Http3RequestStreamInitializer Class — netty Architecture

Source Code

codec-http3/src/main/java/io/netty/handler/codec/http3/Http3RequestStreamInitializer.java lines 27–57

public abstract class Http3RequestStreamInitializer extends ChannelInitializer<QuicStreamChannel> {

    @Override
    protected final void initChannel(QuicStreamChannel ch) {
        ChannelPipeline pipeline = ch.pipeline();
        Http3ConnectionHandler connectionHandler = ch.parent().pipeline().get(Http3ConnectionHandler.class);
        if (connectionHandler == null) {
            throw new IllegalStateException("Couldn't obtain the " +
                    StringUtil.simpleClassName(Http3ConnectionHandler.class) + " of the parent Channel");
        }

        Http3RequestStreamEncodeStateValidator encodeStateValidator = new Http3RequestStreamEncodeStateValidator();
        Http3RequestStreamDecodeStateValidator decodeStateValidator = new Http3RequestStreamDecodeStateValidator();

        // Add the encoder and decoder in the pipeline so we can handle Http3Frames
        pipeline.addLast(connectionHandler.newCodec(encodeStateValidator, decodeStateValidator));
        // Add the handler that will validate what we write and receive on this stream.
        pipeline.addLast(encodeStateValidator);
        pipeline.addLast(decodeStateValidator);
        pipeline.addLast(connectionHandler.newRequestStreamValidationHandler(ch, encodeStateValidator,
                decodeStateValidator));
        initRequestStream(ch);
    }

    /**
     * Init the {@link QuicStreamChannel} to handle {@link Http3RequestStreamFrame}s. At the point of calling this
     * method it is already valid to write {@link Http3RequestStreamFrame}s as the codec is already in the pipeline.
     * @param ch    the {QuicStreamChannel} for the request stream.
     */
    protected abstract void initRequestStream(QuicStreamChannel ch);
}