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:p2p_server.DeviceHandler.java

@Override
public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
    // System.out.println("Dev recv msg " + msg);
    Gson json = new Gson();

    int msglen = msg.toString().length();
    String s = msg.toString() + "\r\n";
    Type type = new TypeToken<Map<String, String>>() {
    }.getType();//from  www.  j a  v a  2 s .co m
    Map<String, String> dict;
    dict = json.fromJson(s.substring(2, msglen), type);

    String cmd = "";
    try {
        cmd = dict.get(CMD).toString();
        //System.out.println("is login " + cmd);
    } catch (NullPointerException e) {
        write_error(ctx, unkown_cmd);
        return;
    }
    if (cmd.compareTo(LOGIN) == 0) {
        // System.out.println("login ok");
        String uuid = "";
        String pwd = "";
        try {
            uuid = dict.get(UUID).toString();
            pwd = dict.get(PWD).toString();
        } catch (NullPointerException ue) {
            write_error(ctx, unkown_format);
            return;
            // ue.printStackTrace();
        }
        /*??? */
        Object[] oldobj = null;
        try {
            oldobj = dc.getDevChannel(uuid);
        } catch (NullPointerException npe) {
        }

        if (oldobj != null) {
            /* ?  */
            Channel oldch = (Channel) oldobj[1];
            Map<String, String> notifyDict = new HashMap<>();
            notifyDict.put(MSG, "new login from " + ctx.channel().remoteAddress());
            String jsondata = json.toJson(notifyDict);
            ByteBuf sendbuf = oldch.alloc().heapBuffer(jsondata.toString().length() + 4);
            int len = jsondata.length() + 2;
            byte[] lenarry = { 0x0, 0x0 };
            lenarry[0] = (byte) (0xff00 & len);
            lenarry[1] = (byte) (0xff & len);
            sendbuf.writeBytes(lenarry);
            sendbuf.writeBytes(jsondata.toString().getBytes());
            sendbuf.writeBytes("\r\n\r\n".getBytes());
            ChannelFuture write = oldch.writeAndFlush(sendbuf);
            if (!write.isSuccess()) {
                System.out.println("notify new login failed: " + write.cause());
            }
            dc.removeDevChannel(uuid);
            write.addListener(ChannelFutureListener.CLOSE);
        }

        dc.bandUserAndChannel(uuid, pwd, ctx.channel());
        ByteBuf sendbuf = ctx.alloc().heapBuffer(msg_ok.length);
        sendbuf.writeBytes(msg_ok);
        // sendbuf.writeBytes(msg_ok);

        ChannelFuture write = ctx.channel().writeAndFlush(sendbuf);
        if (!write.isSuccess()) {

            System.out.println("send login failed: " + write.cause());
        }

    } else if (0 == cmd.compareTo(KEEP)) {
        //  System.out.println("keep ok");
        ByteBuf sendbuf = ctx.alloc().heapBuffer(msg.toString().length() + 4);
        sendbuf.writeBytes(msg.toString().getBytes());
        sendbuf.writeBytes("\r\n\r\n".getBytes());
        ChannelFuture write = ctx.writeAndFlush(sendbuf);

        if (!write.isSuccess()) {
            System.out.println("send keep failed: " + write.cause());
        }

    } else if (0 == cmd.compareTo(CONN)) {

        String aid = "";
        try {
            aid = dict.get(AID);
        } catch (NullPointerException ue) {
            //ue.printStackTrace();
            write_error(ctx, unkown_format);
            return;

        }
        // Promise<Channel> promise = ctx.executor().newPromise();

        // System.out.println("recv dev conn for aid "+aid);
        Channel appChannel = dc.getAppChannel(aid);
        //System.out.println("app dict size : " + dc.getMapSize("app"));

        if (appChannel instanceof Channel) {
            // System.out.println("ready send addr to app!!!!");
            ByteBuf sendbuf = appChannel.alloc().heapBuffer(msg.toString().length() + 4);
            sendbuf.writeBytes(msg.toString().getBytes());
            sendbuf.writeBytes("\r\n\r\n".getBytes());
            ChannelFuture write = appChannel.writeAndFlush(sendbuf);

            /* 
                if (!write.isSuccess()) {
                    System.out.println("send to app failed: " + write.cause());
                }
             */
            dc.removeAppChannel(aid);
            write.addListener(ChannelFutureListener.CLOSE);

