Example usage for io.netty.buffer ByteBuf readByte

Introduction

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

Prototype

public abstract byte readByte();

Source Link

Document

Gets a byte at the current readerIndex and increases the readerIndex by 1 in this buffer.

Usage

From source file:herddb.utils.ByteBufUtils.java

License:Apache License

private static final long readVLong(ByteBuf buffer, boolean allowNegative) {
    byte b = buffer.readByte();
    if (b >= 0) {
        return b;
    }/*from   w  w  w . j a v  a 2s  .  com*/
    long i = b & 0x7FL;
    b = buffer.readByte();
    i |= (b & 0x7FL) << 7;
    if (b >= 0) {
        return i;
    }
    b = buffer.readByte();
    i |= (b & 0x7FL) << 14;
    if (b >= 0) {
        return i;
    }
    b = buffer.readByte();
    i |= (b & 0x7FL) << 21;
    if (b >= 0) {
        return i;
    }
    b = buffer.readByte();
    i |= (b & 0x7FL) << 28;
    if (b >= 0) {
        return i;
    }
    b = buffer.readByte();
    i |= (b & 0x7FL) << 35;
    if (b >= 0) {
        return i;
    }
    b = buffer.readByte();
    i |= (b & 0x7FL) << 42;
    if (b >= 0) {
        return i;
    }
    b = buffer.readByte();
    i |= (b & 0x7FL) << 49;
    if (b >= 0) {
        return i;
    }
    b = buffer.readByte();
    i |= (b & 0x7FL) << 56;
    if (b >= 0) {
        return i;
    }
    if (allowNegative) {
        b = buffer.readByte();
        i |= (b & 0x7FL) << 63;
        if (b == 0 || b == 1) {
            return i;
        }
        throw new IllegalArgumentException("Invalid vLong detected (more than 64 bits)");
    } else {
        throw new IllegalArgumentException("Invalid vLong detected (negative values disallowed)");
    }
}

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From source file:hivemall.mix.MixMessageDecoder.java

License:Open Source License

@Override
protected MixMessage decode(ChannelHandlerContext ctx, ByteBuf in) throws Exception {
    ByteBuf frame = (ByteBuf) super.decode(ctx, in);
    if (frame == null) {
        return null;
    }/*from  www. j  a  v  a 2 s .  c o m*/

    byte b = frame.readByte();
    MixEventName event = MixEventName.resolve(b);
    Object feature = decodeObject(frame);
    float weight = frame.readFloat();
    float covariance = frame.readFloat();
    short clock = frame.readShort();
    int deltaUpdates = frame.readInt();
    boolean cancelRequest = frame.readBoolean();
    String groupID = readString(frame);

    MixMessage msg = new MixMessage(event, feature, weight, covariance, clock, deltaUpdates, cancelRequest);
    msg.setGroupID(groupID);
    return msg;
}

---

From source file:hivemall.mix.MixMessageDecoder.java

License:Open Source License

private static Object decodeObject(final ByteBuf in) throws IOException {
    final byte type = in.readByte();
    switch (type) {
    case INTEGER_TYPE: {
        int i = in.readInt();
        return Integer.valueOf(i);
    }//from   w w w .  j a v  a  2 s.com
    case TEXT_TYPE: {
        int length = in.readInt();
        byte[] b = new byte[length];
        in.readBytes(b, 0, length);
        Text t = new Text(b);
        return t;
    }
    case STRING_TYPE: {
        return readString(in);
    }
    case INT_WRITABLE_TYPE: {
        int i = in.readInt();
        return new IntWritable(i);
    }
    case LONG_WRITABLE_TYPE: {
        long l = in.readLong();
        return new LongWritable(l);
    }
    default:
        break;
    }
    throw new IllegalStateException("Illegal type: " + type);
}

---

From source file:impl.underdark.transport.bluetooth.discovery.ble.ManufacturerData.java

License:Open Source License

public static ManufacturerData parse(byte[] data) {
    if (data == null || data.length < (1 + 6 + 4))
        return null;

