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

Importing and exporting typed buffers

Every buffer type supported by Tuxedo can be imported and exported in the same way. When you are using Python, it does not sound that impressive because it is very easy to either store the Python dictionary itself or convert it to JSON, XML, or any other type. However, C does not come with batteries included and this import and export capability is often used to persist messages in files or a database.

There are two modes for the format of exported data. The first and the default one is a binary representation as the Python bytes type. The second format is a Base64 representation of the same bytes and it has to be explicitly turned on by using the TPEX_STRING flag. While the second format is a bit longer, it is more friendly for logfiles and storing them in a database. Nothing stops you from encoding the binary representation yourself, but using TPEX_STRING is shorter and probably faster as well. The functions for doing imports and exports are...