How JBPM Interrogate the process definition "evaluation.bpmn"

[sadiroveski]

Dear all,

I want to know how the JBPM interrogate the process definition. We design the process and save in a .bpmn file in the classpath. Then, use the following code

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KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();

                    kbuilder.add(ResourceFactory.newClassPathResource("Evaluation.bpmn"), ResourceType.BPMN2);

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1-The engine will look to the classpath for "Evaluation.bpmn". what next?

2-Does the engine look to "Evaluation.bpmn" every time a new process initiated by a user??

3- How the engine knows what task is next in a runtime process instance, by using the "Evaluation.bpmn" file or by looking into the database (if yes which field) or somewhere else??

Your help by answering the 3 questions above is highly appreciated.

Thanks,

[swiderski.maciej]

take a look here, it should give you aswers to the questions.

HTH

[sadiroveski]

Thanks Maciej,

Actually, it gives me part of the answer. After creating the knowledge base and load the process definition into memory, they mentioned that "This knowledge base is used to look up the process definitions whenever necessary."

What do they mean by "Whenever necessary"?

The engine will look at the process sequence in memory, how it will know that the process is changed in the filesystem?

Thanks in advance,