Example usage for io.netty.buffer ByteBuf isReadable

Introduction

In this page you can find the example usage for io.netty.buffer ByteBuf isReadable.

Prototype

public abstract boolean isReadable();

Source Link

Document

Returns true if and only if (this.writerIndex - this.readerIndex) is greater than 0 .

Usage

From source file:com.gemstone.gemfire.internal.redis.ByteToCommandDecoder.java

License:Apache License

@Override
protected void decode(ChannelHandlerContext ctx, ByteBuf in, List<Object> out) throws Exception {
    Command c = null;// w w w .  j av a  2 s .  co  m
    do {
        in.markReaderIndex();
        c = parse(in);
        if (c == null) {
            in.resetReaderIndex();
            return;
        }
        out.add(c);
    } while (in.isReadable()); // Try to take advantage of pipelining if it is being used
}

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From source file:com.gemstone.gemfire.internal.redis.ByteToCommandDecoder.java

License:Apache License

private Command parse(ByteBuf buffer) throws RedisCommandParserException {
    if (buffer == null)
        throw new NullPointerException();
    if (!buffer.isReadable())
        return null;

    byte firstB = buffer.readByte();
    if (firstB != arrayID)
        throw new RedisCommandParserException("Expected: " + (char) arrayID + " Actual: " + (char) firstB);
    ArrayList<byte[]> commandElems = new ArrayList<byte[]>();

    if (!parseArray(commandElems, buffer))
        return null;

    return new Command(commandElems);
}

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From source file:com.gemstone.gemfire.internal.redis.ByteToCommandDecoder.java

License:Apache License

private boolean parseArray(ArrayList<byte[]> commandElems, ByteBuf buffer) throws RedisCommandParserException {
    byte currentChar;
    int arrayLength = parseCurrentNumber(buffer);
    if (arrayLength == Integer.MIN_VALUE || !parseRN(buffer))
        return false;
    if (arrayLength < 0 || arrayLength > 1000000000)
        throw new RedisCommandParserException("invalid multibulk length");

    for (int i = 0; i < arrayLength; i++) {
        if (!buffer.isReadable())
            return false;
        currentChar = buffer.readByte();
        if (currentChar == bulkStringID) {
            byte[] newBulkString = parseBulkString(buffer);
            if (newBulkString == null)
                return false;
            commandElems.add(newBulkString);
        } else// ww w .  ja  va  2 s  .com
            throw new RedisCommandParserException("expected: \'$\', got \'" + (char) currentChar + "\'");
    }
    return true;
}

---

From source file:com.gemstone.gemfire.internal.redis.ByteToCommandDecoder.java

License:Apache License

/**
 * Helper method to parse the number at the beginning of the buffer
 * /*from   www  .j ava  2s .  c  o m*/
 * @param buffer Buffer to read
 * @return The number found at the beginning of the buffer
 */
private int parseCurrentNumber(ByteBuf buffer) {
    int number = 0;
    int readerIndex = buffer.readerIndex();
    byte b = 0;
    while (true) {
        if (!buffer.isReadable())
            return Integer.MIN_VALUE;
        b = buffer.readByte();
        if (Character.isDigit(b)) {
            number = number * 10 + (int) (b - '0');
            readerIndex++;
        } else {
            buffer.readerIndex(readerIndex);
            break;
        }
    }
    return number;
}

---

From source file:com.github.sparkfy.network.util.TransportFrameDecoder.java

License:Apache License

@Override
public void channelRead(ChannelHandlerContext ctx, Object data) throws Exception {
    ByteBuf in = (ByteBuf) data;/*from  w ww  . j  a v  a  2  s.c o  m*/
    buffers.add(in);
    totalSize += in.readableBytes();

    while (!buffers.isEmpty()) {
        // First, feed the interceptor, and if it's still, active, try again.
        if (interceptor != null) {
            ByteBuf first = buffers.getFirst();
            int available = first.readableBytes();
            if (feedInterceptor(first)) {
                assert !first.isReadable() : "Interceptor still active but buffer has data.";
            }

            int read = available - first.readableBytes();
            if (read == available) {
                buffers.removeFirst().release();
            }
            totalSize -= read;
        } else {
            // Interceptor is not active, so try to decode one frame.
            ByteBuf frame = decodeNext();
            if (frame == null) {
                break;
            }
            ctx.fireChannelRead(frame);
        }
    }
}

