/// <summary>
/// Get the recent upload pagination length for a user and performs business logic to check for user existence.
/// Retries operation when there is an exception and logs all actions.
/// </summary>
/// <param name="username">User to retrieve pagination length from.</param>
/// <param name="ipAddress">Ipaddress for logging.</param>
/// <param name="failureCount">Current failure count of the operation.</param>
/// <param name="ex">Exception that is thrown.</param>
/// <returns>int that represents pagination size.</returns>
public async Task <int> GetRecentUploadPaginationSizeAsync(string username, string ipAddress, int failureCount, Exception ex)
{
// Escape condition for recursive call if exception is thrown.
if (failureCount >= Constants.OperationRetry)
{
throw ex;
}
// Pagination size to return.
int paginationSize = 0;
try
{
// Check that the user exists.
var userExists = await _userManagementService.CheckUserExistenceAsync(username).ConfigureAwait(false);
if (!userExists)
{
throw new ArgumentException(Constants.UsernameDNE);
}
paginationSize = await _uploadService.GetRecentPaginationSizeAsync(username).ConfigureAwait(false);
}
catch (Exception e)
{
// Log everytime we catch an exception.
await _loggingManager.LogAsync(DateTime.UtcNow.ToString(Constants.LoggingFormatString),
Constants.GetRecentUploadPagination, username, ipAddress, e.ToString()).ConfigureAwait(false);
// Retry operation Constant.OperationRetry amount of times when there is exception.
await GetRecentUploadPaginationSizeAsync(username, ipAddress, ++failureCount, e).ConfigureAwait(false);
}
// Operation successfull, log that operation.
await _loggingManager.LogAsync(DateTime.UtcNow.ToString(Constants.LoggingFormatString),
Constants.GetRecentUploadPagination, username, ipAddress).ConfigureAwait(false);
return(paginationSize);
}