public void HandleEventInstance(InterestPaid eventInstance)
{
if (null != eventInstance)
{
currentBalance += eventInstance.AmountPaid;
}
}
public void HandleEventInstance(InterestPaid eventInstance)
{
if (null != eventInstance)
{
_interestDue -= eventInstance.AmountPaid;
}
}
public ClassificationResponse.ClassificationResults ClassifyEventInstance(InterestPaid eventInstance)
{
if (null != eventInstance)
{
currentBalance += eventInstance.AmountPaid;
}
if (currentBalance >= threshold)
{
// Balance is above threshold
return(ClassificationResponse.ClassificationResults.Exclude);
}
else
{
return(ClassificationResponse.ClassificationResults.Include);
}
}
public static async Task PayInterestForSpecificAccount
([ActivityTrigger] IDurableActivityContext payInterestContext)
{
string accountNumber = payInterestContext.GetInput <string>();
#region Tracing telemetry
Activity.Current.AddTag("Account Number", accountNumber);
#endregion
Command cmdPayInterest = new Command(
new CommandAttribute("Bank",
"Pay Interest",
payInterestContext.InstanceId)
);
if (!string.IsNullOrWhiteSpace(accountNumber))
{
string result = "";
await cmdPayInterest.InitiateStep(AccountCommands.COMMAND_STEP_PAY_INTEREST,
"Bank",
"Account",
accountNumber);
// 1- Get interest due...
Projection prjInterestDue = new Projection(
new ProjectionAttribute(
"Bank",
"Account",
accountNumber,
nameof(InterestDue)
)
);
// get the interest owed / due as now
InterestDue interestDue = await prjInterestDue.Process <InterestDue>();
if (null != interestDue)
{
// pay the interest
decimal amountToPay = decimal.Round(interestDue.Due, 2, MidpointRounding.AwayFromZero);
if (amountToPay != 0.00M)
{
EventStream bankAccountEvents = new EventStream(
new EventStreamAttribute(
"Bank",
"Account",
accountNumber
)
);
InterestPaid evInterestPaid = new InterestPaid()
{
AmountPaid = decimal.Round(interestDue.Due, 2, MidpointRounding.AwayFromZero),
Commentary = $"Interest due {interestDue.Due} as at {interestDue.CurrentSequenceNumber}"
};
await bankAccountEvents.AppendEvent(evInterestPaid);
result = $"Interest paid: {evInterestPaid.AmountPaid} ({evInterestPaid.Commentary})";
}
}
await cmdPayInterest.StepCompleted(AccountCommands.COMMAND_STEP_PAY_INTEREST,
result,
"Bank",
"Account",
accountNumber);
}
}
public static async void PayInterestCommandStep
([EventGridTrigger] EventGridEvent egStepTriggered)
{
// Get the parameters from the event grid trigger
// (Payload is a Command Step Initiated)
Command cmdApplyAccruedInterest = new Command(egStepTriggered);
if (null != cmdApplyAccruedInterest)
{
string result = $"No accrued interest paid";
if (cmdApplyAccruedInterest.CommandName == COMMAND_STEP_PAY_INTEREST)
{
// Get the parameter for account number
string accountNumber = (string)(await cmdApplyAccruedInterest.GetParameterValue("Account Number"));
if (!string.IsNullOrWhiteSpace(accountNumber))
{
// 1- Get interest due...
Projection prjInterestDue = new Projection(
new ProjectionAttribute(
"Bank",
"Account",
accountNumber,
nameof(InterestDue)
)
);
// get the interest owed / due as now
InterestDue interestDue = await prjInterestDue.Process <InterestDue>();
if (null != interestDue)
{
// pay the interest
decimal amountToPay = decimal.Round(interestDue.Due, 2, MidpointRounding.AwayFromZero);
if (amountToPay != 0.00M)
{
EventStream bankAccountEvents = new EventStream(
new EventStreamAttribute(
"Bank",
"Account",
accountNumber
)
);
InterestPaid evInterestPaid = new InterestPaid()
{
AmountPaid = decimal.Round(interestDue.Due, 2, MidpointRounding.AwayFromZero),
Commentary = $"Interest due {interestDue.Due} as at {interestDue.CurrentSequenceNumber}"
};
await bankAccountEvents.AppendEvent(evInterestPaid);
result = $"Interest of {evInterestPaid.AmountPaid} paid for account {accountNumber} ";
}
}
}
}
// mark this step as complete
await cmdApplyAccruedInterest.StepCompleted(COMMAND_STEP_PAY_INTEREST, result);
}
}
public static async Task <bool> PayInterestCommandStep
([ActivityTrigger] IDurableActivityContext setOverdraftContext)
{
string result = "";
CommandAttribute payload = setOverdraftContext.GetInput <CommandAttribute>();
Command cmdApplyAccruedInterest = null;
if (payload == null)
{
cmdApplyAccruedInterest = new Command(payload);
}
else
{
cmdApplyAccruedInterest = new Command(new CommandAttribute("Bank", "Apply Accrued Interest"));
}
string accountNumber = (string)(await cmdApplyAccruedInterest.GetParameterValue("Account Number"));
int overdraftSequenceNumber = 0;
var overdraftSeqNoParam = await cmdApplyAccruedInterest.GetParameterValue("Overdraft Event Sequence Number");
if (overdraftSeqNoParam != null)
{
overdraftSequenceNumber = (int)(overdraftSeqNoParam);
}
if (!string.IsNullOrWhiteSpace(accountNumber))
{
// 1- Get interest due...
