Example usage for io.netty.channel ChannelHandlerContext alloc

Introduction

In this page you can find the example usage for io.netty.channel ChannelHandlerContext alloc.

Prototype

ByteBufAllocator alloc();

Source Link

Document

Return the assigned ByteBufAllocator which will be used to allocate ByteBuf s.

Usage

From source file:com.tesora.dve.db.mysql.portal.protocol.MyBackendDecoder.java

License:Open Source License

protected void decode0(ChannelHandlerContext ctx, ByteBuf in, List<Object> out, boolean lastPacket)
        throws Exception {
    if (logger.isDebugEnabled())
        logger.debug("processing packet, " + in);

    try {//from www  . ja  v a2 s. c  o  m
        //get a contextual parser that decodes data based on what was previously transmitted, never null.
        ParseStrategy responseParser = lookupParser();
        int expectedSequence = responseParser.nextSequenceNumber();

        if (mspPacket == null)
            mspPacket = new Packet(ctx.alloc(), expectedSequence, Packet.Modifier.HEAPCOPY_ON_READ, "backend");

        if (!mspPacket.decodeMore(in)) //deals with framing and extended packets.
            return;

        //we got a packet, maybe extended.  update the next expected sequence (might be > +1, if extended)
        responseParser.setNextSequenceNumber(mspPacket.getNextSequenceNumber());

        ByteBuf leHeader = mspPacket.unwrapHeader().order(ByteOrder.LITTLE_ENDIAN).retain();
        ByteBuf lePayload = mspPacket.unwrapPayload().order(ByteOrder.LITTLE_ENDIAN).retain();//retain a separate reference to the payload.
        mspPacket.release();
        mspPacket = null;

        //ok, we aren't waiting for a packet anymore, end the wait timer, start the decode timer.
        responseParser.endAtomicWaitTimer();
        Timer decodeTimer = responseParser.getNewSubTimer(TimingDesc.BACKEND_DECODE);

        //use the active response parser to decode the buffer into a protocol message.
        MyMessage message = responseParser.parsePacket(ctx, leHeader, lePayload);
        decodeTimer.end(socketDesc, (message == null ? "null" : message.getClass().getName()));

        lookupParser();//check if we are done and pop the parser now, to reduce memory usage and get tighter timer measurements.

        if (message != null) {
            out.add(message);
        }

    } catch (Exception e) {
        logger.warn(String.format("Unexpected problem parsing frame, closing %s :", socketDesc), e);
        ctx.close();
    }
}

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From source file:com.topsec.bdc.platform.api.test.discard.DiscardClientHandler.java

License:Apache License

@Override
public void channelActive(ChannelHandlerContext ctx) {

    this.ctx = ctx;

    // Initialize the message.
    content = ctx.alloc().directBuffer(DiscardClient.SIZE).writeZero(DiscardClient.SIZE);

    // Send the initial messages.
    generateTraffic();/*from www  .  j  a  v  a2 s .c o m*/
}

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From source file:com.torchmind.netty.msgpack.codec.MessageFrameCodec.java

License:Apache License

/**
 * {@inheritDoc}// w  ww. ja v a 2 s  .  c o  m
 */
@Override
protected void decode(ChannelHandlerContext ctx, ByteBuf in, List<Object> out) throws Exception {
    while (in.readableBytes() >= 4) {
        // mark reader index
        in.markReaderIndex();

        // read length
        int length = in.readInt();

        // check whether enough data is available
        if (length > in.readableBytes()) {
            // reset index
            in.resetReaderIndex();

            // skip further execution due to missing data
            break;
        }

        // read buffer
        ByteBuf buffer = ctx.alloc().buffer(length);
        in.readBytes(buffer);

        // append to output
        out.add(buffer);
    }
}

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From source file:com.turo.pushy.apns.ApnsClientHandler.java

