SNAX/HLS Application Programming Manual

6 Application Prototyping and
Simulation (APS) System
104707 Tandem Computers Incorporated 6–1
This section describes the SNAX/HLS Application Prototyping and Simulation (APS)
system. APS is a SCOBOLX requester that presents one screen per SNAX/HLS verb
request. Verb requests are selected by function key. The APS user selects the verb to
be executed, fills in the verb indicators, directs APS to send the verb to a SNAX/HLS
process, and views the result.
Using APS, SNAX/HLS application programmers can interactively execute verb
requests and immediately view verb replies. An application design can be prototyped
in a matter of minutes without writing any code. Situations such as error recovery,
message contention, and verb execution behavior can be easily simulated using APS.
APS also serves as an educational tool. Programmers unfamiliar with SNAX/HLS can
be shown verb dynamics in a few hours of instruction.
Figure 6-1 shows a sample APS environment. The figure is described in detail below.
Figure 6-1. APS Environment
\SYS1 \SYS2
Tandem NonStop System Tandem
NonStop 1+
or
APS SCOBOLX PGM NonStop
System
Pathway TCP
Expand Pathway TCP
APS SCOBOLX
PGM
HLS HLSCOM
$SNAP $SNAT
SNA Devices SNA Applications
(4701) (IMS, CICS)
$SNAP is a primary SNAX/XF line for communicating with IBM devices (for
example, 4701). $SNAT is a secondary SNAX line for communicating with IBM
host software products (for example, IMS). If IBM devices or software products