Hyland Connect

xjshangguan · ‎12-17-2012

Hi,

I have learned in my own testings (jobExecutorActivate=true) and from the forums that timer boundary event is not supported for service task. Can anyone confirm? This will impact us significantly because most of our flow components are service tasks either calling external web services or java classes executing locally. We basically would like to time all activities in case of any unresponsiveness of elements, just like Autosys' Max Run Time.

Oracle has this implemented for sure. Although we are always able to implement a time checking thread running in parallel with the java task, it is not so elegant even in workflow diagram perspective. Does anyone have any kind of workaround?

Happy Holidays

Sean

javacorner · ‎03-22-2015

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Dears jbarrez
, ALL,

For the work
around that you sent here before of <a
href="http://forums.activiti.org/comment/14426#comment-14426">#2</a> which is “

"Now,
the best practice is to have a short-lived service task, that simply triggers
an external something. After the service task, there should be a receive task.
the external entity can then trigger the process instance again. That way, the
transactions are short, as they should be. If you need a timer, just put it on
the receive task."

I have similar scenario [My the
process calls external backend system]
and I am trying to use the receivetask .

You told “that simply triggers an external
something” Now I
want some timer to send this signal to “receivetask” in order to let the process to retry to call the external backend
system.

How can I
implement timer ? Is it Timer catching event or timer boundary event or what ?

My process definition
is like the following:

<process
id="TimerProcess" name="Timer Process" isExecutable="true">

 <startEvent
id="startevent1" name="Start">

 <extensionElements>

 <activiti:executionListener event="start"
class="me.ffusion.bpm.listeners.InmaEventListener"></activiti:executionListener>

 </extensionElements>

 </startEvent>

 <serviceTask id="servicetaskInitialize" name="initialize" activiti:class="me.ffusion.bpm.javaDelegates.Initialize">

 <extensionElements>

 <activiti:executionListener event="start"
class="me.ffusion.bpm.listeners.InmaEventListener"></activiti:executionListener>

 </extensionElements>

 </serviceTask>

 <serviceTask id="servicetaskCallBackend" name="Call Backend" activiti:class="me.ffusion.bpm.javaDelegates.CallBackend">

 <extensionElements>

 <activiti:executionListener event="start"
class="me.ffusion.bpm.listeners.InmaEventListener"></activiti:executionListener>

 </extensionElements>

 </serviceTask>

 <sequenceFlow id="flow1" sourceRef="servicetaskInitialize"
targetRef="servicetaskCallBackend"></sequenceFlow>

 <sequenceFlow id="flow4" sourceRef="startevent1"
targetRef="servicetaskInitialize"></sequenceFlow>

 <sequenceFlow id="flow5" sourceRef="servicetaskCallBackend"
targetRef="isCallBackendSuccess"></sequenceFlow>

 <serviceTask id="servicetaskContinue" name="Continue" activiti:class="me.ffusion.bpm.javaDelegates.NoAction"></serviceTask>

 <endEvent
id="endevent1" name="End"></endEvent>

 <sequenceFlow id="flow10" sourceRef="servicetaskContinue"
targetRef="endevent1"></sequenceFlow>

 <receiveTask id="receivetask1" name="wait for timer"></receiveTask>

 <exclusiveGateway id="isCallBackendSuccess" name="Is Call Backend Success" default="continue"></exclusiveGateway>

 <sequenceFlow id="continue" sourceRef="isCallBackendSuccess"
targetRef="servicetaskContinue"></sequenceFlow>

 <sequenceFlow id="backerror" sourceRef="isCallBackendSuccess"
targetRef="receivetask1"></sequenceFlow>

 <sequenceFlow id="flow13" sourceRef="receivetask1"
targetRef="servicetaskCallBackend"></sequenceFlow>

 </process>

 

 

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jbarrez · ‎03-24-2015

Yes, a boundary timer event on the receive task would do that.

Hyland Connect

Timer boundary event not supported for Service Task?