Number ranges

Every outgoing interchange and every message inside it carries a sequential reference number. The partner’s acknowledgement is matched to the right exchange through these numbers – which is why no number may be issued twice.

What is this for?

• Maintain sequential references per tenant and partner.
• Keep separate counters for the interchange and the individual message.
• Rule out duplicate numbers even when several jobs run at the same time.

How to set it up

1. There are two counters per tenant and partner: one for the interchange and one for the message.
2. On dispatch the next value is drawn; increment and read happen in one transaction.
3. This is not a side detail: without that bracket, timer jobs running in parallel in the NCS-Webservice would issue the same number.
4. The last value issued can be inspected – useful when a partner queries a specific reference.