[rules-users] Agenda events in a Stateless session

[Mark Proctor]

David Boaz wrote:
> Your answer refered to Statefull session. My question was regarding a
> stateless session, that do not extend WorkingMemory.
>   
you are using an event, that event exposes the knowledgeruntime in the 
event listener - stateless and stateful use the same event model and 
both expose the knowledgeruntime as a parameter. All events should 
extend KnowledgeRuntimeEvent which provides the method getKnowledgeRuntime.

Mark
> Currently, I did an ugly work-around. The Activation returns a
> Collection<FactHandle>, and I noticed that in runtime, the FactHandle is
> instanceof InternalFactHandle, that do have a getObject(). So, My code looks
> like:
> for(FactHandle handle:activation.getFactHandles()){
>   assert(handle instanceof InternalFactHandle);
>   Object o=((InternalFactHandle)handle).getObject();
>   ...
> }
> Im looking for the correct way to implement this functionality. 
> Thanks, David
>
>
> Mark Proctor wrote:
>   
>> David Boaz wrote:
>>     
>>> Thanks Mark,
>>>
>>> The post bellow doesn't deal with the event listener registration.
>>> Assuming
>>> the registration was solved, now I have another issue. How to retrieve
>>> the
>>> Facts given Fact-handles? In a stateless session, I have no access to the
>>> working memory.
>>>   
>>>       
>> If you are using StatefulKnowledgeSession. Then the Activation has
>>     Collection< ? extends FactHandle> getFactHandles();
>>
>> And the KnowledgeRuntime is always available, which extends the 
>> WorkingMemory.
>>
>> Mkar
>>     
>>> David
>>>
>>>
>>> Mark Proctor wrote:
>>>   
>>>       
>>>> David Boaz wrote:
>>>>     
>>>>         
>>>>> Hi all,
>>>>>
>>>>> Im trying to listen to the events fired during the evaluation of a
>>>>> stateless
>>>>> session. I implemented org.drools.event.rule.AgendaEventListener. The
>>>>> events
>>>>> fire as expected. From the event I can extract the Activation, the Rule
>>>>> and
>>>>> the list of FactHandles. Now, from each FactHandle I want to retrieve
>>>>> the
>>>>> associated fact (Object). For that, I need a WorkingMemory. But the WM
>>>>> doesn't participate in the event signature. In addition, since Im using
>>>>> a
>>>>> stateless session, the working memory does not exist until I execute()
>>>>> method.
>>>>>
>>>>> Can you please help?
>>>>>   
>>>>>       
>>>>>           
>>>> The event listeners don't work in the last release, this is fixed in 
>>>> trunk, please give it a try in a snapshot:
>>>> https://hudson.jboss.org/hudson/job/drools/lastSuccessfulBuild/artifact/trunk/target/
>>>>     
>>>>         
>>>>> Thanks, David
>>>>>   
>>>>>       
>>>>>           
>>>> _______________________________________________
>>>> rules-users mailing list
>>>> rules-users at lists.jboss.org
>>>> https://lists.jboss.org/mailman/listinfo/rules-users
>>>>
>>>>
>>>>     
>>>>         
>>>   
>>>       
>> _______________________________________________
>> rules-users mailing list
>> rules-users at lists.jboss.org
>> https://lists.jboss.org/mailman/listinfo/rules-users
>>
>>
>>     
>
>   

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.jboss.org/pipermail/rules-users/attachments/20090306/901fe6f0/attachment.html