/
option.go
101 lines (87 loc) · 2.83 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 echo
import (
"math"
"gopkg.in/DataDog/dd-trace-go.v1/internal"
"gopkg.in/DataDog/dd-trace-go.v1/internal/globalconfig"
"gopkg.in/DataDog/dd-trace-go.v1/internal/namingschema"
"gopkg.in/DataDog/dd-trace-go.v1/internal/normalizer"
)
const defaultServiceName = "echo"
type config struct {
serviceName string
analyticsRate float64
noDebugStack bool
isStatusError func(statusCode int) bool
headerTags *internal.LockMap
}
// Option represents an option that can be passed to Middleware.
type Option func(*config)
func defaults(cfg *config) {
cfg.serviceName = namingschema.ServiceName(defaultServiceName)
if internal.BoolEnv("DD_TRACE_ECHO_ANALYTICS_ENABLED", false) {
cfg.analyticsRate = 1.0
} else {
cfg.analyticsRate = math.NaN()
}
cfg.headerTags = globalconfig.HeaderTagMap()
cfg.isStatusError = isServerError
}
// WithServiceName sets the given service name for the system.
func WithServiceName(name string) Option {
return func(cfg *config) {
cfg.serviceName = name
}
}
// 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()
}
}
}
// 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.noDebugStack = true
}
}
// WithStatusCheck specifies a function fn which reports whether the passed
// statusCode should be considered an error.
func WithStatusCheck(fn func(statusCode int) bool) Option {
return func(cfg *config) {
cfg.isStatusError = fn
}
}
func isServerError(statusCode int) bool {
return statusCode >= 500 && statusCode < 600
}
// WithHeaderTags enables the integration to attach HTTP request headers as span tags.
// Warning:
// Using this feature can risk exposing sensitive data such as authorization tokens to Datadog.
// Special headers can not be sub-selected. E.g., an entire Cookie header would be transmitted, without the ability to choose specific Cookies.
func WithHeaderTags(headers []string) Option {
headerTagsMap := normalizer.HeaderTagSlice(headers)
return func(cfg *config) {
cfg.headerTags = internal.NewLockMap(headerTagsMap)
}
}