/
globalconfig.go
95 lines (79 loc) · 2.55 KB
/
globalconfig.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 globalconfig stores configuration which applies globally to both the tracer
// and integrations.
package globalconfig
import (
"math"
"sync"
"gopkg.in/DataDog/dd-trace-go.v1/internal"
"github.com/google/uuid"
)
var cfg = &config{
analyticsRate: math.NaN(),
runtimeID: uuid.New().String(),
headersAsTags: internal.NewLockMap(map[string]string{}),
}
type config struct {
mu sync.RWMutex
analyticsRate float64
serviceName string
runtimeID string
headersAsTags *internal.LockMap
}
// AnalyticsRate returns the sampling rate at which events should be marked. It uses
// synchronizing mechanisms, meaning that for optimal performance it's best to read it
// once and store it.
func AnalyticsRate() float64 {
cfg.mu.RLock()
defer cfg.mu.RUnlock()
return cfg.analyticsRate
}
// SetAnalyticsRate sets the given event sampling rate globally.
func SetAnalyticsRate(rate float64) {
cfg.mu.Lock()
defer cfg.mu.Unlock()
cfg.analyticsRate = rate
}
// ServiceName returns the default service name used by non-client integrations such as servers and frameworks.
func ServiceName() string {
cfg.mu.RLock()
defer cfg.mu.RUnlock()
return cfg.serviceName
}
// SetServiceName sets the global service name set for this application.
func SetServiceName(name string) {
cfg.mu.Lock()
defer cfg.mu.Unlock()
cfg.serviceName = name
}
// RuntimeID returns this process's unique runtime id.
func RuntimeID() string {
cfg.mu.RLock()
defer cfg.mu.RUnlock()
return cfg.runtimeID
}
// HeaderTagMap returns the mappings of headers to their tag values
func HeaderTagMap() *internal.LockMap {
return cfg.headersAsTags
}
// HeaderTag returns the configured tag for a given header.
// This function exists for testing purposes, for performance you may want to use `HeaderTagMap`
func HeaderTag(header string) string {
return cfg.headersAsTags.Get(header)
}
// SetHeaderTag adds config for header `from` with tag value `to`
func SetHeaderTag(from, to string) {
cfg.headersAsTags.Set(from, to)
}
// HeaderTagsLen returns the length of globalconfig's headersAsTags map, 0 for empty map
func HeaderTagsLen() int {
return cfg.headersAsTags.Len()
}
// ClearHeaderTags assigns headersAsTags to a new, empty map
// It is invoked when WithHeaderTags is called, in order to overwrite the config
func ClearHeaderTags() {
cfg.headersAsTags.Clear()
}