How can I create a loopback activity

Question

Hello All.
How can I create a loopback process in BPEL? For example: I have a flow that has a human task that submits a proposal. After
this, Theres is another human task that will review this proposal with Approve or Reject options. If it is approved, then the flow goes on. If it is rejected, then the flow has to go back to the proposal subimission process. You can see an image (the first image in the URL) that ilustrates this flow here: http://onbpms.com/2007/02/08/looping-backward/. The rest of the page is not important. Just look at the image to understand my problem. How can implement such loop in BPEL?
I´m using JDeveloper Studio Edition 10.1.3.2.0.4066 and SOA Suite 10.1.3.1.0
Thanks for any help,
Glauco

Answer 1

Yes, I have. This is the instructions that oracle gave me.
There are two approaches:
1) use WHILE bpel activity.
a) Have a variable initially set to N, and loop it till it becomes Y.
b) Inside the loop, you can have the assign activity, and human task call.
c) If the humantask result is Reject,continue the loop again
d) Else, set the variable as Y and end the loop
2) Use scope
For loopback process you can place the process in a scope and make use
of the replay scope method to repeat the scope.
a).Place the assign and UserTask in a single scope.
b) For the Reject condition in the swtich activity , place a throw
activity that throws a remoteFault.
c). Put a catch around the scope to handle the fault thrown by the Reject condition.
d). In this catch place a throw activity, with local part = replay. Choose the remoteFault fault and change de local part to replay
e). This would replay the whole scope when the reject condition is meet.
Both approaches work just fine.
Glauco