Netty core doesn't detect an idle channel at all. There should be a ChannelHandler which triggers some action when a connection becomes idle. For example, a connection which didn't send a certain message for a certain amount of time could be closed automatically. To fulfill this requirement,
1) A user should be able to define what an 'idle' channel is. (sensible default would be 'no communication for 10 seconds' for example)
2) A user should be able to define what action should be performed when a channel becomes idle. (sensible default would be disconnection for example)
3) A user should be able to add multiple instances of this handler so that one can enforce multiple rules.