define external? Remote EJB? afaik, the spring integration has something and jBPM 4.4 will support CDI
I suppose I am asking about a general solution where I can inject any arbitrary object into jbpm for use in the JUEL expressions.
In my specific case, I have a Spring application, but I am not using Spring to configure jBPM (I am planning on getting a reference to the process engine via JNDI lookup).