1. Mainframe Adapter for SNA Reference Guide
  2. Application-to-Application Programming Examples
  3. Distributed Transaction Processing (DTP) Examples
  4. ATMI Conversational Client to CICS/ESA DTP, Server Gets Control

2.2.4 ATMI Conversational Client to CICS/ESA DTP, Server Gets Control

Figure 2-13 DMCONFIG File Entry


DMCONFIG File Entry

  1. ATMI client invokes toupsrv service.
  2. The toupsrv service issues tpconnect for SIMPDTP, which is advertised in the DM_REMOTE_SERVICES section of DMCONFIG file. The TPRECVONLY flag indicates the server gets control and the first conversation verb toupsrv can issue is tprecv. Data is sent on the tpconnect in the idata buffer.
  3. User transaction DTPS starts TOUPDTPS program.
  4. It is recommended you save the EIBTRMID to a program variable. This value may be used to identify the specific conversation on your CICS/ESA APPC verbs.
  5. The EXEC CICS RECEIVE command receives the idata buffer contents for processing.
  6. The TOUPDTPS program processes data.
  7. The EXEC CICS SEND command returns the OUT-BUFFER contents into the clients tprecv odata buffer. WAIT suspends processing in TOUPDTPS until the data has successfully been received. LAST indicates the conversation is finished and is communicated to the tprecv as TPEV_SVCSUCC.

Parent topic: Distributed Transaction Processing (DTP) Examples