294 lines
7.8 KiB
Go
294 lines
7.8 KiB
Go
package instana
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import (
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"context"
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"fmt"
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instana "github.com/instana/go-sensor"
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sensor "github.com/instana/go-sensor"
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"github.com/opentracing/opentracing-go"
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"github.com/opentracing/opentracing-go/log"
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"go.unistack.org/micro/v3/metadata"
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"go.unistack.org/micro/v3/tracer"
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rutil "go.unistack.org/micro/v3/util/reflect"
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"go.unistack.org/micro/v3/util/sort"
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)
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var _ tracer.Tracer = (*Tracer)(nil)
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type Tracer struct {
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opts tracer.Options
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sensor sensor.Tracer
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}
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func (t *Tracer) Name() string {
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return t.opts.Name
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}
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func (t *Tracer) Flush(ctx context.Context) error {
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sensor.ShutdownSensor()
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return nil
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}
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func (t *Tracer) Init(opts ...tracer.Option) error {
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for _, o := range opts {
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o(&t.opts)
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}
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sensorOptions := sensor.DefaultOptions()
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if v, ok := t.opts.Context.Value(tracerOptionsKey{}).(*sensor.Options); ok && v != nil {
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sensorOptions = v
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}
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if sensorOptions.Service == "" {
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sensorOptions.Service = "micro"
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}
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var recorder instana.SpanRecorder
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recorder = &sensor.Recorder{}
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if v, ok := t.opts.Context.Value(recorderKey{}).(sensor.SpanRecorder); ok && v != nil {
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recorder = v
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}
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t.sensor = sensor.NewSensorWithTracer(sensor.NewTracerWithEverything(sensorOptions, recorder))
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sensor.StartMetrics(sensorOptions)
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return nil
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}
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type idStringer struct {
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s string
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}
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func (s idStringer) String() string {
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return s.s
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}
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type spanContext interface {
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TraceID() idStringer
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SpanID() idStringer
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}
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func (t *Tracer) Start(ctx context.Context, name string, opts ...tracer.SpanOption) (context.Context, tracer.Span) {
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options := tracer.NewSpanOptions(opts...)
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var span opentracing.Span
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switch options.Kind {
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case tracer.SpanKindInternal, tracer.SpanKindUnspecified:
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ctx, span = t.startSpanFromContext(ctx, name)
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case tracer.SpanKindClient, tracer.SpanKindProducer:
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ctx, span = t.startSpanFromOutgoingContext(ctx, name)
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case tracer.SpanKindServer, tracer.SpanKindConsumer:
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ctx, span = t.startSpanFromIncomingContext(ctx, name)
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}
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sp := &otSpan{topts: t.opts, span: span, opts: options, sensor: t.sensor, status: tracer.SpanStatusOK}
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spctx := span.Context()
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if v, ok := spctx.(spanContext); ok {
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sp.traceID = v.TraceID().String()
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sp.spanID = v.SpanID().String()
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} else {
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if val, err := rutil.StructFieldByName(spctx, "TraceID"); err == nil {
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sp.traceID = fmt.Sprintf("%v", val)
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}
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if val, err := rutil.StructFieldByName(spctx, "SpanID"); err == nil {
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sp.spanID = fmt.Sprintf("%v", val)
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}
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}
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return ctx, sp
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}
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type otSpan struct {
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span opentracing.Span
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spanID string
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traceID string
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sensor sensor.Tracer
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topts tracer.Options
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opts tracer.SpanOptions
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status tracer.SpanStatus
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statusMsg string
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}
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func (os *otSpan) TraceID() string {
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return os.traceID
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}
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func (os *otSpan) SpanID() string {
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return os.spanID
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}
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func (os *otSpan) SetStatus(st tracer.SpanStatus, msg string) {
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switch st {
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case tracer.SpanStatusError:
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os.span.SetTag("error", true)
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}
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os.status = st
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os.statusMsg = msg
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}
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func (os *otSpan) Status() (tracer.SpanStatus, string) {
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return os.status, os.statusMsg
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}
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func (os *otSpan) Tracer() tracer.Tracer {
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return &Tracer{sensor: os.sensor, opts: os.topts}
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}
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func (os *otSpan) AddLogs(kv ...interface{}) {
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os.span.LogKV(kv...)
