rate

type Config struct {
	// Identifier a distinguish between different limiters
	Identifier string
	// TickerInterval duration of report/fetch increment to/from redis
	TickerInterval time.Duration
	// Limit the expected rate
	Limit struct {
		// Upper the expected maximum speed
		Upper uint32
		// Lower used when lose redis
		Lower uint16
	}
	// Log setup logger, if enable and no logger set, zap.NewProduction() will used.
	Log struct {
		Enable bool
		Logger *zap.Logger
	}
}

type Limiter interface {
	// Close the limiter
	Close() error
	// UpdateRate dynamic update rate, err will returned if parameters set zero
	UpdateRate(limitUpper uint32, limitLower uint16) error
	// Allow whether event can happen at time now
	Allow()
}

type Redis interface {
	// Close the redis
	Close() error
	// IncrBy incr by value
	IncrBy(key string, value int64) *redis.IntCmd
	// Get by key
	Get(key string) *redis.StringCmd
}