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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

Creating and configuring queues

Messages are stored in a queue that belongs to a queue space that resides in a device. Just like the transaction log, a queue device is just a file of a preallocated size and with a special format. First, we start the configuring by specifying a file that will contain the device:

export QMCONFIG=`pwd`/qmconfig

This environment variable is needed for qmadmin to work on the specified device.

Next, we create the actual device using the qmadmin tool and specify the device offset and a size of 200 blocks:

echo "crdl $QMCONFIG 0 200" | qmadmin

After that, we can create a queue space that will contain all of our queues. There are several parameters for queue space creation and you can find more information about them in the Tuxedo documentation. We will create our queue space with the following command:

echo "qspc QSPACE 230458 100 3 5 5 100 ERR y 16" | qmadmin

This command creates a queue space with the following parameters...

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