12:25 a.m.
Alright... two more:
1. If a process suspends, do timers keep running/firing?
2. Let's say I have workItem_1 --> workItem_2 --> workItem_3 of which
"workItem_1" suspends the flow and "workItem_3" has a timer. After
reloading
the StatefulKnowledgeSession and completing "workItem_1" and moving on do I
need to restart the timer for "workItem_3"?
I would like to mention some inconsistent behavior I have experienced:
- ksession.fireUntilHalt() is not starting the timers, instead
ksession.fireAllRules() DOES.
- ksession.halt() does not stop the timers (if that is the way I'm supposed
to stop them)
Any tips or personal experience will be very appreciated.
Thanks,
Nick.
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4:44 p.m.
Thanks a lot for sharing the hint about ksession.fireAllRules()!
ksession.fireUntilHalt() does not work with me either... nor does
ksession.halt()
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5:47 p.m.
Hi retoy,
Thanks for your comment ;)
Just wanted to mention that halt() should not be used to stop a timer. A
timer should stop once the flow execution moves away from it to the next
node. ksession.halt() might halt other things running on the session and not
only the timer.
Nick.
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11:25 a.m.
Hi Nick
Alright, this makes sense, thanks. :)
By the way: Since I've only made some tests with an in memory DB until now:
Do you have any idea what happens with timers if a process instance is
persisted and the app that executes it terminates (maybe abnormally). Do the
timers of the persisted process instances just restart firing automatically
as soon as the app restarts and opens a new session (or after fireAllRules()
was called resp.)? Or do persisted processes have to be triggered
explicitely to resume?
Reto
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3:33 p.m.
Hi retov,
Given that the timers do not work when using persistence I haven't been able
to test the scenario you described. I did test timer behavior when an
exception is thrown from within the workItemHandler that has a timer
attached to it. And in this case the timer keeps working, that is, it does
not stop if you exit workItemHandler abnormally. But remember, this is
without persistence enabled.
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4:24 p.m.
I probably missed quite a few emails on the mailing list lately (sorry), but
what's the exact problem with timers and persistence (and does it still
exist in the latest trunk, as I know various improvements / bug fixes have
been applied in the last few weeks as well)?
There's a simple test that shows the use of timers and persistence together:
testPersistenceTimer() in
http://anonsvn.jboss.org/repos/labs/labs/jbossrules/trunk/drools-persiste...
If you are having issues, please let me know (and if possible provide a test
case like the one above that shows this behaviour ;)) and I'll take a look.
Kris
----- Original Message -----
From: "nanic23" <nanic23(a)hotmail.com>
To: <rules-users(a)lists.jboss.org>
Sent: Wednesday, July 21, 2010 3:33 PM
Subject: Re: [rules-users] Timers' Week :)
Hi retov,
Given that the timers do not work when using persistence I haven't been
able
to test the scenario you described. I did test timer behavior when an
exception is thrown from within the workItemHandler that has a timer
attached to it. And in this case the timer keeps working, that is, it does
not stop if you exit workItemHandler abnormally. But remember, this is
without persistence enabled.
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12:58 a.m.
Hi Kris,
Thanks for the post! I believe this thread was created before the fixes came
in. I have not had the chance to test the latest code yet. I will look at
the test case you mention and will bring in the trunk and run my tests. I'll
update the thread after I run my stuff :)
Thanks,
Nick
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9 p.m.
Hi Nick and Kris,
I tested with latest codes from trunk, both Nick's test (Timer with
ksession.fireUntilHalt()) and
PersistentStatefulSessionTest.testPersistenceTimer() are working now
(i.e "Timer Triggered" was printed).
Thanks and best regards,
Hui Onn
On Thu, Jul 22, 2010 at 6:58 AM, nanic23 <nanic23(a)hotmail.com> wrote:
Hi Kris,
Thanks for the post! I believe this thread was created before the fixes came
in. I have not had the chance to test the latest code yet. I will look at
the test case you mention and will bring in the trunk and run my tests. I'll
update the thread after I run my stuff :)
Thanks,
Nick
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4:35 p.m.
Hi cafebabe,
Thanks for the update. I'm trying my tests and I am not being able to get
timer running using persistence.
I create the session this way:
ksession = JPAKnowledgeService.newStatefulKnowledgeSession(kbase, null,
env);
I know all configuration is correct and persistence as its own is working
fine (i.e. I can suspend, resume flows, and complete work items without
problems) but timer is not being triggered when I call
ksession.fireUntilHalt() and the session was created with
JPAKnowledgeService class.
I am using the latest code from trunk as of yesterday July 26th.
Do you mind ziping up your example and uploading it here.
Thanks,
Nick.
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11:54 a.m.
Hi Nick,
Attached is the test files.
The console showed:
**** Timer thread started ****
**** Timer Triggered ****
**** Timer Triggered ****
**** Timer Triggered ****
**** Timer Triggered ****
**** Timer Triggered ****
**** Timer Triggered ****
**** Timer Triggered ****
**** Timer Triggered ****
**** Timer Triggered ****
**** Timer Triggered ****
before executing shouldResumeFlowAndComplete()
Best regards,
Hui Onn
On Tue, Jul 27, 2010 at 10:35 PM, nanic23 <nanic23(a)hotmail.com> wrote:
Hi cafebabe,
Thanks for the update. I'm trying my tests and I am not being able to get
timer running using persistence.
I create the session this way:
ksession = JPAKnowledgeService.newStatefulKnowledgeSession(kbase, null,
env);
I know all configuration is correct and persistence as its own is working
fine (i.e. I can suspend, resume flows, and complete work items without
problems) but timer is not being triggered when I call
ksession.fireUntilHalt() and the session was created with
JPAKnowledgeService class.
I am using the latest code from trunk as of yesterday July 26th.
Do you mind ziping up your example and uploading it here.
Thanks,
Nick.
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participants (4)
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Tan Hui Onn