Designing and Programming CICS Applications

Chapter 7. Programming the CICS Java Component

In this chapter:

• Tools

• Setting Up Your Development Environment

• Creating and Compiling the IDL Definition

• Writing the Server Implementation Class

• Exporting and Binding the Server Application to the CICS Region

• Creating the CORBA Client

• What’s Next…

In this chapter you will be using VisualAge for Java Enterprise Edition to develop the CICS Java component together with the Enterprise Toolkit/390 (ET/390) that comes with it. The procedure is based on VisualAge for Java Version 2. The panels and screens in Version 3 are different.

Before you can complete the procedure in this chapter you need to install the COBOL application and have all the definitions outlined in Appendix A set up.

The IIOP client/server programming model starts with interface definitions. Here are the steps for developing a CORBA application:

• Write a definition for each object using IDL.

• Compile the IDL code using an IDL-to-Java compiler to produce server skeleton code and client stub code.

• Create and add the Java implementation classes.

• Build the server application (Export and bind to a CICS region).

• Build the client application.

Tools

The main tool detailed in this chapter is VisualAge for Java for Windows NT, Enterprise Edition, which is an end-to-end Java application development tool that lets you develop Java code on the workstation and deploy it on OS/390. It provides a comprehensive Integrated Development Environment (IDE) that supports browsing, editing, compiling, testing, debugging, ...