static CompleteParsing ParseRecipients(StartParsing message, IActorRef sender, CancellationToken cancellation)
{
cancellation.ThrowIfCancellationRequested();
using (var csvReader = new CsvReader(new StreamReader(File.OpenRead(message.DataPath))))
{
var batch = new List<IDictionary<string, string>>(BatchSize);
int numberOfParsedRecipients = 0;
while (csvReader.Read())
{
cancellation.ThrowIfCancellationRequested();
var recipientValues =
csvReader.FieldHeaders.Zip(csvReader.CurrentRecord,
(h, v) => new KeyValuePair<string, string>(h, v)).ToDictionary(p => p.Key, p => p.Value);
numberOfParsedRecipients++;
batch.Add(recipientValues);
if (numberOfParsedRecipients == message.RecipientLimit)
break;
if (numberOfParsedRecipients >= FailAfter)
throw new CsvBadDataException("Simulated failure occured.");
if (batch.Count < BatchSize)
continue;
sender.Tell(new ProcessParsedRecipients(batch.ToArray()));
batch.Clear();
}
cancellation.ThrowIfCancellationRequested();
if (batch.Count > 0)
sender.Tell(new ProcessParsedRecipients(batch.ToArray()));
return new CompleteParsing(numberOfParsedRecipients);
}
}
void OnStartParsing(StartParsing message)
{
logger.Debug("Started parsing...");
var sender = Sender;
Task.Factory.StartNew(() => ParseRecipients(message, sender, cancellationSource.Token),
cancellationSource.Token, TaskCreationOptions.LongRunning, TaskScheduler.Default)
.PipeTo(Self, sender);
Become(Parsing);
}
