[rules-users] Drools Java and .Net
Salaboy
salaboy at gmail.com
Wed Feb 2 06:43:07 EST 2011
Are you including drools-compiler as a dependency?
Greetings!
- CTO @ http://www.plugtree.com
- MyJourney @ http://salaboy.wordpress.com
- Co-Founder @ http://www.jbug.com.ar
- Mauricio "Salaboy" Salatino -
On 02/02/2011, at 05:40, FrankVhh <frank.vanhoenshoven at agserv.eu> wrote:
>
> Hi all,
>
> Thanks for your inputs. As you suggested, this week I tried to use IKVM to
> make Drools and .NET work together.
>
> Converting the Java implementation of drools to dll, importing dll into .NET
> and calling the java functions isn't that hard, once you are a little bit
> familiar with ikvm. No syntax errors in Visual Studio when I do this.
>
> However, there seems to be going something wrong on execution. It appears to
> me that the execution environment does not recognize the "drools-language".
>
> The execution crashes on the first call of Drools code
> (knowledgebuilderfactory.new KnowledgeBuilder()) with the errors:
> - IllegalArgumentException : Unable to instantiate service for Class
> 'org.drools.builder.KnowledgeBuilderFactoryService"
> - ClassNotFoundException:
> org.drools.builder.impl.KnowledgeBuilderFactoryServiceImpl
>
> This means there are some dependancies missing, right? But should I be
> looking to add some jars to the IKVM-JVM? Or is this definitely a problem of
> wrong jar to dll conversion?
>
> Corneil, could you tell me whether you ran into dependancy problems as well?
>
> fyi I also tried to import the drools library as dll into .NET and then
> rewrite the entire wrapping code in .NET. This didn't return any syntax
> errors either, but got stuck in execution as well. (With same errors).
>
> Regards,
> Frank
>
>
> Corneil du Plessis wrote:
>>
>> We have successfully used IKVM to create a dlls for our Drools
>> application.
>>
>> The performance was a bit slower on IKVM/.Net as in Sun Java 5.
>> We dynamically load a large number of rules and found the largest impact
>> is to the 'load time'
>>
>> The performance impact was not such that it would make a network call
>> viable; especially with 1000s of clients.
>>
>> Apart from the performance impact the behaviour is exactly the same.
>>
>> On 25/01/2011 17:04, FrankVhh wrote:
>>> Hi all,
>>>
>>> Suppose that you have a rule engine that needs to be embedded on the
>>> machine
>>> and that there is no way to call the rules as a service from a
>>> centralized
>>> server, what approach would one have to choose to make Drools and .NET
>>> work?
>>>
>>> The rulke engine will have to be cached to improve performance, so that
>>> part, until there is an up-to-date version of Drools.NET, has to be in
>>> Java
>>> anyway. Then you expose your JAVA code as a (local) service and let .NET
>>> call it? Or am I seeing things wrong here?
>>>
>>> I must stipulate that I am not an expert in .NET at all, and I know only
>>> barely enough Java to get Drools working :-).
>>>
>>> Thanks for your help.
>>>
>>> Kind regards,
>>> Frank
>>>
>>>
>>> salaboy wrote:
>>>> Yes, and if you want to use the rule engine from .NET you can use the
>>>> Drools
>>>> Server that expose the Drools Runtime in REST and SOAP interfaces :)
>>>> Greetings.
>>>>
>>>> 2011/1/19 Michael Anstis<michael.anstis at gmail.com>
>>>>
>>>>> Hi,
>>>>>
>>>>> I believe the .NET implementation of Drools is somewhat out dated.
>>>>>
>>>>> However Drools ticks all your other requirements.
>>>>>
>>>>> With kind regards,
>>>>>
>>>>> Mike
>>>>>
>>>>> 2011/1/19 Gorantla, Bhaskar (GE Capital)<bhaskar.gorantla at ge.com>
>>>>>
>>>>>> We are looking for a rules engine that has the following
>>>>>> characteristics.
>>>>>>
>>>>>>
>>>>>>
>>>>>> 1. Supports both Java and .net
>>>>>>
>>>>>> 2. Provides a business user friendly UI for creating/editing
>>>>>> rules
>>>>>>
>>>>>> 3. Supports versioning
>>>>>>
>>>>>> 4. The rues in the rules repository are accessible to both Java
>>>>>> and
>>>>>> .net applications – Nice to have
>>>>>>
>>>>>>
>>>>>>
>>>>>> Do you know whether Drools supports all the above?
>>>>>>
>>>>>>
>>>>>>
>>>>>> Thanks
>>>>>>
>>>>>>
>>>>>>
>>>>>> _______________________________________________
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>>>>>> rules-users at lists.jboss.org
>>>>>> https://lists.jboss.org/mailman/listinfo/rules-users
>>>>>>
>>>>>>
>>>>> _______________________________________________
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>>>>>
>>>>>
>>>>
>>>> --
>>>> - CTO @ http://www.plugtree.com
>>>> - MyJourney @ http://salaboy.wordpress.com
>>>> - Co-Founder @ http://www.jbug.com.ar
>>>>
>>>> - Salatino "Salaboy" Mauricio -
>>>>
>>>> _______________________________________________
>>>> rules-users mailing list
>>>> rules-users at lists.jboss.org
>>>> https://lists.jboss.org/mailman/listinfo/rules-users
>>>>
>>>>
>>
>> --
>>
>> Corneil du Plessis - Software Architect
>>
>> TSC Technologies (Pty) Ltd
>> (o) +27 11 431 1666
>> (f) +27 86 674 2962
>> (c) +27 82 530 9259
>> Email: corneil at tsctech.com <mailto:corneil at tsctech.com>
>> www.tsctech.com <http://www.tsctech.com>
>>
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>>
>
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>
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