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stats_handler.go
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/
stats_handler.go
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// Copyright The OpenTelemetry Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package otelgrpc // import "go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc"
import (
"context"
"fmt"
"sync/atomic"
"go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc/internal"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/codes"
semconv "go.opentelemetry.io/otel/semconv/v1.12.0"
"go.opentelemetry.io/otel/trace"
grpc_codes "google.golang.org/grpc/codes"
"google.golang.org/grpc/stats"
"google.golang.org/grpc/status"
)
type grpcContext struct {
messagesReceived int64
messagesSent int64
attributes []attribute.KeyValue
name string
}
func NewServerHandler(opts ...Option) stats.Handler {
h := &serverHandler{
config: newConfig(opts),
}
h.tracer = h.config.TracerProvider.Tracer(
instrumentationName,
trace.WithInstrumentationVersion(SemVersion()),
)
return h
}
type serverHandler struct {
*config
tracer trace.Tracer
}
// TagRPC can attach some information to the given context.
func (h *serverHandler) TagRPC(ctx context.Context, info *stats.RPCTagInfo) context.Context {
attrs := []attribute.KeyValue{RPCSystemGRPC}
name, mAttrs := internal.ParseFullMethod(info.FullMethodName)
fmt.Printf("Server TagRPC: %v\n", name)
attrs = append(attrs, mAttrs...)
ctx, _ = h.tracer.Start(
ctx,
name,
trace.WithSpanKind(trace.SpanKindServer),
trace.WithAttributes(attrs...),
)
gctx := grpcContext{}
return context.WithValue(ctx, grpcContextKey, &gctx)
}
// HandleRPC processes the RPC stats.
func (h *serverHandler) HandleRPC(ctx context.Context, rs stats.RPCStats) {
fmt.Println("Server HandleRPC")
span := trace.SpanFromContext(ctx)
gctx, _ := ctx.Value(grpcContextKey).(*grpcContext)
var messageId int64 = 0
switch rs := rs.(type) {
case *stats.OutHeader:
fmt.Println(" Server HandleRPC: stats.OutHeader")
case *stats.OutTrailer:
fmt.Println(" Server HandleRPC: stats.OutTrailer")
case *stats.Begin:
fmt.Println(" Server HandleRPC: stats.Begin")
case *stats.InPayload:
fmt.Println(" Server HandleRPC: stats.InPayload")
if gctx != nil {
messageId = atomic.AddInt64(&gctx.messagesReceived, 1)
}
span.AddEvent("message",
trace.WithAttributes(
semconv.MessageTypeReceived,
semconv.MessageUncompressedSizeKey.Int(rs.Length),
semconv.MessageIDKey.Int64(messageId),
),
)
case *stats.OutPayload:
fmt.Println(" Server HandleRPC: stats.OutPayload")
if gctx != nil {
messageId = atomic.AddInt64(&gctx.messagesSent, 1)
}
span.AddEvent("message",
trace.WithAttributes(
semconv.MessageTypeSent,
semconv.MessageUncompressedSizeKey.Int(rs.Length),
semconv.MessageIDKey.Int64(messageId),
),
)
case *stats.End:
fmt.Println(" Server HandleRPC: stats.End")
if rs.Error != nil {
s, _ := status.FromError(rs.Error)
span.SetStatus(codes.Error, s.Message())
span.SetAttributes(statusCodeAttr(s.Code()))
} else {
span.SetAttributes(statusCodeAttr(grpc_codes.OK))
}
span.End()
default:
return
}
}
// TagConn can attach some information to the given context.
func (h *serverHandler) TagConn(ctx context.Context, info *stats.ConnTagInfo) context.Context {
fmt.Println("Server TagConn")
span := trace.SpanFromContext(ctx)
attrs := peerAttr(info.RemoteAddr.String())
printAttrs("TagConn", attrs)
span.SetAttributes(attrs...)
return ctx
}
// HandleConn processes the Conn stats.
