ImmediateSendDetector Type — netty Architecture

Source Code

codec-http2/src/main/java/io/netty/handler/codec/http2/InboundHttp2ToHttpAdapter.java lines 335–357

    private interface ImmediateSendDetector {
        /**
         * Determine if the response should be sent immediately, or wait for the end of the stream
         *
         * @param msg The response to test
         * @return {@code true} if the message should be sent immediately
         *         {@code false) if we should wait for the end of the stream
         */
        boolean mustSendImmediately(FullHttpMessage msg);

        /**
         * Determine if a copy must be made after an immediate send happens.
         * <p>
         * An example of this use case is if a request is received
         * with a 'Expect: 100-continue' header. The message will be sent immediately,
         * and the data will be queued and sent at the end of the stream.
         *
         * @param allocator The {@link ByteBufAllocator} that can be used to allocate
         * @param msg The message which has just been sent due to {@link #mustSendImmediately(FullHttpMessage)}
         * @return A modified copy of the {@code msg} or {@code null} if a copy is not needed.
         */
        FullHttpMessage copyIfNeeded(ByteBufAllocator allocator, FullHttpMessage msg);
    }