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15bfc5bb12
Also fixes example module paths so that they use the vanity URL instead of the github URL. [Closes #184]
45 lines
1.5 KiB
Go
45 lines
1.5 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 "go.opentelemetry.io/otel/api/core"
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type Sampler interface {
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// ShouldSample returns a Decision that contains a decision whether to sample
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// or not sample the span to be created. Decision is based on a Sampler specific
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// algorithm that takes into account one or more input parameters.
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ShouldSample(
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sc core.SpanContext,
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remote bool,
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traceID core.TraceID,
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spanID uint64,
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spanName string,
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) Decision
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// Description returns of the sampler. It contains its name or short description
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// and its configured properties.
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// For example 'ProbabilitySampler:{0.00001}'
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Description() string
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}
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type Decision struct {
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// Sampled is set true if the span should be sampled.
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Sampled bool
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// Attributes provides insight into Sample r's decision process.
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// It could be empty slice or nil if no attributes are recorded by the sampler.
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Attributes []core.KeyValue
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}
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