forked from open-telemetry/opentelemetry-go-contrib
/
config.go
80 lines (67 loc) · 2.19 KB
/
config.go
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// Copyright The OpenTelemetry Authors
//
// 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 jaegerremote // import "go.opentelemetry.io/contrib/samplers/jaeger_remote"
import "time"
const (
defaultPollingInterval = time.Minute
defaultSamplingRate = 0.001
)
type config struct {
service string
endpoint string
pollingInterval time.Duration
initialSamplingRate float64
}
func defaultConfig() *config {
return &config{
service: "",
endpoint: "http://localhost:5778",
pollingInterval: defaultPollingInterval,
initialSamplingRate: defaultSamplingRate,
}
}
type Option interface {
apply(config *config)
}
type optionFunc func(config *config)
var _ Option = optionFunc(nil)
func (fn optionFunc) apply(config *config) {
fn(config)
}
func WithService(service string) Option {
return optionFunc(func(config *config) {
config.service = service
})
}
// WithEndpoint sets the endpoint to retrieve the sampling strategy from.
// Defaults to http://localhost:5778
func WithEndpoint(endpoint string) Option {
return optionFunc(func(config *config) {
config.endpoint = endpoint
})
}
// WithPollingInterval sets the interval to poll for the sampling strategy
// file. Defaults to 1 minute.
func WithPollingInterval(pollingInterval time.Duration) Option {
return optionFunc(func(config *config) {
config.pollingInterval = pollingInterval
})
}
// WithInitialSamplingRate sets the sampling rate the sampler starts with,
// before it has fetched the strategy file. Defaults to 0.001.
func WithInitialSamplingRate(initialSamplingRate float64) Option {
return optionFunc(func(config *config) {
config.initialSamplingRate = initialSamplingRate
})
}