[rules-users] rules-users Digest, Vol 72, Issue 55

[Gurvinder Narula1]

Hi Mattias,


Thanks for the clarification. Appreciate the quick response.

Gurvinder



On 11/27/12 12:00 PM, "rules-users-request at lists.jboss.org"
<rules-users-request at lists.jboss.org> wrote:

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>Today's Topics:
>
>   1. Drools response time (elMateo)
>   2. Re: Drools response time (Mauricio Salatino)
>   3. Re: Drools response time (Luk?? Petrovick?)
>   4. Re: Drools response time (elMateo)
>   5. Re: Question about drools-spring in a multi-treaded container
>      (like tomcat). (Mattias Nilsson Grip)
>   6. Re: Inserting Different Objects Of Same Class ! (Greg Barton)
>
>
>----------------------------------------------------------------------
>
>Message: 1
>Date: Tue, 27 Nov 2012 16:06:58 +0100
>From: elMateo <soyelmateo at gmail.com>
>Subject: [rules-users] Drools response time
>To: Rules Users List <rules-users at lists.jboss.org>
>Message-ID:
>       <CAKx6_9aEY2GEYoY0LmWUcW2DyyPYmX_sAAFr=Ou_u4dxuB4jmQ at mail.gmail.com>
>Content-Type: text/plain; charset="iso-8859-1"
>
>Dear all,
>
>I need to develop an Expert System for a new project and I want to use
>Drools, butI have some restrictions.
>
>The most important restriction: response time of the application must be
>less than one second. Also, the application access to one data base to
>retrieve some information and send it to the expert systetm.
>
>With this information, can anyone tell me, approximately, the response
>time
>of  Drools? It is very important to can use Drools in this project. And we
>like very much to use it. (We use in other projects without these
>restrictions).
>
>Thank in advance.
>
>Best regards, Jes?s.
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>------------------------------
>
>Message: 2
>Date: Tue, 27 Nov 2012 15:11:12 +0000
>From: Mauricio Salatino <salaboy at gmail.com>
>Subject: Re: [rules-users] Drools response time
>To: Rules Users List <rules-users at lists.jboss.org>
>Message-ID:
>       <CANzbnyVqkmBTHv7TxmUoV2ajVQ3bnQFpAyD3c-+yXs-jffAwLw at mail.gmail.com>
>Content-Type: text/plain; charset="iso-8859-1"
>
>Hi Jesus,
>Well do you want us to include the response time for your Database?
>The Drools Rule engine will keep all your facts inside the main memory
>(RAM) so it will be fast, but if you need to retrieve data from your
>database, you will need to take that into account. Depending on how you
>are
>doing that and how much data do you want to bring will be the response
>times.
>
>Cheers
>
>
>On Tue, Nov 27, 2012 at 3:06 PM, elMateo <soyelmateo at gmail.com> wrote:
>
>> Dear all,
>>
>> I need to develop an Expert System for a new project and I want to use
>> Drools, butI have some restrictions.
>>
>> The most important restriction: response time of the application must be
>> less than one second. Also, the application access to one data base to
>> retrieve some information and send it to the expert systetm.
>>
>> With this information, can anyone tell me, approximately, the response
>> time of  Drools? It is very important to can use Drools in this project.
>> And we like very much to use it. (We use in other projects without these
>> restrictions).
>>
>> Thank in advance.
>>
>> Best regards, Jes?s.
>>
>> _______________________________________________
>> rules-users mailing list
>> rules-users at lists.jboss.org
>> https://lists.jboss.org/mailman/listinfo/rules-users
>>
>>
>
>
>--
> - MyJourney @ http://salaboy.wordpress.com
> - Co-Founder @ http://www.jugargentina.org
> - Co-Founder @ http://www.jbug.com.ar
>
> - Salatino "Salaboy" Mauricio -
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>------------------------------
>
>Message: 3
>Date: Tue, 27 Nov 2012 16:17:02 +0100
>From: Luk?? Petrovick? <lpetrovi at redhat.com>
