[rules-users] Calling drools into the Web Application.

[Jackson Cunha]

So, let's talk about some points:

   - You should not create a new knowledge base every time you need a
   session, because construction of knowledge bases is very expensive. You
   would do this at start of application applying Singleton pattern.
   - If you already have a knowledge base, you are able to get parameters
   from GET or POST using your preferred controller, instantiate your objects
   using then and after that pass your objects for a new knowledge session
   (stateless or statefull).


On 5 December 2011 10:13, srinivasasanda <srinivasasanda at gmail.com> wrote:

> this piece of application is working using drools project, but its not
> working in (webapplication)
>
> i had a text box age and income that values i am trying passing this data
> to
> rule and run the rules.
> i created one jsp , jsp call servlet, In servelt i called the below piece
> of
> code in servlet but not executing
>
> I am trying to include it this piece of code into webapplication (in
> servlet
> or jsp) it is showing error.
>
> public static final void runMain() {
>        try {
>                RuleAgent agent =
> RuleAgent.newRuleAgent("/guvnor.properties");
>            RuleBase ruleBase = agent.getRuleBase();
>            WorkingMemory workingMemory = ruleBase.newStatefulSession();
>            FactType ft= ruleBase.getFactType("sample.person");  //created
> declarative model in guvnor
>            Object obj=ft.newInstance();
>            ft.set(obj,"age", 67);
> //setting data into into person
>            ft.set(obj, "income", 1000);
>            workingMemory.insert(obj);
>            workingMemory.fireAllRules();
>            System.out.print(ft.get(obj, "age"));
>            System.out.print(ft.get(obj, "income"));
>              } catch (Throwable t) {
>            t.printStackTrace();
>        }
>    }
>
>
> 12:46:44,409 ERROR [STDERR] RuleAgent(default) INFO (Mon Dec 05 12:46:44
> GMT
> 2011): Configuring with
>  newInstance=false, secondsToRefresh=-1
> 12:46:44,419 ERROR [STDERR] RuleAgent(default) INFO (Mon Dec 05 12:46:44
> GMT
> 2011): Configuring pack
> age provider : URLScanner monitoring URLs:
> http://localhost:8082/guvnor-5.2.0.Final-jboss-as-5.1/or
> g.drools.guvnor.Guvnor/package/sample/LATEST
> 12:46:44,669 INFO  [STDOUT] INFO  05-12 12:46:44,669
> (NilAuthenticator.java:authenticate:35)     All
>  users are guests.
>
>
> 12:46:44,359 ERROR [STDERR] java.lang.IllegalArgumentException: Could not
> parse knowledge.
> 12:46:44,359 ERROR [STDERR]     at
> com.sample.DroolsTest.readKnowledgeBase(DroolsTest.java:115)
> 12:46:44,359 ERROR [STDERR]     at
> com.sample.DroolsTest.FireRools(DroolsTest.java:62)
> 12:46:44,359 ERROR [STDERR]     at p1.Login.doGet(Login.java:37)
> 12:46:44,359 ERROR [STDERR]     at
> javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
> 12:46:44,359 ERROR [STDERR]     at
> javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
>
>
> 12:46:44,699 ERROR [STDERR] RuleAgent(default) EXCEPTION (Mon Dec 05
> 12:46:44 GMT 2011): org.drools.
> rule.Package; local class incompatible: stream classdesc serialVersionUID =
> 510, local class serialV
> ersionUID = 400. Stack trace should follow.
> 12:46:44,699 ERROR [STDERR] java.io.InvalidClassException:
> org.drools.rule.Package; local class inco
> mpatible: stream classdesc serialVersionUID = 510, local class
> serialVersionUID = 400
> 12:46:44,699 ERROR [STDERR]     at
> java.io.ObjectStreamClass.initNonProxy(ObjectStreamClass.java:562
> )
>
> --
> View this message in context:
> http://drools.46999.n3.nabble.com/Calling-drools-into-the-Web-Application-tp3561362p3561362.html
> Sent from the Drools: User forum mailing list archive at Nabble.com.
> _______________________________________________
> rules-users mailing list
> rules-users at lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
>



-- 
----------------------------------------------------------------------------------------------------------------
Jackson Cunha Cassimiro (CereB)
Bacharel em Ciencia da Computação - UFPI
MSN: jackson.cereb at gmail.com
Telefone Móvel +55 86 9928 1251
Analista de Sistemas - Infoway - http://www.infoway-pi.com.br
Missão Infoway - "Influenciar a Gestão de Sistemas de Saúde através de
e-health"

("A vida é um combate que os fracos abate, aos bravos, aos fortes só pode
exaltar" - Canção do Tamoio, Gonçalves Dias)
----------------------------------------------------------------------------------------------------------------
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