[rules-users] Usage of Drools in a RCP project

[GRILLON, Jean Pierre]

Hi,

You might be interested by "DynamicImport-Package" (MANIFEST.MF) in your drools plugin, to allow it to dynamically access your classes that are located in another plugin.
These configurations depend a lot on your plugins architecture/dependencies.

Regards,
Jean-Pierre Grillon

-----Message d'origine-----
De : rules-users-bounces at lists.jboss.org [mailto:rules-users-bounces at lists.jboss.org] De la part de gurks
Envoyé : mercredi 5 septembre 2007 15:11
À : rules-users at lists.jboss.org
Objet : Re: [rules-users] Usage of Drools in a RCP project


Thanx for your hints but you might have missunderstood something.

All the classes needed from Drools plugin are found and I can initialize the
ruleBase unless I try to add
an import statement for a java class into the DRL file. When the DRL file
gets parsed by Drools I
get this strange exception. Don't know why the class cannot be found. I
assume the class is
loaded by means of reflections in Drools. This means when the class is on
class path it should
also be found or do I forget something important???



Gaurav2007 wrote:
> 
> i am also working in same technology i am not able to use service of one
> plug-in from another in following cases :
> 1) export the required package of dependent plug-in,
> 2) add all the required jars in classpath from runtime tab of mainfest.mf
> file of your plugin.
> 3) in run time configuration of application required plug-in is not
> selected.
> 
> 
> 
> gurks wrote:
>> 
>> I'm working on a RCP project and now want to integrate Drools. There are
>> two plugins: CORE and UI.
>> The initialization of Drools is done in a Manager class in the core
>> plugin. The same plugin also has a class named Service. This class should
>> be imported in a DRL-file. The Manager is first called in the UI plugin
>> but don't think that's the problem. The Drools jars are placed in its own
>> plugin and the other two plugins are augemnted with the dependency
>> needed.
>> 
>> When I try to initialize the ruleBase I get the following exception:
>> 
>> org.drools.rule.InvalidRulePackage: Unable to resolve ObjectType
>> 'Service' : [Rule name=Your First Rule, agendaGroup=MAIN, salience=0,
>> no-loop=false]
>> Rule Compilation error : [Rule name=Your First Rule, agendaGroup=MAIN,
>> salience=0, no-loop=false]
>> 	at/mcw/jdent/services/core/persistent/Rule_Your_First_Rule_0.java (2:55)
>> : Only a type can be imported. test.core.persistent.Service resolves to a
>> package
>> 	at/mcw/jdent/services/core/persistent/Rule_Your_First_Rule_0.java
>> (7:342) : $serviceName cannot be resolved
>> org.drools.compiler.ImportError at 17a99
>> 	at org.drools.rule.Package.checkValidity(Package.java:408)
>> 	at
>> org.drools.common.AbstractRuleBase.addPackage(AbstractRuleBase.java:288)
>> ...
>> 
>> I don't know why Drools does not find my Service class. It's in the same
>> plugin as the manager and should be visible to it.
>> 
>> Could anybody give me an advice how I can integrate Drools into my RCP
>> project correctly.
>> 
>> Thanx, gurks
>> 
> 
> 

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