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Using APPC to Communicate with Other Systems › APPC Link Definition Examples › Run Conversations Within the Same Domain

Run Conversations Within the Same Domain

The two LUs of an APPC conversation are run in the same domain to develop a database query application and test it. No sessions are established, no session related definitions are needed, and session overheads are eliminated. Only the TCT entry needs to be defined, with the name of the local domain as the destination LU.

To define an APPC link within the same domain, SYSA

  1. Define the following TCT entry in SYSA: 
    DEFTRANS TRANSID=DBQUERY TPN=DB01 LU=SYSA PROC=DBQRY01
  2. Issue an allocation request from an NCL procedure in SYSA for DBQUERY.

The allocation processing locates the TCT entry and determines that the destination is the local domain. This has the effect of starting DBQRY01 in SYSA. During this processing there is no need to reference any of the session related tables DLT, OSCT or MCT.