        }

    } else {
        //?
        write_error(ctx, unkown_cmd);
    }

}

---

From source file:p2p_server.DeviceHandler.java

@Override
public void userEventTriggered(ChannelHandlerContext ctx, Object evt) throws Exception {
    if (IdleStateEvent.class.isAssignableFrom(evt.getClass())) {
        IdleStateEvent event = (IdleStateEvent) evt;

        // sendbuf.writeBytes(msg_ok);
        if (null != event.state()) {
            switch (event.state()) {
            case READER_IDLE:
                System.out.println("dev read idle");
                break;
            case WRITER_IDLE:
                System.out.println("dev write idle");
                break;
            case ALL_IDLE:
                System.out.println("dev all idle");
                break;
            default:
                break;
            }/*from   ww w  .  ja  v  a 2s  .c o  m*/
        }
        ByteBuf sendbuf = ctx.alloc().heapBuffer(msg_keep.length);
        sendbuf.writeBytes(msg_keep);
        ChannelFuture write = ctx.channel().writeAndFlush(sendbuf);
        if (!write.isSuccess()) {

            System.out.println("send login failed: " + write.cause());
        }
    }
}

---

From source file:ratpack.server.internal.NettyHandlerAdapter.java

License:Apache License

public void channelRead0(final ChannelHandlerContext ctx, final FullHttpRequest nettyRequest) throws Exception {
    if (!nettyRequest.decoderResult().isSuccess()) {
        sendError(ctx, HttpResponseStatus.BAD_REQUEST);
        nettyRequest.release();/*from  w  w  w. ja v  a 2s  .  c  o  m*/
        return;
    }

    final Channel channel = ctx.channel();
    InetSocketAddress remoteAddress = (InetSocketAddress) channel.remoteAddress();
    InetSocketAddress socketAddress = (InetSocketAddress) channel.localAddress();

    final ServerConfig serverConfig = rootRegistry.get(ServerConfig.class);
    final Request request = new DefaultRequest(new NettyHeadersBackedHeaders(nettyRequest.headers()),
            nettyRequest.method(), nettyRequest.uri(), remoteAddress, socketAddress, nettyRequest.content());
    final HttpHeaders nettyHeaders = new DefaultHttpHeaders(false);
    final MutableHeaders responseHeaders = new NettyHeadersBackedMutableHeaders(nettyHeaders);
    final DefaultEventController<RequestOutcome> requestOutcomeEventController = new DefaultEventController<>();
    final AtomicBoolean transmitted = new AtomicBoolean(false);

    final DefaultResponseTransmitter responseTransmitter = new DefaultResponseTransmitter(transmitted,
            execControl, channel, nettyRequest, request, nettyHeaders, requestOutcomeEventController);

    ctx.attr(RESPONSE_TRANSMITTER_ATTRIBUTE_KEY).set(responseTransmitter);

    Action<Action<Object>> subscribeHandler = thing -> {
        transmitted.set(true);
        ctx.attr(CHANNEL_SUBSCRIBER_ATTRIBUTE_KEY).set(thing);
    };

    final DirectChannelAccess directChannelAccess = new DefaultDirectChannelAccess(channel, subscribeHandler);

    final DefaultContext.RequestConstants requestConstants = new DefaultContext.RequestConstants(
            applicationConstants, request, directChannelAccess, requestOutcomeEventController.getRegistry());

    final Response response = new DefaultResponse(execControl, responseHeaders, ctx.alloc(),
            responseTransmitter, requestConstants);
    requestConstants.response = response;

    DefaultContext.start(channel.eventLoop(), execController.getControl(), requestConstants, rootRegistry,
            handlers, execution -> {
                if (!transmitted.get()) {
                    Handler lastHandler = requestConstants.handler;
                    StringBuilder description = new StringBuilder();
                    description.append("No response sent for ").append(request.getMethod().getName())
                            .append(" request to ").append(request.getUri()).append(" (last handler: ");

                    if (lastHandler instanceof DescribingHandler) {
                        ((DescribingHandler) lastHandler).describeTo(description);
                    } else {
                        DescribingHandlers.describeTo(lastHandler, description);
                    }

                    description.append(")");
                    String message = description.toString();
                    LOGGER.warn(message);

                    response.status(500);

                    if (serverConfig.isDevelopment()) {
                        response.send(message);
                    } else {
                        response.send();
                    }
                }
            });
}

