Using gRPC in Microservices Communication with .Net 5

You will learn how to Build a high-performance gRPC Inter-service Communication between backend microservices with .Net 5 and AspNet 5.

Microservices are modern distributed systems so with gRPC in ASP.NET 5, we will develop high-performance, cross-platform applications for building distributed systems and APIs. It’s an ideal choice for communication between backend microservices, internal network applications, or iot devices and services. With the release of ASP.NET 5, Microsoft has added first-class support for creating gRPC services with Asp.Net 5.

This course will led you get started building, developing and managing gRPC servers and clients on distributed microservices architecture.

Check the overall picture

You can see that we will have 6 microservices which we are going to develop one by one.

We will use Worker Services and Asp.Net 5 Grpc Applications to build client and server gRPC components defining proto service definition contracts.

We will implement realworld e-commerce use case with only gRPC communication. We will have 3 gRPC server applications which are Product — ShoppingCart and Discount gRPC services. And we will have 2 worker services which are Product and ShoppingCart Worker Service. Worker services will be client and perform operations over the gRPC server applications. And we will secure the gRPC services with standalone Identity Server microservices with OAuth 2.0 and JWT token.

ProductGrpc Server Application

First of all, we are going to develop ProductGrpc project. This will be Asp.Net gRPC server web application and expose apis for Product Crud operations.

Product Worker Service

After that, we are going to develop Product Worker Service project for consuming ProductGrpc services. This product worker service project will be the client of ProductGrpc application and generate products and insert bulk product records into Product database by using client streaming gRPC proto services of ProductGrpc application. This operation will be in a time interval and looping as a service application.

ShoppingCartGrpc Server Application

After that, we are going to develop ShoppingCartGrpc project. This will be asp.net gRPC server web application and expose apis for SC and SC items operations. The grpc services will be create sc and add or remove item into sc.

ShoppingCart Worker Service

After that, we are going to develop ShoppingCart Worker Service project for consuming ShoppingCartGrpc services. This ShoppingCart worker service project will be the client of both ProductGrpc and ShoppingCartGrpc application. This worker service will read the products from ProductGrpc and create sc and add product items into sc by using gRPC proto services of ProductGrpc and ShoppingCartGrpc application. This operation will be in a time interval and looping as a service application.

DiscountGrpc Server Application

When adding product item into SC, it will retrieve the discount value and calculate the final price of product. This communication also will be gRPC call with SCGrpc and DiscountGrpc application.

Identity Server

Also, we are going to develop centralized standalone Authentication Server with implementing IdentityServer4 package and the name of microservice is Identity Server.
Identity Server4 is an open source framework which implements OpenId Connect and OAuth2 protocols for .Net Core.
With IdentityServer, we can provide protect our SC gRPC services with OAuth 2.0 and JWT tokens. SC Worker will get the token before send request to SC Grpc server application.

By the end of this course, you will have a practical understanding of how to use gRPC to implement a fast and distributed microservices systems. And Also you’ll learn how to secure protected grpc services with IdentityServer in a microservices architecture.

Is this course for you?

This course is very practical, about 90%+ of the lessons will involve you coding along with me on this project. If you are the type of person who gets the most out of learning by doing, then this course is definitely for you.

Tools you need for this course

In this course all the lessons are demonstrated using Visual Studio 2019 as a code editor. You can of course use any code editor you like and any Operating system you like as long as it's Windows or Mac.