topic Signalling parallel execution in service task in Alfresco Archive

Signalling parallel execution in service task

activator — Fri, 14 Mar 2014 16:47:42 GMT

Hi,we are currently trying to model two parallel executions where one execution signals the other to terminate. We have tried to use signals to trigger the termination:[IMG]http://i.imgur.com/WU3SV5o.png[/IMG]As signals are broadcasted to all executions in all running process instances, we use a ser

Re: Signalling parallel execution in service task

jbarrez — Mon, 17 Mar 2014 10:20:45 GMT

> As signals are broadcasted to all executions in all running process instances,

A signal has also an optional 'activiti:scope' property, which you can set to 'process instance' to not be broadcasted that wide. Did you try that?

Signal catching on service tasks is dodgy im afraid, as you can't kill java logic executing that easy.

Re: Signalling parallel execution in service task

activator — Tue, 18 Mar 2014 14:15:07 GMT

Hi jbarrez,

The property 'activiti:scope' sounds just like the feature we need!

However, I constructed a small test example very similar to my picture above with a signal throwing event instead of a service task. Executing the example still throws an exception:


…
Referential integrity constraint violation: "ACT_FK_TASK_EXE: PUBLIC.ACT_RU_TASK FOREIGN KEY(EXECUTION_ID_) REFERENCES PUBLIC.ACT_RU_EXECUTION(ID_) ('9')"; SQL statement:
delete from ACT_RU_EXECUTION where ID_ = ? and REV_ = ? [23503-168]
…

It seems that activiti tries to delete the execution of the upper parallel branch, however, the user task is not deleted first.

We use activiti v5.14. Are there known issues with the signal boundary event being used on a user task?

I can provide the unit test, if you like. How do I upload a file other than simple text file?

Re: Signalling parallel execution in service task

jbarrez — Mon, 24 Mar 2014 11:43:39 GMT

It's not a known issue for sure.

A unit test would be appreciated. You can always rename the file to have a .txt extension here 😉

Re: Signalling parallel execution in service task

activator — Tue, 25 Mar 2014 13:05:41 GMT

Attached the unit test built on top of the activiti-unit-test-template.

Thanks for your help!
Michael

Re: Signalling parallel execution in service task

jbarrez — Tue, 25 Mar 2014 19:41:27 GMT

Verified, indeed a bug.

Bugfix has been pushed: https://github.com/Activiti/Activiti/commit/0eeca1883e64b6218228d61b39bb45803ab75f54

It will be part of Activiti 5.15.1, which will be released later this week.