[rules-users] Cron Rule doesn't work

[Wolfgang Laun]

Experiments (5.[2345].0) show that it's not necessary to use
fireUntilHalt. A rule like

rule "Rule 123"
timer (cron: 0/15 * * * * ?)
when
then
  System.out.println("Fired 123!");
end

keeps the timer task alive even when the stateful session isn't
evaluating rules. Just don't dispose() the session.

@Mark: Not executing a due timer when a session is idle would be a
bug, or at least a very severe restriction on the way you run a
session with timers. Not everybody is happy with a session continually
alive with fireUntilHalt.

-W

On 20/06/2013, Mark Proctor <mproctor at codehaus.org> wrote:
> try fireUntilHalt, or it won't be able to fire the events as they happen.
>
> Mark
> On 20 Jun 2013, at 02:04, Andy <reliable.android at gmail.com> wrote:
>
>> *Issue 1*
>>
>> Steps:
>> 1. Add a Rule with cron + when condition always true.
>> 2. FireAllRules
>>
>> Expected: Cron to fire every 15 seconds
>>
>> Rule:
>> "
>> rule "Rule 123" dialect "mvel"
>> timer (cron:0/15 * * * * ?)
>> when
>>  eval(true)
>> then
>>  System.out.println("Fired!");
>> end
>> "
>>
>> Other Details:
>> "
>>    ...(initialized kagent using changeset)
>> 		kbase = kagent.getKnowledgeBase();
>> 		ksession = kbase.newStatefulKnowledgeSession();
>> 		ksession.fireAllRules();
>> "
>>
>> The same rule works fine when I insert some object.
>>
>> *Issue 2*
>> Inserting some object and then adding a second cron makes the previous
>> cron
>> fire twice, then thrice and so on...
>>
>> Is statefulknowledge session right choice for me?
>> Are there any known issues with cron rules?
>>
>> Any help/advice is appreciated. Thx!
>>
>>
>>
>> --
>> View this message in context:
>> http://drools.46999.n3.nabble.com/Cron-Rule-doesn-t-work-tp4024399.html
>> Sent from the Drools: User forum mailing list archive at Nabble.com.
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>> rules-users at lists.jboss.org
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>
>
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