mirror of
https://github.com/rocky-linux/peridot.git
synced 2024-11-01 04:41:22 +00:00
98 lines
2.7 KiB
Go
98 lines
2.7 KiB
Go
// Copyright 2017, OpenCensus Authors
|
|
//
|
|
// 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 trace
|
|
|
|
import (
|
|
"sync"
|
|
"sync/atomic"
|
|
"time"
|
|
)
|
|
|
|
// Exporter is a type for functions that receive sampled trace spans.
|
|
//
|
|
// The ExportSpan method should be safe for concurrent use and should return
|
|
// quickly; if an Exporter takes a significant amount of time to process a
|
|
// SpanData, that work should be done on another goroutine.
|
|
//
|
|
// The SpanData should not be modified, but a pointer to it can be kept.
|
|
type Exporter interface {
|
|
ExportSpan(s *SpanData)
|
|
}
|
|
|
|
type exportersMap map[Exporter]struct{}
|
|
|
|
var (
|
|
exporterMu sync.Mutex
|
|
exporters atomic.Value
|
|
)
|
|
|
|
// RegisterExporter adds to the list of Exporters that will receive sampled
|
|
// trace spans.
|
|
//
|
|
// Binaries can register exporters, libraries shouldn't register exporters.
|
|
func RegisterExporter(e Exporter) {
|
|
exporterMu.Lock()
|
|
new := make(exportersMap)
|
|
if old, ok := exporters.Load().(exportersMap); ok {
|
|
for k, v := range old {
|
|
new[k] = v
|
|
}
|
|
}
|
|
new[e] = struct{}{}
|
|
exporters.Store(new)
|
|
exporterMu.Unlock()
|
|
}
|
|
|
|
// UnregisterExporter removes from the list of Exporters the Exporter that was
|
|
// registered with the given name.
|
|
func UnregisterExporter(e Exporter) {
|
|
exporterMu.Lock()
|
|
new := make(exportersMap)
|
|
if old, ok := exporters.Load().(exportersMap); ok {
|
|
for k, v := range old {
|
|
new[k] = v
|
|
}
|
|
}
|
|
delete(new, e)
|
|
exporters.Store(new)
|
|
exporterMu.Unlock()
|
|
}
|
|
|
|
// SpanData contains all the information collected by a Span.
|
|
type SpanData struct {
|
|
SpanContext
|
|
ParentSpanID SpanID
|
|
SpanKind int
|
|
Name string
|
|
StartTime time.Time
|
|
// The wall clock time of EndTime will be adjusted to always be offset
|
|
// from StartTime by the duration of the span.
|
|
EndTime time.Time
|
|
// The values of Attributes each have type string, bool, or int64.
|
|
Attributes map[string]interface{}
|
|
Annotations []Annotation
|
|
MessageEvents []MessageEvent
|
|
Status
|
|
Links []Link
|
|
HasRemoteParent bool
|
|
DroppedAttributeCount int
|
|
DroppedAnnotationCount int
|
|
DroppedMessageEventCount int
|
|
DroppedLinkCount int
|
|
|
|
// ChildSpanCount holds the number of child span created for this span.
|
|
ChildSpanCount int
|
|
}
|