PropertyKeyRegistry Class — netty Architecture

Source Code

codec-http2/src/main/java/io/netty/handler/codec/http2/DefaultHttp2Connection.java lines 1095–1115

    private final class PropertyKeyRegistry {
        /**
         * Initial size of 4 because the default configuration currently has 3 listeners
         * (local/remote flow controller and {@link StreamByteDistributor}) and we leave room for 1 extra.
         * We could be more aggressive but the ArrayList resize will double the size if we are too small.
         */
        final List<DefaultPropertyKey> keys = new ArrayList<DefaultPropertyKey>(4);

        /**
         * Registers a new property key.
         */
        DefaultPropertyKey newKey() {
            DefaultPropertyKey key = new DefaultPropertyKey(keys.size());
            keys.add(key);
            return key;
        }

        int size() {
            return keys.size();
        }
    }