public void ReceiveMessage(SqlTransaction transaction)
{
TransportMessage message = null;
Guid id;
try
{
using (var cmd = transaction.Connection.CreateCommand())
{
cmd.Transaction = transaction;
cmd.CommandText = string.Format(SqlCommands.SelectMessage, ListenerQueue);
var backoff = new BackOff(1000);
while (message == null)
{
using (var reader = cmd.ExecuteReader())
{
while (reader.Read())
{
message = new TransportMessage();
id = reader.GetGuid(0);
message.Id = id.ToString();
message.CorrelationId = reader.GetString(1) ?? string.Empty;
message.ReturnAddress = reader.GetString(2);
message.MessageIntent = (MessageIntentEnum)reader.GetByte(3);
message.HeadersString = reader.GetString(4) ?? string.Empty;
message.BodyString = reader.GetString(5) ?? string.Empty;
try
{
using (var bodyStream = new MemoryStream(Encoding.UTF8.GetBytes(message.BodyString)))
{
message.Body = MessageSerializer.Deserialize(bodyStream);
}
if (message.HeadersString.Length > 0)
{
using (var headersStream = new MemoryStream(Encoding.UTF8.GetBytes(message.HeadersString)))
{
message.Headers = MessageSerializer.Deserialize(headersStream).Cast<HeaderInfo>().ToList();
}
}
}
catch (Exception ex)
{
Logger.Error("Could not extract message data.", ex);
OnSerializationFailed(id, message, message.BodyString, message.HeadersString, ex);
return; // deserialization failed - no reason to try again, so don't throw
}
}
}
if (message == null)
{
backoff.Wait(() => true);
}
}
}
}
catch (Exception e)
{
Logger.Error("Error in receiving message from queue.", e);
throw; // Throw to rollback
}
finally
{
transactionWaitPool.Release(1);
releasedWaitLock = true;
}
// No message? That's okay
if (message == null)
{
return;
}
// Set the correlation Id
if (string.IsNullOrEmpty(message.IdForCorrelation))
{
message.IdForCorrelation = message.Id;
}
ProcessMessage(message);
}
public void ReceiveMessage(SqlTransaction transaction)
{
TransportMessage message = null;
Guid id;
try
{
using (var cmd = transaction.Connection.CreateCommand())
{
cmd.Transaction = transaction;
cmd.CommandText = string.Format(SqlCommands.SelectMessage, ListenerQueue);
var backoff = new BackOff(1000);
while (message == null)
{
using (var reader = cmd.ExecuteReader())
{
while (reader.Read())
{
message = new TransportMessage();
id = reader.GetGuid(0);
message.Id = id.ToString();
message.CorrelationId = reader.GetString(1) ?? string.Empty;
message.ReturnAddress = reader.GetString(2);
message.MessageIntent = (MessageIntentEnum)reader.GetByte(3);
message.HeadersString = reader.GetString(4) ?? string.Empty;
message.BodyString = reader.GetString(5) ?? string.Empty;
try
{
using (var bodyStream = new MemoryStream(Encoding.UTF8.GetBytes(message.BodyString)))
{
message.Body = MessageSerializer.Deserialize(bodyStream);
}
if (message.HeadersString.Length > 0)
{
using (var headersStream = new MemoryStream(Encoding.UTF8.GetBytes(message.HeadersString)))
{
message.Headers = MessageSerializer.Deserialize(headersStream).Cast <HeaderInfo>().ToList();
}
}
}
catch (Exception ex)
{
Logger.Error("Could not extract message data.", ex);
OnSerializationFailed(id, message, message.BodyString, message.HeadersString, ex);
return; // deserialization failed - no reason to try again, so don't throw
}
}
}
if (message == null)
{
backoff.Wait(() => true);
}
}
}
}
catch (Exception e)
{
Logger.Error("Error in receiving message from queue.", e);
throw; // Throw to rollback
}
finally
{
transactionWaitPool.Release(1);
releasedWaitLock = true;
}
// No message? That's okay
if (message == null)
{
return;
}
// Set the correlation Id
if (string.IsNullOrEmpty(message.IdForCorrelation))
{
message.IdForCorrelation = message.Id;
}
ProcessMessage(message);
}
