/
option.go
80 lines (69 loc) · 2.07 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 Datadog, Inc.
package web
import (
"math"
"gopkg.in/DataDog/dd-trace-go.v1/ddtrace"
"gopkg.in/DataDog/dd-trace-go.v1/ddtrace/tracer"
"gopkg.in/DataDog/dd-trace-go.v1/internal"
"gopkg.in/DataDog/dd-trace-go.v1/internal/globalconfig"
)
type config struct {
serviceName string
spanOpts []ddtrace.StartSpanOption
finishOpts []ddtrace.FinishOption
analyticsRate float64
}
// Option represents an option that can be passed to New.
type Option func(*config)
func defaults(cfg *config) {
if internal.BoolEnv("DD_TRACE_GOJI_ANALYTICS_ENABLED", false) {
cfg.analyticsRate = 1.0
} else {
cfg.analyticsRate = globalconfig.AnalyticsRate()
}
cfg.serviceName = "http.router"
}
// WithServiceName sets the given service name for the returned mux.
func WithServiceName(name string) Option {
return func(cfg *config) {
cfg.serviceName = name
}
}
// WithSpanOptions applies the given set of options to the span started by the mux.
func WithSpanOptions(opts ...ddtrace.StartSpanOption) Option {
return func(cfg *config) {
cfg.spanOpts = opts
}
}
// NoDebugStack prevents stack traces from being attached to spans finishing
// with an error. This is useful in situations where errors are frequent and
// performance is critical.
func NoDebugStack() Option {
return func(cfg *config) {
cfg.finishOpts = append(cfg.finishOpts, tracer.NoDebugStack())
}
}
// WithAnalytics enables Trace Analytics for all started spans.
func WithAnalytics(on bool) Option {
return func(cfg *config) {
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) Option {
return func(cfg *config) {
if rate >= 0.0 && rate <= 1.0 {
cfg.analyticsRate = rate
} else {
cfg.analyticsRate = math.NaN()
}
}
}