284
otel.go
Normal file
284
otel.go
Normal file
@@ -0,0 +1,284 @@
|
||||
package otel
|
||||
|
||||
import (
|
||||
"context"
|
||||
"errors"
|
||||
"fmt"
|
||||
"strings"
|
||||
|
||||
"go.opentelemetry.io/otel/attribute"
|
||||
"go.opentelemetry.io/otel/baggage"
|
||||
"go.opentelemetry.io/otel/codes"
|
||||
"go.opentelemetry.io/otel/propagation"
|
||||
tracesdk "go.opentelemetry.io/otel/sdk/trace"
|
||||
"go.opentelemetry.io/otel/trace"
|
||||
"go.unistack.org/micro/v4/metadata"
|
||||
"go.unistack.org/micro/v4/tracer"
|
||||
)
|
||||
|
||||
var _ tracer.Tracer = (*otelTracer)(nil)
|
||||
|
||||
type otelTracer struct {
|
||||
opts tracer.Options
|
||||
tracep *tracesdk.TracerProvider
|
||||
tracer trace.Tracer
|
||||
propagator propagation.TextMapPropagator
|
||||
}
|
||||
|
||||
type otelSpan struct {
|
||||
ctx context.Context
|
||||
tracer trace.Tracer
|
||||
tracep *tracesdk.TracerProvider
|
||||
span trace.Span
|
||||
opts tracer.SpanOptions
|
||||
status tracer.SpanStatus
|
||||
statusMsg string
|
||||
}
|
||||
|
||||
func (ot *otelTracer) Name() string {
|
||||
return ot.opts.Name
|
||||
}
|
||||
|
||||
func (ot *otelTracer) Flush(ctx context.Context) error {
|
||||
return ot.tracep.ForceFlush(ctx)
|
||||
}
|
||||
|
||||
func (ot *otelTracer) Init(opts ...tracer.Option) error {
|
||||
for _, o := range opts {
|
||||
o(&ot.opts)
|
||||
}
|
||||
|
||||
var to []trace.TracerOption
|
||||
if o, ok := ot.opts.Context.Value(tracerOptionsKey{}).([]trace.TracerOption); ok {
|
||||
to = o
|
||||
}
|
||||
|
||||
var tp *tracesdk.TracerProvider
|
||||
if p, ok := ot.opts.Context.Value(providerKey{}).(*tracesdk.TracerProvider); ok {
|
||||
tp = p
|
||||
}
|
||||
|
||||
if o, ok := ot.opts.Context.Value(providerOptionsKey{}).([]tracesdk.TracerProviderOption); ok {
|
||||
tp = tracesdk.NewTracerProvider(o...)
|
||||
}
|
||||
|
||||
if tp == nil {
|
||||
return fmt.Errorf("missing Provider or ProviderOptions option")
|
||||
}
|
||||
|
||||
ot.tracep = tp
|
||||
ot.tracer = tp.Tracer(ot.opts.Name, to...)
|
||||
ot.propagator = propagation.NewCompositeTextMapPropagator(
|
||||
propagation.Baggage{},
|
||||
propagation.TraceContext{},
|
||||
)
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
func (ot *otelTracer) Start(ctx context.Context, name string, opts ...tracer.SpanOption) (context.Context, tracer.Span) {
|
||||
options := tracer.NewSpanOptions(opts...)
