JBPM5 Setting process variables at startup

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This tutorial has been written for an old version of jBPM which is now deprecated.

If you want to get started quickly with jBPM, we recommend the following quickstarts:

You can provide input parameters to your process much the same way you did with jBPM3.

For example, here’s how to set the initial value for the “money” process variable:

KnowledgeBase kbase = readKnowledgeBase();
StatefulKnowledgeSession ksession =

        kbase.newStatefulKnowledgeSession();
        
Map<String, Object> inputParams =

         new HashMap<String, Object>();
inputParams.put("money", new Long(15));
        
// start a new process instance
ProcessInstance process =

         ksession.startProcess("com.sample.bpmn.task",inputParams);

Remember, that process variables need to be defined into your BPMN 2.0 process file. In this example:

<itemDefinition id="_moneyItem" structureRef="Integer" />

  <process processType="Private" isExecutable="true" id="com.sample.bpmn.task" name="Sample Task" >

    <!-- process variables -->
    <property id="money" itemSubjectRef="_moneyItem"/>

    . . . . .

  </process>

Hint: if you are using Eclipse jBPM plugin, then you can define a variable by simply pointing to any place on your BPMN 2.0 diagram (where there are no nodes) and in the “Properties” Tab insert your variable:

jbpm5 process variables