---

From source file:reactor.io.net.impl.netty.NettyChannelHandlerBridge.java

License:Apache License

protected static ByteBuf convertBufferToByteBuff(ChannelHandlerContext ctx, Buffer data) {
    ByteBuf buff = ctx.alloc().buffer(data.remaining());
    return buff.writeBytes(data.byteBuffer());
}

---

From source file:reactor.io.net.impl.netty.NettyChannelHandlerBridge.java

License:Apache License

private static ByteBuf createCombinedBuffer(ByteBuf partOne, ByteBuf partTwo, ChannelHandlerContext ctx) {
    ByteBuf combined = ctx.alloc().buffer(partOne.readableBytes() + partTwo.readableBytes());
    combined.writeBytes(partOne);/* www . j a v a2  s  .  co  m*/
    combined.writeBytes(partTwo);
    return combined;
}

---

From source file:reactor.io.net.impl.netty.NettyNetChannelInboundHandler.java

License:Apache License

private ByteBuf createCombinedBuffer(ByteBuf partOne, ByteBuf partTwo, ChannelHandlerContext ctx) {
    ByteBuf combined = ctx.alloc().buffer(partOne.readableBytes() + partTwo.readableBytes());
    combined.writeBytes(partOne);/*from  ww  w.ja  v  a2s.  co  m*/
    combined.writeBytes(partTwo);
    return combined;
}

---

From source file:reactor.ipc.netty.http.client.HttpClientFormEncoder.java

License:Open Source License

@Deprecated
@Override/* w ww . j  a va  2 s  . c om*/
public HttpContent readChunk(ChannelHandlerContext ctx) throws Exception {
    return readChunk(ctx.alloc());
}

---

From source file:ru.calypso.ogar.server.net.PacketEncoder.java

License:Open Source License

@SuppressWarnings({ "unchecked", "rawtypes" })
@Override//from w ww. jav  a2  s  . c om
protected void encode(ChannelHandlerContext ctx, Packet packet, List out) throws Exception {
    ByteBuf buf = ctx.alloc().buffer().order(ByteOrder.LITTLE_ENDIAN);
    int packetId = PacketRegistry.SERVER2CLIENT.getPacketId(packet.getClass());
    if (packetId == -1) {
        throw new IllegalArgumentException("Provided packet is not registered as a clientbound packet!");
    }

    buf.writeByte(packetId);
    packet.writeData(buf);
    new BinaryWebSocketFrame(buf);
    out.add(new BinaryWebSocketFrame(buf));

    Log.logDebug("Sent packet ID " + packetId + " (" + packet.getClass().getSimpleName() + ") to "
            + ctx.channel().remoteAddress());
}

---

From source file:se.sics.kompics.network.netty.MessageEncoder.java

License:Open Source License

@Override
protected void encode(ChannelHandlerContext ctx, Msg msg, List<Object> outL) throws Exception {
    ByteBuf out = ctx.alloc().buffer(NettyNetwork.INITIAL_BUFFER_SIZE, NettyNetwork.SEND_BUFFER_SIZE);
    NettyNetwork.LOG.trace("Trying to encode outgoing data to {} from {}.", ctx.channel().remoteAddress(),
            ctx.channel().localAddress());
    int startIdx = out.writerIndex();
    out.writeBytes(LENGTH_PLACEHOLDER);/*  w  w w .ja va 2 s  . c  o m*/

    Serializers.toBinary(msg, out);

    int endIdx = out.writerIndex();
    int diff = endIdx - startIdx - LENGTH_PLACEHOLDER.length;
    if (diff > 65532) { //2^16 - 2bytes for the length header (snappy wants no more than 65536 bytes uncompressed)
        throw new Exception("Can't encode message longer than 65532 bytes!");
    }
    out.setShort(startIdx, diff);
    NettyNetwork.LOG.trace("Encoded outgoing {} bytes of data to {}: {}.",
            new Object[] { diff, ctx.channel().remoteAddress(), ByteBufUtil.hexDump(out) });
    outL.add(out);
}

---

From source file:shi.cs.MqttEncoder.java

License:Apache License

@Override
protected void encode(ChannelHandlerContext ctx, MqttMessage msg, List<Object> out) throws Exception {
    out.add(doEncode(ctx.alloc(), msg));
}

---

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