topic getting null value for variable from Delegate Execution in Alfresco Archive

getting null value for variable from Delegate Execution

maulee17 — Tue, 31 Jul 2012 12:01:15 GMT

Hi,In the activiti workflow,I have one sub process. This sub process has a service task. Service task has a java class as a delegate and it implements JavaDelegate.when I do execution.getVariable("myvariable"), It returns null. Here when I debug the execution,it displays like concurrentExecution[123

Re: getting null value for variable from Delegate Execution

frederikherema1 — Tue, 31 Jul 2012 12:08:07 GMT

The scope-execution for a sub-process is created, having as parent, the execution that created the subprocess. in your case, this is a ConcurrentExecution. A concurrentExecution is used when, e.g. a parallel gateway created 2 separate paths of execution.

In normal cases, if a variable is not present on the child-execution, it asks it's parent-execution if the variable is available, and so on until the root of the execution-tree has been reached. However, when dealing with call-activities, the parent execution (which created the child-execution) isn't exposed. use the activiti:in and activitiut declarations for this (to get variables in and out of subprocess-scope), see user guide.

Re: getting null value for variable from Delegate Execution

maulee17 — Tue, 31 Jul 2012 13:39:52 GMT

Thanks frederikheremans for quick explanation.

But I am using an embedded sub process. In this case both the process context are shared. right ?

Also If I am not wrong activiti:in and activitiut I can use with call activity only.