/// <summary>
/// Dispose the callback instance if its not null
/// and assign it null value
/// </summary>
private void DisposeCallbackIfNeed()
{
if (callbackInstance != null)
{
callbackInstance.Dispose();
callbackInstance = null;
}
}
/// <summary>
/// open the p2p channel and register for online and offline events
/// </summary>
/// <param name="endpointConfigName">The configuration name used for the endpoint</param>
private void OpenCore(string endpointConfigName)
{
callbackInstance = new SynchronizationCallback(businessLogic, synchronizationMode, reSyncInterval);
//Open p2p channel
channelFactory = new DuplexChannelFactory <ISynchronizedState>(callbackInstance, endpointConfigName);
channelFactory.Closing += InvokeCommunicationStateChanged;
channelFactory.Closed += InvokeCommunicationStateChanged;
channelFactory.Faulted += InvokeCommunicationStateChanged;
channelFactory.Opened += InvokeCommunicationStateChanged;
channelFactory.Opening += InvokeCommunicationStateChanged;
if (UseGenericResolver)
{
channelFactory.AddGenericResolver();
}
channelFactory.BeginOpen(ar =>
{
try
{
channelFactory.EndOpen(ar);
}
catch (Exception exception)
{
LogManager.GetCurrentClassLogger().Fatal(exception);
return;
}
synchronizedStateProxy = channelFactory.CreateChannel();
channel = new ChannelWrapper((IClientChannel)synchronizedStateProxy);
callbackInstance.Proxy = synchronizedStateProxy;
RegisterProxyEvent(channel);
/*
* both receive online event but then the second participant receive Exception:
* "Cannot make a call on this channel because a call to Open() is in progress."
* when calling SynchronizationCallback.BeginSynchronization() from Online event handler ,
* this is because of issue of raising the Online event prior to the Opened state set.
**/
//The Online event not raised on the first participant that is already registered
channel.BeginOpen(ar2 =>
{
try
{
channel.EndOpen(ar2);
LogManager.GetCurrentClassLogger().Debug("channel opened");
}
catch (Exception exception)
{
LogManager.GetCurrentClassLogger().Fatal(exception);
}
}, null);
}, null);
}