>Subject: Re: [rules-users] Drools response time
>To: rules-users at lists.jboss.org
>Message-ID: <1354029422.7785.3.camel at steam>
>Content-Type: text/plain; charset="UTF-8"
>
>Mauricio Salatino p??e v ?t 27. 11. 2012 v 15:11 +0000:
>> Well do you want us to include the response time for your Database?
>> The Drools Rule engine will keep all your facts inside the main memory
>> (RAM) so it will be fast, but if you need to retrieve data from your
>> database, you will need to take that into account. Depending on how
>> you are doing that and how much data do you want to bring will be the
>> response times.
>
>Going low-level, your standard Oracle JRE / OpenJDK doesn't guarantee
>response time. If it is a hard requirement to have timely responses,
>you'll have to buy a real-time JRE from some commercial vendor.
>
>Regards!
>
>--
>Luk?? Petrovick?
>QE Lead, JBoss Enterprise BRMS
>Phone: +420 532 294 123
>irc: lpetrovi, triceo
>
>
>
>------------------------------
>
>Message: 4
>Date: Tue, 27 Nov 2012 16:24:19 +0100
>From: elMateo <soyelmateo at gmail.com>
>Subject: Re: [rules-users] Drools response time
>To: lpetrovi at redhat.com, Rules Users List
>       <rules-users at lists.jboss.org>
>Message-ID:
>       <CAKx6_9YB_bJcsO3NAtsyQAzJGDBc8DxD_q8t95WScczNccHyiQ at mail.gmail.com>
>Content-Type: text/plain; charset="iso-8859-2"
>
>Thank for your response, Mauricio and Lukas!
>
>BR, Jes?s.
>
>
>On Tue, Nov 27, 2012 at 4:17 PM, Luk?? Petrovick?
><lpetrovi at redhat.com>wrote:
>
>> Mauricio Salatino p??e v ?t 27. 11. 2012 v 15:11 +0000:
>> > Well do you want us to include the response time for your Database?
>> > The Drools Rule engine will keep all your facts inside the main memory
>> > (RAM) so it will be fast, but if you need to retrieve data from your
>> > database, you will need to take that into account. Depending on how
>> > you are doing that and how much data do you want to bring will be the
>> > response times.
>>
>> Going low-level, your standard Oracle JRE / OpenJDK doesn't guarantee
>> response time. If it is a hard requirement to have timely responses,
>> you'll have to buy a real-time JRE from some commercial vendor.
>>
>> Regards!
>>
>> --
>> Luk?? Petrovick?
>> QE Lead, JBoss Enterprise BRMS
>> Phone: +420 532 294 123
>> irc: lpetrovi, triceo
>>
>> _______________________________________________
>> rules-users mailing list
>> rules-users at lists.jboss.org
>> https://lists.jboss.org/mailman/listinfo/rules-users
>>
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>------------------------------
>
>Message: 5
>Date: Tue, 27 Nov 2012 17:04:07 +0100 (CET)
>From: Mattias Nilsson Grip <mattias.nilsson.grip at redpill-linpro.com>
>Subject: Re: [rules-users] Question about drools-spring in a
>       multi-treaded container (like tomcat).
>To: Rules Users List <rules-users at lists.jboss.org>
>Message-ID:
>       <1242554540.25824035.1354032247194.JavaMail.root at redpill-linpro.com>
>Content-Type: text/plain; charset=utf-8
>
>Hi Gurvinder,
>
>knowledge sessions are not thread-safe so I believe your assumptions are
>correct. To be on the safe side you should change the ksession bean to
>have scope "prototype".
>
>Regards,
>Mattias
>
>----- Original Message -----
>> From: "Gurvinder Narula1" <gnarula1 at la-z-boy.com>
>> To: rules-users at lists.jboss.org
>> Sent: Tuesday, 27 November, 2012 3:08:18 PM
>> Subject: [rules-users] Question about drools-spring in a multi-treaded
>>container (like tomcat).
>>
>> Hello all,
>>
>> I've been reading up about drool-spring integration and have put
>> together a simple project that wires together a KnowledgeBase and
>> KnowledgeSession as follows :
>>
>>
>> < drools:resource id = "GroupUnit" type = "DRL"
>> source =
>> "file:/Users/drools/drools-spring-test/src/Rules/drls/GroupUnit.drl"
>> />
>>
