Hii All
can anyone help me how to impliment this condition : User Should be able to Cancel the appliaction at any point of time unless its reviwed by HR.
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This question is so broad as to be next to impossible to answer in a useful way.
I personally would tackle this by allowing a "Cancel Application" related action when the `status` of the record equals the appropriate status' (eg. All the status' prior to being reviewed by HR).
EDIT:
With all of these solutions you may also need to consider race conditions and locking the record. Consider what happens to the record if the application is cancelled while HR is reviewing it.
A related action is the way to go. Keep in mind that you might have to cancel active process instances. I suggest to add a "Receive Message" event to these models to gracefully wind down these instances. From the "Cancel" process, send a message to any active process related to the case.