SNAX/APC Application Programming Manual

SNAX/APC Application Programming Manual—138786

4-1

Application Prototype Simulator

This section describes the SNAX/APC Application Prototype Simulator (APS) and

provides the following information:

•

An overview of APS and how to use it

•

Information on how to set up and run APS

•

Descriptions of the SNAX/APC verbs that APS supports

•

Descriptions of the utility functions available in APS

APS Overview

APS is a program that enables you to submit verbs to SNAX/APC interactively, and

thus carry on a conversation with a partner TP. This can be useful to test proposed

sequences of verbs for conversations with partner TPs. APS also is an excellent tool for

learning how to use the SNAX/APC verbs. It enables you to observe the operation of

the verbs without having to write any programs.

APS is not itself a TP. Rather, you, the person operating APS, are the TP: you decide

which verbs to execute and when, what data to send, how to respond to errors, and so on.

You provide the logic of the TP by the choices you make. APS merely provides the

method to execute the SNAX/APC verbs without you having to write a TP.

APS allows the user to simulate a TP issuing either mapped or basic verbs. APS

determines which verb set to use by interpreting the value in the conversation type field

of the last TP-READY verb issued. Only verbs from that set may then be issued for the

duration of the conversation, and until another TP-READY verb is issued that specifies a

different verb set.

Users should note that APS supports IPC version code S3 verbs only. See the

subsection, “Setting Up and Running APS,” for more details.

APS is a Pathway application requester written in SCREEN COBOL, and its ability to

run at D-series high process identification numbers (PINs) is dependent on its control

programs. APS can run at high PINs if it is run under the D-series Pathway (or NonStop

TS/MP and Pathway/TS) and Enable software. More detail on high PIN support can be

found in the SNAX/APC Planning and Configuration Manual.