Re: [rules-users] Drools Java and .Net

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(a)agserv.eu&gt; 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&lt;michael.anstis(a)gmail.com&gt; >>>> >>>>> 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)&lt;bhaskar.gorantla(a)ge.com&gt; >>>>> >>>>>> 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 >>>>>> >>>>>> >>>>>> >>>>>> _______________________________________________ >>>>>> rules-users mailing list >>>>>> rules-users(a)lists.jboss.org >>>>>> https://lists.jboss.org/mailman/listinfo/rules-users >>>>>> >>>>>> >>>>> _______________________________________________ >>>>> rules-users mailing list >>>>> rules-users(a)lists.jboss.org >>>>> https://lists.jboss.org/mailman/listinfo/rules-users >>>>> >>>>> >>>> >>>> -- >>>> - 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(a)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(a)tsctech.com <mailto:corneil@tsctech.com> >> www.tsctech.com <http://www.tsctech.com> >> >> _______________________________________________ >> rules-users mailing list >> rules-users(a)lists.jboss.org >> https://lists.jboss.org/mailman/listinfo/rules-users >> >> > > -- > View this message in context: > http://drools-java-rules-engine.46999.n3.nabble.com/Drools-Java-and-Net-t... > Sent from the Drools - User mailing list archive at Nabble.com. > > _______________________________________________ > rules-users mailing list > rules-users(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users