private void handleAddConnection(Connection conn) {
        if (conn.isClosed()) {
            if (conn.hasSocket()) {
                parent.closeLater(conn);
            }
            return;
        }
        if (!conn.init(selector)) {
            handleCloseConnection(conn);
        }
    }
A single reactor/scheduler thread inside a potentially
multi-threaded {@link Transport}.
jrt/src/com/yahoo/jrt/TransportThread.java