Use db.NotFoundErr to signal not found response

Gopkg.toml

@@ -37,6 +37,10 @@
   name = "github.com/golang/protobuf"
   version = "1.0.0"
 
+[[constraint]]
+  name = "github.com/sirupsen/logrus"
+  version = "1.0.5"
+
 [[constraint]]
   name = "github.com/stretchr/testify"
   version = "1.2.1"

server/api/interceptor.go

@@ -1,20 +1,21 @@
 package api
 
 import (
-	"context"
-	"time"
-
+	"github.com/grpc-ecosystem/go-grpc-middleware"
 	"github.com/sirupsen/logrus"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/codes"
 
-	grpcmiddleware "github.com/grpc-ecosystem/go-grpc-middleware"
+	"context"
+	"time"
+
+	"github.com/backstopmedia/gRPC-book-example/server/db"
 )
 
 // Interceptors implements the grpc.UnaryServerInteceptor function to add
 // interceptors around all gRPC calls
 func Interceptors() grpc.UnaryServerInterceptor {
-	return grpcmiddleware.ChainUnaryServer(
+	return grpc_middleware.ChainUnaryServer(
 		LoggingInterceptor,
 		ErrorsInterceptor,
 	)
@@ -26,7 +27,7 @@ func ErrorsInterceptor(ctx context.Context, req interface{}, info *grpc.UnarySer
 	out, err = handler(ctx, req)
 
 	switch tErr := err.(type) {
-	case NotFoundErr:
+	case db.NotFoundErr:
 		return out, grpc.Errorf(codes.NotFound, tErr.Error())
 	}
 

server/api/interceptor_test.go

@@ -1,24 +1,26 @@
 package api_test
 
 import (
+	"github.com/sirupsen/logrus"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/codes"
+
 	"bytes"
 	"context"
 	"errors"
 	"os"
 	"testing"
 
 	"github.com/backstopmedia/gRPC-book-example/server/api"
-	"github.com/sirupsen/logrus"
-	"github.com/stretchr/testify/assert"
-	"github.com/stretchr/testify/require"
-	"google.golang.org/grpc"
-	"google.golang.org/grpc/codes"
+	"github.com/backstopmedia/gRPC-book-example/server/db"
 )
 
 func TestErrorsInterceptor(t *testing.T) {
 	t.Run("Errros interceptor returns a codes.NotFound when a DB not found is returned", func(t *testing.T) {
 		handler := func(ctx context.Context, req interface{}) (interface{}, error) {
-			return nil, api.NotFoundErr{}
+			return nil, db.NotFoundErr{}
 		}
 
 		out, err := api.ErrorsInterceptor(nil, nil, nil, handler)