protected virtual async Task <List <T> > GetBatchOf100(List <Dictionary <string, AttributeValue> > modelKeyBatch)
{
var table = new T().GetTable();
var fullAds = new List <T>();
var fullAdBatchKeys = new Dictionary <string, KeysAndAttributes>
{
{
table,
new KeysAndAttributes {
Keys = modelKeyBatch
}
}
};
const int MAX_ATTEMPTS = 4;
int currentAttempt = 0;
BatchGetItemResponse response;
do
{
currentAttempt += 1;
var responseTask = Client.BatchGetItemAsync(fullAdBatchKeys).ConfigureAwait(false);
response = await responseTask;
fullAds.AddRange(response
.Responses[table]
.Select(x => JsonConvert.DeserializeObject <T>(Document.FromAttributeMap(x).ToJson())));
if (response.UnprocessedKeys.Any())
{
var waitTime = ExponentialBackoff.GetWaitTime(currentAttempt, TimeSpan.FromSeconds(10), TimeSpan.FromMinutes(1));
Logging.Log($"Read capacity exceeded. Failed to get {response.UnprocessedKeys[table].Keys.Count} records. " +
$"Attempt {currentAttempt} of {MAX_ATTEMPTS}. Retrying in {waitTime.TotalSeconds} seconds.");
new Sleeper(Logging).Sleep(waitTime);
}
} while (response.UnprocessedKeys.Any() && currentAttempt < MAX_ATTEMPTS);
if (currentAttempt == MAX_ATTEMPTS)
{
throw new Exception($"Failed to read all items after {MAX_ATTEMPTS} attempts.");
}
return(fullAds);
}