/// <summary>
/// 주어진 결제 정보를 업데이트합니다.
/// </summary>
/// <param name="payment">결제</param>
public void Update(Payment payment)
{
payments.AddOrUpdate(
payment.TransactionId,
payment,
(transactionId, old) => payment);
}
/// <summary>
/// 주어진 결제를 새로 저장합니다.
/// </summary>
/// <param name="payment">결제</param>
/// <exception cref="DuplicatedKeyException">해당 결제의 TransactionId가 이미 저장되어 있습니다.</exception>
public void Add(Payment payment)
{
if (!payments.TryAdd(payment.TransactionId, payment))
{
throw new DuplicatedKeyException($"Duplicated transaction id {payment.TransactionId} detected.");
}
}