Pathmaker Programming Guide

5 Creating Requesters
067868 Tandem Computers Incorporated 5–1
This section presents an overview of requester development and provides detailed
information about using the Pathmaker full screen interface to create requesters. A
Pathmaker requester can be created using either PMADL or the full screen interface.
No matter which tool you use, you need to be familiar with the types of information
that must be provided to create a Pathmaker requester. This section provides that
information.
Requester
Development Overview
The steps for developing a requester using the Pathmaker product are very similar
whether you are creating a DB requester application or a custom application. These
steps fall into four main areas:
Defining the requester and its screen
Modifying the default screen (optional)
Coordinating IPC messages and parameters
Generating and compiling SCREEN COBOL source code
Defining the Requester and
Its Screen
During requester development, an application developer uses Pathmaker screens to
record information about the requester and its screen. The information recorded
includes:
Requester attributes:
Requester name
Requester type (DB, TRNS, MENU, REG)
End-user’s terminal type
Requester context
Parameters this requester expects to receive
Function keys that are used
Names of services that can be invoked for this requester
Names of other requesters that can be called from this requester
Note Context is the set of all data fields, records, and tables that this requester will use.
Screen Attributes
Screen title
Function keys that should appear on the screen and how each should be
labeled
The subset of the context that should appear on the screen as entry or display
data fields and their physical arrangement
The text that should be displayed on the end-user’s help screen