CICS Transaction Gateway

The following components are required to run a CICS application using CTG and Enterprise Server:

• Your client program. You can build and run the client program under Net Express.
• Middleware. Messages and data are passed between the server and client components using middleware. MSS supports the middleware products, IBM CICS Transaction Gateway® ECI Version 1 calls and IBM Universal Client® Version 3.0. This middleware software must be installed on the same machine as your client program.
• Enterprise Server.
• Your CICS programs. You deploy these to the machine where Enterprise Server with MSS is installed.

Net Express and Enterprise Server can be on the same or different machines.

This chapter uses CTG to mean IBM CICS Transaction Gateway or IBM Universal Client.

You use CTG as the middleware between your client program and the CICS application running on Enterprise Server.

To enable support for CTG, you need to set up both the client and server software. You need to:

1. Configure the IBM CTG client and tell it which machine the server program is running on.
2. Prepare your client program, by inserting ECI calls to the CTG in your program.
3. Compile your CICS server program.
4. Configure the enterprise server that will run the CICS server program. Among other things, this involves enabling an enterprise server for MSS .
5. Add an enterprise server listener for CICS requests.