func (h *serverHandler) HandleConn(context.Context, stats.ConnStats) {
fmt.Println("Server HandleConn")
}
func NewClientHandler(opts ...Option) stats.Handler {
h := &clientHandler{
config: newConfig(opts),
}
h.tracer = h.config.TracerProvider.Tracer(
instrumentationName,
trace.WithInstrumentationVersion(SemVersion()),
)
return h
}
type clientHandler struct {
*config
tracer trace.Tracer
}
const grpcContextKey = "otel-trace-bin"
// TagRPC can attach some information to the given context.
func (h *clientHandler) TagRPC(ctx context.Context, info *stats.RPCTagInfo) context.Context {
// md, _ := metadata.FromIncomingContext(ctx)
// h.Propagators.Extract(ctx, &metadataSupplier{metadata: &md})
attrs := []attribute.KeyValue{RPCSystemGRPC}
name, mAttrs := internal.ParseFullMethod(info.FullMethodName)
fmt.Printf("Client TagRPC: %v\n", name)
attrs = append(attrs, mAttrs...)
ctx, _ = h.tracer.Start(
ctx,
name,
trace.WithSpanKind(trace.SpanKindClient),
trace.WithAttributes(attrs...),
)
gctx := grpcContext{}
return context.WithValue(ctx, grpcContextKey, &gctx)
}
// HandleRPC processes the RPC stats.
func (h *clientHandler) HandleRPC(ctx context.Context, rs stats.RPCStats) {
fmt.Println("Client HandleRPC")
span := trace.SpanFromContext(ctx)
gctx, _ := ctx.Value(grpcContextKey).(*grpcContext)
var messageId int64 = 0
switch rs := rs.(type) {
case *stats.OutHeader:
fmt.Println(" Client HandleRPC: stats.OutHeader")
case *stats.OutTrailer:
fmt.Println(" Client HandleRPC: stats.OutTrailer")
case *stats.Begin:
fmt.Println(" Client HandleRPC: stats.Begin")
case *stats.InPayload:
fmt.Println(" Client HandleRPC: stats.InPayload")
if gctx != nil {
messageId = atomic.AddInt64(&gctx.messagesReceived, 1)
}
span.AddEvent("message",
trace.WithAttributes(
semconv.MessageTypeReceived,
semconv.MessageUncompressedSizeKey.Int(rs.Length),
semconv.MessageIDKey.Int64(messageId),
),
)
case *stats.OutPayload:
fmt.Println(" Client HandleRPC: stats.OutPayload")
if gctx != nil {
messageId = atomic.AddInt64(&gctx.messagesSent, 1)
}
span.AddEvent("message",
trace.WithAttributes(
semconv.MessageTypeSent,
semconv.MessageUncompressedSizeKey.Int(rs.Length),
semconv.MessageIDKey.Int64(messageId),
),
)
case *stats.End:
fmt.Println(" Client HandleRPC: stats.End")
if rs.Error != nil {
s, _ := status.FromError(rs.Error)
span.SetStatus(codes.Error, s.Message())
span.SetAttributes(statusCodeAttr(s.Code()))
} else {
span.SetAttributes(statusCodeAttr(grpc_codes.OK))
}
span.End()
default:
return
}
}
// TagConn can attach some information to the given context.
func (h *clientHandler) TagConn(ctx context.Context, cti *stats.ConnTagInfo) context.Context {
fmt.Println("Client TagConn")
span := trace.SpanFromContext(ctx)
attrs := peerAttr(cti.RemoteAddr.String())
printAttrs("TagConn", attrs)
span.SetAttributes(attrs...)
return ctx
}
// HandleConn processes the Conn stats.
func (h *clientHandler) HandleConn(context.Context, stats.ConnStats) {
fmt.Println("Client HandleConn")
// no-op
}
func printAttrs(stage string, attributes []attribute.KeyValue) {
for _, kv := range attributes {
fmt.Printf("stage %v: got attr [%v: %v]\n", stage, kv.Key, kv.Value)
}
}