[jboss-jira] [JBoss JIRA] Updated: (JBRULES-765) org.drools.ide plugin MANIFEST.MF should be allowed to find classes from other plugins at runtime to correclty resolve facts

Thu Apr 12 09:53:58 EDT 2007

     [ http://jira.jboss.com/jira/browse/JBRULES-765?page=all ]

Mark Proctor updated JBRULES-765:
---------------------------------

    Assignee: Kris Verlaenen  (was: Mark Proctor)

> org.drools.ide plugin MANIFEST.MF should be allowed to find classes from other plugins at runtime to correclty resolve facts
> ----------------------------------------------------------------------------------------------------------------------------
>
>                 Key: JBRULES-765
>                 URL: http://jira.jboss.com/jira/browse/JBRULES-765
>             Project: JBoss Rules
>          Issue Type: Feature Request
>      Security Level: Public(Everyone can see) 
>          Components: Eclipse IDE
>    Affects Versions: 3.0.5
>         Environment: Eclipse 3.2.2 + EMF 2.1 + JBRules 3.0.5
>            Reporter: Christophe Avare
>         Assigned To: Kris Verlaenen
>            Priority: Trivial
>
> When using Eclipse, each plugin have a limited class loading capability.
> When used in an Eclipse application (RCP or not), the model and facts usually comes from other plugins, but the packages and rules are scoped by the org.drools.ide plugin class loader.
> While adding this plugin as a runtime dependency of the other plugins solves the build time problem of creating a package and compiling it, at runtime when rules are fired, the org.drools.ide package cannot resolve the actual class of the facts, raising a ClassNotFoundException.
> Solving this issue is easy as it involves only an additional line in the plugin MANIFEST.MF:
> Eclipse-BuddyPolicy: registered
> Each plugin that wants to expose its classes to the rule engine thus have to have its own exported packages registered with the org.drools.ide by adding:
> Eclipse-RegisterBuddy: org.drools.ide
> In their own plugin manifest.
> This article in eclipsezone have the whole picture: http://www.eclipsezone.com/articles/eclipse-vms/

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