126.96.36.199.2 Receive a Message with a Transaction
The message queuing application MUST specify a transaction identifier for a Receive a Message With a Transaction event. If the message queuing application has not previously done so, it MUST enlist the server in a transaction by generating an Enlisting in a Transaction (section 188.8.131.52) event.
The client MUST call the R_StartTransactionalReceive (Opnum 13) (section 184.108.40.206) method and MUST specify the following parameter values:
phContext set to a QUEUE_CONTEXT_HANDLE_NOSERIALIZE (section 220.127.116.11) RPC context handle that has been returned by the server in the pphQueue output parameter of a prior call to the R_OpenQueue (Opnum 2) (section 18.104.22.168) method and that MUST NOT have been previously closed through a call to the R_CloseQueue (Opnum 3) (section 22.214.171.124) method. This value MUST NOT be NULL.
hCursor set to NULL.
ulAction set to the value specified by the message queuing application.
LookupId set to the value specified by the message queuing application.
ulTimeout set to the time-out value specified by the message queuing application.
dwMaxBodySize set to the value specified by the message queuing application.
dwRequestId set to a value that uniquely identifies this call from all other pending calls to this protocol.
pTransactionId set to the transaction identifier specified by the message queuing application.
Let readAck be a DWORD value initialized to RR_ACK (0x00000002).
The client MUST reconstruct the message from the SectionBuffers (section 2.2.6) structure received in the ppPacketSections parameter, as specified in the R_StartTransactionalReceive method. If the message cannot be reconstructed, the client MUST set readAck to RR_NACK (0x00000001).
If the R_StartTransactionalReceive method was invoked with a Receive action type, as specified in the ulAction parameter, then the client MUST advise the server that the message has been received by the client by calling the R_EndTransactionalReceive (Opnum 15) (section 126.96.36.199) method with:
The same phContext parameter as in the call to the R_StartTransactionalReceive method.
dwAck := readAck.
The same dwRequestId parameter as in the call to the R_StartTransactionalReceive method.
If MQ_OK (0x00000000) is returned:
The client MUST return the reconstructed message to the message queuing application.
Else if the return value is not MQ_OK:
The client MUST return the value to the message queuing application.