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Protocol Buffers Handbook

Protocol Buffers Handbook

By : Clément Jean
5 (2)
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Protocol Buffers Handbook

Protocol Buffers Handbook

5 (2)
By: Clément Jean

Overview of this book

Explore how Protocol Buffers (Protobuf) serialize structured data and provides a language-neutral, platform-neutral, and extensible solution. With this guide to mastering Protobuf, you'll build your skills to effectively serialize, transmit, and manage data across diverse platforms and languages. This book will help you enter the world of Protocol Buffers by unraveling the intricate nuances of Protobuf syntax and showing you how to define complex data structures. As you progress, you’ll learn schema evolution, ensuring seamless compatibility as your projects evolve. The book also covers advanced topics such as custom options and plugins, allowing you to tailor validation processes to your specific requirements. You’ll understand how to automate project builds using cutting-edge tools such as Buf and Bazel, streamlining your development workflow. With hands-on projects in Go and Python programming, you’ll learn how to practically apply Protobuf concepts. Later chapters will show you how to integrate data interchange capabilities across different programming languages, enabling efficient collaboration and system interoperability. By the end of this book, you’ll have a solid understanding of Protobuf internals, enabling you to discern when and how to use and redefine your approach to data serialization.
Table of Contents (13 chapters)
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User-defined types

enum

You are certainly already familiar with enums in your favorite language, and they are pretty much the same in Protobuf. When we know all the possible values of a type, we use enums to create a lightweight representation of each value:

EBNF – Enum syntax

enumValueOption = optionName "=" constant
enumField = ident "=" [ "-" ] intLit [ "[" enumValueOption { ","  enumValueOption } "]" ]";"
enumBody = "{" { option | enumField | reserved } "}"
enum = "enum" ident enumBody

As such, an enum in Protobuf looks like the following:

enum PhoneType {
  PHONE_TYPE_MOBILE = 0;
  PHONE_TYPE_HOME = 1;
  //...
}

You can see that we are adding the name of the enum (in UPPER_SNAKE_CASE) as the prefix of each value, and then we have this magic number following the equal sign. The naming is purely done according to convention...

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