2020-03-24 07:41:10 +02:00
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// Copyright The OpenTelemetry Authors
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2019-08-02 22:52:55 +02:00
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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 trace
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import (
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"math/rand"
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"sync"
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2020-05-02 14:17:11 +02:00
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"go.opentelemetry.io/otel/api/trace"
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2019-11-01 20:40:29 +02:00
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"go.opentelemetry.io/otel/sdk/trace/internal"
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2019-08-02 22:52:55 +02:00
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)
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type defaultIDGenerator struct {
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sync.Mutex
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2019-10-28 19:05:06 +02:00
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randSource *rand.Rand
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2019-08-02 22:52:55 +02:00
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}
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var _ internal.IDGenerator = &defaultIDGenerator{}
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// NewSpanID returns a non-zero span ID from a randomly-chosen sequence.
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2020-05-02 14:17:11 +02:00
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func (gen *defaultIDGenerator) NewSpanID() trace.SpanID {
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gen.Lock()
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defer gen.Unlock()
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2020-05-02 14:17:11 +02:00
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sid := trace.SpanID{}
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2019-10-28 19:05:06 +02:00
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gen.randSource.Read(sid[:])
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return sid
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2019-08-02 22:52:55 +02:00
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}
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// NewTraceID returns a non-zero trace ID from a randomly-chosen sequence.
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// mu should be held while this function is called.
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2020-05-02 14:23:09 +02:00
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func (gen *defaultIDGenerator) NewTraceID() trace.ID {
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2019-08-02 22:52:55 +02:00
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gen.Lock()
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defer gen.Unlock()
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2020-05-02 14:23:09 +02:00
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tid := trace.ID{}
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2019-10-28 19:05:06 +02:00
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gen.randSource.Read(tid[:])
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2019-08-02 22:52:55 +02:00
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return tid
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}
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