License:Open Source License

private void writePushNotification(final ChannelHandlerContext context,
        final PushNotificationPromise responsePromise, final ChannelPromise writePromise) {
    if (context.channel().isActive()) {
        final int streamId = this.connection().local().incrementAndGetNextStreamId();

        if (streamId > 0) {
            // We'll attach the push notification and response promise to the stream as soon as the stream is created.
            // Because we're using a StreamBufferingEncoder under the hood, there's no guarantee as to when the stream
            // will actually be created, and so we attach these in the onStreamAdded listener to make sure everything
            // is happening in a predictable order.
            this.unattachedResponsePromisesByStreamId.put(streamId, responsePromise);
            final ApnsPushNotification pushNotification = responsePromise.getPushNotification();

            final Http2Headers headers = getHeadersForPushNotification(pushNotification, streamId);

            final ChannelPromise headersPromise = context.newPromise();
            this.encoder().writeHeaders(context, streamId, headers, 0, false, headersPromise);
            log.trace("Wrote headers on stream {}: {}", streamId, headers);

            final ByteBuf payloadBuffer = context.alloc().ioBuffer(INITIAL_PAYLOAD_BUFFER_CAPACITY);
            payloadBuffer.writeBytes(pushNotification.getPayload().getBytes(StandardCharsets.UTF_8));

            final ChannelPromise dataPromise = context.newPromise();
            this.encoder().writeData(context, streamId, payloadBuffer, 0, true, dataPromise);
            log.trace("Wrote payload on stream {}: {}", streamId, pushNotification.getPayload());

            final PromiseCombiner promiseCombiner = new PromiseCombiner();
            promiseCombiner.addAll((ChannelFuture) headersPromise, dataPromise);
            promiseCombiner.finish(writePromise);

            writePromise.addListener(new GenericFutureListener<ChannelPromise>() {

                @Override/*from w  ww .j ava  2  s  .co m*/
                public void operationComplete(final ChannelPromise future) {
                    if (!future.isSuccess()) {
                        log.trace("Failed to write push notification on stream {}.", streamId, future.cause());
                        responsePromise.tryFailure(future.cause());
                    }
                }
            });
        } else {
            // This is very unlikely, but in the event that we run out of stream IDs, we need to open a new
            // connection. Just closing the context should be enough; automatic reconnection should take things
            // from there.
            writePromise.tryFailure(STREAMS_EXHAUSTED_EXCEPTION);
            context.channel().close();
        }
    } else {
        writePromise.tryFailure(STREAM_CLOSED_BEFORE_REPLY_EXCEPTION);
    }
}

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From source file:com.uber.tchannel.codecs.MessageCodec.java

License:Open Source License

public static ChannelFuture write(ChannelHandlerContext ctx, Frame frame) {
    ChannelFuture f = ctx.writeAndFlush(encode(ctx.alloc(), encode(ctx.alloc(), frame)));
    f.addListener(ChannelFutureListener.FIRE_EXCEPTION_ON_FAILURE);
    return f;/*w ww  .  j av  a 2  s. c o m*/
}

---

From source file:com.uber.tchannel.handlers.MessageFragmenter.java

License:Open Source License

protected void writeFrames(ChannelHandlerContext ctx, RawMessage msg, List<Object> frames) throws Exception {
    List<ByteBuf> args = new ArrayList<>();
    args.add(msg.getArg1());//from   w  ww  . j a  va  2 s.c  o  m
    args.add(msg.getArg2());
    args.add(msg.getArg3());

    CallFrame frame = null;
    while (!args.isEmpty()) {
        if (frame == null || frame.isPayloadFull()) {
            frame = createFrame(msg, args.size());
        }

        frame.encodePayload(ctx.alloc(), args);
        frames.add(MessageCodec.encode(ctx.alloc(), MessageCodec.encode(ctx.alloc(), frame)));
    }
}

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From source file:com.uber.tchannel.handlers.PingHandler.java

License:Open Source License

@Override
protected void messageReceived(ChannelHandlerContext ctx, PingRequestFrame msg) throws Exception {
    ctx.writeAndFlush(MessageCodec.encode(ctx.alloc(), new PingResponseFrame(msg.getId())));
}

