fix golint issues in zrpc (#531)

zrpc/internal/serverinterceptors/authinterceptor.go

@@ -7,6 +7,7 @@ import (
 	"google.golang.org/grpc"
 )
 
+// StreamAuthorizeInterceptor returns a func that uses given authenticator in processing stream requests.
 func StreamAuthorizeInterceptor(authenticator *auth.Authenticator) grpc.StreamServerInterceptor {
 	return func(srv interface{}, stream grpc.ServerStream, info *grpc.StreamServerInfo,
 		handler grpc.StreamHandler) error {
@@ -18,6 +19,7 @@ func StreamAuthorizeInterceptor(authenticator *auth.Authenticator) grpc.StreamSe
 	}
 }
 
+// UnaryAuthorizeInterceptor returns a func that uses given authenticator in processing unary requests.
 func UnaryAuthorizeInterceptor(authenticator *auth.Authenticator) grpc.UnaryServerInterceptor {
 	return func(ctx context.Context, req interface{}, info *grpc.UnaryServerInfo,
 		handler grpc.UnaryHandler) (interface{}, error) {

zrpc/internal/serverinterceptors/crashinterceptor.go

@@ -10,6 +10,7 @@ import (
 	"google.golang.org/grpc/status"
 )
 
+// StreamCrashInterceptor catches panics in processing stream requests and recovers.
 func StreamCrashInterceptor(srv interface{}, stream grpc.ServerStream, info *grpc.StreamServerInfo,
 	handler grpc.StreamHandler) (err error) {
 	defer handleCrash(func(r interface{}) {
@@ -19,6 +20,7 @@ func StreamCrashInterceptor(srv interface{}, stream grpc.ServerStream, info *grp
 	return handler(srv, stream)
 }
 
+// UnaryCrashInterceptor catches panics in processing unary requests and recovers.
 func UnaryCrashInterceptor() grpc.UnaryServerInterceptor {
 	return func(ctx context.Context, req interface{}, info *grpc.UnaryServerInfo,
 		handler grpc.UnaryHandler) (resp interface{}, err error) {

zrpc/internal/serverinterceptors/prometheusinterceptor.go

@@ -32,6 +32,7 @@ var (
 	})
 )
 
+// UnaryPrometheusInterceptor returns a func that reports to the prometheus server.
 func UnaryPrometheusInterceptor() grpc.UnaryServerInterceptor {
 	return func(ctx context.Context, req interface{}, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (
 		interface{}, error) {

zrpc/internal/serverinterceptors/sheddinginterceptor.go

@@ -16,6 +16,7 @@ var (
 	lock         sync.Mutex
 )
 
+// UnarySheddingInterceptor returns a func that does load shedding on processing unary requests.
 func UnarySheddingInterceptor(shedder load.Shedder, metrics *stat.Metrics) grpc.UnaryServerInterceptor {
 	ensureSheddingStat()
 

zrpc/internal/serverinterceptors/statinterceptor.go

@@ -14,6 +14,7 @@ import (
 
 const serverSlowThreshold = time.Millisecond * 500
 
+// UnaryStatInterceptor returns a func that uses given metrics to report stats.
 func UnaryStatInterceptor(metrics *stat.Metrics) grpc.UnaryServerInterceptor {
 	return func(ctx context.Context, req interface{}, info *grpc.UnaryServerInfo,
 		handler grpc.UnaryHandler) (resp interface{}, err error) {

zrpc/internal/serverinterceptors/timeoutinterceptor.go

@@ -8,6 +8,7 @@ import (
 	"google.golang.org/grpc"
 )
 
+// UnaryTimeoutInterceptor returns a func that sets timeout to incoming unary requests.
 func UnaryTimeoutInterceptor(timeout time.Duration) grpc.UnaryServerInterceptor {
 	return func(ctx context.Context, req interface{}, info *grpc.UnaryServerInfo,
 		handler grpc.UnaryHandler) (resp interface{}, err error) {

zrpc/internal/serverinterceptors/tracinginterceptor.go

@@ -8,6 +8,7 @@ import (
 	"google.golang.org/grpc/metadata"
 )
 
+// UnaryTracingInterceptor returns a func that handles tracing with given service name.
 func UnaryTracingInterceptor(serviceName string) grpc.UnaryServerInterceptor {
 	return func(ctx context.Context, req interface{}, info *grpc.UnaryServerInfo,
 		handler grpc.UnaryHandler) (resp interface{}, err error) {