private void configureSsl(SocketChannel ch) {
        SslContext sslCtx = SslContextBuilder.buildForClient();
        ChannelPipeline pipeline = ch.pipeline();
        pipeline.addLast(sslCtx.newHandler(ch.alloc()));
        // We must wait for the handshake to finish and the protocol to be negotiated
        // before configuring
        // the HTTP/2 components of the pipeline.
        pipeline.addLast(new ApplicationProtocolNegotiationHandler("") {
            @Override
            protected void configurePipeline(ChannelHandlerContext ctx, String protocol) {
                if (ApplicationProtocolNames.HTTP_2.equals(protocol)) {
                    ChannelPipeline p = ctx.pipeline();
                    p.addLast(connectionHandler);
                    configureEndOfPipeline(p);
                    return;
                }
                ctx.close();
                throw new IllegalStateException("unknown protocol: " + protocol);
            }
        });
    }
Configure the pipeline for TLS NPN negotiation to HTTP/2.
remoting/remoting-http/src/main/java/com/alipay/sofa/rpc/transport/http/Http2ClientInitializer.java