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}
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func (os *otSpan) Finish(opts ...tracer.SpanOption) {
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if len(os.opts.Labels)%2 != 0 {
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os.opts.Labels = os.opts.Labels[:len(os.opts.Labels)-1]
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}
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os.opts.Labels = sort.Uniq(os.opts.Labels)
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for idx := 0; idx < len(os.opts.Labels); idx += 2 {
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switch os.opts.Labels[idx] {
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case "err":
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os.status = tracer.SpanStatusError
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os.statusMsg = fmt.Sprintf("%v", os.opts.Labels[idx+1])
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case "error":
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continue
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case "X-Request-Id", "x-request-id":
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os.span.SetTag("x-request-id", os.opts.Labels[idx+1])
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case "rpc.call", "rpc.call_type", "rpc.flavor", "rpc.service", "rpc.method",
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"sdk.database", "db.statement", "db.args", "db.query", "db.method",
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"messaging.destination.name", "messaging.source.name", "messaging.operation":
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os.span.SetTag(fmt.Sprintf("%v", os.opts.Labels[idx]), os.opts.Labels[idx+1])
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default:
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os.span.LogKV(os.opts.Labels[idx], os.opts.Labels[idx+1])
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}
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}
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if os.status == tracer.SpanStatusError {
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os.span.SetTag("error", true)
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os.span.LogKV("error", os.statusMsg)
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}
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os.span.SetTag("span.kind", os.opts.Kind)
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os.span.Finish()
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}
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func (os *otSpan) AddEvent(name string, opts ...tracer.EventOption) {
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os.span.LogFields(log.Event(name))
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}
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func (os *otSpan) Context() context.Context {
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return opentracing.ContextWithSpan(context.Background(), os.span)
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}
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func (os *otSpan) SetName(name string) {
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os.span = os.span.SetOperationName(name)
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}
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func (os *otSpan) SetLabels(labels ...interface{}) {
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os.opts.Labels = labels
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}
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func (os *otSpan) Kind() tracer.SpanKind {
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return os.opts.Kind
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}
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func (os *otSpan) AddLabels(labels ...interface{}) {
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os.opts.Labels = append(os.opts.Labels, labels...)
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}
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func NewTracer(opts ...tracer.Option) *Tracer {
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options := tracer.NewOptions(opts...)
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return &Tracer{opts: options}
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}
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func spanFromContext(ctx context.Context) (opentracing.Span, bool) {
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return sensor.SpanFromContext(ctx)
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}
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func (t *Tracer) startSpanFromAny(ctx context.Context, name string, opts ...opentracing.StartSpanOption) (context.Context, opentracing.Span) {
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if tracerSpan, ok := tracer.SpanFromContext(ctx); ok && tracerSpan != nil {
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return t.startSpanFromContext(ctx, name, opts...)
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}
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if otSpan := opentracing.SpanFromContext(ctx); otSpan != nil {
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return t.startSpanFromContext(ctx, name, opts...)
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}
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if md, ok := metadata.FromIncomingContext(ctx); ok && md != nil {
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return t.startSpanFromIncomingContext(ctx, name, opts...)
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}
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if md, ok := metadata.FromOutgoingContext(ctx); ok && md != nil {
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return t.startSpanFromOutgoingContext(ctx, name, opts...)
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}
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return t.startSpanFromContext(ctx, name, opts...)
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}
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func (t *Tracer) startSpanFromContext(ctx context.Context, name string, opts ...opentracing.StartSpanOption) (context.Context, opentracing.Span) {
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if parentSpan := opentracing.SpanFromContext(ctx); parentSpan != nil {
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opts = append(opts, opentracing.ChildOf(parentSpan.Context()))
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}
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md := metadata.New(1)
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sp := t.sensor.StartSpan(name, opts...)
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if err := sp.Tracer().Inject(sp.Context(), opentracing.TextMap, opentracing.TextMapCarrier(md)); err != nil {
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return nil, nil
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}
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ctx = opentracing.ContextWithSpan(ctx, sp)
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return ctx, sp
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}
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func (t *Tracer) startSpanFromOutgoingContext(ctx context.Context, name string, opts ...opentracing.StartSpanOption) (context.Context, opentracing.Span) {
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var parentCtx opentracing.SpanContext
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md, ok := metadata.FromOutgoingContext(ctx)
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if ok && md != nil {
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if spanCtx, err := t.sensor.Extract(opentracing.TextMap, opentracing.TextMapCarrier(md)); err == nil && ok {
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parentCtx = spanCtx
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}
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}
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if parentCtx != nil {
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opts = append(opts, opentracing.ChildOf(parentCtx))
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}
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nmd := metadata.Copy(md)
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sp := t.sensor.StartSpan(name, opts...)
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if err := sp.Tracer().Inject(sp.Context(), opentracing.TextMap, opentracing.TextMapCarrier(nmd)); err != nil {
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return nil, nil
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}
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ctx = metadata.NewOutgoingContext(opentracing.ContextWithSpan(ctx, sp), nmd)
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return ctx, sp
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}
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func (t *Tracer) startSpanFromIncomingContext(ctx context.Context, name string, opts ...opentracing.StartSpanOption) (context.Context, opentracing.Span) {
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var parentCtx opentracing.SpanContext
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md, ok := metadata.FromIncomingContext(ctx)
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if ok && md != nil {
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if spanCtx, err := t.sensor.Extract(opentracing.TextMap, opentracing.TextMapCarrier(md)); err == nil {
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parentCtx = spanCtx
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}
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}
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if parentCtx != nil {
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opts = append(opts, opentracing.ChildOf(parentCtx))
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}
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nmd := metadata.Copy(md)
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sp := t.sensor.StartSpan(name, opts...)
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// fmt.Printf("StartSpan %#+v\n", sp)
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if err := sp.Tracer().Inject(sp.Context(), opentracing.TextMap, opentracing.TextMapCarrier(nmd)); err != nil {
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return nil, nil
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}
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ctx = metadata.NewIncomingContext(opentracing.ContextWithSpan(ctx, sp), nmd)
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return ctx, sp
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}
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