forked from DataDog/dd-trace-go
/
option.go
67 lines (57 loc) · 1.7 KB
/
option.go
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// Unless explicitly stated otherwise all files in this repository are licensed
// under the Apache License Version 2.0.
// This product includes software developed at Datadog (https://www.datadoghq.com/).
// Copyright 2016-2020 Datadog, Inc.
package httprouter
import (
"math"
"gopkg.in/DataDog/dd-trace-go.v1/ddtrace"
"gopkg.in/DataDog/dd-trace-go.v1/internal/globalconfig"
)
type routerConfig struct {
serviceName string
spanOpts []ddtrace.StartSpanOption
analyticsRate float64
}
// RouterOption represents an option that can be passed to New.
type RouterOption func(*routerConfig)
func defaults(cfg *routerConfig) {
cfg.analyticsRate = globalconfig.AnalyticsRate()
cfg.serviceName = "http.router"
if svc := globalconfig.ServiceName(); svc != "" {
cfg.serviceName = svc
}
}
// WithServiceName sets the given service name for the returned router.
func WithServiceName(name string) RouterOption {
return func(cfg *routerConfig) {
cfg.serviceName = name
}
}
// WithSpanOptions applies the given set of options to the span started by the router.
func WithSpanOptions(opts ...ddtrace.StartSpanOption) RouterOption {
return func(cfg *routerConfig) {
cfg.spanOpts = opts
}
}
// WithAnalytics enables Trace Analytics for all started spans.
func WithAnalytics(on bool) RouterOption {
return func(cfg *routerConfig) {
if on {
cfg.analyticsRate = 1.0
} else {
cfg.analyticsRate = math.NaN()
}
}
}
// WithAnalyticsRate sets the sampling rate for Trace Analytics events
// correlated to started spans.
func WithAnalyticsRate(rate float64) RouterOption {
return func(cfg *routerConfig) {
if rate >= 0.0 && rate <= 1.0 {
cfg.analyticsRate = rate
} else {
cfg.analyticsRate = math.NaN()
}
}
}