go.hexagonal-architecture each service communicate with port interface each service completely de-coupling project structure . ├── README.md ├── cmd │ └── main.go ├── docker-compose.yml ├── go.mod ├── go.sum ├── hexagonal.png └── internal ├── adapters │ ├── app │ │ └── api │ │ └── api.go │ ├── core │ │ └── arithmetic │ │ ├── arithmetic.go │ │ └── arithmetic_test.go │ └── framework │ ├── left │ │ └── grpc │ │ ├── proto │ │ │ └── arithmetic_svc.proto │ │ └── server │ │ └── server.go │ └── right │ └── db │ └── db.go └── ports ├── app.go ├── core.go ├── framework_left │ ├── arithmetic_svc.pb.go │ └── arithmetic_svc_grpc.pb.go └── framework_right.go start deps docker-compose up stop deps docker-compose down generate proto brew install protobuf protoc --go_out=internal/adapters/framework/left/grpc --go-grpc_out=internal/adapters/framework/left/grpc --proto_path=internal/adapters/framework/left/grpc/proto internal/adapters/framework/left/grpc/proto/*.proto run go run cmd/main.go client test install evans evans internal/adapters/framework/left/grpc/proto/arithmetic_svc.proto
