Book Image

Microservices Communication in .NET Using gRPC

By : Fiodar Sazanavets
Book Image

Microservices Communication in .NET Using gRPC

By: Fiodar Sazanavets

Overview of this book

Explore gRPC's capabilities for faster communication between your microservices using the HTTP/2 protocol in this practical guide that shows you how to implement gRPC on the .NET platform. gRPC is one of the most efficient protocols for communication between microservices that is also relatively easy to implement. However, its official documentation is often fragmented and.NET developers might find it difficult to recognize the best way to map between C# data types and fields in gRPC messages. This book will address these concerns and much more. Starting with the fundamentals of gRPC, you'll discover how to use it inside .NET apps. You’ll explore best practices for performance and focus on scaling a gRPC app. Once you're familiar with the inner workings of the different call types that gRPC supports, you'll advance to learning how to secure your gRPC endpoints by applying authentication and authorization. With detailed explanations, this gRPC .NET book will show you how the Protobuf protocol allows you to send messages efficiently by including only the necessary data. You'll never get confused again while translating between C# data types and the ones available in Protobuf. By the end of the book, you’ll have gained practical gRPC knowledge and be able to use it in .NET apps to enable direct communication between microservices.
Table of Contents (17 chapters)
1
Section 1: Basics of gRPC on .NET
5
Section 2: Best Practices of Using gRPC
9
Section 3: In-Depth Look at gRPC on .NET

How to deprecate old, unused fields in gRPC

To prevent anyone from inserting fields into proto files with the same sequence numbers as the ones of the fields that have been removed, you can use the reserved keyword. To use it, you just need to place it into your message definition at the same level that you put your fields in.

To specify the field sequence numbers that you don't want anyone to use, you just place them after the reserved keyword. If you need to specify multiple sequence numbers, you just separate them by a comma. Otherwise, you can specify a sequential range by using the to keyword. For example, if you use 6 to 12, all sequence numbers starting from 6 and ending with 12 will be unavailable. If you try to use them, you will receive an error when trying to generate code from the proto file.

There is also another way that you can use the reserved keyword. Instead of specifying field sequence numbers, you can specify field names. If you do so, you will not be...