2 Replies Latest reply on Jun 25, 2010 3:21 PM by tunmang

in jBPM 4.3, can a state node's handler choose its outgoing transition?

tunmang Jun 23, 2010 10:54 PM

Hi there,

For a particular process definition, we would like to add a state node which associates with an "end" event handler as shown below:

<event-listener class="com....components.TranscodeHandler" />

</on>

</state>

There will be a stand-alone application calling the "signal process" for this state node so that the TranscodeHandler class (implements EventListener) will receive the "end event". And the TranscodeHandler class will override the "notify" function to implement the logic to decide a final outgoing transition for this state node.

Is this doable in jBPM 4.3 ? If yes, how does the stand-alone application call the "signal process" ? And how does the (override) "notify" function set the final outgoing transition ?

Or this is doable in jBPM, but the approach is different from what we thought ?

Any advice is very appreciated.

1. Re: in jBPM 4.3, can a state node's handler choose its outgoing transition?

swiderski.maciej Jun 24, 2010 1:47 PM (in response to tunmang)

To me it looks like perfect scenario for custom activity. First you put your custom activity into wait state (implement execute method) next you can signal it (same way as for regular wait activity) and within signal method you could decide what transition to take.

Please have a look at user guide for details about custom activity: http://docs.jboss.com/jbpm/v4/userguide/html_single/#custom

In general, event listeners should not affect the flow of the process - in my opinion.

HTH
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2. Re: in jBPM 4.3, can a state node's handler choose its outgoing transition?

tunmang Jun 25, 2010 3:21 PM (in response to swiderski.maciej)

Hi Maciej:

Thank you so much for the information. We actually also thought about the "custom" node, but just want to know if "state" node can also do it or not. Thanks again.

Tun Mang
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