mirror of
https://github.com/prometheus/prometheus.git
synced 2024-11-16 10:34:06 -08:00
0393b188c9
* Trace remote read Signed-off-by: vas <vasily.sliouniaev@jet.com> * Use jaeger Signed-off-by: vas <vasily.sliouniaev@jet.com>
94 lines
3.2 KiB
Go
94 lines
3.2 KiB
Go
// Copyright (c) 2019 Uber Technologies, Inc.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package jaeger
|
|
|
|
// SamplingDecision is returned by the V2 samplers.
|
|
type SamplingDecision struct {
|
|
Sample bool
|
|
Retryable bool
|
|
Tags []Tag
|
|
}
|
|
|
|
// SamplerV2 is an extension of the V1 samplers that allows sampling decisions
|
|
// be made at different points of the span lifecycle.
|
|
type SamplerV2 interface {
|
|
OnCreateSpan(span *Span) SamplingDecision
|
|
OnSetOperationName(span *Span, operationName string) SamplingDecision
|
|
OnSetTag(span *Span, key string, value interface{}) SamplingDecision
|
|
OnFinishSpan(span *Span) SamplingDecision
|
|
|
|
// Close does a clean shutdown of the sampler, stopping any background
|
|
// go-routines it may have started.
|
|
Close()
|
|
}
|
|
|
|
// samplerV1toV2 wraps legacy V1 sampler into an adapter that make it look like V2.
|
|
func samplerV1toV2(s Sampler) SamplerV2 {
|
|
if s2, ok := s.(SamplerV2); ok {
|
|
return s2
|
|
}
|
|
type legacySamplerV1toV2Adapter struct {
|
|
legacySamplerV1Base
|
|
}
|
|
return &legacySamplerV1toV2Adapter{
|
|
legacySamplerV1Base: legacySamplerV1Base{
|
|
delegate: s.IsSampled,
|
|
},
|
|
}
|
|
}
|
|
|
|
// SamplerV2Base can be used by V2 samplers to implement dummy V1 methods.
|
|
// Supporting V1 API is required because Tracer configuration only accepts V1 Sampler
|
|
// for backwards compatibility reasons.
|
|
// TODO (breaking change) remove this in the next major release
|
|
type SamplerV2Base struct{}
|
|
|
|
// IsSampled implements IsSampled of Sampler.
|
|
func (SamplerV2Base) IsSampled(id TraceID, operation string) (sampled bool, tags []Tag) {
|
|
return false, nil
|
|
}
|
|
|
|
// Close implements Close of Sampler.
|
|
func (SamplerV2Base) Close() {}
|
|
|
|
// Equal implements Equal of Sampler.
|
|
func (SamplerV2Base) Equal(other Sampler) bool { return false }
|
|
|
|
// legacySamplerV1Base is used as a base for simple samplers that only implement
|
|
// the legacy isSampled() function that is not sensitive to its arguments.
|
|
type legacySamplerV1Base struct {
|
|
delegate func(id TraceID, operation string) (sampled bool, tags []Tag)
|
|
}
|
|
|
|
func (s *legacySamplerV1Base) OnCreateSpan(span *Span) SamplingDecision {
|
|
isSampled, tags := s.delegate(span.context.traceID, span.operationName)
|
|
return SamplingDecision{Sample: isSampled, Retryable: false, Tags: tags}
|
|
}
|
|
|
|
func (s *legacySamplerV1Base) OnSetOperationName(span *Span, operationName string) SamplingDecision {
|
|
isSampled, tags := s.delegate(span.context.traceID, span.operationName)
|
|
return SamplingDecision{Sample: isSampled, Retryable: false, Tags: tags}
|
|
}
|
|
|
|
func (s *legacySamplerV1Base) OnSetTag(span *Span, key string, value interface{}) SamplingDecision {
|
|
return SamplingDecision{Sample: false, Retryable: true}
|
|
}
|
|
|
|
func (s *legacySamplerV1Base) OnFinishSpan(span *Span) SamplingDecision {
|
|
return SamplingDecision{Sample: false, Retryable: true}
|
|
}
|
|
|
|
func (s *legacySamplerV1Base) Close() {}
|