Pathway/iTS Web Client Programming Manual (G06.24+)

Compaq NonStop Pathway/iTS Web Client Programming Manual—520270-001

1-1

Introduction to Pathway/iTS Web

Clients

The web client feature of Compaq NonStop™ Pathway/iTS lets you convert a SCREEN

COBOL application (a group of related compiled program units within an object library)

to a web client and then build and deploy the resulting client in a Pathway environment.

The converted web client consists of a combination of Java code and HTML pages.

These can be deployed on any web server hosted on the Compaq NonStop™ Kernel

operating system. The Java client, working with a standard web browser, communicates

with existing Pathway servers by means of router processes, a run-time web gateway,

and the terminal control process (TCP).

Any valid block-mode requester programs for terminal types T16-6520, T16-6530,

T16-6540, and IBM-3270 can be converted. (Intelligent device support (IDS) requesters

cannot be converted.) The specified program units are converted in such a way that

most of the functionality of the original SCREEN COBOL program remains unchanged.

The conversion feature allows you to maintain the same SCREEN COBOL source code

for both terminals and web clients. Thus you can migrate terminals to the web

gradually. Alternatively, you can fully migrate your terminal requesters to the web and

then use standard web publishing tools to modify and enhance the Java code and the

HTML presentation.

You can configure and manage Pathway applications containing converted web clients

by using either Compaq NonStop™ Pathway/XM or PATHCOM. However, Compaq

recommends using Pathway/XM for this purpose; Pathway/XM provides fuller and

easier-to-use management capabilities for web client configurations, including

configuration and management of router processes. Information about configuring and

managing Pathway/iTS web clients through Pathway/XM is provided in the

Pathway/XM System Management Manual. Information about configuring and

managing Pathway/iTS web clients through PATHCOM is given in the Pathway/iTS

System Management Manual.

Development Process for Web Clients

The process of creating a Pathway/iTS web client is shown in Figure 1-1.

To convert a SCREEN COBOL object program to a web client, you invoke the

Pathway/iTS converter utility through the CONVERT command in the SCREEN

COBOL Utility Program (SCUP). The converter scans the compiled SCREEN COBOL

object code and generates an equivalent web client.