Example usage for io.netty.buffer ByteBuf slice

Introduction

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

Prototype

public abstract ByteBuf slice();

Source Link

Document

Returns a slice of this buffer's readable bytes.

Usage

From source file:at.yawk.dbus.protocol.codec.MessageHeaderCodec.java

@Override
protected void decode(ChannelHandlerContext ctx, ByteBuf rawBuf, List<Object> out) throws Exception {
    if (toRead != 0) {
        if (rawBuf.readableBytes() < toRead) {
            return;
        }/*  ww  w  .j  a  va  2 s .c om*/
        ByteBuf slice = rawBuf.slice().order(byteOrder);
        slice.writerIndex(slice.readerIndex() + toRead);
        slice.retain();
        AlignableByteBuf decoding = AlignableByteBuf.decoding(slice);
        log.trace("INBOUND {}", decoding);
        out.add(decoding);

        rawBuf.readerIndex(rawBuf.readerIndex() + toRead);
        toRead = 0;
    }

    if (rawBuf.readableBytes() < MIN_HEADER_LENGTH) {
        return;
    }

    rawBuf.markReaderIndex();
    byte endianness = rawBuf.readByte();
    ByteOrder order;
    switch (endianness) {
    case 'l':
        order = ByteOrder.LITTLE_ENDIAN;
        break;
    case 'B':
        order = ByteOrder.BIG_ENDIAN;
        break;
    default:
        throw new DecoderException("Unknown byte order byte " + endianness);
    }

    AlignableByteBuf buf = AlignableByteBuf.decoding(rawBuf.resetReaderIndex().order(order));

    buf.getBuffer().markReaderIndex();
    buf.readByte(); // skip endianness byte we read above

    @Nullable
    MessageType type = MessageType.byId(buf.readByte());
    byte flags = buf.readByte();
    byte majorProtocolVersion = buf.readByte();
    if (majorProtocolVersion != PROTOCOL_VERSION) {
        throw new DecoderException("Unsupported major protocol version " + majorProtocolVersion);
    }
    long bodyLength = buf.readUnsignedInt();
    int serial = buf.readInt();

    MessageHeader header = new MessageHeader();
    header.setByteOrder(order);
    header.setMessageType(type);
    header.setNoReplyExpected((flags & NO_REPLY_EXPECTED) != 0);
    header.setNoAutoStart((flags & NO_AUTO_START) != 0);
    header.setAllowInteractiveAuthorization((flags & ALLOW_INTERACTIVE_AUTHORIZATION) != 0);
    header.setMajorProtocolVersion(majorProtocolVersion);
    header.setMessageBodyLength(bodyLength);
    header.setSerial(serial);
    header.setHeaderFields(new EnumMap<>(HeaderField.class));

    ArrayObject headers = (ArrayObject) tryDecode(HEADER_FIELD_LIST_TYPE, buf);
    if (headers == null) {
        // not enough data
        buf.getBuffer().resetReaderIndex();
        return;
    }
    for (DbusObject struct : headers.getValues()) {
        HeaderField field = HeaderField.byId(struct.get(0).byteValue());
        if (field != null) {
            DbusObject value = struct.get(1).getValue();
            if (!value.getType().equals(field.getType())) {
                throw new DecoderException("Invalid header type on " + field + ": got " + value.getType()
                        + " but expected " + field.getType());
            }
            header.getHeaderFields().put(field, value);
        }
    }

    if (type != null) {
        checkRequiredHeaderFieldsPresent(header);
    }

    if (!buf.canAlignRead(8)) {
        buf.getBuffer().resetReaderIndex();
        return;
    }
    buf.alignRead(8);

    toRead = Math.toIntExact(header.getMessageBodyLength());
    byteOrder = order;
    out.add(header);
}

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From source file:buildcraft.core.lib.network.ChannelHandler.java

License:Minecraft Mod Public

@Override
protected void decode(ChannelHandlerContext ctx, FMLProxyPacket msg, List<Object> out) throws Exception {
    testMessageValidity(msg);/*from w w  w  . j ava 2 s .  c o  m*/
    ByteBuf payload = msg.payload();
    byte discriminator = payload.readByte();
    Class<? extends Packet> clazz = discriminators.get(discriminator);
    if (clazz == null) {
        throw new NullPointerException(
                "Undefined message for discriminator " + discriminator + " in channel " + msg.channel());
    }
    Packet newMsg = clazz.newInstance();
    ctx.attr(INBOUNDPACKETTRACKER).get().set(new WeakReference<FMLProxyPacket>(msg));
    newMsg.readData(payload.slice());
    out.add(newMsg);
}

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From source file:c5db.control.ByteBufInput.java