Projection prjInterestDue = new Projection(
new ProjectionAttribute(
"Bank",
"Account",
accountNumber,
nameof(InterestDue)
)
);
// get the interest owed / due as now
InterestDue interestDue = await prjInterestDue.Process <InterestDue>();
if (null != interestDue)
{
// pay the interest
decimal amountToPay = decimal.Round(interestDue.Due, 2, MidpointRounding.AwayFromZero);
if (amountToPay != 0.00M)
{
EventStream bankAccountEvents = new EventStream(
new EventStreamAttribute(
"Bank",
"Account",
accountNumber
)
);
InterestPaid evInterestPaid = new InterestPaid()
{
AmountPaid = decimal.Round(interestDue.Due, 2, MidpointRounding.AwayFromZero),
Commentary = $"Interest due {interestDue.Due} as at {interestDue.CurrentSequenceNumber}"
};
await bankAccountEvents.AppendEvent(evInterestPaid);
result = $"Interest of {evInterestPaid.AmountPaid} paid for account {accountNumber} ";
}
if (interestDue.CurrentSequenceNumber > overdraftSequenceNumber)
{
// May indicate a concurrency issue
return(false);
}
}
}
return(true);
}
public static async Task <HttpResponseMessage> PayInterestRun(
[HttpTrigger(AuthorizationLevel.Function, "POST", Route = @"PayInterest/{accountnumber}")] HttpRequestMessage req,
string accountnumber,
[EventStream("Bank", "Account", "{accountnumber}")] EventStream bankAccountEvents,
[Projection("Bank", "Account", "{accountnumber}", nameof(InterestDue))] Projection prjInterestDue,
[Projection("Bank", "Account", "{accountnumber}", nameof(Balance))] Projection prjBankAccountBalance,
[Projection("Bank", "Account", "{accountnumber}", nameof(OverdraftLimit))] Projection prjBankAccountOverdraft)
{
// Set the start time for how long it took to process the message
DateTime startTime = DateTime.UtcNow;
if (!await bankAccountEvents.Exists())
{
// You cannot pay interest if the account does not exist
return(req.CreateResponse <ProjectionFunctionResponse>(System.Net.HttpStatusCode.Forbidden,
ProjectionFunctionResponse.CreateResponse(startTime,
true,
$"Account {accountnumber} does not exist",
0),
FunctionResponse.MEDIA_TYPE));
}
// get the interest owed / due as now
InterestDue interestDue = await prjInterestDue.Process <InterestDue>();
if (null != interestDue)
{
// if the interest due is negative we need to make sure the account has sufficient balance
if (interestDue.Due < 0.00M)
{
Balance balance = await prjBankAccountBalance.Process <Balance>();
if (null != balance)
{
decimal availableBalance = balance.CurrentBalance;
// is there an overdraft?
OverdraftLimit overdraft = await prjBankAccountOverdraft.Process <OverdraftLimit>();
if (null != overdraft)
{
availableBalance += overdraft.CurrentOverdraftLimit;
}
if (availableBalance < interestDue.Due)
{
// can't pay the interest
return(req.CreateResponse <ProjectionFunctionResponse>(System.Net.HttpStatusCode.Forbidden,
ProjectionFunctionResponse.CreateResponse(startTime,
true,
$"Unable to pay interest of {interestDue.Due} as available balance is only {availableBalance}",
interestDue.CurrentSequenceNumber),
FunctionResponse.MEDIA_TYPE));
}
}
}
// pay the interest
decimal amountToPay = decimal.Round(interestDue.Due, 2, MidpointRounding.AwayFromZero);
if (amountToPay != 0.00M)
{
InterestPaid evInterestPaid = new InterestPaid()
{
AmountPaid = decimal.Round(interestDue.Due, 2, MidpointRounding.AwayFromZero),
Commentary = $"Interest due {interestDue.Due} as at {interestDue.CurrentSequenceNumber}"
};
await bankAccountEvents.AppendEvent(evInterestPaid);
return(req.CreateResponse <ProjectionFunctionResponse>(System.Net.HttpStatusCode.OK,
ProjectionFunctionResponse.CreateResponse(startTime,
false,
evInterestPaid.Commentary,
interestDue.CurrentSequenceNumber),
FunctionResponse.MEDIA_TYPE));
}
else
{
return(req.CreateResponse <ProjectionFunctionResponse>(System.Net.HttpStatusCode.OK,
ProjectionFunctionResponse.CreateResponse(startTime,
false,
$"No interest due so none was paid out",
interestDue.CurrentSequenceNumber),
FunctionResponse.MEDIA_TYPE));
}
}
else
{
return(req.CreateResponse <ProjectionFunctionResponse>(System.Net.HttpStatusCode.Forbidden,
ProjectionFunctionResponse.CreateResponse(startTime,
true,
$"Unable to get interest due for account {accountnumber} for interest payment",
0),
FunctionResponse.MEDIA_TYPE
));
}
}
