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Node.js Design Patterns - Third Edition

You're reading from  Node.js Design Patterns - Third Edition

Product type Book
Published in Jul 2020
Publisher Packt
ISBN-13 9781839214110
Pages 664 pages
Edition 3rd Edition
Languages
Authors (2):
Mario Casciaro Mario Casciaro
Profile icon Mario Casciaro
Luciano Mammino Luciano Mammino
Profile icon Luciano Mammino
View More author details

Table of Contents (16) Chapters

Preface 1. The Node.js Platform 2. The Module System 3. Callbacks and Events 4. Asynchronous Control Flow Patterns with Callbacks 5. Asynchronous Control Flow Patterns with Promises and Async/Await 6. Coding with Streams 7. Creational Design Patterns 8. Structural Design Patterns 9. Behavioral Design Patterns 10. Universal JavaScript for Web Applications 11. Advanced Recipes 12. Scalability and Architectural Patterns 13. Messaging and Integration Patterns 14. Other Books You May Enjoy
15. Index

Request/Reply patterns

One-way communications can give us great advantages in terms of parallelism and efficiency, but alone they are not able to solve all our integration and communication problems. Sometimes, a good old request/reply pattern might just be the perfect tool for the job. But, there are situations in which all we have is an asynchronous one-way channel. It's therefore important to know the various patterns and approaches required to build an abstraction that would allow us to exchange messages in a request/reply fashion on top of a one-way channel. That's exactly what we are going to learn next.

Correlation Identifier

The first Request/Reply pattern that we are going to learn is called the Correlation Identifier and it represents the basic block for building a request/reply abstraction on top of a one-way channel.

The pattern involves marking each request with an identifier, which is then attached to the response...

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