/// <summary>
/// Receives notification of any IO exceptions on the connection.
///
/// <p/>Upon receipt of a connection closed exception or any IOException, the fail-over process is attempted. If the fail-over fails, then
/// all method listeners and the application connection object are notified of the connection failure exception.
///
/// <p/>All other exception types are propagated to all method listeners.
/// </summary>
public void OnException(Exception cause)
{
_log.Warn("public void OnException(Exception cause = " + cause + "): called");
// Ensure that the method listener set cannot be changed whilst this exception is propagated to all listeners. This also
// ensures that this exception is fully propagated to all listeners, before another one can be processed.
lock (_lock)
{
if (cause is AMQConnectionClosedException || cause is System.IO.IOException)
{
// Try a fail-over because the connection has failed.
FailoverState failoverState = AttemptFailover();
// Check if the fail-over has failed, in which case notify all method listeners of the exception.
// The application connection object is also notified of the failure of the connection with the exception.
if (failoverState == FailoverState.FAILED)
{
_log.Debug("Fail-over has failed. Notifying all method listeners of the exception.");
AMQException amqe = new AMQException("Protocol handler error: " + cause, cause);
PropagateExceptionToWaiters(amqe);
_connection.ExceptionReceived(cause);
}
}
// Notify all method listeners of the exception.
else
{
PropagateExceptionToWaiters(cause);
_connection.ExceptionReceived(cause);
}
}
}
private void MakeBrokerConnection(IBrokerInfo brokerDetail)
{
try
{
_stateManager = new AMQStateManager();
_protocolListener = new AMQProtocolListener(this, _stateManager);
_protocolListener.AddFrameListener(_stateManager);
/*
* // Currently there is only one transport option - BlockingSocket.
* String assemblyName = "Apache.Qpid.Client.Transport.Socket.Blocking.dll";
* String transportType = "Apache.Qpid.Client.Transport.Socket.Blocking.BlockingSocketTransport";
*
* // Load the transport assembly dynamically.
* _transport = LoadTransportFromAssembly(brokerDetail.getHost(), brokerDetail.getPort(), assemblyName, transportType);
*/
_transport = new BlockingSocketTransport();
// Connect.
_transport.Connect(brokerDetail, this);
_protocolWriter = new ProtocolWriter(_transport.ProtocolWriter, _protocolListener);
_protocolSession = new AMQProtocolSession(_transport.ProtocolWriter, _transport, this);
_protocolListener.ProtocolSession = _protocolSession;
// Now start the connection "handshake".
_transport.ProtocolWriter.Write(new ProtocolInitiation());
// Blocks until the connection has been opened.
_stateManager.AttainState(AMQState.CONNECTION_OPEN);
_failoverPolicy.attainedConnection();
// XXX: Again this should be changed to a suitable notify.
_connected = true;
}
catch (AMQException e)
{
_lastAMQException = e;
throw; // rethrow
}
}
private void MakeBrokerConnection(IBrokerInfo brokerDetail)
{
try
{
_stateManager = new AMQStateManager();
_protocolListener = new AMQProtocolListener(this, _stateManager);
_protocolListener.AddFrameListener(_stateManager);
/*
// Currently there is only one transport option - BlockingSocket.
String assemblyName = "Apache.Qpid.Client.Transport.Socket.Blocking.dll";
String transportType = "Apache.Qpid.Client.Transport.Socket.Blocking.BlockingSocketTransport";
// Load the transport assembly dynamically.
_transport = LoadTransportFromAssembly(brokerDetail.getHost(), brokerDetail.getPort(), assemblyName, transportType);
*/
_transport = new BlockingSocketTransport();
// Connect.
_transport.Connect(brokerDetail, this);
_protocolWriter = new ProtocolWriter(_transport.ProtocolWriter, _protocolListener);
_protocolSession = new AMQProtocolSession(_transport.ProtocolWriter, _transport, this);
_protocolListener.ProtocolSession = _protocolSession;
// Now start the connection "handshake".
_transport.ProtocolWriter.Write(new ProtocolInitiation());
// Blocks until the connection has been opened.
_stateManager.AttainState(AMQState.CONNECTION_OPEN);
_failoverPolicy.attainedConnection();
// XXX: Again this should be changed to a suitable notify.
_connected = true;
}
catch (AMQException e)
{
_lastAMQException = e;
throw; // rethrow
}
}
/// <summary>
/// Receives notification of any IO exceptions on the connection.
///
/// <p/>Upon receipt of a connection closed exception or any IOException, the fail-over process is attempted. If the fail-over fails, then
/// all method listeners and the application connection object are notified of the connection failure exception.
///
/// <p/>All other exception types are propagated to all method listeners.
/// </summary>
public void OnException(Exception cause)
{
_log.Warn("public void OnException(Exception cause = " + cause + "): called");
// Ensure that the method listener set cannot be changed whilst this exception is propagated to all listeners. This also
// ensures that this exception is fully propagated to all listeners, before another one can be processed.
lock (_lock)
{
if (cause is AMQConnectionClosedException || cause is System.IO.IOException)
{
// Try a fail-over because the connection has failed.
FailoverState failoverState = AttemptFailover();
// Check if the fail-over has failed, in which case notify all method listeners of the exception.
// The application connection object is also notified of the failure of the connection with the exception.
if (failoverState == FailoverState.FAILED)
{
_log.Debug("Fail-over has failed. Notifying all method listeners of the exception.");
AMQException amqe = new AMQException("Protocol handler error: " + cause, cause);
PropagateExceptionToWaiters(amqe);
_connection.ExceptionReceived(cause);
}
}
// Notify all method listeners of the exception.
else
{
PropagateExceptionToWaiters(cause);
_connection.ExceptionReceived(cause);
}
}
}
/// <summary>
/// Close all producers or consumers. This is called either in the error case or when closing the session normally.
/// <param name="amqe">the exception, may be null to indicate no error has occurred</param>
///
private void CloseProducersAndConsumers(AMQException amqe)
{
try
{
CloseProducers();
}
catch (QpidException e)
{
_logger.Error("Error closing session: " + e, e);
}
try
{
CloseConsumers(amqe);
}
catch (QpidException e)
{
_logger.Error("Error closing session: " + e, e);
}
}
/**
* Called when the server initiates the closure of the session
* unilaterally.
* @param e the exception that caused this session to be closed. Null causes the
*/
public void ClosedWithException(Exception e)
{
lock (_connection.FailoverMutex)
{
// An AMQException has an error code and message already and will be passed in when closure occurs as a
// result of a channel close request
SetClosed();
AMQException amqe;
if (e is AMQException)
{
amqe = (AMQException) e;
}
else
{
amqe = new AMQException("Closing session forcibly", e);
}
_connection.DeregisterSession(_channelId);
CloseProducersAndConsumers(amqe);
}
}
