The CICS Transaction Gateway (CICS TG) is widely used to provide access to CICS COMMAREA-based programs and 3270 transactions from Java environments. This IBM Redbooks publication shows you how to build a robust CICS TG configuration for a variety of different configurations.

First we introduce the facilities of the CICS TG, followed by step-by-step explanations of how to use the different protocols (TCP/IP, TCP62, APPC and EXCI) used for communication with a CICS TS V2.2 region on z/OS, and how to secure your CICS region when receiving External Call Interface (ECI) or External Presentation Interface (EPI) requests.

Next, we provide details on how to configure the CICS TG V5 on either z/OS or Linux to connect a Java client application to a CICS region. The use of the Secure Sockets Layer (SSL) protocol to encrypt the communication from the Java application to the CICS TG is included in these scenarios.

Finally, we offer two scenarios to illustrate how to configure WebSphere Application Server V4 on the Windows or z/OS platforms, to use the supplied ECI resource adapter to allow J2EE applications to make ECI calls to CICS.

Part 1 Introduction

Chapter 1. CICS Transaction Gateway

Part 2 Configuring CICS connections

Chapter 2. APPC connections to CICS

Chapter 3. TCP62 connections to CICS

Chapter 4. EXCI connections to CICS

Chapter 5. TCP/IP connections to CICS

Chapter 6. CICS TG security scenarios

Part 3 Gateway daemon scenarios

Chapter 7. TCP connections to the Gateway daemon on z/OS

Chapter 8. SSL connections to the Gateway daemon on z/OS

Chapter 9. TCP connections to the Gateway daemon on Linux

Part 4 WebSphere scenarios

Chapter 10. CICS TG and WebSphere Application Server for z/OS

Chapter 11. CICS TG and WebSphere Application Server for Windows

Part 5 Appendixes

Appendix A. DFHCNV and CICS data conversion

Appendix B. Sample applications

Appendix C. Additional material