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Modernizing Oracle Tuxedo Applications with Python

Modernizing Oracle Tuxedo Applications with Python

By : Kalvans
4.8 (8)
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Modernizing Oracle Tuxedo Applications with Python

Modernizing Oracle Tuxedo Applications with Python

4.8 (8)
By: 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)
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1
Section 1: The Basics
6
Section 2: The Good Bits
12
Section 3: Integrations

Learning what BBL is

Before diving into a more specific topic, we should demystify the BBL process. Tuxedo uses all three System V interprocess communication mechanisms: message queues as a transport mechanism, semaphores for synchronization, and shared memory for keeping application configuration and dynamic information about the state of the application.

The shared memory region is called the Bulletin Board and the administration process that runs in each Tuxedo application is called the Bulletin Board Liaison (BBL). Because the Tuxedo application consists of many Unix processes starting, working, stopping, and sometimes crashing at different moments in time, it is important to keep the Bulletin Board up to date and ensure consistency despite misbehaving clients and servers.

Monitoring server processes and restarting them as needed is one of several tasks assigned to the BBL process. To investigate, we start with the Tuxedo application developed in the previous chapter and...

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