[rules-users] Drools 5.1 Flow in a "Clustered" environment

[Kris Verlaenen]

It related to this issue:
https://jira.jboss.org/browse/JBRULES-2616

Diego, is there something publicly available already?

Kris

Ken Young wrote:
> Thank you for the reply.  I a not sure where the community effort lives, but would it be possible send a link in order to take a look?
>
>
>
> Ken
> On Oct 28, 2010, at 8:28 PM, Kris Verlaenen wrote:
>
>   
>> Ken,
>>
>> In Drools, timers etc. are linked to a session (where the session can 
>> contain process instances, timers, data, rule evaluations, etc.). So, 
>> even if you are using Drools Flow in a clustered environment, where you 
>> could have a number of independent sessions running simultaneously, the 
>> timer will always be associated to that session. There are two possible 
>> strategies then: either (1) you keep the session online for ever (your 
>> cluster has a number of running sessions and you're possibly using 
>> persistence to restore in case of system failure), and the timers will 
>> fire in that session only when the time is right or (2) you only keep 
>> your session alive when it is necessary so sessions can go offline, 
>> where you could then use a scheduler to make sure the session is brought 
>> back online (from persistent storage) whenever a timer should fire in an 
>> offline session. The latter is currently being implemented as a 
>> community contribution.
>>
>> Kris
>>
>> Ken Young wrote:
>>     
>>> We are looking at embedding Drools 5.1 (specifically Drools Flow) in our application, but I am coming up short on determining how to configure clustering, or the support.  
>>>
>>> Specifically, I want to ensure that background processes that are taking place (reminders, timers, etc.) only happen once on a cluster.  Does drools support this and how?  
>>>
>>> In other software that we have clustered (Quartz for example), where a shared database lock is used to ensure the the processing happens in one place.  I was wondering if Drools 5.1 worked in a similar fashion.
>>>
>>> Thanks
>>> Ken
>>>
>>>
>>> _______________________________________________
>>> rules-users mailing list
>>> rules-users at lists.jboss.org
>>> https://lists.jboss.org/mailman/listinfo/rules-users
>>>
>>>       
>
>
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