname-servlet.xml file. Now as I have remove it from contextConfigLocation, it executes next file which is projectname-customer.xml file. and this file uses FacadeLookup . so obviously it will throw above error.

My questions are,
1) How to resolve this issue?
2) Should not projectname-servlet.xml execute very first and others after that as it is main xml file?
3) How ContextLoaderListener uses value of contextConfigLocation (application wide param)?

Thank you for your time.

[Christophe Verré]

1)Make a new context file, move everything you can from projectname-servlet.xml into it, except the scheduler.
2)In a web application, listeners are instanciated before servlets. It's not just Spring.
3)Check the org.springframework.web.context.ContextLoader API