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option.go
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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 elastic
import (
"math"
"net/http"
"gopkg.in/DataDog/dd-trace-go.v1/internal"
"gopkg.in/DataDog/dd-trace-go.v1/internal/namingschema"
)
const defaultServiceName = "elastic.client"
type clientConfig struct {
serviceName string
spanName string
transport *http.Transport
analyticsRate float64
resourceNamer func(url, method string) string
}
// ClientOption represents an option that can be used when creating a client.
type ClientOption func(*clientConfig)
func defaults(cfg *clientConfig) {
cfg.serviceName = namingschema.ServiceNameOverrideV0(defaultServiceName, defaultServiceName)
cfg.spanName = namingschema.OpName(namingschema.ElasticSearchOutbound)
cfg.transport = http.DefaultTransport.(*http.Transport)
cfg.resourceNamer = quantize
// cfg.analyticsRate = globalconfig.AnalyticsRate()
if internal.BoolEnv("DD_TRACE_ELASTIC_ANALYTICS_ENABLED", false) {
cfg.analyticsRate = 1.0
} else {
cfg.analyticsRate = math.NaN()
}
}
// WithServiceName sets the given service name for the client.
func WithServiceName(name string) ClientOption {
return func(cfg *clientConfig) {
cfg.serviceName = name
}
}
// WithTransport sets the given transport as an http.Transport for the client.
func WithTransport(t *http.Transport) ClientOption {
return func(cfg *clientConfig) {
cfg.transport = t
}
}
// WithAnalytics enables Trace Analytics for all started spans.
func WithAnalytics(on bool) ClientOption {
return func(cfg *clientConfig) {
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) ClientOption {
return func(cfg *clientConfig) {
if rate >= 0.0 && rate <= 1.0 {
cfg.analyticsRate = rate
} else {
cfg.analyticsRate = math.NaN()
}
}
}
// WithResourceNamer specifies a quantizing function which will be used to obtain a resource name for a given
// ElasticSearch request, using the request's URL and method. Note that the default quantizer obfuscates
// IDs and indexes and by replacing it, sensitive data could possibly be exposed, unless the new quantizer
// specifically takes care of that.
func WithResourceNamer(namer func(url, method string) string) ClientOption {
return func(cfg *clientConfig) {
cfg.resourceNamer = namer
}
}