StompSubframeAggregator Class — netty Architecture

Source Code

codec-stomp/src/main/java/io/netty/handler/codec/stomp/StompSubframeAggregator.java lines 30–92

public class StompSubframeAggregator
        extends MessageAggregator<StompSubframe, StompHeadersSubframe, StompContentSubframe, StompFrame> {

    /**
     * Creates a new instance.
     *
     * @param maxContentLength
     *        the maximum length of the aggregated content.
     *        If the length of the aggregated content exceeds this value,
     *        a {@link TooLongFrameException} will be raised.
     */
    public StompSubframeAggregator(int maxContentLength) {
        super(maxContentLength, StompSubframe.class);
    }

    @Override
    protected boolean isStartMessage(StompSubframe msg) throws Exception {
        return msg instanceof StompHeadersSubframe;
    }

    @Override
    protected boolean isContentMessage(StompSubframe msg) throws Exception {
        return msg instanceof StompContentSubframe;
    }

    @Override
    protected boolean isLastContentMessage(StompContentSubframe msg) throws Exception {
        return msg instanceof LastStompContentSubframe;
    }

    @Override
    protected boolean isAggregated(StompSubframe msg) throws Exception {
        return msg instanceof StompFrame;
    }

    @Override
    protected boolean isContentLengthInvalid(StompHeadersSubframe start, int maxContentLength) {
        return (int) Math.min(Integer.MAX_VALUE, start.headers().getLong(StompHeaders.CONTENT_LENGTH, -1)) >
                     maxContentLength;
    }

    @Override
    protected Object newContinueResponse(StompHeadersSubframe start, int maxContentLength, ChannelPipeline pipeline) {
        return null;
    }

    @Override
    protected boolean closeAfterContinueResponse(Object msg) throws Exception {
        throw new UnsupportedOperationException();
    }

    @Override
    protected boolean ignoreContentAfterContinueResponse(Object msg) throws Exception {
        throw new UnsupportedOperationException();
    }

    @Override
    protected StompFrame beginAggregation(StompHeadersSubframe start, ByteBuf content) throws Exception {
        StompFrame ret = new DefaultStompFrame(start.command(), content);
        ret.headers().set(start.headers());
        return ret;
    }
}