// Returns vulcan library compatible middleware
func (r *ConnLimit) NewMiddleware() (middleware.Middleware, error) {
mapper, err := limit.VariableToMapper(r.Variable)
if err != nil {
return nil, err
}
return connlimit.NewConnectionLimiter(mapper, r.Connections)
}
// Returns vulcan library compatible middleware
func (r *RateLimit) NewMiddleware() (middleware.Middleware, error) {
mapper, err := limit.VariableToMapper(r.Variable)
if err != nil {
return nil, err
}
rate := tokenbucket.Rate{Units: int64(r.Requests), Period: time.Second * time.Duration(r.PeriodSeconds)}
return tokenbucket.NewTokenLimiterWithOptions(mapper, rate, tokenbucket.Options{Burst: r.Burst})
}
func NewConnLimit(connections int64, variable string) (*ConnLimit, error) {
if _, err := limit.VariableToMapper(variable); err != nil {
return nil, err
}
if connections < 0 {
return nil, fmt.Errorf("Connections should be > 0, got %d", connections)
}
return &ConnLimit{
Connections: connections,
Variable: variable,
}, nil
}
func NewRateLimit(requests int, variable string, burst int64, periodSeconds int) (*RateLimit, error) {
if _, err := limit.VariableToMapper(variable); err != nil {
return nil, err
}
if requests <= 0 {
return nil, fmt.Errorf("Requests should be > 0, got %d", requests)
}
if burst < 0 {
return nil, fmt.Errorf("Burst should be >= 0, got %d", burst)
}
if periodSeconds <= 0 {
return nil, fmt.Errorf("Period seconds should be > 0, got %d", periodSeconds)
}
return &RateLimit{
Requests: requests,
Variable: variable,
Burst: burst,
PeriodSeconds: periodSeconds,
}, nil
}