Designing gRPC Services

In this tutorial, you’ll design a simple gRPC service with Goa. While Goa is often used for REST endpoints, it also has first-class support for gRPC transports. You’ll see how to:

• Define a service and methods in the Goa DSL.
• Annotate them for gRPC, ensuring the generated code produces .proto files.
• Validate payloads and map errors to gRPC status codes.

What We’ll Build

We’ll create a greeter service that has a single method called SayHello. The method receives a name in the payload and returns a greeting message. We’ll also show how to qualify gRPC responses with standard gRPC codes.