Book Image

Modernizing Oracle Tuxedo Applications with Python

By : Aivars Kalvans
Book Image

Modernizing Oracle Tuxedo Applications with Python

By: Aivars Kalvans

Overview of this book

Despite being developed in the 1980s, Oracle Tuxedo still runs a significant part of critical infrastructure and is not going away any time soon. Modernizing Oracle Tuxedo Applications with Python will help you get to grips with the most important Tuxedo concepts by writing Python code. The book starts with an introduction to Oracle Tuxedo and guides you in installing its latest version and Python bindings for Tuxedo on Linux. You'll then learn how to build your first server and client, configure Tuxedo, and start running an application. As you advance, you'll understand load balancing and work with the BBL server, which is at the heart of a Tuxedo application. This Tuxedo book will also cover Boolean expressions and different ways to export Tuxedo buffers for storage and transmission, before showing you how to implement servers and clients and use the management information base to change the configuration dynamically. Once you've learned how to configure Tuxedo for transactions and control them in application code, you'll discover how to use the store-and-forward functionality to reach destinations and use an Oracle database from a Tuxedo application. By the end of this Oracle Tuxedo book, you'll be able to perform common Tuxedo programming tasks with Python and integrate Tuxedo applications with other parts of modern infrastructure.
Table of Contents (18 chapters)
1
Section 1: The Basics
6
Section 2: The Good Bits
12
Section 3: Integrations

Using FML32 typed buffers

FML stands for Field Manipulation Language. Do not be confused by the language part, FML is a data structure containing field identifiers and field values in a flat, contiguous memory block. It is similar to a multimap or multidict in other programming languages where more than one value may be associated with a given key. It also supports many different value types in the same data structure including FML32 containing other FML32 buffers. FML is an older data structure that supports 16-bit long identifiers, number of fields, and value lengths. FML32 raises those limits and 32 bytes are used for field identifiers, number of fields, and value lengths. All modern applications should use FML32.

If my words are not enough, another reason in favor of FML32 is that it is used by Tuxedo internally:

  • Management services and APIs work with the FML32 type.
  • Request metadata uses FML32.
  • Jolt and other features use and support FML32.
  • Tuxedo comes...