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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 Apache.Qpid.Client.Protocol.Listener;
using Apache.Qpid.Client.Transport;
using Apache.Qpid.Framing;
using log4net;
namespace Apache.Qpid.Client.Protocol
{
/// <summary>
/// A convenient interface to writing protocol frames.
/// </summary>
public class ProtocolWriter
{
private ILog _logger = LogManager.GetLogger(typeof(ProtocolWriter));
IProtocolWriter _protocolWriter;
IProtocolListener _protocolListener;
public ProtocolWriter(IProtocolWriter protocolWriter, IProtocolListener protocolListener)
{
_protocolWriter = protocolWriter;
_protocolListener = protocolListener;
}
public void WriteFrame(IDataBlock frame)
{
_protocolWriter.Write(frame);
}
/// <summary>
/// Convenience method that writes a frame to the protocol session and waits for
/// a particular response. Equivalent to calling getProtocolSession().write() then
/// waiting for the response.
/// </summary>
/// <param name="frame">the frame</param>
/// <param name="listener">the blocking listener. Note the calling thread will block.</param>
/// <param name="timeout">set the number of milliseconds to wait</param>
private AMQMethodEvent SyncWrite(AMQFrame frame, BlockingMethodFrameListener listener, int timeout)
{
try
{
_protocolListener.AddFrameListener(listener);
_protocolWriter.Write(frame);
return listener.BlockForFrame(timeout);
}
finally
{
_protocolListener.RemoveFrameListener(listener);
}
// When control resumes before this line, a reply will have been received
// that matches the criteria defined in the blocking listener
}
/// <summary>
/// Convenience method that writes a frame to the protocol session and waits for
/// a particular response. Equivalent to calling getProtocolSession().write() then
/// waiting for the response.
/// </summary>
/// <param name="frame">the frame</param>
/// <param name="responseType">the type of method response</param>
public AMQMethodEvent SyncWrite(AMQFrame frame, Type responseType)
{
// TODO: If each frame knew it's response type, then the responseType argument would
// TODO: not be neccesary.
return SyncWrite(frame, responseType, DefaultTimeouts.MaxWaitForSyncWriter);
}
/// <summary>
/// Convenience method that writes a frame to the protocol session and waits for
/// a particular response. Equivalent to calling getProtocolSession().write() then
/// waiting for the response.
/// </summary>
/// <param name="frame">the frame</param>
/// <param name="responseType">the type of method response</param>
/// <param name="timeout">set the number of milliseconds to wait</param>
/// <returns>set the number of milliseconds to wait</returns>
public AMQMethodEvent SyncWrite(AMQFrame frame, Type responseType, int timeout)
{
return SyncWrite(frame, new SpecificMethodFrameListener(frame.Channel, responseType), timeout);
}
}
}
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