topic Re: How can I get process variables in conditionExpression? in Alfresco Archive

How can I get process variables in conditionExpression?

al_lv — Mon, 28 Mar 2011 15:36:56 GMT

Hello forum,my process should run a certain path dependent on a value of one process variable.How can I implemet this with exclusive gateway and conditionExpression?I didn't fount no example in UserGuide… Kind regards.Alexej

Re: How can I get process variables in conditionExpression?

frederikherema1 — Tue, 29 Mar 2011 06:29:26 GMT

Below an extract from the userguide, showing 3 different flows out of the gateway, which depend on process-variable 'input'


<exclusiveGateway id="exclusiveGw" name="Exclusive Gateway" />
    
<sequenceFlow id="flow2" sourceRef="exclusiveGw" targetRef="theTask1">
  <conditionExpression xsi:type="tFormalExpression">${input == 1}</conditionExpression>
</sequenceFlow>
    
<sequenceFlow id="flow3" sourceRef="exclusiveGw" targetRef="theTask2">
  <conditionExpression xsi:type="tFormalExpression">${input == 2}</conditionExpression>
</sequenceFlow>
    
<sequenceFlow id="flow4" sourceRef="exclusiveGw" targetRef="theTask3">
  <conditionExpression xsi:type="tFormalExpression">${input == 3}</conditionExpression>
</sequenceFlow>

Re: How can I get process variables in conditionExpression?

al_lv — Wed, 30 Mar 2011 09:30:45 GMT

oh! sorry, I was satisfied $input variable sould be defined in the process_defintion.bpmn20.xml and not programmatically on the start of the process.

I will try this way.

Another question:
can I use Strings in conditionExpressio like this:${transition == "siebel"} or should it be integer as in the example?

Thanks

Re: How can I get process variables in conditionExpression?

frederikherema1 — Wed, 30 Mar 2011 10:33:01 GMT

You can use string, thats no problem. Might have to do ${stringVar.equals('myValue')}, not sure what the UEL-spec says…

Re: How can I get process variables in conditionExpression?

mghb2009 — Tue, 16 Dec 2014 14:59:43 GMT

how get input value without service task?
${input == 3}

Re: How can I get process variables in conditionExpression?

sunilkumartk — Thu, 28 Apr 2016 11:56:24 GMT

I am doing my first wf in activiti 5.19 I have the following Exclusive gateway. I need to use a string compare in my expression.
But i am not able to make it work.
heres what i have in the gateway
<blockcode>
    <exclusiveGateway id="TechnicalApprovalStatusCheck" name="Technical Approval Status Check"></exclusiveGateway>
    <sequenceFlow id="techapproval" name="Technical Approved" sourceRef="TechnicalApprovalStatusCheck" targetRef="businessValidation"></sequenceFlow>
    <sequenceFlow id="techReject" name="Technical Rejection" sourceRef="TechnicalApprovalStatusCheck" targetRef="RequestToolCompleted">
    <sequenceFlow id="techOnhold" name="Technical On Hold" sourceRef="TechnicalApprovalStatusCheck" targetRef="technicalValidation">
      <conditionExpression xsi:type="tFormalExpression">${stageCount == 2}></conditionExpression>
    </sequenceFlow>
      <conditionExpression xsi:type="tFormalExpression">${state.equals('rejected')}</conditionExpression>
    </sequenceFlow>
</blockcode>

Irrespective what i try in the process variable use the execution takes me to the task 'businessValidation'.
What am i doing wrong ?

Re: How can I get process variables in conditionExpression?

martin_grofcik — Mon, 02 May 2016 06:25:55 GMT

Hi Sunil,

jUnit test would help (https://forums.activiti.org/content/sticky-how-write-unit-test), but I would say that the first sequence flow which is evaluated to the true is taken. (in your case businessValidation). Use default flow or condition.

Regards
Martin