    ByteBuf buf = Unpooled.wrappedBuffer(data);
    byte version = buf.readByte();
    if (version != 1)
        return null;

    int appId = buf.readInt();
    byte[] address = new byte[deviceAddressLen];
    buf.readBytes(address);//from   w ww .  j  av a 2 s .  c  o  m
    int channelsMask = buf.readInt();

    List<Integer> channels = new ArrayList<>();

    for (int channel = 0; channelsMask != 0; ++channel) {
        if (channelsMask % 2 != 0)
            channels.add(channel);

        channelsMask >>= 1;
    }

    return new ManufacturerData(appId, address, channels);
}

---

From source file:info.zhoumin.dat.AbstractDoubleArrayTrie.java

License:Apache License

private boolean branchInTail(int sepNode, int c, ByteBuf suffix, V data) {
    /* adjust separate point in old path */
    int oldTail = getTailIndex(sepNode);
    ByteBuf oldSuffix = tail.getSuffix(oldTail);
    if (oldSuffix == null)
        return false;

    byte oldByte, newByte;
    int s = sepNode;
    suffix.resetReaderIndex();/*  w ww .j  a v a2s  .  com*/
    oldSuffix.resetReaderIndex();
    do {
        newByte = suffix.readByte();
        oldByte = oldSuffix.readByte();
        if (newByte != oldByte)
            break;
        int t = insertBranch(s, newByte + 1);
        if (TRIE_INDEX_ERROR == t) {
            // /* failed, undo previous insertions and return error */
            // da_prune_upto (trie->da, sep_node, s);
            // trie_da_set_tail_index (trie->da, sep_node, old_tail);
            // throw new RuntimeException("error happened!");
            return false;
        }
        s = t;
    } while (suffix.isReadable() && oldSuffix.isReadable());

    int oldDA = insertBranch(s, oldByte + 1);
    if (TRIE_INDEX_ERROR == oldDA) {
        // /* failed, undo previous insertions and return error */
        // da_prune_upto (trie->da, sep_node, s);
        // trie_da_set_tail_index (trie->da, sep_node, old_tail);
        // throw new RuntimeException("error happened!");
        return false;
    }

    tail.setSuffix(oldTail, oldSuffix.discardReadBytes().copy());
    setTailIndex(oldDA, oldTail);

    /* insert the new branch at the new separate point */
    return branchInBranch(s, newByte + 1, suffix.discardReadBytes().copy(), data);
}

---

From source file:info.zhoumin.dat.AbstractDoubleArrayTrie.java

License:Apache License

@Override
public V put(K key, V value) {
    if (key == null) {
        throw new NullPointerException("Key cannot be null");
    }//from   w  w w . j a v a  2  s .c om

    int s = DOUBLE_ARRAY_ROOT;
    keyAnalyzer.setValue(key);
    while (keyAnalyzer.hasNext()) {
        if (daIsSeperate(s))
            break;
        int c = (int) keyAnalyzer.next() + 1;
        int next = getNext(s, c);
        if (next < 0) {
            branchInBranch(s, c, keyAnalyzer.rest(), value);
            return value;
        }
        s = next;
    }

    /* walk through tail */
    ByteBuf suffix = tail.getSuffix(getTailIndex(s));
    suffix.resetReaderIndex();
    ByteBuf tailBytes = keyAnalyzer.rest();

    int c = (keyAnalyzer.hasNext() ? keyAnalyzer.next() : 0) + 1;
    while (suffix.isReadable() && tailBytes.isReadable()) {
        byte b = suffix.readByte();
        if (b != tailBytes.readByte()) {
            branchInTail(s, c, tailBytes, value);
            return value;
        }
    }

