CODEWITHSUNDEEP
javaniohashcodetreemapsocketchannel
Matthew
Matthew

Reputation: 3956

Maintaining a list of SocketChannels that are unique

I am using Java NIO and selectors to get instances of SocketChannels. I need to attach each instance of a SocketChannel that I get from the selector to an encryption key that is unique to each SocketChannel instance.

So I would like to keep a TreeMap where the key is the SocketChannel instance and then the value is the associated object to help with secure communications.

The problem is that the SocketChannel object is not Comparable (or whatever interface it needs to be to be a key) So I was using the SocketChannels hashCode() method to get a hash for that socket channel.

I've heard that the SocketChannel's hash is not necessarily unique, and in a system with many many connections, I fear that a hash collision can happen, and that the wrong client could be exchanging data with the server. My small fix was managing all these containers that contained a SocketChannel and a pointer to the next container, and to always check to see where the SocketChannel actually is the same object, but this leads to messy and ugly code.

Is there a better way to manage this situation?

Upvotes: 0

Views: 63

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