License:Apache License

/**
 * An input for a ByteBuffer/*from   w  w w .ja v a2  s.c o  m*/
 *
 * @param buffer            the buffer to read from, it will be sliced
 * @param protostuffMessage if we are parsing a protostuff (true) or protobuf (false) message
 */
public ByteBufInput(ByteBuf buffer, boolean protostuffMessage) {
    this.buffer = buffer.slice();
    this.buffer.markReaderIndex();
    this.decodeNestedMessageAsGroup = protostuffMessage;
}

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From source file:com.builtbroken.atomic.network.packet.PacketBase.java

@Override
public void decodeInto(ChannelHandlerContext ctx, ByteBuf buffer) {
    dataToRead = buffer.slice().copy();
}

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From source file:com.eightkdata.mongowp.bson.netty.ByteBufByteSource.java

License:Open Source License

public ByteBufByteSource(@Tight @ConservesIndexes ByteBuf byteBuf) {
    this.byteBuf = byteBuf.slice();
}

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From source file:com.mastfrog.scamper.compression.CompressingCodec.java

License:Open Source License

private MessageTypeAndBuffer decodeImpl(ByteBuf buf, ChannelHandlerContext ctx, int sctpChannel)
        throws Exception {
    MessageType messageType = reg.forByteBuf(buf);
    if (messageType.isUnknown()) {
        return new MessageTypeAndBuffer(messageType, buf.slice(), sctpChannel);
    }//from   w ww .j a va  2s  .  c o  m
    ByteBuf bb = ctx.alloc().buffer();
    uncompress(buf.slice(), bb);
    return new MessageTypeAndBuffer(messageType, bb, sctpChannel);
}

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From source file:com.savageboy74.savagetech.handler.packets.PacketPipeline.java

License:Open Source License

@Override
protected void decode(ChannelHandlerContext ctx, FMLProxyPacket msg, List<Object> out) throws Exception {
    ByteBuf payload = msg.payload();
    byte discriminator = payload.readByte();

    Class<? extends AbstractPacket> apClass = this.packets.get(discriminator);

    if (apClass == null) {
        throw new NullPointerException(Strings.Packets.NOT_REGISTERED + apClass.getCanonicalName());
    }//from   w  ww .  j  a v  a  2 s  .c o  m

    AbstractPacket abstractPacket = apClass.newInstance();
    abstractPacket.decodeInto(ctx, payload.slice());

    EntityPlayer player;
    switch (FMLCommonHandler.instance().getEffectiveSide()) {
    case CLIENT:
        player = Minecraft.getMinecraft().thePlayer;
        abstractPacket.handleClientSide(player);
        break;
    case SERVER:
        INetHandler handler = ctx.channel().attr(NetworkRegistry.NET_HANDLER).get();
        player = ((NetHandlerPlayServer) handler).playerEntity;
        abstractPacket.handleServerSide(player);
        break;
    default:
    }

    out.add(abstractPacket);
}

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From source file:com.tesora.dve.db.mysql.common.MysqlAPIUtils.java

License:Open Source License

public static ArrayList<Integer> locateLengthCodedStrings(ByteBuf cb, int skipAmount) {
    ArrayList<Integer> offsets = new ArrayList<>();
    ByteBuf slice = cb.slice().order(ByteOrder.LITTLE_ENDIAN);
    slice.skipBytes(skipAmount);/*from ww  w . j a v  a2 s.  co m*/
    while (slice.isReadable()) {
        offsets.add(slice.readerIndex());
        skipLengthCodedString(slice);
    }
    return offsets;
}

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From source file:com.tesora.dve.db.mysql.common.MysqlAPIUtils.java

License:Open Source License

/**
 * Returns a byte[] that matches the readable content of the provided ByteBuf.  If possible, this method will
 * return a direct reference to the backing array, rather than copy into a new array.  If the readable content
 * is smaller than the backing array, or there is no backing array because the buffer is direct, the contents
 * are copied into a new byte[].  The readIndex and writeIndex of the provided ByteBuf are not modified by this call.
 * @param cb source of bytes//from  w ww . j a  va 2  s  . co m
 * @return direct reference to backing byte[] data, or a copy if needed,
 */
public static byte[] unwrapOrCopyReadableBytes(ByteBuf cb) {
    if (cb.hasArray() && cb.readableBytes() == cb.array().length) {
        //already a heap array, and readable length is entire array
        return cb.array();
    } else {
        byte[] copy = new byte[cb.readableBytes()];
        cb.slice().readBytes(copy);
        return copy;
    }
}

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From source file:com.tesora.dve.db.mysql.libmy.MyBinaryResultRow.java

License:Open Source License

public void marshallRawValues(ByteBuf cb) {
    for (int i = 0; i < fieldSlices.size(); i++) {
        ByteBuf fieldSlice = fieldSlices.get(i);
        if (fieldSlice != null)
            cb.writeBytes(fieldSlice.slice());
    }/*from  w w  w  . ja v  a 2s  .co m*/
}

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