EncodeProcessor Class — netty Architecture

Source Code

codec-http2/src/main/java/io/netty/handler/codec/http2/HpackHuffmanEncoder.java lines 141–175

    private final class EncodeProcessor implements ByteProcessor {
        ByteBuf out;
        private long current;
        private int n;

        @Override
        public boolean process(byte value) {
            int b = value & 0xFF;
            int nbits = lengths[b];

            current <<= nbits;
            current |= codes[b];
            n += nbits;

            while (n >= 8) {
                n -= 8;
                out.writeByte((int) (current >> n));
            }
            return true;
        }

        void end() {
            try {
                if (n > 0) {
                    current <<= 8 - n;
                    current |= 0xFF >>> n; // this should be EOS symbol
                    out.writeByte((int) current);
                }
            } finally {
                out = null;
                current = 0;
                n = 0;
            }
        }
    }