Hi, I am so confused with which version of DROOLS I should be using . I trid with 5.0.0 M2 and the error I saw is below. Then I tried with 4.0.7 but it gave error as below it had references of 1.4 of MVEL version.
Exception in thread "main" org.mvel.PropertyAccessException: null pointer exception in property: p.getUsers()
at org.mvel.optimizers.impl.refl.ReflectiveAccessorOptimizer.compileGetChain(ReflectiveAccessorOptimizer.java:143)
at org.mvel.optimizers.impl.refl.ReflectiveAccessorOptimizer.optimizeAccessor(ReflectiveAccessorOptimizer.java:96)
at org.mvel.ASTNode.getReducedValueAccelerated(ASTNode.java:194)
at org.mvel.MVELRuntime.execute(MVELRuntime.java:87)
at org.mvel.CompiledExpression.getValue(CompiledExpression.java:98)
at org.mvel.MVEL.executeExpression(MVEL.java:219)
Can you please suggest which version of DROOLS should I be using? can you direc me to the MAVEN site.
Thanks
shikha
"Edson Tirelli" <tirelli@post.com> Sent by: rules-users-bounces@lists.jboss.org11/06/2008 03:12 PM
Rules Users List <rules-users@lists.jboss.org>
"Rules Users List" <rules-users@lists.jboss.org> 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.org11/06/2008 02:19 PM
Rules Users List <rules-users@lists.jboss.org>
"Rules Users List" <rules-users@lists.jboss.org> 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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JBoss Drools Core Development
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