topic Re: Restart status for long tasks in Alfresco Archive

Restart status for long tasks

marcantoine — Fri, 17 Oct 2014 10:08:31 GMT

Hi,I have a long task to process, using an overload of the AbstractBpmnActivityBehavior class.I have implemented the execute() and signal() methods.And I'm based on Request/Acknowledge/Callback service design parttern [http://servicedesignpatterns.com/clientserviceinteractions/requestacknowledge]But

Re: Restart status for long tasks

jbarrez — Fri, 17 Oct 2014 10:12:46 GMT

Hmm, not fully clear what you are trying to achieve. You mention 'job', is that the Activiti meaning of job (ie an async execution of some step of the process?).

If Activiti is down … the transaction will have rolled back to the previous stable state.

Re: Restart status for long tasks

marcantoine — Fri, 17 Oct 2014 11:20:03 GMT

Sorry, for me the job is a long task executed in the web service.
I try to refomulate it:
When the Activiti server is down during the callback of the async web service, the task will not be completed. When we restart activiti, is it possible to ask at the web service to have the information about the status of the managed async job ?
Because the web service can't be informed about the restart of the Activiti service to re-send the callback.

Is it more clear ?

Re: Restart status for long tasks

jbarrez — Mon, 20 Oct 2014 08:55:10 GMT

So there are two things that can happen:

1. The engine goes down during the webservice call: if the engine shutdown down is graceful (engine.shutdown()), the async threadpool will finish nicely. If the engine crashes, the transaction will be rolled back to before the webservice call.

2. The call is async, but there is a callback (ie service task send + receive task wait state). At that point, when the engine crashed, the status could be fetched from the ExecutionQuery, quering executions of a given process instance that are in a certain activity (pass the activity id)

Re: Restart status for long tasks

marcantoine — Thu, 23 Oct 2014 12:09:10 GMT

Thanks for precisions.