Summary

In this chapter, we explored the fundamentals of gRPC services and clients. We discussed the field types that are used in protobuf, including the scalar types and some other types such as DateTime, enum, repeated fields, and map fields. Then, we learned about four types of gRPC services: unary, server streaming, client streaming, and bidirectional streaming. We explored how to implement each type of gRPC service and how to create a gRPC client to consume the gRPC service. Additionally, we demonstrated how to use the AddGrpcClient() method to register a gRPC client in the DI container of an ASP.NET Core application and how to use the gRPC client to consume a unary gRPC service. Finally, we discussed how to update the proto files and how to handle the changes in the server and the client.

To simplify the code samples, we did not use any database access code in the gRPC services. In a real-world application, we may need to interact with a database or other external services...