>> < drools:resource id = "GradeUnit" type = "DRL"
>> source = "
>> file:/Users/drools/drools-spring-test/src/Rules/drls/GradeUnit.drl"
>> " />
>>
>> < drools:resource id = "EvaluateUnit" type = "DRL"
>> source = " file:/Users/drools/drools-spring-test/src/Rules/drls/
>> EvaluateUnit .drl" " />
>>
>> < drools:grid-node id = "node1" />
>> < drools:kbase id = "kbase1" node = "node1" >
>> < drools:resources >
>> < drools:resource ref = "GroupUnit" />
>> < drools:resource ref = "GradeUnit" />
>> < drools:resource ref = "EvaluateUnit" />
>> </ drools:resources >
>> </ drools:kbase >
>>
>> < drools:ksession id = "ksession" type = "stateful" kbase = "kbase1"
>> node = "node1" />
>>
>...
>>
>> The main question that I have is that ? is this solution thread-safe
>> ? From what I understand of spring is that beans configured without
>> any additional qualifiers are inherently singletons. And when
>> deployed in a multi-theaded container like tomcat, Spring assumes
>> that the beans being severed up a thread-safe. So from I have read
>> is that KnowledeSessions are inherently not thread safe. So putting
>> the 2 together, I leaning towards the assessment that this above
>> solution is NOT thread safe and that if I do want it to be thread
>> safe I should set the StatefulKnowledgeSession to 'prototype' and
>> not leave it as a singleton.
>>
>> Please let me know if I'm missing anything in my assessment here !
>>
>> Thanks in advance,
>> Gurvinder
>>
>> This message is intended only for the individual or entity to which
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>> not the intended recipient, please note that you are strictly
>> prohibited from disseminating or distributing this information
>> (other than to the intended recipient) or copying this information.
>> If you have received this communication in error, please notify us
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>> you.
>> _______________________________________________
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>> https://lists.jboss.org/mailman/listinfo/rules-users
>>
>
>
>
>------------------------------
>
>Message: 6
>Date: Tue, 27 Nov 2012 08:28:47 -0800 (PST)
>From: Greg Barton <greg_barton at yahoo.com>
>Subject: Re: [rules-users] Inserting Different Objects Of Same Class !
>To: Rules Users List <rules-users at lists.jboss.org>
>Message-ID:
>       <1354033727.51269.YahooMailNeo at web184805.mail.gq1.yahoo.com>
>Content-Type: text/plain; charset="iso-8859-1"
>
>Are the values in the list ever tested? (With rules conditionally firing
>if the contents of a list changes.) ?In the rules you've provided so far
>they are not. ?If this is the case then there's no need to match them in
>the conditions and the use of globals is just fine. ?The only reason to
>match a list in the rule conditions is if changing the list could result
>in that rule firing.
>
>
>________________________________
> From: abhinay_agarwal <abhinay_agarwal at infosys.com>
>To: rules-users at lists.jboss.org
>Sent: Tuesday, November 27, 2012 4:36 AM
>Subject: Re: [rules-users] Inserting Different Objects Of Same Class !
>
>I was initially using two lists making them global, and it was working for
>me, but then i read
>
>"Globals are not designed to share data between rules and they should
>never
>be used for that purpose. Rules always reason and react to the working
>memory state, so if you want to pass data from rule to rule, assert the
>data
>as facts into the working memory."
>
>So, thought might be somewhere, an issue can arise and changed the global
>facts.
>
>Thanks,
>AA
>
>
>
>--
>View this message in context:
>http://drools.46999.n3.nabble.com/Inserting-Different-Objects-Of-Same-Clas
>s-tp4020971p4020981.html
>Sent from the Drools: User forum mailing list archive at Nabble.com.
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