private IList <ItemBuyBoxResponse> RequestItemsBuyBoxByProductApi(ILogService logger, IList <ItemDTO> items, AmazonApi api)
{
var results = new List <ItemBuyBoxResponse>();
var index = 0;
var step = 20;
var sleep = new StepSleeper(TimeSpan.FromSeconds(1), 10);
/*
* Maximum request quota Restore rate Hourly request quota
* 20 requests 10 items every second 36000 requests per hour
*/
while (index < items.Count)
{
var checkedItems = items.Skip(index).Take(step).ToList();
var resp = RetryHelper.ActionWithRetriesWithCallResult(() =>
api.GetCompetitivePricingForSKU(checkedItems.Select(i => i.SKU).ToList()),
logger);
if (resp.IsFail)
{
var message = resp.Message ?? "";
//Request is throttled ---> Amazon.OrdersApi.Runtime.MwsException: Request is throttled
//...
if (message.IndexOf("ServiceUnavailable", StringComparison.InvariantCultureIgnoreCase) >= 0 ||
message.IndexOf("throttled", StringComparison.InvariantCultureIgnoreCase) >= 0)
{
//do sleep
}
//NOTE: temporary do always
_log.Info("Sleep 5 min");
Thread.Sleep(5 * 60 * 1000);
}
else
{
foreach (var item in resp.Data)
{
results.Add(new ItemBuyBoxResponse()
{
ASIN = item.ASIN,
CheckedDate = DateTime.UtcNow,
Status = item.BuyBoxStatus ?? BuyBoxStatusCode.NoWinner,
WinnerPrice = item.LowestPrice,
});
}
index += step;
sleep.NextStep();
}
}
return(results);
}