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Modernizing Oracle Tuxedo Applications with Python

You're reading from   Modernizing Oracle Tuxedo Applications with Python A practical guide to using Oracle Tuxedo in the 21st century

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Product type Paperback
Published in Mar 2021
Publisher Packt
ISBN-13 9781801070584
Length 202 pages
Edition 1st Edition
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Author (1):
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Aivars Kalvans Aivars Kalvans
Author Profile Icon Aivars Kalvans
Aivars Kalvans
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Table of Contents (18) Chapters Close

Preface 1. Section 1: The Basics
2. Chapter 1: Introduction and Installing Tuxedo FREE CHAPTER 3. Chapter 2: Building Your First Tuxedo Application 4. Chapter 3: Tuxedo in Detail 5. Chapter 4: Understanding Typed Buffers 6. Section 2: The Good Bits
7. Chapter 5: Developing Servers and Clients 8. Chapter 6: Administering the Application Using MIBs 9. Chapter 7: Distributed Transactions 10. Chapter 8: Using Tuxedo Message Queue 11. Chapter 9: Working with Oracle Database 12. Section 3: Integrations
13. Chapter 10: Accessing the Tuxedo Application 14. Chapter 11: Consuming External Services in Tuxedo 15. Chapter 12: Modernizing the Tuxedo Applications 16. Assessments 17. Other Books You May Enjoy

Introducing services and load balancing

Unlike other messaging-oriented middlewares that operate with queues, Tuxedo operates with another abstraction level on top of that – a service. A service may be backed by one or more queues and multiple services may use the same queue. The mapping between service names and queues is stored in the Bulletin Board. The client uses this mapping information and chooses the appropriate queue and tells the kernel which queue to use for a request, as shown in the following diagram. No mapping is required for the response queue as the client tells the server exactly which queue to use for the response:

Figure 3.5 – A service

There are a couple of ways in which the service abstraction over queues can be used, so let's explore them in detail.

Exploring the MSSQ configuration

MSSQ stands for Multiple Servers Single Queue. In modern terminology, we would say that a queue has multiple consumers. Instead of...

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