add metrics, tracing, validation interceptors, add options: WithInterceptors, With{Client,Server}Interceptors

interceptors/tracing/interceptors.go

@@ -0,0 +1,41 @@
+package tracing
+
+import (
+	"github.com/grpc-ecosystem/grpc-opentracing/go/otgrpc"
+	"github.com/opentracing/opentracing-go"
+	"google.golang.org/grpc"
+
+	"go.linka.cloud/grpc/interceptors"
+)
+
+type tracing struct {
+	opts []otgrpc.Option
+}
+
+func NewInterceptors(opts ...otgrpc.Option) interceptors.Interceptors {
+	return tracing{opts: opts}
+}
+
+func NewClientInterceptors(opts ...otgrpc.Option) interceptors.ClientInterceptors {
+	return tracing{opts: opts}
+}
+
+func (t tracing) UnaryClientInterceptor() grpc.UnaryClientInterceptor {
+	return otgrpc.OpenTracingClientInterceptor(opentracing.GlobalTracer(), t.opts...)
+}
+
+func (t tracing) StreamClientInterceptor() grpc.StreamClientInterceptor {
+	return otgrpc.OpenTracingStreamClientInterceptor(opentracing.GlobalTracer(), t.opts...)
+}
+
+func NewServerInterceptors(opts ...otgrpc.Option) interceptors.ServerInterceptors {
+	return tracing{opts: opts}
+}
+
+func (t tracing) UnaryServerInterceptor() grpc.UnaryServerInterceptor {
+	return otgrpc.OpenTracingServerInterceptor(opentracing.GlobalTracer(), t.opts...)
+}
+
+func (t tracing) StreamServerInterceptor() grpc.StreamServerInterceptor {
+	return otgrpc.OpenTracingStreamServerInterceptor(opentracing.GlobalTracer(), t.opts...)
+}