[rules-users] java.lang.NullPointerException in simple example

[Wolfgang Laun]

Check the result of
     KieSession ksession = kc.newKieSession("CashFlowKS");
Might be null.
-W

On 19/02/2014, ahgiovanini <ahgiovanini at gmail.com> wrote:
> Hi guys!
>
> I'm new in the world of jboss and drools and I'm making some simple
> examples
> that existing on
> https://github.com/droolsjbpm/drools/tree/master/drools-examples-api
>
> Now, I'm studing the CashFlow example and in my project when I run it, I
> receive a error message saying:
> Exception in thread "main" java.lang.NullPointerException
> 	at com.sample.CashFlowMain.main(CashFlowMain.java:30)"
>
> I don't know the why this message, because I set the acp at lines 20 and
> 21.
>
> Someone would help me please?
>
> Thanks
>
>
> package com.sample;
>
> import org.kie.api.KieServices;
> import org.kie.api.runtime.KieContainer;
> import org.kie.api.runtime.KieSession;
> import org.kie.api.runtime.rule.FactHandle;
>
> import java.text.SimpleDateFormat;
> import java.util.Date;
>
> public class CashFlowMain {
>
>     public static void main(String[] args) throws Exception {
>         SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
>
>         KieContainer kc =
> KieServices.Factory.get().getKieClasspathContainer();
>         KieSession ksession = kc.newKieSession("CashFlowKS");
>
>         AccountPeriod acp = new AccountPeriod();
>         acp.setStart(date("2013-01-01"));  // set acp - line 20
>         acp.setEnd(date("2013-03-31"));    // set acp - line 21
>
>         Account ac = new Account(1, 0);
>
>         CashFlow cf1 = new CashFlow(date( "2013-01-12"), 100,
> CashFlowType.CREDIT, 1 );
>         CashFlow cf2 = new CashFlow(date( "2013-02-2"), 200,
> CashFlowType.DEBIT, 1 );
>         CashFlow cf3 = new CashFlow(date( "2013-05-18"), 50,
> CashFlowType.CREDIT, 1 );
>         CashFlow cf4 = new CashFlow(date( "2013-03-07"), 75,
> CashFlowType.CREDIT, 1 );
>
>         FactHandle fh = ksession.insert(acp);
>         ksession.insert( ac );
>
>         ksession.insert( cf1 );
>         ksession.insert( cf2 );
>         ksession.insert( cf3 );
>         ksession.insert( cf4 );
>
>         ksession.fireAllRules();
>
>         acp.setStart(date( "2013-04-01"));
>         acp.setEnd(date( "2013-06-31"));
>         ksession.update(fh, acp);
>
>
>         ksession.fireAllRules();
>     }
>
>     public static Date date(String str) throws Exception {
>         SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
>
>         return sdf.parse( str );
>     }
>
>
> }
>
>
>
>
>
> --
> View this message in context:
> http://drools.46999.n3.nabble.com/java-lang-NullPointerException-in-simple-example-tp4028177.html
> Sent from the Drools: User forum mailing list archive at Nabble.com.
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