[rules-users] agenda-groups

[gboro54]

Perhaps a blocking queue which has facts put on from other threads, the
thread then inserts x number of facts and fires the rule set?


gboro54 wrote
> 
> The point is to be able to stream a large volume of messages into the rule
> session without tying up that thread. In addition I don't want there to be
> millions of messages in a session at a given point, thus the point of
> executing the rules on a different thread while inserting facts from
> another. 
> 
> 
> laune wrote
>> 
>> What about executing insert(s) followed by fireAllRules() in one thread?
>> -W
>> 
>> On 08/05/2012, gboro54 <gboro54@> wrote:
>>> What do you recommend?  firUntilHalt seems to get locked out after
>>> sometime... I am running out of ideas and have posted this question
>>> before.
>>> I believe we talked about periodically using fireAllRules on a separate
>>> thread.
>>>
>>>
>>> laune wrote
>>>>
>>>> Periodically calling fireAllRules() in a thread running parallel to the
>>>> one(s)
>>>> doing insertions doesn't make sense to me.
>>>>
>>>> -W
>>>>
>>>> On 08/05/2012, gboro54 <gboro54@> wrote:
>>>>> I am not currently using agenda-groups. I believe my issue right now
>>>>> is
>>>>> one
>>>>> of thread safety. A little background: I currently have a thread
>>>>> pulling
>>>>> messages from a database running on the main thread. In several other
>>>>> threads, I have drools session being fired every so often. It appears
>>>>> that
>>>>> there may be a some type of deadlock caused by invoking fireAllRules
>>>>> on
>>>>> one
>>>>> thread, while another is trying to insert. I am working through right
>>>>> now
>>>>> to
>>>>> debug the issue. Has anyone else experienced this issue?
>>>>>
>>>>>
>>>>> Vincent Legendre wrote
>>>>>>
>>>>>>> I am having an issue where I have a catch all
>>>>>>> retraction rule setup as the lowest salience.
>>>>>>
>>>>>> Not sure to understand that (note that I am not english native ...)
>>>>>>
>>>>>>> I see activations created for the facts but they are never fired. 
>>>>>>> Any
>>>>>>> thoughts on why this may happen?
>>>>>>
>>>>>> Send some rules. Activations never fired is just too vague to have a
>>>>>> single answer.
>>>>>> If you use agenda groups, may be that the group is simply not on
>>>>>> focus
>>>>>> ...
>>>>>>
>>>>>> Add a first rule that set the focus, or set auto-focus for all your
>>>>>> "low
>>>>>> salience" rules, or don't set agenda group for them (their group will
>>>>>> be
>>>>>> the MAIN group).
>>>>>>
>>>>>>> The session is run on a separate thread with fireAllRules called
>>>>>>> every
>>>>>>> 1/2
>>>>>>> second. I have tried syncronizing inserts on the session so that
>>>>>>> thread
>>>>>>> would not be in the middle of firing when new facts come in but that
>>>>>>> does
>>>>>>> not seem to do anything....
>>>>>>
>>>>>> Why not using fireUntilHalt instead ?
>>>>>> Run your session.fireUntilHalt in a separate thread, and insert
>>>>>> things
>>>>>> in
>>>>>> that session.
>>>>>> insert (or update or retract) will wake up the session.
>>>>>>
>>>>>> Of course, one day, you have to call halt() on your session to get
>>>>>> out.
>>>>>> _______________________________________________
>>>>>> rules-users mailing list
>>>>>> rules-users at .jboss
>>>>>> https://lists.jboss.org/mailman/listinfo/rules-users
>>>>>>
>>>>>
>>>>>
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> 


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