/// <summary>
/// Initializes a new instance of the <see cref="WcfDualChannelClient{TChannel, TCallback}"/> class.
/// </summary>
/// <param name="endpoint">The endpoint at which the service is hosted.</param>
/// <param name="callback">The <typeparamref name="TCallback" /> object to use for the callback.</param>
/// <param name="callbackIdentifier">An identifier to use in the callback URI.</param>
/// <exception cref="ArgumentNullException">
/// <paramref name="endpoint" /> is null.
/// <para>or</para>
/// <paramref name="callback" /> is null.
/// </exception>
public WcfDualChannelClient(Uri endpoint, TCallback callback, string callbackIdentifier)
: base(MessageTransferType.Http, endpoint)
{
CallbackEndpoint = BuildCallbackUri(endpoint, callbackIdentifier);
_callbackHost = OpenCallbackHost(callback, CallbackEndpoint);
Endpoint.Behaviors.Add(new DualChannelBehavior(CallbackEndpoint));
}
private static WcfHost <TCallback> OpenCallbackHost(TCallback callbackObject, Uri callbackEndpoint)
{
WcfHost <TCallback> callbackChannel = null;
try
{
callbackChannel = new WcfHost <TCallback>(callbackObject, MessageTransferType.Http, callbackEndpoint);
callbackChannel.Open();
return(callbackChannel);
}
catch
{
try
{
(callbackChannel as IDisposable)?.Dispose();
}
catch (CommunicationObjectFaultedException)
{
callbackChannel.Abort();
}
throw;
}
}
