/// <summary>
/// Generates unique row key for each entity in the <paramref name="entitiesBatch"/> before insert,
/// using <paramref name="generateRowKey"/>. If conflict accurs on insert,
/// increments retries counter up to <paramref name="maxRetriesCount"/> and regenerates all row keys
/// </summary>
public static async Task InsertBatchAndGenerateRowKeyAsync <T>(
this INoSQLTableStorage <T> storage,
IReadOnlyList <T> entitiesBatch,
GenerateRowKey <T> generateRowKey,
int maxRetriesCount = 1000)
where T : ITableEntity, new()
{
var retryNumber = 0;
UpdateRowKeys(entitiesBatch, generateRowKey, retryNumber);
while (true)
{
++retryNumber;
try
{
await storage.InsertAsync(entitiesBatch);
return;
}
catch (AggregateException ex)
when((ex.InnerExceptions[0] as StorageException)?.RequestInformation?.HttpStatusCode ==
(int)HttpStatusCode.Conflict && retryNumber <= maxRetriesCount)
{
UpdateRowKeys(entitiesBatch, generateRowKey, retryNumber);
}
catch (StorageException ex)
when(ex.RequestInformation.HttpStatusCode == (int)HttpStatusCode.Conflict && retryNumber <= maxRetriesCount)
{
UpdateRowKeys(entitiesBatch, generateRowKey, retryNumber);
}
}
}
private static void UpdateRowKeys <T>(IReadOnlyList <T> group, GenerateRowKey <T> generateRowKey, int retryNumber)
where T : ITableEntity
{
for (var itemNumber = 0; itemNumber < group.Count; ++itemNumber)
{
var entry = group[itemNumber];
entry.RowKey = generateRowKey(entry, retryNumber, itemNumber);
}
}