I have a set of externally defined java beans that are utilized elsewhere in the overarching application, and would like to declare these external classes as events within drools. I am able declare these objects as events, and compile a drools DRL file, and execute the rules.  When the same DRL is imported into the Guvnor, the resulting package “PKG” issues an  “unable to define Type Declaration class {object}” exception error.  Preliminary investigation has turned up JIRA #’s GUVNOR-379 <https://jira.jboss.org/jira/browse/GUVNOR-379>, and BRMS-144 <https://jira.jboss.org/jira/browse/BRMS-144>, that indicate this behavior has been identified, but no solution is presented.  The Drools documentation for both the expert and fusion component functionality indicates that metadata can be declared with or without actually declaring fields. This capability is key to allowing the utilization of externally defined data model objects within drools.

Example DRL declaration section that works as specified when the DRL file is built into a knowledge base, but does not work when the Guvnor package is built in to a knowledge base. I am currently utilizing Drools 5.0.1 in both the IDE development environment as well as the Guvnor deployment environment.

begin  data model fragment …

Import com.datamodel.MyEvent;

Declare MyEvent

   @role(event)

  @timestamp(eventDate)

end

… end data model fragment

Seems that the data model definition shown above should produce the same results whether using the DRL resource type, or the PKG resource produced by the Guvnor package builder.  Are these JIRA’s closed in 5.1 or are they still pending.  The system utilizing the Guvnor should allow deployment of DRLs to the GUVNOR without change, this bug does not allow that.

David A. Meyer
System Engineer
I&SS Mission Operations - Colorado
Boeing Defense, Space & Security
The Boeing Company
Telephone 303-307-5836