protected override async Task <IBankResponse> CallBank(PayingAttempt payingAttempt, CancellationToken cancellationToken)
{
var neverChangingBankPaymentId = Guid.Parse("d6589823-2bfa-4e1a-9f3f-699cb9a0a0a2");
var response = new BankResponse(bankPaymentId: neverChangingBankPaymentId, gatewayPaymentId: payingAttempt.GatewayPaymentId, paymentStatus: BankPaymentStatus.Accepted);
_paymentIdsMapper.RememberMapping(new AcquiringBankPaymentId(neverChangingBankPaymentId), new GatewayPaymentId(response.GatewayPaymentId));
return(await Task.FromResult(response));
}
protected override async Task <IBankResponse> CallBank(PayingAttempt payingAttempt, CancellationToken cancellationToken)
{
// Simulate bank response delay
var delay = DelayProvider.Delays();
await Task.Delay(delay, cancellationToken);
// Call bank's service
var request = new BNPPaymentRequest(payingAttempt.GatewayPaymentId, payingAttempt.Amount, payingAttempt.Currency, payingAttempt.CardCvv, payingAttempt.CardExpiry, payingAttempt.CardNumber);
BNPResponse response = await _bnp.RespondToPayment(request);
_paymentIdsMapper.RememberMapping(new AcquiringBankPaymentId(response.BankPaymentId), new GatewayPaymentId(response.GatewayPaymentId));
return(AdaptToBankResponse(response));
}
public async Task <IBankResponse> RespondToPaymentAttempt(PayingAttempt paymentAttempt, CancellationToken cancellationToken)
{
// Connection to bank
var policy = Policy.Handle <FailedConnectionToBankException>()
.WaitAndRetryAsync(3, retry => TimeSpan.FromMilliseconds(Math.Pow(2, retry)));
var policyResult = await policy.ExecuteAndCaptureAsync(async() => await Connect());
if (!policyResult.Result)
{
return(new BankDoesNotRespond(paymentAttempt.GatewayPaymentId));
}
return(await CallBank(paymentAttempt, cancellationToken));
}
protected abstract Task <IBankResponse> CallBank(PayingAttempt payingAttempt, CancellationToken cancellationToken);
private CircuitBreaker CircuitBreaker(IAdaptToBank bankAdapter, Payment payment, PayingAttempt payingAttempt)
{
var bankAdapterType = bankAdapter.GetType();
if (!_circuitBreakers.TryGet(bankAdapterType, out CircuitBreaker circuitBreaker))
{
circuitBreaker = MakeCircuitBreaker(bankAdapter, payment);
_circuitBreakers.Add(bankAdapterType, circuitBreaker);
}
return(circuitBreaker);
}
public PaymentRequestBuffer(IAdaptToBank bankAdapter, PayingAttempt payingAttempt, Payment payment)
{
BankAdapter = bankAdapter;
PayingAttempt = payingAttempt;
Payment = payment;
}
