[rules-users] A basic doubt about Drools Fusion
Mauricio Salatino
salaboy at gmail.com
Fri Dec 7 10:27:44 EST 2012
There should be a listener for afterActivationCreated, right?
On Fri, Dec 7, 2012 at 3:16 PM, Esteban Aliverti <esteban.aliverti at gmail.com
> wrote:
> I think you have 2 main options here:
>
> - Invoke fireUnitlHalt() in an independent thread.
> - Invoke fireAllRules() after each insert() you have.
>
> Best Regards,
>
>
>
> XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
>
> Esteban Aliverti
> - Blog @ http://ilesteban.wordpress.com
>
>
>
> On Fri, Dec 7, 2012 at 3:57 PM, Adrián Paredes <
> adrianp at epidataconsulting.com> wrote:
>
>> Thank you, Esteban.
>>
>> You are right! If I insert two events A:
>>
>> rulesTest.addEventA("123");
>> rulesTest.addEventA("456");
>>
>> The second call of fireAllRules() activates the rule for the first object:
>>
>> Event inserted com.epidataconsulting.drools.model.EventA
>> Event A 123 at Fri Dec 07 11:54:21 ART 2012
>> Event inserted com.epidataconsulting.drools.model.EventA
>>
>> But not for the second.
>>
>> How I can do to correct this behavior?
>>
>> Thanks!
>>
>> Adrian
>>
>>
>> 2012/12/7 Esteban Aliverti <esteban.aliverti at gmail.com>
>>
>>> It could be the case, and I'm guessing here, that the
>>> AgendaEventListener is called just before the activation is placed into the
>>> agenda. So, the call to fireAllRules() finds an empty agenda. What you
>>> could do to check if this is what is happening, is to insert 2 EvenA
>>> objects. The second call of fireAllRules() should fire the activation of
>>> the first object (and you will miss the activation of the second).
>>>
>>> Best Regards,
>>>
>>>
>>>
>>>
>>> XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
>>>
>>> Esteban Aliverti
>>> - Blog @ http://ilesteban.wordpress.com
>>>
>>>
>>>
>>> On Fri, Dec 7, 2012 at 1:55 PM, Adrián Paredes <
>>> adrianp at epidataconsulting.com> wrote:
>>>
>>>> Hi all:
>>>>
>>>> I have a very basic doubt about Drools Fusion.
>>>>
>>>> I have two simple Java classes:
>>>>
>>>> EventA {
>>>> String id;
>>>> Date timestamp;
>>>> Long duration;
>>>> }
>>>>
>>>> EventB {
>>>> String id;
>>>> Date timestamp;
>>>> Long duration;
>>>> }
>>>>
>>>> I have a DRL file, where I declare this two classes as Events:
>>>>
>>>> declare EventA
>>>> @role(event)
>>>> @timestamp(timestamp)
>>>> @duration(duration)
>>>> end
>>>>
>>>> declare EventB
>>>> @role(event)
>>>> @timestamp(timestamp)
>>>> @duration(duration)
>>>> end
>>>>
>>>> I have a simple rule:
>>>>
>>>> rule "Basic Rule"
>>>> dialect 'mvel'
>>>> when
>>>> $eventA: EventA($aId: id) from entry-point "time stream"
>>>> then
>>>> System.out.println("Event A " + $aId + " at " + $eventA.timestamp);
>>>> end
>>>>
>>>> Finally, I have a test that starts a StatefulKnowledgeSession in STREAM
>>>> mode, register an eventLister in the session in order to fire the rules
>>>> when an event arrives:
>>>>
>>>> ksession.addEventListener(new DefaultAgendaEventListener() {
>>>> @Override
>>>> public void activationCreated(ActivationCreatedEvent event) {
>>>> ((StatefulKnowledgeSession)
>>>> event.getKnowledgeRuntime()).fireAllRules();
>>>> }
>>>> });
>>>>
>>>> And then the test insert in the "time stream" entry-point an instance
>>>> of EventA with duration of 10 miliseconds, as follows:
>>>>
>>>> EventA eventA = new EventA();
>>>> eventA.setId("123");
>>>> eventA.setTimestamp(new Date());
>>>> eventA.setDuration(10L);
>>>> ksession.getWorkingMemoryEntryPoint("time stream").insert(event);
>>>>
>>>> At the end of the test, I have an sleep of 2 seconds just in case.
>>>>
>>>> I don't understand why the "Basic Rule" never fires.
>>>>
>>>> But if I add another condition to the same rule, something like this:
>>>>
>>>> rule "Basic Rule"
>>>> dialect 'mvel'
>>>> when
>>>> $eventA: EventA($aId: id) from entry-point "time stream"
>>>> not EventB($aId == id, this after [0s,5s] $eventA) from entry-point
>>>> "time stream"
>>>> then
>>>> System.out.println("Event A " + $aId + " at " + $eventA.timestamp);
>>>> end
>>>>
>>>> The rules fires and I see this message in console:
>>>>
>>>> Event A 123 at Fri Dec 07 09:48:59 ART 2012
>>>>
>>>> I don't understand why the first rule, that is more open, don't fire,
>>>> and the second rule, that is more restrictive, fires without problems.
>>>>
>>>> Thank you very much!
>>>>
>>>> Greetings,
>>>> Adrian.
>>>>
>>>> --
>>>> *Epidata Consulting | Deploying Ideas
>>>> Ing. Adrián M. Paredes | Arquitecto Desarrollador
>>>> adrianp at epidataconsulting.com | Cel: (54911) 3297 1713
>>>>
>>>> ----------------------------------------------------------------------------------------------------------------------------
>>>> Argentina: Maipú 521 Piso 1 Of. A | Buenos Aires | Of: (5411) 5031 0060
>>>> Chile: Apoquindo 3600 Piso 7 y 9 | Las Condes - Santiago | Of: (+56) 2
>>>> 495 8450
>>>>
>>>> ---------------------------------------------------------------------------------------------------------------------------
>>>> www.epidataconsulting.com
>>>> Linkedin <http://bit.ly/epidatalinkedin> | Facebook<http://www.facebook.com/epidata.consulting>
>>>> | Twitter <http://twitter.com/epidata>
>>>> *
>>>>
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>>>>
>>>>
>>>
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>>
>>
>> --
>> *Epidata Consulting | Deploying Ideas
>> Ing. Adrián M. Paredes | Arquitecto Desarrollador
>> adrianp at epidataconsulting.com | Cel: (54911) 3297 1713
>>
>> ----------------------------------------------------------------------------------------------------------------------------
>> Argentina: Maipú 521 Piso 1 Of. A | Buenos Aires | Of: (5411) 5031 0060
>> Chile: Apoquindo 3600 Piso 7 y 9 | Las Condes - Santiago | Of: (+56) 2
>> 495 8450
>>
>> ---------------------------------------------------------------------------------------------------------------------------
>> www.epidataconsulting.com
>> Linkedin <http://bit.ly/epidatalinkedin> | Facebook<http://www.facebook.com/epidata.consulting>
>> | Twitter <http://twitter.com/epidata>
>> *
>>
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>>
>
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- Salatino "Salaboy" Mauricio -
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