ProtocolSelector Type — netty Architecture

Source Code

handler/src/main/java/io/netty/handler/ssl/JdkApplicationProtocolNegotiator.java lines 78–95

    interface ProtocolSelector {
        /**
         * Callback invoked to let the application know that the peer does not support this
         * {@link ApplicationProtocolNegotiator}.
         */
        void unsupported();

        /**
         * Callback invoked to select the application level protocol from the {@code protocols} provided.
         *
         * @param protocols the protocols sent by the protocol advertiser
         * @return the protocol selected by this {@link ProtocolSelector}. A {@code null} value will indicate the no
         * protocols were selected but the handshake should not fail. The decision to fail the handshake is left to the
         * other end negotiating the SSL handshake.
         * @throws Exception If the {@code protocols} provide warrant failing the SSL handshake with a fatal alert.
         */
        String select(List<String> protocols) throws Exception;
    }