[rules-users] Drools Flow 5.1.0.M1 - Pooling of WSHumanTaskHandler and MinaTaskClient - IoSession

[Vijay K Pandey]

Thanks Kris. I did saw the connect method and saw that it only creates a new connection if the client is null, but my question was more at the level of "session" (StatefulKnowledgeSession) and MinaTaskClient creation.



        StatefulKnowledgeSession ksession = JPAKnowledgeService.newStatefulKnowledgeSession( kbase, null, env );

        ksession.getWorkItemManager().registerWorkItemHandler("Human Task", new WSHumanTaskHandler());



So with each StatefulKnowledgeSession - we will have a new "connect". I think pooling the WSHumanTaskHandler would not make any sense bcoz the executeWorkItem method registers the MinaTaskClient with the MinaTaskServer for several events.



Now another main component for us is the MinaTaskClient where we will be performing lots of operation where we won't register for any events. In that case I think we can pool the MinaTaskClient - may be even 1 MinaTaskClient can work for all the non registered client operations - as MINA IoSession is thread safe, need to make sure the IoFilter to be thread safe - but to be on better side we can pool MinaTaskClient.



I hope I am making some sense? Do let me know your recommendation.



Thanks

Vijay



-----Original Message-----
From: rules-users-bounces at lists.jboss.org [mailto:rules-users-bounces at lists.jboss.org] On Behalf Of Kris Verlaenen
Sent: Sunday, November 15, 2009 1:47 PM
To: Rules Users List; Vijay K Pandey
Subject: Re: [rules-users] Drools Flow 5.1.0.M1 - Pooling of WSHumanTaskHandler and MinaTaskClient - IoSession



One WSHumanTaskHandler should cache the client, so that it does not

recreate a new connection every time.  Note that, in the connect()

method, you only create a new connection if the client is null.



Kris



Quoting Vijay K Pandey <VPandey at mdes.ms.gov>:



> Hi,

>

> We have a web based application that currently deals with MQ Workflow

> for all the WSHT related processes/tasks. We are in the process of

> migrating to Drools Flow. In our current scenario we pool MQ workflow

> session (through apache commons pooling) - and our hundreds of web

> users use these sessions to get their word done (like starting a new

> process, retrieving a task, complete/forwarding/terminating tasks

> etc) - what we have seen is that in an 8hr window we have around

> 20,000 calls to mq workflow (around 42 calls/minute) - and it scales

> pretty good with mq workflow session pooling in place.

>

> Should I go ahead and extend WSHumanTaskHandler and MinaTaskClient so

> that they don't go through "connect" on every operation and get the

> MINA IoSession from some pool - as it might consume quite a bit of

> resources/time consuming to have a separate physical connections for

> each operation.

>

> Looking forward for your recommendations.

>

> Thanks

> Vijay

>









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