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// Copyright 2020 New Relic Corporation. All rights reserved.
// SPDX-License-Identifier: Apache-2.0
package internal
import "sync"
// rulesCache is designed to avoid applying url-rules, txn-name-rules, and
// segment-rules since regexes are expensive!
type rulesCache struct {
sync.RWMutex
cache map[rulesCacheKey]string
maxCacheSize int
}
type rulesCacheKey struct {
isWeb bool
inputName string
}
func newRulesCache(maxCacheSize int) *rulesCache {
return &rulesCache{
cache: make(map[rulesCacheKey]string, maxCacheSize),
maxCacheSize: maxCacheSize,
}
}
func (cache *rulesCache) find(inputName string, isWeb bool) string {
if nil == cache {
return ""
}
cache.RLock()
defer cache.RUnlock()
return cache.cache[rulesCacheKey{
inputName: inputName,
isWeb: isWeb,
}]
}
func (cache *rulesCache) set(inputName string, isWeb bool, finalName string) {
if nil == cache {
return
}
cache.Lock()
defer cache.Unlock()
if len(cache.cache) >= cache.maxCacheSize {
return
}
cache.cache[rulesCacheKey{
inputName: inputName,
isWeb: isWeb,
}] = finalName
}
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