public IEnumerable <HistoryMessage> GetAllProcessedMessages(int?batchSize = null)
{
int count = 0;
var enumerator = _messageHistory.GetEnumerator();
while (enumerator.MoveNext() && count++ != batchSize)
{
var bookmark = enumerator.Current;
bookmark.QueueName = _queueName;
yield return(_messageHistory.ReadMessageWithId <HistoryMessage>(bookmark, _queueName, x =>
{
x.MovedToHistoryAt = _messageHistory.ForColumnType <DateTimeColumn>().Get("moved_to_history_at");
}));
}
}
public PersistentMessage Dequeue(string subqueue)
{
var enumerator = _messages.GetEnumerator(new StringValueIndex("by_sub_queue", subqueue));
while (enumerator.MoveNext())
{
var id = _messages.GetMessageId();
var status = (MessageStatus)_messages.ForColumnType <IntColumn>().Get("status");
_logger.Debug("Scanning incoming message {2} on '{0}/{1}' with status {3}",
_queueName, subqueue, id, status);
if (status != MessageStatus.ReadyToDeliver)
{
continue;
}
try
{
_messages.Update(() => _messages.ForColumnType <IntColumn>().Set("status", (int)MessageStatus.Processing));
}
catch (EsentErrorException e)
{
_logger.Debug("Write conflict on '{0}/{1}' for {2}, skipping message",
_queueName, subqueue, id);
if (e.Error == JET_err.WriteConflict)
{
continue;
}
throw;
}
var bookmark = enumerator.Current;
bookmark.QueueName = _queueName;
_changeNumberOfMessages(-1);
_logger.Debug("Dequeuing message {2} from '{0}/{1}'",
_queueName, subqueue, id);
return(_messages.ReadMessageWithId <PersistentMessage>(bookmark, _queueName, x =>
{
x.SubQueue = subqueue;
}));
}
return(null);
}
internal static TMessage ReadMessageWithId <TMessage>(this EsentTable table, MessageBookmark bookmark,
string queueName, Action <TMessage> action) where TMessage : PersistentMessage, new()
{
var message = table.ReadMessageWithId <TMessage>(bookmark, queueName);
action(message);
return(message);
}
