81 lines
2.6 KiB
Go
81 lines
2.6 KiB
Go
// Copyright (c) 2017 Uber Technologies, Inc.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package jaeger
|
|
|
|
import (
|
|
"time"
|
|
)
|
|
|
|
// SamplerOption is a function that sets some option on the sampler
|
|
type SamplerOption func(options *samplerOptions)
|
|
|
|
// SamplerOptions is a factory for all available SamplerOption's
|
|
var SamplerOptions samplerOptions
|
|
|
|
type samplerOptions struct {
|
|
metrics *Metrics
|
|
maxOperations int
|
|
sampler Sampler
|
|
logger Logger
|
|
samplingServerURL string
|
|
samplingRefreshInterval time.Duration
|
|
}
|
|
|
|
// Metrics creates a SamplerOption that initializes Metrics on the sampler,
|
|
// which is used to emit statistics.
|
|
func (samplerOptions) Metrics(m *Metrics) SamplerOption {
|
|
return func(o *samplerOptions) {
|
|
o.metrics = m
|
|
}
|
|
}
|
|
|
|
// MaxOperations creates a SamplerOption that sets the maximum number of
|
|
// operations the sampler will keep track of.
|
|
func (samplerOptions) MaxOperations(maxOperations int) SamplerOption {
|
|
return func(o *samplerOptions) {
|
|
o.maxOperations = maxOperations
|
|
}
|
|
}
|
|
|
|
// InitialSampler creates a SamplerOption that sets the initial sampler
|
|
// to use before a remote sampler is created and used.
|
|
func (samplerOptions) InitialSampler(sampler Sampler) SamplerOption {
|
|
return func(o *samplerOptions) {
|
|
o.sampler = sampler
|
|
}
|
|
}
|
|
|
|
// Logger creates a SamplerOption that sets the logger used by the sampler.
|
|
func (samplerOptions) Logger(logger Logger) SamplerOption {
|
|
return func(o *samplerOptions) {
|
|
o.logger = logger
|
|
}
|
|
}
|
|
|
|
// SamplingServerURL creates a SamplerOption that sets the sampling server url
|
|
// of the local agent that contains the sampling strategies.
|
|
func (samplerOptions) SamplingServerURL(samplingServerURL string) SamplerOption {
|
|
return func(o *samplerOptions) {
|
|
o.samplingServerURL = samplingServerURL
|
|
}
|
|
}
|
|
|
|
// SamplingRefreshInterval creates a SamplerOption that sets how often the
|
|
// sampler will poll local agent for the appropriate sampling strategy.
|
|
func (samplerOptions) SamplingRefreshInterval(samplingRefreshInterval time.Duration) SamplerOption {
|
|
return func(o *samplerOptions) {
|
|
o.samplingRefreshInterval = samplingRefreshInterval
|
|
}
|
|
}
|