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@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 >

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(a)lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org] De la part de gurks Envoyé : mercredi 5 septembre 2007 15:11 À : rules-users(a)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@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 >> >