topic Global variables of multi-instance and callActivity? in Alfresco Archive

Global variables of multi-instance and callActivity?

ryu — Sun, 22 May 2011 16:56:33 GMT

activitiut in a callActivity allows the possibility to write a result from a subprocess back to its parent process.However, activitiut does not work in a multi-instance of callActivity, which means there are no ways to write the result back to the main process when you are in a loop.I think it i

Re: Global variables of multi-instance and callActivity?

jbarrez — Tue, 24 May 2011 08:06:27 GMT

The simplest solution imo would be to allow for expressions in the activitiut, allowing to write variables like activitiut="myVar-${loopCounter}". Would that cover your use case?

Re: Global variables of multi-instance and callActivity?

ryu — Tue, 24 May 2011 09:31:29 GMT

I'm very glad that you replied to this topic.
Your suggestion is to write variable from every sub process to different variables of the main process. It's a good idea,. But sadly, the problem is, the element activitiut does not work. activitiut does not write any thing when being used in a multi-instance, even a value like this:


        <activiti:smileysurprised:ut sourceExpression="${&quot;HelloWorld&quot:smileywink:}" target="i"></activiti:smileysurprised:ut>

i is the variable of the main process. If it works, it doesn't matter how many times i is overwritten, we should have "HelloWorld" in i in the end. But not.

So when I looked back in the source code of MultiInstanceActivityBehavior, seems like there are no functions to set variables to its parent process when a sub process "leave"

Re: Global variables of multi-instance and callActivity?

jbarrez — Wed, 25 May 2011 10:01:25 GMT

Then that is indeed a but. Could you create a jira issue for it so we can track it?

Re: Global variables of multi-instance and callActivity?

ryu — Wed, 25 May 2011 10:14:16 GMT

yes Jira: http://jira.codehaus.org/browse/ACT-825

thank you

Re: Global variables of multi-instance and callActivity?

chockyc91 — Sat, 28 Nov 2015 13:40:30 GMT

Can anyone suggest solution for this issue. I am unable to access the output parameter from callActivity in Multi instance loop.
I want to create parallel tasks dynamically using callActivity and if any one of the tasks is Rejected, I want to complete all the tasks and instance.

Re: Global variables of multi-instance and callActivity?

maheshramani — Mon, 27 Feb 2017 15:38:08 GMT

Late reply but might be useful for someone else....

One way of dealing with it would be to write a delegate or script to do the following...

execution below is from the subprocess

superExecutionId = execution.getSuperExecutionId();
runtimeService.setVariable(superExecutionId, someVariableName, someValue);