[rules-users] Drools Java and .Net

[Salaboy]

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 -
>>>> 
>>>> _______________________________________________
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>>>> 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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