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.