/**
* A convenience method to bind to a given address and report better exceptions if the address is
* not a valid host.
*
* @param socket the socket to bind
* @param address the address to bind to
* @param backlog the number of connections allowed in the queue
* @throws BindException if the address can't be bound
* @throws UnknownHostException if the address isn't a valid host name
* @throws IOException other random errors from bind
*/
public static void bind(ServerSocket socket, InetSocketAddress address, int backlog)
throws IOException {
try {
socket.bind(address, backlog);
} catch (BindException e) {
BindException bindException =
new BindException("Problem binding to " + address + " : " + e.getMessage());
bindException.initCause(e);
throw bindException;
} catch (SocketException e) {
// If they try to bind to a different host's address, give a better
// error message.
if ("Unresolved address".equals(e.getMessage())) {
throw new UnknownHostException("Invalid hostname for server: " + address.getHostName());
} else {
throw e;
}
}
}
