go_payment_balancer

This library is used to split payments accross multiple gateways based on their weights.

Example

func main() {
	paymentsCount := 5000
	type Gateway struct {
		Id     int
		Title  string
		Weight int
	}
	var gateways = []Gateway{
		{
			Id:     1,
			Title:  "PayPal",
			Weight: 1,
		},
		{
			Id:     2,
			Title:  "MasterCard",
			Weight: 2,
		},
	}
	shouldIncrement := []bool{true, false} // This is to mimic user behavior, some might cancel payment
	b := go_payment_balancer.NewBalancer()
	for _, gateway := range gateways {
		b.AddGateway(gateway.Id, gateway.Weight)
	}
	i := 1
	for true {
		g, err := b.GetGatewayId()
		if err != nil {
			fmt.Println(err)
			return
		}
		if shouldIncrement[rand.Intn(len(shouldIncrement))] {
			b.IncrementGateway(g)
			i++
		}
		if b.TotalPayments() >= paymentsCount {
			break
		}
	}
	fmt.Println(b.Report())
}

In this example 1 out of every 3 payments will go through PayPal & 2 out of 3 payments will go through MasterCard.