[jboss-user] [jBPM] - jBPM 5 Guvnor Build Binary Package for KnowledgeAgent

byungwoojun do-not-reply at jboss.com
Fri Apr 15 16:08:20 EDT 2011

byungwoojun [http://community.jboss.org/people/byungwoojun] created the discussion

"jBPM 5 Guvnor Build Binary Package for KnowledgeAgent"

To view the discussion, visit: http://community.jboss.org/message/600380#600380

I am using Guvnor as a resource repository system for my jBPM 5-based application. Using Eclipse BPMN2, I defined some custom drools rulebased work item defintions. In the definitions, I used my custom POJO class objects (e.g., com.mycompany.Xyz, com.mycompany.XyzResult) for service task parameters.


    "name" : "Create XYZ task",
    "parameters" : [
      "interface" : new StringDataType(),
      "xyz" : new ObjectDataType("*com.mycompany.Xyz*")
    "results" : [
        "result" : new ObjectDataType("*com.mycompany.XyzResult*")
    "displayName" : "Create XYZ"

- Using Eclipse BPMN2 designer, I applied the above service task into my process definition. 
- Then, I exported the resource to the Guvnor to store it in Guvnor. 
- Then, my following code (using KnowledgeAgent) gets the resources from Guvnor. I used the KnowledgeAgent becuase I do NOT want to change code whenever I add new resources, which is not practical!!!


private static KnowledgeBase readKnowledgeBase() throws Exception {
  KnowledgeAgent kagent = KnowledgeAgentFactory.newKnowledgeAgent("Guvnor default");
    .newUrlResource(AutomationProperties.getInstance().getProperty("KNOWLEDGE_RESOURCE_URL") + 
  KnowledgeBase kbase = kagent.getKnowledgeBase();
  return kbase;

I realized that I needed to do one more step from Guvnor before I run my code. That is I need to build a biniary package. So, I clicked the Build Package button from my package. Then, I got an error message, saying that it does not resolve the com.mycompany.Xyz and com.mycompany.XyzResult. It looks like Guvnor was compiling to build a package. Then, I learned there is a menu "Upload POJO Model jar" in Guvnor, and I need to configure the import pacakge for building a binary package, etc....

Here are my questions. 

- Is it a normal procedure (adding POJO Jars into Guvnor, etc.) to include custom POJO classes in the Service task definitions? 
- Do I really have to build a binary package for KnowledgeAgent. I want to use Guvnor just for repository system, without those compilations. Since all the jars and classes are alreay defined in the classpath in Eclipse and JEE app server. When I used resourceFactory add, it just needs to bring in resources as resources, instead of bindary packages. 
Any suggestions will be appreciated.


private final static String KNOWLEDGE_RESOURCE_URL = " http://localhost:7001/drools-guvnor/org.drools.guvnor.Guvnor/package/ http://localhost:7001/drools-guvnor/org.drools.guvnor.Guvnor/package/";
private final static String KNOWLEDGE_RESOURCE_PACKAGE = "defaultPackage/LATEST/ChangeSet.xml";

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