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/*
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*
*/
using System;
using System.Collections;
using System.IO;
using System.Threading;
using Apache.Qpid.Client.Qms;
using Apache.Qpid.Client.Protocol;
using Apache.Qpid.Codec;
using Apache.Qpid.Framing;
namespace Apache.Qpid.Client.Transport.Socket.Blocking
{
/// <summary>
/// TCP Socket transport supporting both
/// SSL and non-SSL connections.
/// </summary>
public class BlockingSocketTransport : ITransport
{
// Configuration variables.
IProtocolListener _protocolListener;
// Runtime variables.
private ISocketConnector _connector;
private IoHandler _ioHandler;
private AmqpChannel _amqpChannel;
private ManualResetEvent _stopEvent;
public IProtocolWriter ProtocolWriter
{
get { return _amqpChannel; }
}
public string LocalEndpoint
{
get { return _connector.LocalEndpoint; }
}
/// <summary>
/// Connect to the specified broker
/// </summary>
/// <param name="broker">The broker to connect to</param>
/// <param name="connection">The AMQ connection</param>
public void Connect(IBrokerInfo broker, AMQConnection connection)
{
_stopEvent = new ManualResetEvent(false);
_protocolListener = connection.ProtocolListener;
_ioHandler = MakeBrokerConnection(broker, connection);
// todo: get default read size from config!
IProtocolDecoderOutput decoderOutput =
new ProtocolDecoderOutput(_protocolListener);
_amqpChannel =
new AmqpChannel(new ByteChannel(_ioHandler), decoderOutput);
// post an initial async read
_amqpChannel.BeginRead(new AsyncCallback(OnAsyncReadDone), this);
}
/// <summary>
/// Close the broker connection
/// </summary>
public void Close()
{
StopReading();
CloseBrokerConnection();
}
private void StopReading()
{
_stopEvent.Set();
}
private void CloseBrokerConnection()
{
if ( _ioHandler != null )
{
_ioHandler.Dispose();
_ioHandler = null;
}
if ( _connector != null )
{
_connector.Dispose();
_connector = null;
}
}
private IoHandler MakeBrokerConnection(IBrokerInfo broker, AMQConnection connection)
{
if ( broker.UseSSL )
{
_connector = new SslSocketConnector();
} else
{
_connector = new SocketConnector();
}
Stream stream = _connector.Connect(broker);
return new IoHandler(stream, connection.ProtocolListener);
}
private void OnAsyncReadDone(IAsyncResult result)
{
try
{
_amqpChannel.EndRead(result);
bool stopping = _stopEvent.WaitOne(0, false);
if ( !stopping )
_amqpChannel.BeginRead(new AsyncCallback(OnAsyncReadDone), null);
} catch ( Exception e )
{
// ignore any errors during closing
bool stopping = _stopEvent.WaitOne(0, false);
if ( !stopping )
_protocolListener.OnException(e);
}
}
#region IProtocolDecoderOutput Members
public void Write(object message)
{
_protocolListener.OnMessage((IDataBlock)message);
}
#endregion
}
}
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