PunchOutSetupRequest Handler
PunchOutSetupRequest handler services interact with shopping systems to:
Initialize a shopping session.
Return a unique catalogURL where the buyer should begin to browse.
Possibly store metadata related to the punchout process.
Any services that interact with the catalog system to retrieve such information must be cluster safe, and they depend on the underlying catalog system.
Any Integration Server service that the catalog system must invoke to construct the catalogURL, as well as the PunchOutOrderMessage, must also be cluster safe (this is easily achieved if these services do not depend on state information stored on Integration Server).