Cannot accomplish a very simple correlation

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ejyanezp

Hi, I am trying to make a simple correlation tutorial, it is very simple but i cannot make it work.

The process is as follows (only the semantic part):

<definitions … …>
&nbsp; <message id="correlation" name="Correlation"></message>
&nbsp; <process id="myProcessCorrelation" name="My process Correlation" isExecutable="true">
&nbsp;&nbsp;&nbsp; <startEvent id="startevent1" name="Start"></startEvent>
&nbsp;&nbsp;&nbsp; <scriptTask id="scripttask1" name="Print before" scriptFormat="groovy" activiti:autoStoreVariables="false">
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <script>println "Before"</script>
&nbsp;&nbsp;&nbsp; </scriptTask>
&nbsp;&nbsp;&nbsp; <sequenceFlow id="flow1" sourceRef="startevent1" targetRef="scripttask1"></sequenceFlow>
&nbsp;&nbsp;&nbsp; <intermediateCatchEvent id="messageintermediatecatchevent1" name="MessageCatchEvent">
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <messageEventDefinition messageRef="correlation"/>
&nbsp;&nbsp;&nbsp; </intermediateCatchEvent>
&nbsp;&nbsp;&nbsp; <sequenceFlow id="flow2" sourceRef="scripttask1" targetRef="messageintermediatecatchevent1"></sequenceFlow>
&nbsp;&nbsp;&nbsp; <sequenceFlow id="flow3" sourceRef="messageintermediatecatchevent1" targetRef="scripttask2"></sequenceFlow>
&nbsp;&nbsp;&nbsp; <scriptTask id="scripttask2" name="Print After" scriptFormat="groovy" activiti:autoStoreVariables="false">
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <script>println "After"</script>
&nbsp;&nbsp;&nbsp; </scriptTask>
&nbsp;&nbsp;&nbsp; <endEvent id="endevent1" name="End"></endEvent>
&nbsp;&nbsp;&nbsp; <sequenceFlow id="flow4" sourceRef="scripttask2" targetRef="endevent1"></sequenceFlow>
&nbsp; </process>
</definitions>
‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

And the JUnit code (only the segment that matters):

RuntimeService runtimeService = activitiRule.getRuntimeService();
Map<String, Object> variableMap = new HashMap<String, Object>();
variableMap.put("name", "Activiti");
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
ProcessInstance processInstance = runtimeService.startProcessInstanceByKey("myProcessCorrelation", variableMap);
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Execution execution = runtimeService.createExecutionQuery()
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; .messageEventSubscriptionName("Correlation")
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; .variableValueEquals("name", "Activiti")
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; .singleResult();
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
runtimeService.messageEventReceived("Correlation", execution.getId());&nbsp; // <– execution is null, why??!?!?!?
‍‍‍‍‍‍‍‍‍‍‍‍‍‍

The problem is that null is assigned to the execution variable. I don't know why

You can download the eclipse project from this link

Any help?

Regards.
Eduardo Yánez.

jbarrez

Did you check if you have got a mesage with that id/name in your database? Did you try using the id instead of the name?