Introduction to Pathmaker

Overview of Pathway
Introduction to Pathmaker and Pathway
1–10 067867 Tandem Computers Incorporated
How Pathway is Used The Pathway product is used for two primary activities:
Creating applications based on the requester-server model
Running requester-server applications
These two activities, and the Pathway components that support them, are explained in
detail in this subsection.
Creating Applications
Without Pathway
Normally, without Pathway, a monolithic application would be developed: one
program that performs all terminal handling, communications, and database
management operations that support transaction processing.
A monolithic application (Figure 1-4) can be very difficult to code and maintain. More
importantly, this type of application can be especially difficult to change as a business
grows and new functions are required by the application. In addition, the
performance of a monolithic application often degrades when more functions and
users are added.
Figure 1-4. Monolithic Application
Terminal Management Operations Database Management Operations
1. Display blank vehicle
registration screen.
2. Accept new vehicle data.
5. Display “Vehicle Added”
on screen.
3. Verify data.
4. Update database with vehicle
data.
Display
Screens
Accept
Commands
and Data
Read
Data
Write
Data
Business
Database
Vehicle
Registration
Application
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