[rules-dev] MVEL in functions?

[Michael Neale]

OK created this: https://jira.jboss.org/jira/browse/JBRULES-2298

On Tue, Oct 13, 2009 at 9:38 AM, Michael Neale <michael.neale at gmail.com> wrote:
> Hi Steve - yes that seems to work - hence why I have not noticed it
> before. I wonder with 4.0.x if it was actually using MVEL for the
> function body, or flipping back to the java dialect (which is what
> happens when you put it in a different DRL now).
>
> On Tue, Oct 13, 2009 at 1:24 AM, Steve Ronderos <steve.ronderos at ni.com> wrote:
>>
>> Hi Michael,
>>
>> We are experiencing the same issue.  We have had to put our functions in a
>> different .drl to get around this for now.  If it helps any, this was
>> working ok in version 4.0.7, and broke when we went to 5.0.1.
>>
>> Thanks,
>>
>> Steve Ronderos
>>
>> rules-dev-bounces at lists.jboss.org wrote on 10/11/2009 11:52:04 PM:
>>
>>> [image removed]
>>>
>>> [rules-dev] MVEL in functions?
>>>
>>> Michael Neale
>>>
>>> to:
>>>
>>> Rules Dev List
>>>
>>> 10/11/2009 11:53 PM
>>>
>>> Sent by:
>>>
>>> rules-dev-bounces at lists.jboss.org
>>>
>>> Please respond to Rules Dev List
>>>
>>> Hey is mvel in functions broken? I have a distant memory of something
>>> along these lines. I was just trying something like:
>>>
>>> package jboss.cloud
>>>
>>> dialect "mvel"
>>>
>>>
>>> #trying to get functions working...
>>> rule "something"
>>>     when
>>>         s: SimpleFact(id == 42, name == "michael")
>>>     then
>>>         System.out.println("hello");
>>> end
>>>
>>> function String doSomething() {
>>>  return "hey";
>>> }
>>>
>>> And I get:
>>>
>>> java.lang.NullPointerException
>>>    at org.drools.rule.builder.dialect.mvel.MVELDialect.compile
>>> (MVELDialect.java:510)
>>>    at org.drools.rule.builder.dialect.mvel.MVELDialect.addFunction
>>> (MVELDialect.java:338)
>>>    at
>>> org.drools.compiler.PackageBuilder.addFunction(PackageBuilder.java:1104)
>>>    at
>>> org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:626)
>>>    at org.drools.compiler.PackageBuilder.addPackageFromDrl
>>> (PackageBuilder.java:290)
>>>    at org.drools.compiler.PackageBuilder.addKnowledgeResource
>>> (PackageBuilder.java:488)
>>>    at org.drools.builder.impl.KnowledgeBuilderImpl.add
>>> (KnowledgeBuilderImpl.java:25)
>>>
>>> (haven't tried trunk) - anyone else seen this?
>>> removing the dialect "mvel" at the package level at it is fine.
>>>
>>>
>>>
>>>
>>>
>>> --
>>> Michael D Neale
>>> home: www.michaelneale.net
>>> blog: michaelneale.blogspot.com
>>> _______________________________________________
>>> rules-dev mailing list
>>> rules-dev at lists.jboss.org
>>> https://lists.jboss.org/mailman/listinfo/rules-dev
>>
>> _______________________________________________
>> rules-dev mailing list
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>>
>>
>
>
>
> --
> Michael D Neale
> home: www.michaelneale.net
> blog: michaelneale.blogspot.com
>



-- 
Michael D Neale
home: www.michaelneale.net
blog: michaelneale.blogspot.com