[jboss-user] [JBoss jBPM] - Re: How can i get inform about running tokens/processes.

[exe]

I think I solved my problem. The problem was i misunderstood the bpm concept. I don't want to steal your time but  I explain my problem maybe it can help for somebody.

I explain the bussines logic of my bpm:

We have some bussines function implamented as a stateless session bean. 
I'll develop a custom action for every ejb invoke i call this node type with ejbInvoke node. The node invoke the EJB and if the invoke is succes signaling the Token to jump the next node.

 I dont want to implement indentity I'll delegate the authorization information for the ejb layer. When somebody wants to start a process send a message with ProcessDef  and his Identity. 

The MessageDriven bean is listening on the queue. when a message received the MDB create a jbpmContext put the USER object into the jbpmContext and starts the process. Every "ejbInvoke" node call an ejb method with an USER in the parameter list (gets from the process context).  If the EJB invocation falls with security exception the EjbInvoke node will not resume the execution (now our process is in waiting state on the EjbInvoke node) save the process instance and the MDB will be destroyed.  

A different user can get a list with the processes wich are in waiting state and he can resume the process with his own USER objects. (send a message to the mdb with the USER objects and process id. The mdb will overwrite the user in the process Context with the the new USEER object and resume the process ).

If the B user tries to resume the process wich is already resumed  by user A but the new state isn't persisted because the node isn't finished. The A user's mdb will get a Hibernate exception. 


Now I think i found a solutions: The user cannot signaling directly the process execution.  When i catch the security exception i insert a "resume process 112" task. The users can get only the task lists not the process instance list and he can complete the task with a resume message, when the user sends a resume message i set the task to complete  persist the task state and AFTER resume the process execution from the custome task action. When the b user tries to complete the "resume process 112" he will get a message "the process already started" and a task will disappear from his tasklist because somebody else set to complete the task. 

thx,

Janos








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