|
||||
var span trace.Span
|
||||
switch options.Kind {
|
||||
case tracer.SpanKindInternal, tracer.SpanKindUnspecified:
|
||||
ctx, span = ot.startSpanFromContext(ctx, name)
|
||||
case tracer.SpanKindClient, tracer.SpanKindProducer:
|
||||
ctx, span = ot.startSpanFromOutgoingContext(ctx, name)
|
||||
case tracer.SpanKindServer, tracer.SpanKindConsumer:
|
||||
ctx, span = ot.startSpanFromIncomingContext(ctx, name)
|
||||
}
|
||||
return ctx, &otelSpan{ctx: ctx, tracep: ot.tracep, tracer: ot.tracer, span: span, opts: options}
|
||||
}
|
||||
|
||||
func (os *otelSpan) SetStatus(st tracer.SpanStatus, msg string) {
|
||||
switch st {
|
||||
case tracer.SpanStatusError:
|
||||
os.span.SetStatus(codes.Error, msg)
|
||||
os.span.RecordError(errors.New(msg))
|
||||
case tracer.SpanStatusOK:
|
||||
os.span.SetStatus(codes.Ok, msg)
|
||||
case tracer.SpanStatusUnset:
|
||||
os.span.SetStatus(codes.Unset, msg)
|
||||
}
|
||||
os.status = st
|
||||
os.statusMsg = msg
|
||||
}
|
||||
|
||||
func (os *otelSpan) Status() (tracer.SpanStatus, string) {
|
||||
return os.status, os.statusMsg
|
||||
}
|
||||
|
||||
func (os *otelSpan) Tracer() tracer.Tracer {
|
||||
return &otelTracer{tracep: os.tracep, tracer: os.tracer}
|
||||
}
|
||||
|
||||
func (os *otelSpan) Finish(opts ...tracer.SpanOption) {
|
||||
if len(os.opts.Labels) > 0 {
|
||||
os.span.SetAttributes(convertLabels(os.opts.Labels...)...)
|
||||
}
|
||||
os.span.End()
|
||||
}
|
||||
|
||||
func (os *otelSpan) AddEvent(name string, opts ...tracer.EventOption) {
|
||||
os.span.AddEvent(name)
|
||||
}
|
||||
|
||||
func (os *otelSpan) Context() context.Context {
|
||||
return trace.ContextWithSpan(os.ctx, os.span)
|
||||
}
|
||||
|
||||
func (os *otelSpan) SetName(name string) {
|
||||
os.span.SetName(name)
|
||||
}
|
||||
|
||||
func (os *otelSpan) SetLabels(labels ...interface{}) {
|
||||
os.opts.Labels = labels
|
||||
}
|
||||
|
||||
func (os *otelSpan) Kind() tracer.SpanKind {
|
||||
return os.opts.Kind
|
||||
}
|
||||
|
||||
func (os *otelSpan) AddLabels(labels ...interface{}) {
|
||||
os.opts.Labels = append(os.opts.Labels, labels...)
|
||||
}
|
||||
|
||||
func NewTracer(opts ...tracer.Option) *otelTracer {
|
||||
options := tracer.NewOptions(opts...)
|
||||
return &otelTracer{opts: options}
|
||||
}
|
||||
|
||||
func (ot *otelTracer) startSpanFromContext(ctx context.Context, name string, opts ...trace.SpanStartOption) (context.Context, trace.Span) {
|
||||
md, ok := metadata.FromContext(ctx)
|
||||
if !ok {
|
||||
md = metadata.New(1)
|
||||
}
|
||||
|
||||
mc := make(propagation.MapCarrier)
|
||||
for k, v := range md {
|
||||
for _, f := range ot.propagator.Fields() {
|
||||
if strings.EqualFold(k, f) {
|
||||
mc[f] = v
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
ctx = ot.propagator.Extract(ctx, mc)
|
||||
spanCtx := trace.SpanContextFromContext(ctx)
|
||||
ctx = baggage.ContextWithBaggage(ctx, baggage.FromContext(ctx))
|
||||
|
||||
var span trace.Span
|
||||
ctx, span = ot.tracer.Start(trace.ContextWithRemoteSpanContext(ctx, spanCtx), name, opts...)
|
||||
|
||||
mc = make(propagation.MapCarrier)
|
||||
ot.propagator.Inject(ctx, mc)
|
||||
for k, v := range mc {
|
||||
md.Set(k, v)
|
||||
}
|
||||
ctx = metadata.NewContext(ctx, md)
|
||||
|
||||
return ctx, span
|
||||
}
|
||||
|
||||
func (ot *otelTracer) startSpanFromOutgoingContext(ctx context.Context, name string, opts ...trace.SpanStartOption) (context.Context, trace.Span) {
|
||||
md, ok := metadata.FromOutgoingContext(ctx)
|
||||
if !ok {
|
||||
md = metadata.New(1)
|
||||
}
|
||||
|
||||
mc := make(propagation.MapCarrier)
|
||||
for k, v := range md {
|
||||
for _, f := range ot.propagator.Fields() {
|
||||
if strings.EqualFold(k, f) {
|
||||
mc[f] = v
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
ctx = ot.propagator.Extract(ctx, mc)
|
||||
spanCtx := trace.SpanContextFromContext(ctx)
|
||||
ctx = baggage.ContextWithBaggage(ctx, baggage.FromContext(ctx))
|
||||
|
||||
var span trace.Span
|
||||
ctx, span = ot.tracer.Start(trace.ContextWithRemoteSpanContext(ctx, spanCtx), name, opts...)
