/// <summary>
/// Enables retry policy to process.
/// </summary>
/// <param name="cancellationToken">The optional cancellation token.</param>
/// <returns>The processing retry result.</returns>
public async Task <RetryResult> ProcessAsync(CancellationToken cancellationToken = default)
{
State = TaskStates.Initializing;
var result = new RetryResult();
var retry = RetryPolicy?.CreateInstance() ?? new InternalRetryInstance();
State = TaskStates.Working;
while (true)
{
try
{
cancellationToken.ThrowIfCancellationRequested();
}
catch (OperationCanceledException)
{
State = TaskStates.Canceled;
throw;
}
catch (ObjectDisposedException)
{
State = TaskStates.Canceled;
throw;
}
try
{
await OnProcessAsync(cancellationToken);
Processing?.Invoke(this, new RetryEventArgs(retry.ProcessTime));
State = TaskStates.Done;
result.Success();
return(result);
}
catch (Exception ex)
{
State = TaskStates.WaitingToRetry;
result.Fail(ex);
try
{
ex = ExceptionHandler.GetException(ex);
}
catch (Exception)
{
State = TaskStates.Faulted;
throw;
}
if (ex != null)
{
State = TaskStates.Faulted;
throw ex;
}
}
var span = retry.Next();
if (!span.HasValue)
{
State = TaskStates.Faulted;
result.End();
return(result);
}
await Task.Delay(span.Value, cancellationToken);
State = TaskStates.Retrying;
}
}