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

Chapter 8: Using Tuxedo Message Queue

As you know by now, Tuxedo uses System V IPC message queues for inter-process communication. Not only are those queues not persistent but their content can also be lost during a system restart. Tuxedo also uses at-most-once delivery semantics. So then, how can one build a reliable system with these tools? The answer to this is to use persistence for some of the messages and application parts.

Tuxedo comes with a queueing component called /Q included. Among other features, it supports queues persisted to the file system. Oracle also offers a paid add-on called Oracle Tuxedo Message Queue (OTMQ) with even more features. However, in this book, we will cover only /Q because every Tuxedo application has this component and it is sufficient for most tasks. For more advanced features and better integration, we will be using a open source messaging framework in Chapter 12, Modernizing the Tuxedo Application.

In this chapter, we will cover the following...