|
||||
|
||||
mc = make(propagation.MapCarrier)
|
||||
ot.propagator.Inject(ctx, mc)
|
||||
for k, v := range mc {
|
||||
md.Set(k, v)
|
||||
}
|
||||
ctx = metadata.NewOutgoingContext(ctx, md)
|
||||
|
||||
return ctx, span
|
||||
}
|
||||
|
||||
func (ot *otelTracer) startSpanFromIncomingContext(ctx context.Context, name string, opts ...trace.SpanStartOption) (context.Context, trace.Span) {
|
||||
md, ok := metadata.FromIncomingContext(ctx)
|
||||
if !ok {
|
||||
md = metadata.New(1)
|
||||
}
|
||||
|
||||
mc := make(propagation.MapCarrier)
|
||||
for k, v := range md {
|
||||
for _, f := range ot.propagator.Fields() {
|
||||
if strings.EqualFold(k, f) {
|
||||
mc[f] = v
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
ctx = ot.propagator.Extract(ctx, mc)
|
||||
spanCtx := trace.SpanContextFromContext(ctx)
|
||||
ctx = baggage.ContextWithBaggage(ctx, baggage.FromContext(ctx))
|
||||
|
||||
var span trace.Span
|
||||
ctx, span = ot.tracer.Start(trace.ContextWithRemoteSpanContext(ctx, spanCtx), name, opts...)
|
||||
|
||||
mc = make(propagation.MapCarrier)
|
||||
ot.propagator.Inject(ctx, mc)
|
||||
for k, v := range mc {
|
||||
md.Set(k, v)
|
||||
}
|
||||
ctx = metadata.NewIncomingContext(ctx, md)
|
||||
|
||||
return ctx, span
|
||||
}
|
||||
|
||||
func convertLabels(labels ...interface{}) []attribute.KeyValue {
|
||||
kv := make([]attribute.KeyValue, 0, len(labels)/2)
|
||||
for idx := 0; idx < len(labels)/2; idx += 2 {
|
||||
if v, ok := labels[idx].(attribute.KeyValue); ok {
|
||||
kv = append(kv, v)
|
||||
}
|
||||
switch v := labels[idx+1].(type) {
|
||||
case attribute.KeyValue:
|
||||
kv = append(kv, v)
|
||||
case bool:
|
||||
kv = append(kv, attribute.Bool(labels[idx].(string), v))
|
||||
case []bool:
|
||||
kv = append(kv, attribute.BoolSlice(labels[idx].(string), v))
|
||||
case float64:
|
||||
kv = append(kv, attribute.Float64(labels[idx].(string), v))
|
||||
case []float64:
|
||||
kv = append(kv, attribute.Float64Slice(labels[idx].(string), v))
|
||||
case int:
|
||||
kv = append(kv, attribute.Int(labels[idx].(string), v))
|
||||
case []int:
|
||||
kv = append(kv, attribute.IntSlice(labels[idx].(string), v))
|
||||
case int64:
|
||||
kv = append(kv, attribute.Int64(labels[idx].(string), v))
|
||||
case []int64:
|
||||
kv = append(kv, attribute.Int64Slice(labels[idx].(string), v))
|
||||
case string:
|
||||
kv = append(kv, attribute.String(labels[idx].(string), v))
|
||||
case []string:
|
||||
kv = append(kv, attribute.StringSlice(labels[idx].(string), v))
|
||||
case fmt.Stringer:
|
||||
kv = append(kv, attribute.Stringer(labels[idx].(string), v))
|
||||
default:
|
||||
kv = append(kv, attribute.String(labels[idx].(string), fmt.Sprintf("%v", v)))
|
||||
}
|
||||
}
|
||||
|
||||
return kv
|
||||
}
|
||||
Reference in New Issue
Block a user