mirror of
https://github.com/open-telemetry/opentelemetry-go.git
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a485d0ec64
* Update License header for all source files - Add Apache 2.0 header to source files that did not have one. - Update all existing headers dated to 2019 to be 2020 - Remove comma from License header to comply with the Apache 2.0 guidelines. * Update Copyright notice Use the standard Copyright notices outlined by the [CNCF](https://github.com/cncf/foundation/blob/master/copyright-notices.md#copyright-notices)
74 lines
1.6 KiB
Go
74 lines
1.6 KiB
Go
// Copyright The 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 testtrace
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import (
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"encoding/binary"
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"sync"
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"go.opentelemetry.io/otel/api/core"
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)
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type Generator interface {
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TraceID() core.TraceID
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SpanID() core.SpanID
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}
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var _ Generator = (*CountGenerator)(nil)
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// CountGenerator is a simple Generator that can be used to create unique, albeit deterministic,
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// trace and span IDs.
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type CountGenerator struct {
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lock sync.Mutex
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traceIDHigh uint64
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traceIDLow uint64
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spanID uint64
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}
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func NewCountGenerator() *CountGenerator {
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return &CountGenerator{}
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}
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func (g *CountGenerator) TraceID() core.TraceID {
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g.lock.Lock()
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defer g.lock.Unlock()
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if g.traceIDHigh == g.traceIDLow {
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g.traceIDHigh++
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} else {
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g.traceIDLow++
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}
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var traceID core.TraceID
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binary.BigEndian.PutUint64(traceID[0:8], g.traceIDLow)
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binary.BigEndian.PutUint64(traceID[8:], g.traceIDHigh)
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return traceID
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}
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func (g *CountGenerator) SpanID() core.SpanID {
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g.lock.Lock()
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defer g.lock.Unlock()
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g.spanID++
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var spanID core.SpanID
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binary.BigEndian.PutUint64(spanID[:], g.spanID)
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return spanID
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}
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