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https://github.com/open-telemetry/opentelemetry-go.git
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3ca747f4e8
* add exported value for traceOptionBitMaskUnused (for testing) * move key_test to package core_test * add span_context_test to package core_test
72 lines
1.8 KiB
Go
72 lines
1.8 KiB
Go
// Copyright 2019, OpenTelemetry Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package core
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import (
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"fmt"
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)
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type TraceID struct {
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High uint64
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Low uint64
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}
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const (
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traceOptionBitMaskSampled = byte(0x01)
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traceOptionBitMaskUnused = byte(0xFE)
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// TraceOptionSampled is a byte with sampled bit set. It is a convenient value initialize
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// SpanContext when a trace is sampled.
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TraceOptionSampled = traceOptionBitMaskSampled
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TraceOptionUnused = traceOptionBitMaskUnused
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)
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type SpanContext struct {
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TraceID TraceID
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SpanID uint64
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TraceOptions byte
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}
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// EmptySpanContext is meant for internal use to return invalid span context during error conditions.
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func EmptySpanContext() SpanContext {
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return SpanContext{}
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}
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func (sc SpanContext) IsValid() bool {
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return sc.HasTraceID() && sc.HasSpanID()
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}
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func (sc SpanContext) HasTraceID() bool {
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return sc.TraceID.High != 0 || sc.TraceID.Low != 0
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}
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func (sc SpanContext) HasSpanID() bool {
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return sc.SpanID != 0
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}
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func (sc SpanContext) SpanIDString() string {
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return fmt.Sprintf("%.16x", sc.SpanID)
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}
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func (sc SpanContext) TraceIDString() string {
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p1 := fmt.Sprintf("%.16x", sc.TraceID.High)
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p2 := fmt.Sprintf("%.16x", sc.TraceID.Low)
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return p1 + p2
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}
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func (sc SpanContext) IsSampled() bool {
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return sc.TraceOptions&traceOptionBitMaskSampled == traceOptionBitMaskSampled
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}
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