func NewRatelimit(limit int64, duration time.Duration, redisHost string,
redisConnPoolSize int, redisPrefix string) *Ratelimit {
return &Ratelimit{
limit: limit,
duration: duration,
rs: redis.NewRedisStorage(redisHost, redisConnPoolSize, redisPrefix),
}
}
// Gets a new instance of LRCache, providing all the reqired params for Redis and LRU Cache
func NewLRCache(redisHost string, redisConnPoolSize int, redisPrefix string, size int) (*LRCache, error) {
result := &LRCache{
lruCache: nil,
redisCache: redis.NewRedisStorage(redisHost, redisConnPoolSize, redisPrefix),
}
// When evictning an item from the in-memoro LRU cache, save the item on redis as a second caching tier
result.onEvict = func(key interface{}, val interface{}) {
if str, ok := key.(string); ok {
result.redisCache.Set(str, val)
}
}
l, err := lru.NewWithEvict(size, result.onEvict)
result.lruCache = l
if err != nil {
return nil, err
}
return result, nil
}