Examples of io.netty.buffer.ByteBuf.slice()

io.netty.buffer.ByteBuf.slice()
Returns a slice of this buffer's readable bytes. Modifying the content of the returned buffer or this buffer affects each other's content while they maintain separate indexes and marks. This method is identical to {@code buf.slice(buf.readerIndex(), buf.readableBytes())}. This method does not modify {@code readerIndex} or {@code writerIndex} ofthis buffer.

            ByteBuf frame =  (ByteBuf) super.decode(ctx, buffer);
            if (frame == null) {
                return null;
            }
            int index = frame.indexOf(frame.readerIndex(), frame.writerIndex(), (byte) ' ');
            return new Cmd(frame.slice(frame.readerIndex(), index), frame.slice(index +1, frame.writerIndex()));
        }
    }


    public static final class CmdHandler extends SimpleChannelInboundHandler<Cmd> {
        @Override

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        // Set the stream window size to zero.
        exhaustStreamWindow(STREAM_A);


        final ByteBuf data = dummyData(10, 0);
        try {
            send(STREAM_A, data.slice(), 0);
            verifyNoWrite(STREAM_A);


            // Verify that the entire frame was sent.
            controller.updateOutboundWindowSize(STREAM_A, 10);
            assertEquals(DEFAULT_WINDOW_SIZE - data.readableBytes(), window(CONNECTION_STREAM_ID));

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            runInChannel(clientChannel, new Http2Runnable() {
                @Override
                public void run() {
                    frameWriter.writeHeaders(ctxClient(), 3, http2Headers, 0, false, newPromiseClient());
                    frameWriter
                    .writeData(ctxClient(), 3, content.slice(0, midPoint).retain(), 0, false, newPromiseClient());
                    frameWriter.writeData(ctxClient(), 3, content.slice(midPoint, text.length() - midPoint).retain(), 0,
                            true, newPromiseClient());
                    ctxClient().flush();
                }
            });

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                @Override
                public void run() {
                    frameWriter.writeHeaders(ctxClient(), 3, http2Headers, 0, false, newPromiseClient());
                    frameWriter
                    .writeData(ctxClient(), 3, content.slice(0, midPoint).retain(), 0, false, newPromiseClient());
                    frameWriter.writeData(ctxClient(), 3, content.slice(midPoint, text.length() - midPoint).retain(), 0,
                            true, newPromiseClient());
                    ctxClient().flush();
                }
            });
            awaitRequests();

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        encoderChannel.writeOutbound(Unpooled.wrappedBuffer(payload));
        ByteBuf compressedPayload = encoderChannel.readOutbound();


        BinaryWebSocketFrame compressedFrame = new BinaryWebSocketFrame(true,
                WebSocketExtension.RSV1 | WebSocketExtension.RSV3,
                compressedPayload.slice(0, compressedPayload.readableBytes() - 4));


        // execute
        decoderChannel.writeInbound(compressedFrame);
        BinaryWebSocketFrame uncompressedFrame = decoderChannel.readInbound();

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    @Test
    public void frameShouldBeSentImmediately() throws Http2Exception {
        final ByteBuf data = dummyData(5, 5);
        try {
            send(STREAM_A, data.slice(0, 5), 5);
            verifyWrite(STREAM_A, data.slice(0, 5), 5);
            assertEquals(1, data.refCnt());
        } finally {
            manualSafeRelease(data);
        }

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    @Test
    public void frameShouldBeSentImmediately() throws Http2Exception {
        final ByteBuf data = dummyData(5, 5);
        try {
            send(STREAM_A, data.slice(0, 5), 5);
            verifyWrite(STREAM_A, data.slice(0, 5), 5);
            assertEquals(1, data.refCnt());
        } finally {
            manualSafeRelease(data);
        }
    }

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        final ByteBuf data = dummyData(5, 0);
        try {
            send(STREAM_A, data.copy(), 5);


            verifyWrite(STREAM_A, data.slice(0, 3), 0);
            verifyWrite(STREAM_A, data.slice(3, 2), 1);
            verifyWrite(STREAM_A, Unpooled.EMPTY_BUFFER, 3);
            verifyWrite(STREAM_A, Unpooled.EMPTY_BUFFER, 1);
        } finally {
            manualSafeRelease(data);

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        final ByteBuf data = dummyData(5, 0);
        try {
            send(STREAM_A, data.copy(), 5);


            verifyWrite(STREAM_A, data.slice(0, 3), 0);
            verifyWrite(STREAM_A, data.slice(3, 2), 1);
            verifyWrite(STREAM_A, Unpooled.EMPTY_BUFFER, 3);
            verifyWrite(STREAM_A, Unpooled.EMPTY_BUFFER, 1);
        } finally {
            manualSafeRelease(data);
        }

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    public void stalledStreamShouldQueueFrame() throws Http2Exception {
        controller.initialOutboundWindowSize(0);


        final ByteBuf data = dummyData(10, 5);
        try {
            send(STREAM_A, data.slice(0, 10), 5);
            verifyNoWrite(STREAM_A);
            assertEquals(1, data.refCnt());
        } finally {
            manualSafeRelease(data);
        }

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