Question

Reference to the Question I asked before, the socket closing need some times to operate:
Why it warns me the socket is closed when I quit the programme?

        providerSocket.close();

Can I ask it to run several code when I close the socket? Thanks.

Answer 1

I ran across this problem with SocketChannels, and as far as I can tell (and as far as Stack Overflow can tell) there’s no supported way to do this with the JDK. However, I didn’t let that stop me. With proper encapsulation you can do something like this:

public class SocketWrapper implements Closeable {
    private final Socket socket;

    public SocketWrapper(Socket socket) {
        this.socket = socket;
    }

    /**
    * Provide all the methods you need in your application
    * for accessing the internal socket
    */

    public void close() throws IOException {
        socket.close();
        fireClosedEvent();
    }

    /**
    * Event firing methods, etc.
    */
}

This isn’t as flexible as I would like and that’s why I’m still leaving my question unanswered, but it might be a good solution for you. Of course, coming up with a better name than SocketWrapper might be a good idea.