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https://github.com/open-telemetry/opentelemetry-go.git
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7a1cbbc191
* Refactor SDK Sampler API to conform to Spec * Sampler is now an interface rather than a function type * SamplingParameters include the span Kind, Attributes, and Links * SamplingResult includes a SamplingDecision with three possible values, as well as Attributes * Add attributes retruned from a Sampler to the span * Add SpanKind, Attributes, and Links to API Sampler.ShouldSample() parameters * Drop "Get" from sdk Sampler.GetDescription to match api Sampler * Make spanID parameter in API Sampler interface a core.SpanID * Fix types and printf format per PR feedback from krnowak * Ensure unit test error messages reflect new reality Co-authored-by: Joshua MacDonald <jmacd@users.noreply.github.com>
56 lines
1.4 KiB
Go
56 lines
1.4 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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"go.opentelemetry.io/otel/api/core"
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)
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const (
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alwaysSamplerDescription = "AlwaysSampleSampler"
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)
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var alwaysSampleDecision = Decision{Sampled: true}
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type alwaysSampleSampler struct{}
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// ShouldSample implements Sampler interface.
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// It always returns a Decision with Sampled value set to true
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// and with Attributes set to an empty slice.
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func (as alwaysSampleSampler) ShouldSample(
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_ core.SpanContext,
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_ bool,
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_ core.TraceID,
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_ core.SpanID,
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_ string,
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_ SpanKind,
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_ []core.KeyValue,
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_ []Link,
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) Decision {
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return alwaysSampleDecision
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}
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// Description implements Sampler interface.
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// It returns the description of this sampler.
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func (as alwaysSampleSampler) Description() string {
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return alwaysSamplerDescription
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}
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var _ Sampler = alwaysSampleSampler{}
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func AlwaysSampleSampler() Sampler {
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return alwaysSampleSampler{}
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}
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