A little explanation on the routing of the gateways

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d00d

Hi,

i have a simple demo process

<?xml version="1.0" encoding="UTF-8"?>
<definitions xmlns="http://www.omg.org/spec/BPMN/20100524/MODEL" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:activiti="http://activiti.org/bpmn" xmlns:bpmndi="http://www.omg.org/spec/BPMN/20100524/DI" xmlns:omgdc="http://www.omg.org/spec/DD/20100524/DC" xmlns:omgdi="http://www.omg.org/spec/DD/20100524/DI" typeLanguage="http://www.w3.org/2001/XMLSchema" expressionLanguage="http://www.w3.org/1999/XPath" targetNamespace="http://activiti.org/bpmn20" id="definitions">
  <process id="financialReport" name="Monthly financial report reminder process" isExecutable="true">
    <startEvent id="theStart">
      <extensionElements>
        <activiti:formProperty id="requestApproved" name="requestApproved" type="boolean" expression="TRUE" variable="TRUE" writable="false">
          <activiti:value id="requestApproved" name="TRUE"></activiti:value>
        </activiti:formProperty>
      </extensionElements>
    </startEvent>
    <userTask id="verifyReportTask" name="Process B" activiti:candidateGroups="management">
      <documentation>Verify monthly financial report composed by the accountancy department.
              This financial report is going to be sent to all the company shareholders.</documentation>
    </userTask>
    <endEvent id="theEnd"></endEvent>
    <userTask id="usertask1" name="Process A"></userTask>
    <exclusiveGateway id="exclusivegateway1" name="Exclusive Gateway"></exclusiveGateway>
    <sequenceFlow id="flow5" sourceRef="exclusivegateway1" targetRef="usertask1">
      <conditionExpression xsi:type="tFormalExpression"><![CDATA[${requestApproved == "true"}]]></conditionExpression>
    </sequenceFlow>
    <sequenceFlow id="flow6" sourceRef="exclusivegateway1" targetRef="verifyReportTask">
      <conditionExpression xsi:type="tFormalExpression"><![CDATA[${requestApproved == "false"}]]></conditionExpression>
    </sequenceFlow>
    <exclusiveGateway id="exclusivegateway2" name="Exclusive Gateway"></exclusiveGateway>
    <sequenceFlow id="flow7" sourceRef="usertask1" targetRef="exclusivegateway2"></sequenceFlow>
    <sequenceFlow id="flow8" sourceRef="verifyReportTask" targetRef="exclusivegateway2"></sequenceFlow>
    <sequenceFlow id="flow9" sourceRef="exclusivegateway2" targetRef="theEnd"></sequenceFlow>
    <sequenceFlow id="flow10" sourceRef="theStart" targetRef="exclusivegateway1"></sequenceFlow>
  </process>

</definitions>

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I am currently trying to route the process flow according on a local variable that i declared within the example.java code where the workflow is being executed (claim and execute tasks and so on). I declared a

boolean requestApproved = true;
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within my java class that i want to be checked for at the gateway and route the flow accordingly. But i get the following error message:

Exception in thread "main" org.activiti.engine.ActivitiException: Unknown property used in expression: ${requestApproved == "true"}
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What's wrong with my code? Any ideas?

martin_grofcik

Hi,
If I am right, variable name is variable="TRUE" instead of requestApproved.

http://www.activiti.org/userguide/#formProperties

Regards
Martin