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