82 lines
2.6 KiB
Go
82 lines
2.6 KiB
Go
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// Copyright (c) 2017 Uber Technologies, Inc.
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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 jaeger
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import (
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"time"
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)
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// SamplerOption is a function that sets some option on the sampler
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type SamplerOption func(options *samplerOptions)
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// SamplerOptions is a factory for all available SamplerOption's
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var SamplerOptions samplerOptions
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type samplerOptions struct {
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metrics *Metrics
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maxOperations int
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sampler Sampler
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logger Logger
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samplingServerURL string
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samplingRefreshInterval time.Duration
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}
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// Metrics creates a SamplerOption that initializes Metrics on the sampler,
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// which is used to emit statistics.
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func (samplerOptions) Metrics(m *Metrics) SamplerOption {
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return func(o *samplerOptions) {
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o.metrics = m
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}
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}
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// MaxOperations creates a SamplerOption that sets the maximum number of
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// operations the sampler will keep track of.
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func (samplerOptions) MaxOperations(maxOperations int) SamplerOption {
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return func(o *samplerOptions) {
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o.maxOperations = maxOperations
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}
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}
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// InitialSampler creates a SamplerOption that sets the initial sampler
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// to use before a remote sampler is created and used.
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func (samplerOptions) InitialSampler(sampler Sampler) SamplerOption {
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return func(o *samplerOptions) {
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o.sampler = sampler
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}
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}
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// Logger creates a SamplerOption that sets the logger used by the sampler.
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func (samplerOptions) Logger(logger Logger) SamplerOption {
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return func(o *samplerOptions) {
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o.logger = logger
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}
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}
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// SamplingServerURL creates a SamplerOption that sets the sampling server url
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// of the local agent that contains the sampling strategies.
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func (samplerOptions) SamplingServerURL(samplingServerURL string) SamplerOption {
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return func(o *samplerOptions) {
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o.samplingServerURL = samplingServerURL
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}
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}
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// SamplingRefreshInterval creates a SamplerOption that sets how often the
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// sampler will poll local agent for the appropriate sampling strategy.
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func (samplerOptions) SamplingRefreshInterval(samplingRefreshInterval time.Duration) SamplerOption {
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return func(o *samplerOptions) {
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o.samplingRefreshInterval = samplingRefreshInterval
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}
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}
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