Transitioning: Informix 4GL to Enterprise Generation Language (EGL)

An IBM Redbooks publication

Note: This is publication is now archived. For reference only.

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Published on July 22, 2005, updated August 03, 2005

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ISBN-10: 0738491055
ISBN-13: 9780738491059
IBM Form #: SG24-6673-00


Authors: Chuck Ballard, Vlaunir Da Silva, Daniel M. Farrell, Alexander Koerner and Jonathan Sayles

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    Abstract

    In this IBM Redbooks publication, we describe how Informix customers can upgrade their 4GL application development environment to the Rational Software Development platform, and, more specifically, transition to the Rational Enterprise Generation Language (EGL).

    EGL provides just the right balance of simplicity and flexibility, and enables application developers to focus on solving business problems rather than expending time and energy on technology.

    For example, Informix 4GL developers who are unfamiliar with Java can use EGL to quickly build data-driven Web applications and business logic. They can then write and debug their applications in EGL, and the Java code will be generated for them. So they can then build dynamic Web applications without having to learn the Java language. This provides significant advantages, enabling clients to minimize application development time and resource requirements.

    We give you an overview of EGL, its concepts and operations, and walk you through a step-by-step tutorial to develop an simple Web application. Included is an overview of the 4GL to EGL migration process and a sample application migration. You will be alerted to potential migration issues, and given the information to resolve them.

    We also include guidance for working with special database behavior and requirements, JasperReports, and a number of advanced EGL topics for developing robust and individualized applications.

    Table of Contents

    Part 1. Introduction and overview

    Chapter 1. Introduction

    Chapter 2. IBM Informix 4GL

    Chapter 3. Rational Software Development Platform

    Chapter 4. Installing and configuring RAD

    Chapter 5. Redbook 4GL reference application

    Part 2. EGL basics and a simple EGL Web application

    Chapter 6. Introduction to IBM EGL

    Chapter 7. EGL language concepts

    Chapter 8. The EGL build environment

    Chapter 9. Simple Web application setup

    Chapter 10. Simple Web application

    Part 3. Informix 4GL to EGL conversion

    Chapter 11. The 4GL to EGL conversion process

    Chapter 12. Converting the redbook sample 4GL application to EGL

    Chapter 13. Special conversion topics

    Chapter 14. How to deploy an EGL Batch or CUI application

    Chapter 15. EGL and IDS database server

    Chapter 16. EGL and JasperReports

    Chapter 17. Changing database server in the EGL application

    Part 4. From character based to Web / advanced EGL

    Chapter 18. Web enhancements to the Example_01 application

    Chapter 19. How to enhance the converted 4GL application

    Chapter 20. How to deploy an EGL Web application

    Chapter 21. Additional EGL features

    Appendix A. 4GL/EGL syntax comparison

    Appendix B. EGL functions for database developers

    Appendix C. EGL and Cloudscape

    Appendix D. Additional material

     

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