---

From source file:com.github.sparkfy.network.util.TransportFrameDecoder.java

License:Apache License

private long decodeFrameSize() {
    if (nextFrameSize != UNKNOWN_FRAME_SIZE || totalSize < LENGTH_SIZE) {
        return nextFrameSize;
    }//from  ww  w  . j  av a2  s .c om

    // We know there's enough data. If the first buffer contains all the data, great. Otherwise,
    // hold the bytes for the frame length in a composite buffer until we have enough data to read
    // the frame size. Normally, it should be rare to need more than one buffer to read the frame
    // size.
    ByteBuf first = buffers.getFirst();
    if (first.readableBytes() >= LENGTH_SIZE) {
        nextFrameSize = first.readLong() - LENGTH_SIZE;
        totalSize -= LENGTH_SIZE;
        if (!first.isReadable()) {
            buffers.removeFirst().release();
        }
        return nextFrameSize;
    }

    while (frameLenBuf.readableBytes() < LENGTH_SIZE) {
        ByteBuf next = buffers.getFirst();
        int toRead = Math.min(next.readableBytes(), LENGTH_SIZE - frameLenBuf.readableBytes());
        frameLenBuf.writeBytes(next, toRead);
        if (!next.isReadable()) {
            buffers.removeFirst().release();
        }
    }

    nextFrameSize = frameLenBuf.readLong() - LENGTH_SIZE;
    totalSize -= LENGTH_SIZE;
    frameLenBuf.clear();
    return nextFrameSize;
}

---

From source file:com.github.vitrifiedcode.javautilities.netty.DiscardServerHandler.java

License:Open Source License

@Override
public void channelRead(ChannelHandlerContext ctx, Object msg) {
    ByteBuf in = (ByteBuf) msg;
    try {/*from   www. ja va 2 s  . co m*/
        while (in.isReadable()) {
            System.out.print((char) in.readByte());
            System.out.flush();
        }
    } finally {
        ReferenceCountUtil.release(msg);
    }
}

---

From source file:com.groupon.vertx.memcache.stream.MemcacheInputStream.java

License:Apache License

/**
 * This method handles processing the incoming Buffer from the NetSocket.  The Buffer
 * is not guaranteed to contain a whole message so this method tracks the current state
 * of the incoming data and notifies the pending commands when enough data has been sent
 * for a response.//from   ww w  . ja  va 2 s  .c om
 *
 * @param processBuffer - The Buffer containing the current set of bytes.
 */
public void processBuffer(Buffer processBuffer) {
    if (processBuffer == null || processBuffer.length() == 0) {
        return;
    }

    byte first;
    byte second;

    ByteBuf byteBuf = processBuffer.getByteBuf();

    while (byteBuf.isReadable()) {
        first = byteBuf.readByte();
        if (first == '\r') {
            if (byteBuf.isReadable()) {
                second = byteBuf.readByte();
                if (second == '\n') {
                    addCompletedLine();
                }
                previous = second;
            } else {
                previous = first;
            }
        } else if (first == '\n' && previous == '\r') {
            addCompletedLine();
            previous = first;
        } else {
            buffer.write(first);
            previous = first;
        }
    }
}

---

From source file:com.groupon.vertx.redis.RedisInputStream.java

License:Apache License

/**
 * This method handles processing the incoming Buffer from the NetSocket.  The Buffer
 * is not guaranteed to contain a whole message so this method tracks the current state
 * of the incoming data and notifies the pending commands when enough data has been sent
 * for a response.//w ww  .  j  av  a 2s . co  m
 *
 * @param processBuffer - The Buffer containing the current set of bytes.
 */
public void processBuffer(Buffer processBuffer) {
    if (processBuffer == null || processBuffer.length() == 0) {
        return;
    }

    byte first;
    byte second;

