63 lines
2.7 KiB
Go
63 lines
2.7 KiB
Go
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// Copyright (c) 2017 Uber Technologies, Inc.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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package jaeger
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import (
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opentracing "github.com/opentracing/opentracing-go"
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)
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// ContribObserver can be registered with the Tracer to receive notifications
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// about new Spans. Modelled after github.com/opentracing-contrib/go-observer.
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type ContribObserver interface {
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// Create and return a span observer. Called when a span starts.
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// If the Observer is not interested in the given span, it must return (nil, false).
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// E.g :
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// func StartSpan(opName string, opts ...opentracing.StartSpanOption) {
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// var sp opentracing.Span
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// sso := opentracing.StartSpanOptions{}
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// if spanObserver, ok := Observer.OnStartSpan(span, opName, sso); ok {
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// // we have a valid SpanObserver
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// }
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// ...
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// }
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OnStartSpan(sp opentracing.Span, operationName string, options opentracing.StartSpanOptions) (ContribSpanObserver, bool)
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}
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// ContribSpanObserver is created by the Observer and receives notifications
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// about other Span events. This interface is meant to match
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// github.com/opentracing-contrib/go-observer, via duck typing, without
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// directly importing the go-observer package.
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type ContribSpanObserver interface {
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OnSetOperationName(operationName string)
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OnSetTag(key string, value interface{})
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OnFinish(options opentracing.FinishOptions)
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}
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// wrapper observer for the old observers (see observer.go)
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type oldObserver struct {
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obs Observer
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}
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func (o *oldObserver) OnStartSpan(sp opentracing.Span, operationName string, options opentracing.StartSpanOptions) (ContribSpanObserver, bool) {
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spanObserver := o.obs.OnStartSpan(operationName, options)
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return spanObserver, spanObserver != nil
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}
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