Are you talking about jBPM5?
Yes there is. For Action Handlers you have the concept of WorkItem, That will represent a node inside your process. Unfortunately, the BPMN2 specification doesn't define hook points to onEntry and OnExit actions. Luckly the jBPM5 team has implemented the following extensions:
https://github.com/droolsjbpm/jbpm/blob/master/jbpm-bpmn2/src/test/resources/BPMN2-OnEntryExitScriptProcess.bpmn2
Cheers