[rules-users] Using global variable in DRL file

[Michael Anstis]

Try reading the Drools Expert User Guide section about the use of Globals :)

Globals are not Facts to be reason in the Left-Hand-Side (WHEN) part of a
rule.

Either use the Global (assuming it contains static data) and initialize it
correctly from within Java code (see the User Guide) or insert it as a Fact
and reason with it.

With kind regards,

Mike

On 26 July 2012 09:38, zeeshan <zeeshan.spring at gmail.com> wrote:

> Hi All !
>
> I am trying use global variable in DRL file but when I am using it, gives
> Exception. Please have a look at the DRL file -----
>
>
>
>
> package com.drools.rules
> import com.drools.facts.*;
> *global CSVBeanAgent csvAgent;*  [here I have declared the Global variable]
>
>
>
> rule "Calculating Agent APE"
>
>         salience 35
>         no-loop true
>         when
>
>                 $csvPolicy : CSVBeanPolicy()
>                 //$csvAgent : CSVBeanAgent()
>         then
>
>
>    System.out.println("For agent --->zzzzz in rule setting premium form
> rate>>>>"+$csvPolicy.getPremiumMode());
>     double policyAPE=$csvPolicy.getPolicyAPE();
>     System.out.println("policyAPE>>>>>"+policyAPE);
>     *System.out.println("Agent
> zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz>>>>>"+csvAgent);*
>     double agentAPE=0.0;
>       if(csvAgent.getAgentNo()==$csvPolicy.getAgentNo()){
>       System.out.println("inside if");
>      agentAPE=agentAPE+policyAPE;
>       }
>       csvAgent.setAgentAPE(agentAPE);
>
>  System.out.println("AgentAPE>>>>>>>>>>>>>>>"+csvAgent.getAgentAPE());
>            update($csvPolicy);
>
> end
>
>
> Above is my rule....the Bold one is I am trying to the value of *csvAgent*,
> it gives *null* value. Please help me in finding the solution i.e. How to
> declare the global variable and how to use it in DRL file.
>
> Thanks !
>
>
>
>
>
>
> --
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