public async Task <Counter> ProcessRequestAsync(ThrottlerItem throttlerItem, ThrottleRule rule, CancellationToken cancellationToken)
{
Counter counter;
using (await _asyncLock.WriterLockAsync(throttlerItem.GenerateCounterKey()))
{
var entry = await _counterStore.GetAsync(throttlerItem, cancellationToken);
if (entry.HasValue)
{
// entry has not expired
if (entry.Value.Timestamp + rule.TimeWindow >= _systemClock.UtcNow)
{
// increment request count
var totalCount = entry.Value.Count + 1;
counter = new Counter(entry.Value.Timestamp, totalCount);
}
else
{
counter = new Counter(_systemClock.UtcNow, 1);
}
}
else
{
counter = new Counter(_systemClock.UtcNow, 1);
}
await _counterStore.SetAsync(throttlerItem, counter, rule.TimeWindow, cancellationToken);
}
return(counter);
}
public async Task <IEnumerable <Event> > ProcessAsync(Event evnt)
{
var notYetAccountedFor = evnt.GetBody <OrderItemsNotYetAccountedFor>();
var keyValue = notYetAccountedFor.ProductQuantities.First();
var productId = keyValue.Key;
var quantity = keyValue.Value;
var inventory = await _inventoryStore.GetAsync(Constants.InventoryCounterName, productId);
var events = new List <Event>();
// remove item since it will be dealt with
notYetAccountedFor.ProductQuantities.Remove(keyValue.Key);
// if out of stock, raise out of stock
if (quantity > inventory)
{
Trace.TraceInformation("OrderItemInventoryActor - Item out of stock");
events.Add(new Event(new ProductOutOfStock()
{
ProductId = productId,
Quantity = keyValue.Value
}));
events.Add(new Event(new ItemOutOfStockForOrder()
{
OrderId = notYetAccountedFor.OrderId,
ProductId = productId,
Quantity = quantity
}));
notYetAccountedFor.AnyOutOfStock = true;
}
else
{
// decrement repo
await _inventoryStore.IncrementAsync(Constants.InventoryCounterName,
productId, -quantity);
Trace.TraceInformation("OrderItemInventoryActor - Item in stock");
}
if (notYetAccountedFor.ProductQuantities.Count > 0)
{
// put back in the queue
events.Add(new Event(new OrderItemsNotYetAccountedFor()
{
OrderId = notYetAccountedFor.OrderId,
AnyOutOfStock = notYetAccountedFor.AnyOutOfStock,
ProductQuantities = notYetAccountedFor.ProductQuantities
}));
}
if (notYetAccountedFor.ProductQuantities.Count == 0)
{
if (notYetAccountedFor.AnyOutOfStock)
{
// TODO: cant remember what needs to be done ;)
}
else
{
events.Add(new Event(new OrderInventoryCheckCompleted()
{
OrderId = notYetAccountedFor.OrderId
}));
}
}
return(events);
}