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https://github.com/open-telemetry/opentelemetry-go.git
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15bfc5bb12
Also fixes example module paths so that they use the vanity URL instead of the github URL. [Closes #184]
50 lines
1.3 KiB
Go
50 lines
1.3 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 trace
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import (
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"math/rand"
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"sync"
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"go.opentelemetry.io/otel/api/core"
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"go.opentelemetry.io/otel/sdk/trace/internal"
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)
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type defaultIDGenerator struct {
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sync.Mutex
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randSource *rand.Rand
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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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func (gen *defaultIDGenerator) NewSpanID() core.SpanID {
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gen.Lock()
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defer gen.Unlock()
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sid := core.SpanID{}
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gen.randSource.Read(sid[:])
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return sid
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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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func (gen *defaultIDGenerator) NewTraceID() core.TraceID {
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gen.Lock()
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defer gen.Unlock()
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tid := core.TraceID{}
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gen.randSource.Read(tid[:])
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return tid
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}
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