This is a simple example of how to use gRPC in Java. The example is a simple client-server application where the client sends a request to the server and the server responds with a message.

gRPC supports four types of communication patterns:

The client sends a single request to the server and gets a single response back.

The client sends a single request to the server and gets a stream of responses back.

The client sends a stream of requests to the server and gets a single response back.

The client sends a stream of requests to the server and gets a stream of responses back.