Introduction to Pathmaker

Contents
067867Tandem Computers Incorporated v
About This Manual xi
About the Pathmaker Manual Set xiii
Section 1 Introduction to Pathmaker and Pathway
Overview of Pathmaker 1-1
Benefits of Using Pathmaker 1-1
How Pathmaker is Used 1-2
Online Transaction Processing (OLTP) Applications 1-4
Functions Performed by OLTP Applications 1-6
Requirements of Online Transaction Processing 1-8
Overview of Pathway 1-9
Benefits of Using Pathway 1-9
How Pathway is Used 1-10
Creating Applications Without Pathway 1-10
Creating Applications With Pathway 1-11
Requester Functions 1-13
Server Functions 1-13
Benefits of Using Requesters and Servers 1-14
Service Functions 1-14
Benefits of Using Services 1-14
Communication With IPC Messages 1-16
Request Messages 1-16
Reply Messages 1-16
Running Applications With Pathway 1-18
Process 1-18
PATHMON 1-18
PATHCOM 1-18
SCREEN COBOL Library 1-18
TCP (Terminal Control Process) 1-18
Database 1-19
Service 1-19
Server Process 1-19
Server Class 1-21
Context-Free Services 1-22