52 lines
1.3 KiB
Go
52 lines
1.3 KiB
Go
package zipkintracer
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import (
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otobserver "github.com/opentracing-contrib/go-observer"
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opentracing "github.com/opentracing/opentracing-go"
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)
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// observer is a dispatcher to other observers
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type observer struct {
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observers []otobserver.Observer
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}
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// spanObserver is a dispatcher to other span observers
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type spanObserver struct {
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observers []otobserver.SpanObserver
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}
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func (o observer) OnStartSpan(sp opentracing.Span, operationName string, options opentracing.StartSpanOptions) (otobserver.SpanObserver, bool) {
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var spanObservers []otobserver.SpanObserver
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for _, obs := range o.observers {
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spanObs, ok := obs.OnStartSpan(sp, operationName, options)
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if ok {
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if spanObservers == nil {
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spanObservers = make([]otobserver.SpanObserver, 0, len(o.observers))
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}
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spanObservers = append(spanObservers, spanObs)
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}
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}
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if len(spanObservers) == 0 {
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return nil, false
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}
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return spanObserver{observers: spanObservers}, true
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}
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func (o spanObserver) OnSetOperationName(operationName string) {
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for _, obs := range o.observers {
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obs.OnSetOperationName(operationName)
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}
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}
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func (o spanObserver) OnSetTag(key string, value interface{}) {
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for _, obs := range o.observers {
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obs.OnSetTag(key, value)
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}
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}
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func (o spanObserver) OnFinish(options opentracing.FinishOptions) {
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for _, obs := range o.observers {
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obs.OnFinish(options)
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}
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}
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