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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.
*/
namespace Apache.Qpid.Channel
{
using System;
using System.ServiceModel;
using System.ServiceModel.Channels;
using System.Threading;
using System.Collections.Generic;
using System.Collections.ObjectModel;
class AmqpChannelListener : ChannelListenerBase<IInputChannel>
{
MessageEncoderFactory messageEncoderFactory;
AmqpTransportBindingElement bindingElement;
AmqpChannelProperties channelProperties;
BindingContext bindingContext;
bool shared;
int prefetchLimit;
long maxBufferPoolSize;
Uri uri;
AmqpTransportChannel amqpTransportChannel;
delegate IInputChannel AsyncOnAcceptCaller (TimeSpan timeout);
AsyncOnAcceptCaller asyncOnAcceptCaller;
ManualResetEvent acceptWaitEvent;
internal AmqpChannelListener(AmqpTransportBindingElement bindingElement, BindingContext context)
: base(context.Binding)
{
this.bindingElement = bindingElement;
this.channelProperties = bindingElement.ChannelProperties.Clone();
this.bindingContext = context;
this.shared = bindingElement.Shared;
this.prefetchLimit = bindingElement.PrefetchLimit;
this.maxBufferPoolSize = bindingElement.MaxBufferPoolSize;
// TODO: review this. Should be unique hostname based
this.uri = context.ListenUriBaseAddress;
this.asyncOnAcceptCaller = new AsyncOnAcceptCaller(this.OnAcceptChannel);
this.acceptWaitEvent = new ManualResetEvent(false);
Collection<MessageEncodingBindingElement> messageEncoderBindingElements
= context.BindingParameters.FindAll<MessageEncodingBindingElement>();
if(messageEncoderBindingElements.Count > 1)
{
throw new InvalidOperationException("More than one MessageEncodingBindingElement was found in the BindingParameters of the BindingContext");
}
else if (messageEncoderBindingElements.Count == 1)
{
this.messageEncoderFactory = messageEncoderBindingElements[0].CreateMessageEncoderFactory();
}
else
{
this.messageEncoderFactory = new TextMessageEncodingBindingElement().CreateMessageEncoderFactory();
}
}
public override Uri Uri
{
get
{
return this.uri;
}
}
public override T GetProperty<T>()
{
T mep = messageEncoderFactory.Encoder.GetProperty<T>();
if (mep != null)
{
return mep;
}
if (typeof(T) == typeof(MessageVersion))
{
return (T)(object)messageEncoderFactory.Encoder.MessageVersion;
}
return base.GetProperty<T>();
}
protected override void OnOpen(TimeSpan timeout)
{
// check and freeze security properties now
AmqpSecurityMode mode = AmqpSecurityMode.None;
if (this.bindingElement.BindingSecurity != null)
{
mode = bindingElement.BindingSecurity.Mode;
}
this.channelProperties.AmqpSecurityMode = mode;
if (mode == AmqpSecurityMode.None)
{
return;
}
AmqpChannelHelpers.FindAuthenticationCredentials(this.channelProperties, this.bindingContext);
}
protected override IAsyncResult OnBeginOpen(TimeSpan timeout, AsyncCallback callback, object state)
{
throw new NotImplementedException("AmqpChannelListener OnBeginOpen");
//// return null;
}
protected override void OnEndOpen(IAsyncResult result)
{
throw new NotImplementedException("AmqpChannelListener OnEndOpen");
}
protected override bool OnWaitForChannel(TimeSpan timeout)
{
throw new NotImplementedException("AmqpChannelListener OnWaitForChannel");
}
protected override IAsyncResult OnBeginWaitForChannel(TimeSpan timeout, AsyncCallback callback, object state)
{
throw new NotImplementedException("AmqpChannelListener OnBeginWaitForChannel");
}
protected override bool OnEndWaitForChannel(IAsyncResult result)
{
throw new NotImplementedException("AmqpChannelListener OnEndWaitForChannel");
}
protected override IInputChannel OnAcceptChannel(TimeSpan timeout)
{
if (this.IsDisposed)
{
return null;
}
if (amqpTransportChannel == null)
{
// TODO: add timeout processing
amqpTransportChannel = new AmqpTransportChannel(this, this.channelProperties,
new EndpointAddress(uri), messageEncoderFactory.Encoder,
maxBufferPoolSize, this.shared, this.prefetchLimit);
return (IInputChannel)(object)amqpTransportChannel;
}
// Singleton channel. Subsequent Accepts wait until the listener is closed
acceptWaitEvent.WaitOne();
return null;
}
protected override IAsyncResult OnBeginAcceptChannel(TimeSpan timeout, AsyncCallback callback, object state)
{
return asyncOnAcceptCaller.BeginInvoke(timeout, callback, state);
}
protected override IInputChannel OnEndAcceptChannel(IAsyncResult result)
{
return asyncOnAcceptCaller.EndInvoke(result);
}
protected override void OnClose(TimeSpan timeout)
{
if (amqpTransportChannel != null)
{
amqpTransportChannel.Close();
}
acceptWaitEvent.Set();
}
protected override IAsyncResult OnBeginClose(TimeSpan timeout, AsyncCallback callback, object state)
{
throw new NotImplementedException("AmqpChannelListener OnBeginClose");
}
protected override void OnEndClose(IAsyncResult result)
{
throw new NotImplementedException("AmqpChannelListener OnEndClose");
}
protected override void OnAbort()
{
if (amqpTransportChannel != null)
amqpTransportChannel.Abort();
acceptWaitEvent.Set();
}
}
}
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