2.4.1 Implicit Attachment of TRANSID (Outbound Requests Only)

Figure 2-34 Implicit Attachment of TRANSID (Outbound Requests Only)

The following list describes the process for implicit attachment as illustrated in the figure above:

1. The ATMI service makes a request to the service TRN1DATA, which is advertised as a remote service in the DMCONFIG file. It is a DPL request to a program named SVC1 in the CICS/ESA region.
2. The first four characters of the remote service tag name (TRN1) are extracted and passed to the CICS/ESA region as the invoking TRANSID. No CICS/ESA resource definition for the TRANSID is required in the region.
3. The mirror transaction CSMI is attached in the CICS/ESA region, starting the mirror program DFHMIRS. The program performs the DTP requests for the service.
4. The mirror program now attaches the invoking TRANSID (TRN1) and then invokes the application service program SVC1.The program can interrogate the EIBTRNID field to find this value.