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From source file:com.vethrfolnir.game.network.mu.MuChannelHandler.java

License:Open Source License

@Override
public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
    ByteBuf buff = (msg instanceof ByteBuffer) ? ctx.alloc().buffer().writeBytes((ByteBuffer) msg)
            : (ByteBuf) msg;/*from   w  ww. j  a  v  a2 s . c om*/

    buff.readerIndex(2);

    int opcode = buff.readUnsignedByte();
    switch (opcode) { // double opcode
    case 0xf1:
    case 0xf3:
    case 0x0e:
    case 0x03:
        buff.readerIndex(buff.readerIndex() - 1);
        opcode = buff.readUnsignedShort(); // ex 0xF1_03
        break;
    default:
        break;
    }

    if (opcode == 0xe00) { // Time packet?
        buff.clear();
        buff.release();
        return;
    }

    ReadPacket packet = clientpackets.get(opcode);

    if (packet != null) {
        MuClient client = ctx.channel().attr(MuClient.ClientKey).get();
        //System.out.println("Got opcode: 0x"+PrintData.fillHex(opcode, 2)+ " packet = \n"+packet.getClass().getSimpleName());
        packet.read(client, buff);
    } else {
        log.warn("Unknown packet[opcode = 0x" + PrintData.fillHex(opcode, 2) + "]. Dump: ");
        log.warn(PrintData.printData(buff.nioBuffer(0, buff.writerIndex())));
    }

    //log.warn(PrintData.printData(buff.nioBuffer(0, buff.writerIndex())));

    if (buff.refCnt() > 0) {
        //System.out.println("Handler Release when packet[opcode = 0x"+PrintData.fillHex(opcode, 2)+"]");
        buff.release();
    }
}

---

From source file:com.vethrfolnir.game.network.mu.MuCyperDecoder.java

License:Open Source License

@Override
protected void decode(ChannelHandlerContext ctx, ByteBuf in, List<Object> out) throws Exception {

    if (!in.isReadable()) {
        MuClient client = ctx.channel().attr(MuClient.ClientKey).get();
        _log.warn("Client[" + client + "] sent an empty packet!");

        return; //XXX: is it critical?
    }/*  w w  w .  j  av  a2s . c  om*/

    if (in.readableBytes() < 3) {
        return; // come back later
    }

    in.markReaderIndex();

    int opcode = in.readUnsignedByte();

    int lengthAt = 0;
    switch (opcode) {
    case 0xc1:
    case 0xc3:
        lengthAt = 1;
        break;
    case 0xc2:
    case 0xc4:
        lengthAt = 2;
        break;
    }

    //in.markReaderIndex();
    int rez = lengthAt > 1 ? in.readShort() : in.readUnsignedByte();
    in.resetReaderIndex();

    //System.out.println("1 Size[point="+(lengthAt > 1 ? "Short" : "Unsigned byte")+"]: "+rez+" opcode "+Integer.toHexString(opcode & 0xFF));
    if (in.readableBytes() < rez) {
        in.resetReaderIndex();
        return;
    }

    int header = in.getUnsignedByte(0);
    if (header == 0xC1 || header == 0xC2) {
        ByteBuf buff = ctx.alloc().heapBuffer(rez);
        in.readBytes(buff);
        out.add(DecodeXor32(buff));
    } else {
        out.add(DecodePacket(in));
    }
}

---

From source file:com.vethrfolnir.login.network.mu.ClientChannelHandler.java

License:Open Source License

@Override
public void channelRegistered(ChannelHandlerContext ctx) throws Exception {
    if (nameService.liveServerSize() > 0) {
        ByteBuf buff = ctx.alloc().buffer(4);
        ctx.writeAndFlush(buff.writeBytes(new byte[] { (byte) 0xC1, 0x04, 0x00, 0x01 }));
    }//from  w  w w . j  a v  a 2s  . c  o  m
}

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