Syed Mahdi [http://community.jboss.org/people/armahdi] created the discussion

"Timer in jBPM,"

To view the discussion, visit: http://community.jboss.org/message/590244#590244

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hi All,


I am trying to create and incorporate a timer in my jBPM process definition I 
have found some examples but they dont really state what they exactly were 
doing:

Like what is the difference between (Impl 1): 


>  <task-node name="step1" end-tasks="true">
>  <event type="node-enter">
>  <create-timer name="myTimeout" duedate="1 minute" transition="toExpire">
>  <action name="testWriteOut" expression="#{timerLogger.logTimer}"/>
>  </create-timer>
>  </event>
>  <task name="taskA" description="task 1">
>  <assignment actor-id="userA" />
>  </task>
>  <transition name="finished" to="end"/>
>  <transition name="toExpire" to="expire"/>
>  </task-node>

And this (Impl 2):


> <task-node name="timerTest">
>  
>  <task name="taskA" description="TimerTestTask">
>  <assignment actor-id="userA" />
>   <timer duedate="1 minute" transition="finished">
>  <action expression="#{timerTestWorkflow.logTimerFired}" />
>  </timer>
>  </task>
>  <transition name="finished" to="end" />
>  </task-node>


what is the basic difference between the two implementation. If i wanted a 
timer that will be executed after the task has ended which one is best for my 
use case. My use case is like this... UserA is assigned  taskA and when he 
finishes, the jBPM waits for 1 hour and then assigns TaskB it to User B who can 
actually end the process. 

Other way of seeing it is like UserA is assigned TaskA and when he finishes the 
taskA the token goes to task B and assigns it to UserB and waits there for 1 
hour and notifies the UserB that timer is expired so he can end it. Or do you 
think I shud make a state for the timer it self like (Impl 3):

> <state name="timerstate">
>  <timer name="wait one minute" duedate="1 minute" transition="toTaskB"> 
>  </timer>
>  <transition to="taskB" name="toTaskB"></transition>
> </state>
> 
 and then transfer to tasknode B where taskB is assigned to userB.  but then it 
wont be assigned to any user in this state so it will not show up in the pooled 
task either. 

in impl 1 above if after 1 minute it tranistions to "toExpire" then how does 
the task in the task node gets executed
in Impl2 does the timer gets fired after 1 minute or instantly when it reaches 
the tasknode and if within a minute the userA does not do anything it 
finishes??? does it mean that userA will be assigned the task for 1 minute 
only... Is there a possibility then to fire an action after the 1 miute as 
well. ?? 


off topic: why arent there that many good examples for the timer. 

Thanks
ARMahdi
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