    // , ?
    this.isDirty = true;
    return null;
}

---

From source file:io.airlift.drift.transport.netty.codec.HeaderTransport.java

License:Apache License

/**
 * Decodes the ByteBuf into a HeaderFrame transferring the reference ownership.
 * @param buffer buffer to be decoded; reference count ownership is transferred to this method
 * @return the decoded frame; caller is responsible for releasing this object
 *//*from w w  w.ja v a  2s.  c  o  m*/
public static ThriftFrame decodeFrame(ByteBuf buffer) {
    ByteBuf messageHeader = null;
    try {
        // frame header
        short magic = buffer.readShort();
        verify(magic == HEADER_MAGIC, "Invalid header magic");
        short flags = buffer.readShort();
        boolean outOfOrderResponse;
        switch (flags) {
        case FLAGS_NONE:
            outOfOrderResponse = false;
            break;
        case FLAG_SUPPORT_OUT_OF_ORDER:
            outOfOrderResponse = true;
            break;
        default:
            throw new IllegalArgumentException("Unsupported header flags: " + flags);
        }
        int frameSequenceId = buffer.readInt();
        int headerSize = buffer.readShort() << 2;
        messageHeader = buffer.readBytes(headerSize);

        // encoding info
        byte protocolId = messageHeader.readByte();
        Protocol protocol = Protocol.getProtocolByHeaderTransportId(protocolId);
        byte numberOfTransforms = messageHeader.readByte();
        if (numberOfTransforms > 0) {
            // currently there are only two transforms, a cryptographic extension which is deprecated, and gzip which is too expensive
            throw new IllegalArgumentException("Unsupported transform");
        }

        // headers
        // todo what about duplicate headers?
        ImmutableMap.Builder<String, String> allHeaders = ImmutableMap.builder();
        allHeaders.putAll(decodeHeaders(NORMAL_HEADERS, messageHeader));
        allHeaders.putAll(decodeHeaders(PERSISTENT_HEADERS, messageHeader));

        // message
        ByteBuf message = buffer.readBytes(buffer.readableBytes());

        // header frame wraps message byte buffer, so message should not be release yet
        return new ThriftFrame(frameSequenceId, message, allHeaders.build(), HEADER, protocol,
                outOfOrderResponse);
    } finally {
        // message header in an independent buffer and must be released
        if (messageHeader != null) {
            messageHeader.release();
        }

        // input buffer has been consumed and transformed into a HeaderFrame, so release it
        buffer.release();
    }
}

---

From source file:io.airlift.drift.transport.netty.codec.HeaderTransport.java

License:Apache License

private static Map<String, String> decodeHeaders(int expectedHeadersType, ByteBuf messageHeader) {
    if (messageHeader.readableBytes() == 0) {
        return ImmutableMap.of();
    }/*from  www  .  j  a  v a2 s  . c  o m*/

    byte headersType = messageHeader.readByte();
    if (headersType != expectedHeadersType) {
        return ImmutableMap.of();
    }

    ImmutableMap.Builder<String, String> headers = ImmutableMap.builder();
    int headerCount = readVariableLengthInt(messageHeader);
    for (int i = 0; i < headerCount; i++) {
        String key = readString(messageHeader);
        String value = readString(messageHeader);
        headers.put(key, value);
    }
    return headers.build();
}

---

From source file:io.airlift.drift.transport.netty.codec.HeaderTransport.java

License:Apache License

private static int readVariableLengthInt(ByteBuf messageHeader) {
    int result = 0;
    int shift = 0;

    while (true) {
        byte b = messageHeader.readByte();
        result |= (b & 0x7f) << shift;
        if ((b & 0x80) != 0x80) {
            break;
        }/*from   w w w .j  a  v  a 2  s . co  m*/
        shift += 7;
    }

    return result;
}

---

From source file:io.airlift.drift.transport.netty.HeaderMessageEncoding.java

License:Apache License

private static Map<String, String> decodeHeaders(int expectedHeadersType, ByteBuf messageHeader) {
    if (messageHeader.readableBytes() == 0) {
        return ImmutableMap.of();
    }/*from   ww w.  jav a 2s  . c  o  m*/

    byte headersType = messageHeader.readByte();
    if (headersType != expectedHeadersType) {
        return ImmutableMap.of();
    }

    ImmutableMap.Builder<String, String> headers = ImmutableMap.builder();
    int headerCount = readVarint(messageHeader);
    for (int i = 0; i < headerCount; i++) {
        String key = readString(messageHeader);
        String value = readString(messageHeader);
        headers.put(key, value);
    }
    return headers.build();
}

---

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