My mvel version is mvel 2.0..Can you suggets which mvel version should I be using?


"Edson Tirelli" <tirelli@post.com>
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11/06/2008 03:12 PM
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Rules Users List <rules-users@lists.jboss.org>

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Re: [rules-users] DROOLS from clause giving Error






  This is an MVEL problem that Mike fixed in one of the latest versions: it was raising that error message when unable to resolve a variable reference (processor in this case).

  Can you please confirm what versions of drools and mvel are you using?

  Also, try to use mvel syntax, just in case:

$x : DBSubscription(report == $event.report)
from processor.users

  []s
  Edson

2008/11/6 <shikha.x.aggarwal@jpmchase.com>

Thanks for the quick respose..I modified the rule now to -


package
org.drools.examples;

import
org.drools.examples.templates.DBSubscription;
import
org.drools.examples.templates.Event;

global
java.util.List list
global
org.drools.examples.Processor processor;

rule
"Rule1"
 
when
           $event : Event(eventId ==
"eventId.IR.001")        
            $x : DBSubscription(report == $event.report) from processor.getUsers()  
       
then
               list.add($x);        

end


Still facing some issue, Looking into it


Exception in thread "main" [Error: unbalanced braces ( ... )]

[Near : {... processor.getUsers( ....}]

       at org.mvel.util.ParseTools.balancedCapture(
ParseTools.java:1134)
       at org.mvel.optimizers.impl.refl.ReflectiveAccessorOptimizer.getMethod(
ReflectiveAccessorOptimizer.java:550)
       at org.mvel.optimizers.impl.refl.ReflectiveAccessorOptimizer.getBeanProperty(
ReflectiveAccessorOptimizer.java:438)
       at org.mvel.optimizers.impl.refl.ReflectiveAccessorOptimizer.compileGetChain(
ReflectiveAccessorOptimizer.java:265)
       at org.mvel.optimizers.impl.refl.ReflectiveAccessorOptimizer.optimizeAccessor(
ReflectiveAccessorOptimizer.java:126)
       at org.mvel.ast.ASTNode.getReducedValueAccelerated(
ASTNode.java:141)
       at org.mvel.MVELRuntime.execute(
MVELRuntime.java:77)


"David Sinclair" <dsinclair@chariotsolutions.com>
Sent by:
rules-users-bounces@lists.jboss.org

11/06/2008 02:19 PM


Please respond to
Rules Users List <
rules-users@lists.jboss.org>

To
"Rules Users List" <rules-users@lists.jboss.org>
cc
Subject
Re: [rules-users] DROOLS from clause giving Error







What is Processor? Doesn't look like it is a bound variable. Is it from DBSubscription?

On Thu, Nov 6, 2008 at 2:11 PM, <
shikha.x.aggarwal@jpmchase.com> wrote:

Hi,

I am using the from clause of drools and have written the following expression -

rule
"Rule1"
 
when
              $event : Event(eventId ==
"eventId.IR.001"),
              $dbS : DBSubscription( report == $event.report )
from Processor.getUsers()
     
then
              list.add($dbS);        


Here processor.getUsers writtens me a list of DBSubscription, When I load this package using

builder.addPackageFromDrl( source );


I get an error saying -

Exception in thread "main"
org.drools.compiler.DroolsParserException: Unknown error while parsing. This is a bug. Please contact the Development team.
      at org.drools.compiler.DrlParser.compile(
DrlParser.java:219)
      at org.drools.compiler.DrlParser.parse(
DrlParser.java:73)
      at org.drools.compiler.DrlParser.parse(
DrlParser.java:77)

Would Appreciate any help on the same.


thanks

Shikha


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--
Edson Tirelli
JBoss Drools Core Development
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