[jboss-user] [JBoss jBPM] - SEAM/jBPM Synchronization

[jayzaw]

Hi,

we intend to separate page-flow from process-flow in our application. 

This means:
a) to every activity/task in a business process, there is a set of pages assigned, within which there is pageflow. One such set of pages is assigned to one and exactly one activity/task in a business process. (there are exceptions, like the login page, and the page in which you can chose to trigger one of several business processes at your disposal as a user)

b) the "web rendering" tier (where pageflow takes place, and we will use SEAM here) does basically NOT know about the business process (loose coupling). All it knows is :
- which activity/task is performed right now, while the current pageset is active
- at the end of the dialogue for the activity, it tells jBPM to resume the business process instance. jBPM would then either acknowledge the resume of the business process, or signal a fault in case the submit of the activity to jBPM has somehow failed. In case jBPM would signal a success, it would tell to the "web rendering" tier what the next activity is. That way, the web tier would know what the next set of pages is to load. 

This is the loosest coupling I can imagine between page- and process-flow. The question is: is it feasible that way, and where do I find material/infos on it ? How would the synchronization take place ? 

How would the user interface controller be notified of the next activity in the business process, without having knowledge of the whole business process ? 

How would the jBPM tell the user interface controller that the successful completion of an activity has failed and that it must be restarted ? (meaning, e.g. that a user would have to correct some values submitted and resume the business process again)

Kind regards,

Jay

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