'Process Instance Variable' and 'Task Local Variable'

[lojian]

Does anyone how the differences between "Process Instance Variable" and "Task Local Variable"?

[frederikherema1]

Task variables are only available within the task itself. Once the task is complete, they are gone (although present in history if configured to historyLevel FULL).

Setting process variables from API:

runtimeService.setVariable(processInstance.getId(), "varName", "value");

Setting task variables from API:

taskService.setVariableLocal(task.getId(), "varName", "value");


[lojian]

Got it! Thanks a lot!

I suggest write these concept into documentation. 🙂 Maybe I could help.

[pgrec]

Hi. Are Local variables accessible in Forms (e.g. as temporary variable which will be created on create task, or processed on exit task )? I miss this feature.

[jbarrez]

You should take a look at 'form properties', that's exactly what you probably need http://activiti.org/userguide/index.html#formProperties

[jorell]

How would we specify task local variables in the bpmn? I read somewhere else on this forum that io specs are not supported, is that true?

[frederikherema1]

If you want task-local variables, use a taskListener (create) to get access to the DelegateTask, which supports setVariableLocal()…

[santoshkumar]

How do I get ProcessInstance Variable in expression

[tgebeyehu]

${myVar}