hopefully a simple WCF beginners question..
I have a WCF channel factory, returning a service proxy TChannel:
// setup connection to server
var endpointAddress = new EndpointAddress(GetAppSetting("Endpoint"));
var tcpBinding = new NetTcpBinding();
channelFactory = new DuplexChannelFactory<IExcelServer>(this, tcpBinding, endpointAddress);
server = channelFactory.CreateChannel();
I would like to know when this service proxy changes state (Faulted, Closed etc). I can see events on the ChannelFactory itself, however I'm not sure this is the same as the channel itself, and even here stopping the server process doesn't cause a state transition.
This is a CallbackContract service, and in almost all interactions the server is sending data to the client. Therefore I can't simply rely on catching the failure when I make a server call from the client.
Should I send a heartbeat from client to server to trigger the state change?
The instance you get back from CreateChannel implements TChannel but also IClientChannel which has state changed events like Closed, Closing, Opened, etc.:
server = channelFactory.CreateChannel();
((IClientChannel)server).Faulted += FaultedHandler;
P.S: As you pointed out, the states of the channel and channel factory are related but not the same. If a Channel is faulted it doesn't necessarily mean that the ChannelFactory is.