Function RegexpCacheInit

pkg/exprhelpers/helpers.go:142–184

(filename string, cacheCfg enrichment.DataProvider)

}

func RegexpCacheInit(filename string, cacheCfg enrichment.DataProvider) error {
	// cache is explicitly disabled
	if cacheCfg.Cache != nil && !*cacheCfg.Cache {
		return nil
	}
	// cache is implicitly disabled if no cache config is provided
	if cacheCfg.Strategy == "" && cacheCfg.TTL == nil && cacheCfg.Size == nil {
		return nil
	}
	// cache is enabled

	size := 50
	if cacheCfg.Size != nil {
		size = *cacheCfg.Size
	}

	gc := gcache.New(size)

	strategy := "LRU"
	if cacheCfg.Strategy != "" {
		strategy = cacheCfg.Strategy
	}

	switch strategy {
	case "LRU":
		gc = gc.LRU()
	case "LFU":
		gc = gc.LFU()
	case "ARC":
		gc = gc.ARC()
	default:
		return fmt.Errorf("unknown cache strategy '%s'", strategy)
	}

	if cacheCfg.TTL != nil {
		gc.Expiration(*cacheCfg.TTL)
	}

	cache := gc.Build()
	dataFileRegexCache[filename] = cache

	return nil
}

// UpdateCacheMetrics is called directly by the prom handler
func UpdateRegexpCacheMetrics() {