acceptOutboundMessage() — netty Function Reference

Source Code

codec-http/src/main/java/io/netty/handler/codec/http/HttpResponseEncoder.java lines 29–42

    @Override
    public boolean acceptOutboundMessage(Object msg) throws Exception {
        // JDK type checks vs non-implemented interfaces costs O(N), where
        // N is the number of interfaces already implemented by the concrete type that's being tested.
        // !(msg instanceof HttpRequest) is supposed to always be true (and meaning that msg isn't a HttpRequest),
        // but sadly was part of the original behaviour of this method and cannot be removed.
        // We place here exact checks vs DefaultHttpResponse and DefaultFullHttpResponse because bad users can
        // extends such types and make them to implement HttpRequest (non-sense, but still possible).
        final Class<?> msgClass = msg.getClass();
        if (msgClass == DefaultFullHttpResponse.class || msgClass == DefaultHttpResponse.class) {
            return true;
        }
        return super.acceptOutboundMessage(msg) && !(msg instanceof HttpRequest);
    }