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

[jbarrez]

anonymous wrote : in the implementation.  And then suppose that jPDL wants to add a property to all executions...  then you end up in multiple inheritence.


I understand. 
Extending implementation classes is indeed a no-go when the process instance implementation must be extendable.

So how do you see the inheritance? 


  | ProcessInstance (interface) extends Execution
  | ExecutionImpl implements ProcessInstance, Execution
  | 

-> This could lead to castings of executions to ProcessInstances, which aren't process instances (ie no root execution). But for the compiler, nothing is wrong since they are exactly the same...

I don't know, I get a funy feeling about it when I think about it like that... This leads back to the question if processInstance == Execution? (I know we already discussed this, but perhaps I'm seeing this in the wrong perspective here)

anonymous wrote : 
  | and besides, i think it is best that all executions (incl process instances) are stored in only 1 single table.
  | 

Definitely

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