table-driven-methods.go

func execute(subject string, msg []byte, reply string) {

	logic := map[string]func(){
		"GETBALANCE":     func() { getBalance(msg, reply) },
		"GETUSER": func() { getUser(msg, reply) },
		"GETWALLET":  func() { getWallet(msg, reply) },
	}

	fn, ok := logic[subject]

	if !ok {
    //key not exists
		return
	}

	fn()
	return
}