Reference multiInstanceElementVar in activiti:in expression

chris_joelly — Sat, 29 Sep 2012 17:59:45 GMT

Hello,is it possible to reference the elementVariable of an multiInstanceLoopCharacteristics in an expression in activiti:in? <callActivity id="callDoSomething" name="doSomething" calledElement="doSomething" activiti:async="true"> <extensionElements> <activiti:in source

Re: Reference multiInstanceElementVar in activiti:in expression

kafeitu — Sun, 30 Sep 2012 06:35:38 GMT

Hello,

is it possible to reference the elementVariable of an multiInstanceLoopCharacteristics in an expression in activiti:in?

<callActivity id="callDoSomething" name="doSomething" calledElement="doSomething" activiti:async="true"> <extensionElements> <activiti:in source="listElem" target="something"></activiti:in> <activiti:in source="#{listElem.id}" target="businessKey"></activiti:in> </extensionElements> <multiInstanceLoopCharacteristics isSequential="false" activiti:collection="listSomething" activiti:elementVariable="listElem"></multiInstanceLoopCharacteristics> </callActivity>
I try to find an more or less non-intrusive way to define a "businessKey" as it is not possible to use the Activiti businessKey API due to the missing ability to set an business key after a process instance is started…

The feature is not support now, but you can use other ways.

Create a execution listener of type start on the process that id is callDoSomething.

Xml code:


<process id="doSomething">
    <extensionElements>
      <activiti:executionListener event="start" delegateExpression="${setBusinessKeyOnStartProcessInstance}"></activiti:executionListener>
    </extensionElements>
….
</process>

Java code:


@Service
@Transactional
public class SetBusinessKeyOnStartProcessInstance implements ExecutionListener {

    @Autowired
    FooManager fooManager;
  
    void notify(DelegateExecution execution) throws Exception {
       Object businessKey = execution.getVariable("businessKey");
      fooManager.updateBusinessKey(businessKey);
    }
}

Re: Reference multiInstanceElementVar in activiti:in expression

frederikherema1 — Mon, 01 Oct 2012 07:08:00 GMT

It is possible to reference the loop-variable inside an expression. The value of the loopItem is available on the execution so this is possible.

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Reference multiInstanceElementVar in activiti:in expression

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Re: Reference multiInstanceElementVar in activiti:in expression