public static async Task LeaseStock([ActivityTrigger] LeaseStockCommand command, ILogger logger)
{
logger.LogWarning("Ordering item");
// Simulate a hard work ordering the item
await Task.Delay(100);
// Oh wait! If there was no stock, throw.
if (string.Equals(command.Item, "inexistent", StringComparison.InvariantCultureIgnoreCase))
{
logger.LogWarning("There was no stock aivalable!");
throw new InvalidOperationException("There is no stock of product 'unexistent'");
}
}
private static async Task <StockLeasedEvent> LeaseStock(IDurableOrchestrationContext context, LeaseStockCommand command)
{
// Start LeaseStock activity
await context.CallActivityAsync("Example2-Events-LeaseStock", command);
// Wait for completion
var stockLeasedTask = context.WaitForExternalEvent <StockLeasedEvent>($"stock-leased");
var stockLeaseDeniedTask = context.WaitForExternalEvent <StockLeaseDeniedEvent>($"stock-lease-denied");
var completedTask = await Task.WhenAny(
stockLeasedTask,
stockLeaseDeniedTask);
if (completedTask == stockLeaseDeniedTask)
{
throw new CompensationEventDetectedException(stockLeaseDeniedTask.Result);
}
return(stockLeasedTask.Result);
}
