public async Task <Receipt> CalculateReceipt(string membershipId)
{
// Fan out
Task <double> rebate = _rebateApi.GetRebate(membershipId);
Task <double> subsidy = _subsidyApi.GetSubsidy(membershipId);
Task <double> discount = _discountApi.GetDiscount(membershipId);
// Fan in
double[] results = await Task.WhenAll(rebate, subsidy, discount);
return(new Receipt()
{
RebateAmount = results[0],
SubsidyAmount = results[1],
DiscountPercentage = results[2],
MembershipId = membershipId,
ReceiptId = Guid.NewGuid().ToString("N"),
FinalAmount = 123
});
}
public async Task <ReceiptModel> Handle(GetReceiptByMembershipId request, CancellationToken cancellationToken)
{
// Fan out
Task <double> rebate = _rebateApi.GetRebate(request._membershipId);
Task <double> subsidy = _subsidyApi.GetSubsidy(request._membershipId);
Task <double> discount = _discountApi.GetDiscount(request._membershipId);
// Fan in
double[] results = await Task.WhenAll(rebate, subsidy, discount);
// build new domain entity
var r = new Receipt(results[0], results[1], results[2]);
// project to query model
// Use imapper instead
return(new ReceiptModel()
{
DiscountPercentage = r.DiscountPercentage,
MembershipId = r.MembershipId,
ReceiptId = r.ReceiptId,
FinalAmount = r.Calculate()
});
}