[jbpm-dev] [Design of JBoss jBPM] - Re: introducing process instance ?

"jbarrez" wrote : But I don't agree that the ProcessInstance should be an interface. | Why not make it an extension of the ExecutionImpl? After all, the ProcessInstance is just another name of a very specific execution (ie the root execution). You could add some specifc stuff to the process instance (eg business key? as it was in jbpm3 or getAllWaitStates()) | the ProcessInstance interface that I propose is in the api. i can't make the same distinction in the implementation classes. but the api user will not notice that. suppose that we have class ProcessInstanceImpl extends ExecutionImpl { | ... | } in the implementation. And then suppose that jPDL wants to add a property to all executions... then you end up in multiple inheritence. and besides, i think it is best that all executions (incl process instances) are stored in only 1 single table. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4225852#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...