Re: [rules-users] java.lang.NullPointerException in simple example
Hi laune, you are right, the ksession is null.
What would be the reason for this?
The code,
"
KieContainer kc =
KieServices.Factory.get().getKieClasspathContainer();
KieSession ksession = kc.newKieSession("CashFlowKS");
" is the original code of example. Maybe I set something wrong in my
project?
My kmodule.xml is:
<?xml version="1.0" encoding="UTF-8"?>
<kmodule xmlns="http://jboss.org/kie/6.0.0/kmodule">
<kbase name="kBase">
<ksession name="CashFlowKS" />
</kbase>
</kmodule>
-----------------------------
The rule (CashFlow.drl) is
package com.sample
dialect "mvel"
rule "Increase balance for AccountPeriod Credits"
when
ap : AccountPeriod( )
ac : Account( )
cf : CashFlow( type == CashFlowType.CREDIT, accountNo == ac.accountNo,
date >= ap.start && <= ap.end )
then
ac.balance = ac.balance + cf.amount;
end
rule "Decrease balance for AccountPeriod Debits"
when
ap : AccountPeriod( )
ac : Account( )
cf : CashFlow( type == CashFlowType.DEBIT, accountNo == ac.accountNo,
date >= ap.start && <= ap.end )
then
ac.balance = ac.balance - cf.amount;
end
rule "Print blance for AccountPeriod" salience -50
when
ap : AccountPeriod( )
ac : Account( )
then
System.out.println( "Account Number " + ac.accountNo + " balance
" +
ac.balance );
end
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