Example usage for io.netty.buffer ByteBuf slice

List of usage examples for io.netty.buffer ByteBuf slice

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Introduction

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

Prototype

public abstract ByteBuf slice(int index, int length);

Source Link

Document

Returns a slice of this buffer's sub-region.

Usage

From source file:org.virtue.network.session.impl.OnDemandSession.java

License:Open Source License

/**
 * Processes a request and then send the data to the encoder
 *///from   www  .j a v  a 2  s .  co  m
public void processFileQueue() {
    OnDemandRequestMessage request;

    synchronized (fileQueue) {
        request = fileQueue.pop();
        if (fileQueue.isEmpty()) {
            idle = true;
        } else {
            service.addPendingSession(this);
            idle = false;
        }
    }

    if (request != null) {
        int type = request.getType();
        int file = request.getFile();

        Cache cache = Virtue.getInstance().getCache();
        ByteBuf buf;

        try {
            if (type == 255 && file == 255) {
                buf = Unpooled.wrappedBuffer(Virtue.getInstance().getChecksumTable());
            } else {
                buf = Unpooled.wrappedBuffer(cache.getStore().read(type, file));
                if (type != 255) {
                    buf = buf.slice(0, buf.readableBytes() - 2);
                }
            }
            channel.writeAndFlush(new OnDemandResponseMessage(request.isPriority(), type, file, buf));
        } catch (IOException ex) {
            logger.warn("Failed to service file request " + type + ", " + file + ".", ex);
        }
    }
}

From source file:org.waarp.openr66.protocol.networkhandler.packet.NetworkPacketCodec.java

License:Open Source License

@Override
protected void decode(ChannelHandlerContext ctx, ByteBuf buf, List<Object> out) throws Exception {
    // Make sure if the length field was received.
    if (buf.readableBytes() < 4) {
        // The length field was not received yet - return null.
        // This method will be invoked again when more packets are
        // received and appended to the buffer.
        return;//  w  ww . j  a  v  a  2s .  c  om
    }
    // Mark the current buffer position
    buf.markReaderIndex();
    // Read the length field
    final int length = buf.readInt();
    if (length < 9) {
        throw new OpenR66ProtocolPacketException(
                "Incorrect decode first field in Network Packet: " + length + " < 9");
    }
    if (buf.readableBytes() < length) {
        buf.resetReaderIndex();
        return;
    }
    // Now we can read the two Ids
    final int localId = buf.readInt();
    final int remoteId = buf.readInt();
    final byte code = buf.readByte();
    int readerInder = buf.readerIndex();
    ByteBuf buffer = buf.slice(readerInder, length - 9);
    buffer.retain();
    buf.skipBytes(length - 9);
    NetworkPacket networkPacket = new NetworkPacket(localId, remoteId, code, buffer);
    if (code == LocalPacketFactory.KEEPALIVEPACKET) {
        KeepAlivePacket keepAlivePacket = (KeepAlivePacket) LocalPacketCodec
                .decodeNetworkPacket(networkPacket.getBuffer());
        if (keepAlivePacket.isToValidate()) {
            keepAlivePacket.validate();
            NetworkPacket response = new NetworkPacket(ChannelUtils.NOCHANNEL, ChannelUtils.NOCHANNEL,
                    keepAlivePacket, null);
            NetworkChannelReference nc = NetworkTransaction.getImmediateNetworkChannel(ctx.channel());
            if (nc != null) {
                nc.useIfUsed();
            }
            ctx.writeAndFlush(response.getNetworkPacket());
            buffer.release();
        }
        // Replaced by a NoOp packet
        networkPacket = new NetworkPacket(localId, remoteId, new NoOpPacket(), null);
        NetworkServerHandler nsh = (NetworkServerHandler) ctx.pipeline().last();
        nsh.setKeepAlivedSent();
    }
    out.add(networkPacket);
}

From source file:org.waarp.openr66.proxy.network.NetworkPacketCodec.java

License:Open Source License

@Override
protected void decode(ChannelHandlerContext ctx, ByteBuf buf, List<Object> out) throws Exception {
    // Make sure if the length field was received.
    if (buf.readableBytes() < 4) {
        // The length field was not received yet - return null.
        // This method will be invoked again when more packets are
        // received and appended to the buffer.
        return;//  www . j a  va  2 s  .  co m
    }
    // Mark the current buffer position
    buf.markReaderIndex();
    // Read the length field
    final int length = buf.readInt();
    if (buf.readableBytes() < length) {
        buf.resetReaderIndex();
        return;
    }
    // Now we can read the two Ids
    // Slight change in Proxy = first is remote and second is local!
    final int remoteId = buf.readInt();
    final int localId = buf.readInt();
    final byte code = buf.readByte();
    int readerInder = buf.readerIndex();
    ByteBuf buffer = buf.slice(readerInder, length - 9);
    buffer.retain();
    buf.skipBytes(length - 9);
    NetworkPacket networkPacket = new NetworkPacket(localId, remoteId, code, buffer);
    if (code == LocalPacketFactory.KEEPALIVEPACKET) {
        KeepAlivePacket keepAlivePacket = (KeepAlivePacket) LocalPacketCodec
                .decodeNetworkPacket(networkPacket.getBuffer());
        if (keepAlivePacket.isToValidate()) {
            keepAlivePacket.validate();
            NetworkPacket response = new NetworkPacket(ChannelUtils.NOCHANNEL, ChannelUtils.NOCHANNEL,
                    keepAlivePacket, null);
            ctx.writeAndFlush(response.getNetworkPacket());
        }
        // Replaced by a NoOp packet
        networkPacket = new NetworkPacket(localId, remoteId, new NoOpPacket(), null);
        NetworkServerHandler nsh = (NetworkServerHandler) ctx.pipeline().last();
        nsh.setKeepAlivedSent();
    }
    out.add(networkPacket);
}

From source file:util.MarshallingDecoder.java

protected Object decode(ByteBuf frame) throws IOException, ClassNotFoundException {
    int objectSize = frame.readInt();
    ByteBuf buf = frame.slice(frame.readerIndex(), objectSize);
    ByteInput input = new ChannelBufferByteInput(buf);

    try {//from ww  w  .jav a2s. c  o  m
        unmarshaller.start(input);
        Object obj = unmarshaller.readObject();
        unmarshaller.finish();
        frame.readerIndex(frame.readerIndex() + objectSize);

        return obj;
    } finally {
        unmarshaller.close();
    }
}

From source file:whitespell.net.websockets.socketio.transport.FlashPolicyHandler.java

License:Apache License

@Override
public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
    if (msg instanceof ByteBuf) {
        ByteBuf message = (ByteBuf) msg;
        ByteBuf data = message.slice(0, requestBuffer.readableBytes());
        if (data.equals(requestBuffer)) {
            message.release();//w  ww. j a  v a2  s.  co  m
            ChannelFuture f = ctx.writeAndFlush(responseBuffer);
            f.addListener(ChannelFutureListener.CLOSE);
            return;
        }
        ctx.pipeline().remove(this);
    }
    ctx.fireChannelRead(msg);
}