Book Image

Practical gRPC

By : Joshua B. Humphries, David Konsumer, David Muto, Robert Ross, Carles Sistare
Book Image

Practical gRPC

By: Joshua B. Humphries, David Konsumer, David Muto, Robert Ross, Carles Sistare

Overview of this book

While building systems that contain several components, you need a framework that is fast and has minimal network overhead. gRPC is one such open-source tool that is quickly becoming popular and gaining popularity with programmers. Practical gRPC introduces you to gRPC and explains how it compares and contrasts with similar technologies. You’ll be introduced to key technologies such as Protocol Buffers, and work your way up from basic gRPC usage, all the way through to its more advanced capabilities. You’ll learn the best practices for defining and evolving your gRPC APIs, and discover how different tools can be leveraged to get the most out of gRPC and even extend it. By the end of this book, you'll have all the information you need to get started building systems with gRPC.
Table of Contents (13 chapters)
11
11. Extending gRPC services

Nested types

Nested types allow you to define messages inside of other messages.

syntax = "proto2";

message Film {
    message Character {
        string name = 1;
        int64 birth = 2;
    }
    string title = 1;
    string director = 2;
    string producer = 3;
    optional string release_date = 4;
    repeated Character characters = 5;
}

In the example above, if Character needs to be used elsewhere it may be imported as follows:

message OtherFilm {
    repeated Film.Character characters = 1;
}