'multi-instance' does not work

[othmann]

Hi,

  I'm trying to have a mail task repeated several times, in order to send many mails in a loop.

  Here is the BPMN task description :

    <serviceTask id="mailtask1" name="Mail" activiti:type="mail">
      <extensionElements>
        <activiti:field name="to" expression="${invites[loopCounter]}"></activiti:field>
        <activiti:field name="from" expression="xxxxxxxxxxxxxxx"></activiti:field>
        <activiti:field name="subject" expression="XXXXXXXXXXXXXXXX"></activiti:field>
        <activiti:field name="html">
          <activiti:expression><![CDATA[
                    XXXXXXX 
           !]]></activiti:expression>
        </activiti:field>
      </extensionElements>
      <multiInstanceLoopCharacteristics isSequential="false">
        <loopCardinality>5</loopCardinality>
    </multiInstanceLoopCharacteristics>
    </serviceTask>‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

  In this case, the "loopCounter" variable seems not to be known :

Caused by: org.activiti.engine.impl.javax.el.PropertyNotFoundException: Cannot resolve identifier 'loopCounter'

  I've tried the "collection" and "elementVariable" way of doing (which is in fact what I really need), but the variable I chose as "elementVariable" is not known either as a local variable in the process.

   Any help about this would be really appreciated.

  Othman

  PS : It is also very annoying that the Eclipse Designer removes the "multiInstanceLoopCharacteristics" node when we update the process diagram visually. This, however, seems normal.

[othmann]

Yes, The previous test works now with the trunk code. Thanks !

However, the mail task still ignores any "multiInstanceLoopCharacteristics" node. For example, if we try this process as a test :

<process id="testMultiMailProcess" name="Processus de test">
    <startEvent id="startevent1" name="Start"></startEvent>
    <serviceTask id="servicetask1" name="Service Task" activiti:type="mail">
     <extensionElements>
        <activiti:field name="to" expression="xxxxxx@xxxx.com"></activiti:field>
        <activiti:field name="from" expression="xxxxxx@xxxx.com"></activiti:field>
        <activiti:field name="subject" expression="Subject"></activiti:field>
        <activiti:field name="html">
          <activiti:expression><![CDATA[Hello !]]></activiti:expression>
        </activiti:field>
      </extensionElements>
    <multiInstanceLoopCharacteristics isSequential="false">
      <loopCardinality>5</loopCardinality>
    </multiInstanceLoopCharacteristics>
    </serviceTask>
    <sequenceFlow id="flow2" name="" sourceRef="startevent1" targetRef="servicetask1"></sequenceFlow>
    <endEvent id="endevent1" name="End"></endEvent>
    <sequenceFlow id="flow3" name="" sourceRef="servicetask1" targetRef="endevent1"></sequenceFlow>
  </process>
We only receive one mail. Why ? Isn't it in fact a delegate serviceTask ?

[othmann]

Ok, I tried anything to make it work with no success. I added a comment on the JIRA issue about this : http://jira.codehaus.org/browse/ACT-764

[jbarrez]

I had it fixed a while ago, but forgot to commit it. I've done that yesterday evening.

Could you recheck? Oh yeah, thanks fot the ping 😉

[bozon]

Does the issue http://jira.codehaus.org/browse/ACT-764 fix any kind of loops for service task including loop over collection elements with 'loopDataInputRef' and 'inputDataItem'?

[jbarrez]

It sure fixes the looping, which didnt work at all before the bugfix 🙂

What problem are you referring to ?

[bozon]

It sure fixes the looping, which didnt work at all before the bugfix 🙂

What problem are you referring to ?

I'd like to iterate over collection of elements for java class attached to service task would be called for each element of the collection. There are 3 types of loops: by loops count, by condition and by list iteration. Does that issue fix all them and iteration over collection will work in 5.5 release?

[jbarrez]

Yes - it should. I added some tests to verify and they all succeed.