[rules-users] Persistence and mina human task handling

[Mark Proctor]

Can you open a JIRA for this, and we'll make sure it's done in the next 
few weeks:
https://jira.jboss.org/jira/browse/JBRULES

thanks

Mark
Balázs Molnár wrote:
> Hello,
>
> I tried to setup a sample standalone "hello" application that attempts 
> to run a process involving human tasks. 
> Main components were:
> - mina  task  server (as documentation hinted, based on a sample),
> - standalone "hello sort of" application running a ruleflow with some 
> workitems including a human task too,
> - eclipse human task view.
>
> I setup the persistence - following the documentation, asked for a jta 
> datasource and used bitronix transaction manager.
>
> The application:
> - begins a new user transaction
> - creates a new process instance in a stateful session
> - calls fireallrules
> - waits on the console with System.in.read() (this was already a 
> workaround to avoid completing the user transaction before the human 
> task is handled in the HT view, this otherwise caused a nullpointer 
> assigment at line 83 in JPAWorkItemManager which tried to refer to 
> variable "em" which when set returned null for the following 
> assignment if  usertransaction were committed: 
> EntityManager em = (EntityManager) 
> this.workingMemory.getEnvironment().get( 
> EnvironmentName.ENTITY_MANAGER );)
>
> ... following the above the message reaches the human task server, and 
> then the task appears in the human task view - so far so good.
>
> Then when the task is started and completed in the view, the 
> "GetCompletedTaskResponseHandler.execute()" begins handling the 
> completed message. Unfortunately this call fails with :
> " no transaction started on this thread"
>
> I have then checked the threads in the debug view and looked like the 
> message response is actually running in the "NioProcessor" thread. At 
> this point I got stuck.  If there is some guideance on  how to 
> correctly setup transaction management and Mina task client/human task 
> work item handler it would be very much appreciated.
>
> thank you.
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