    ByteBuf byteBuf = processBuffer.getByteBuf();

    while (byteBuf.isReadable()) {
        first = byteBuf.readByte();
        if (first == '\r' && byteBuf.isReadable()) {
            second = byteBuf.readByte();
            if (second == '\n') {
                byte[] line = new byte[bufferPosition];
                System.arraycopy(buffer, 0, line, 0, line.length);
                addCompletedLine(line);
            } else {
                buffer[bufferPosition++] = first;
                buffer[bufferPosition++] = second;
            }
        } else if (first == '\n' && buffer[bufferPosition - 1] == '\r') {
            byte[] line = new byte[bufferPosition - 1];
            System.arraycopy(buffer, 0, line, 0, line.length);
            addCompletedLine(line);
        } else {
            buffer[bufferPosition++] = first;
        }
    }
}

---

From source file:com.intuit.karate.netty.FeatureServerHandler.java

License:Open Source License

@Override
protected void channelRead0(ChannelHandlerContext ctx, FullHttpRequest msg) {
    long startTime = System.currentTimeMillis();
    backend.getContext().logger.debug("handling method: {}, uri: {}", msg.method(), msg.uri());
    FullHttpResponse nettyResponse;/*from ww  w. j  a v a2 s .c  o  m*/
    if (msg.uri().startsWith(STOP_URI)) {
        backend.getContext().logger.info("stop uri invoked, shutting down");
        ByteBuf responseBuf = Unpooled.copiedBuffer("stopped", CharsetUtil.UTF_8);
        nettyResponse = new DefaultFullHttpResponse(HttpVersion.HTTP_1_1, HttpResponseStatus.OK, responseBuf);
        stopFunction.run();
    } else {
        StringUtils.Pair url = HttpUtils.parseUriIntoUrlBaseAndPath(msg.uri());
        HttpRequest request = new HttpRequest();
        if (url.left == null) {
            String requestScheme = ssl ? "https" : "http";
            String host = msg.headers().get(HttpUtils.HEADER_HOST);
            request.setUrlBase(requestScheme + "://" + host);
        } else {
            request.setUrlBase(url.left);
        }
        request.setUri(url.right);
        request.setMethod(msg.method().name());
        msg.headers().forEach(h -> request.addHeader(h.getKey(), h.getValue()));
        QueryStringDecoder decoder = new QueryStringDecoder(url.right);
        decoder.parameters().forEach((k, v) -> request.putParam(k, v));
        HttpContent httpContent = (HttpContent) msg;
        ByteBuf content = httpContent.content();
        if (content.isReadable()) {
            byte[] bytes = new byte[content.readableBytes()];
            content.readBytes(bytes);
            request.setBody(bytes);
        }
        HttpResponse response = backend.buildResponse(request, startTime);
        HttpResponseStatus httpResponseStatus = HttpResponseStatus.valueOf(response.getStatus());
        byte[] responseBody = response.getBody();
        if (responseBody != null) {
            ByteBuf responseBuf = Unpooled.copiedBuffer(responseBody);
            nettyResponse = new DefaultFullHttpResponse(HttpVersion.HTTP_1_1, httpResponseStatus, responseBuf);
        } else {
            nettyResponse = new DefaultFullHttpResponse(HttpVersion.HTTP_1_1, httpResponseStatus);
        }
        MultiValuedMap karateHeaders = response.getHeaders();
        if (karateHeaders != null) {
            HttpHeaders nettyHeaders = nettyResponse.headers();
            karateHeaders.forEach((k, v) -> nettyHeaders.add(k, v));
        }
    }
    ctx.write(nettyResponse);
    ctx.writeAndFlush(Unpooled.EMPTY_BUFFER).addListener(ChannelFutureListener.CLOSE);
}

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