For an MDB (DB queue), different transactions are used between the service requester and the HCSC server, and between the service adapter and a service component.

Extraction of the message from the local queue by standard reception (MDB (DB queue)), and transmission of the message to the transmit queue by the service adapter are processed in one transaction. The transaction process is the same as that for an MDB (WS-R).

For persistent business processes, see the description of the transactions during execution of business processes in 3.4 Transaction of a business process.