Mastering Microservices with Java - Third Edition

gRPC framework overview

gRPC is a general-purpose Remote Procedure Call-based framework. It works very well in RPC style, which involves the following steps:

1. You define the service interface by defining the various method signatures, including its parameters and return type.
2. You implement this service interface on the server to allow remote calls.
3. You generate the stub of the service interface and use it in client applications. The client application calls the stub, which is a call to a local object. Then, the stub communicates to the gRPC server and the returned value is passed to the gRPC client. This is shown in the following diagram:

So, the client application just makes a local object (stub) call and gets the response. The server ...