Ideas - gRPC Service

A basic CRUD service, to explore and explain gRPC.

ideas.proto contains the definition of service

service CoolIdeas {
    rpc SubmitIdea(Idea) returns (IdeaResponse) {}
    rpc GetIdeas(User) returns (Ideas) {}
}

Service struct in service.go satisifies the above interface and can be registerd and run as gRPC Service.

	ideas.RegisterCoolIdeasServer(server, &ideas.Service{}) // file: server/main.go

Client makes request to the server, by creating a client and calling GetIdeas or SubmitIdea

    ideas.NewCoolIdeasClient(conn).GetIdeas(ctx, user) // file: client/client.go

Protobuf

Instead of using JSON to send payload to request, gRPC uses protocol buffers (protobuf), its smaller and performant.

message Idea {
    User user_id = 1;
    string title = 2;
    string description = 3;
}

Requirements

• You should 've go installed, check with go version
• protoc --version to verify protoc installation, along with protoc-gen-go or install it by

brew install protobuf
go get -u github.com/golang/protobuf/protoc-gen-go

Running the Service

• cmd/server dir has server code, cmd/client has the client code.
• Generate the ideas.pb.proto which contains the service definition and protobuf, by running

protoc -I . ./ideas.proto --go_out=plugins=grpc:$GOSRC

• go build && ./server in server dir to run server
• go build && ./client in client dir to run client

you can optionally pass the port flag while running server/client to listen/dial on that port

Resources

• protobuf vs http benchmark
• why use protobuf
• compile protobuf