public void Handle(NetMQFrame[] sender, NetMQMessage message)
{
Logger.Debug("[Queue_SubscribeHandler] Received subscribe request.");
var requestId = message.Pop();
var context = message.Pop().ConvertToString();
var queueId = message.Pop().ConvertToString();
var subscriberId = message.Pop().ConvertToString();
var filter = message.Pop().ConvertToString();
var utcStartTime = message.PopDateTime();
var allocationSize = message.PopInt32();
var allocationTimeInMilliseconds = message.PopInt32();
var subscribe = new SubscribeToQueue(context,
queueId,
subscriberId,
filter,
utcStartTime, allocationSize, allocationTimeInMilliseconds);
var queuedEvents = _storage.Subscribe(subscribe);
var events = queuedEvents.Events;
var msg = new NetMQMessage();
msg.Append(sender);
msg.AppendEmptyFrame();
msg.Append(ResProtocol.ResClient01);
msg.Append(requestId);
msg.Append(ResCommands.QueuedEvents);
msg.Append(context);
msg.Append(queueId);
msg.Append(subscriberId);
msg.Append(DateTime.UtcNow.ToNetMqFrame());
msg.Append(queuedEvents.AllocationId.ToNetMqFrame());
var count = events.Length;
msg.Append(count.ToNetMqFrame());
foreach (var e in events)
{
msg.Append(e.EventId.ToByteArray());
msg.Append(e.Stream);
msg.Append(e.Context);
msg.Append(e.Sequence.ToNetMqFrame());
msg.Append(e.Timestamp.ToNetMqFrame());
msg.Append(e.TypeKey);
msg.Append(e.Headers.ToNetMqFrame());
msg.Append(e.Body);
}
var result = new QueuedMessagesFetched(msg);
while (!_outBuffer.Offer(result))
_spin.SpinOnce();
}
public QueuedEvents Subscribe(SubscribeToQueue request)
{
using (var connection = new SqlConnection(_connectionString))
using (var command = new SqlCommand("Queues_Subscribe", connection))
{
command.CommandType = CommandType.StoredProcedure;
command.Parameters.AddWithValue("Context", request.Context);
command.Parameters.AddWithValue("QueueId", request.QueueId);
command.Parameters.AddWithValue("SubscriberId", request.SubscriberId);
command.Parameters.AddWithValue("Filter", request.Filter);
command.Parameters.AddWithValue("StartTime", request.UtcQueueStartTime);
command.Parameters.AddWithValue("Count", request.AllocationSize);
command.Parameters.AddWithValue("AllocationTimeInMilliseconds", request.AllocationTimeoutInMilliseconds);
command.Connection.Open();
try
{
using (var reader = command.ExecuteReader())
{
var events = new List<EventInStorage>();
while (reader.Read())
{
var @event = readEventInStorage(reader, 0);
events.Add(@event);
}
reader.NextResult();
long? allocationId = null;
if (reader.Read())
{
var sqlInt64 = reader.GetSqlInt64(0);
allocationId = sqlInt64.IsNull ? (long?) null : sqlInt64.Value;
}
return new QueuedEvents(allocationId, events.ToArray());
}
}
catch (SqlException ex)
{
if (ex.Number == 2627) //pk violation
{
throw new QueueAlreadyExistsInContextWithDifferentFilterException(request.Context,
request.QueueId, request.Filter);
}
throw;
}
}
}
