Example usage for io.netty.channel ChannelHandlerContext channel

List of usage examples for io.netty.channel ChannelHandlerContext channel

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Introduction

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

Prototype

Channel channel();

Source Link

Document

Return the Channel which is bound to the ChannelHandlerContext .

Usage

From source file:app.WebSocketServerHandler.java

License:Apache License

private void handleWebSocketFrame(ChannelHandlerContext ctx, WebSocketFrame frame) {

    // Check for closing frame
    if (frame instanceof CloseWebSocketFrame) {
        channels.remove(ctx.channel());
        handshaker.close(ctx.channel(), (CloseWebSocketFrame) frame.retain());
        return;/*from   w ww  . java2 s.  com*/
    }
    if (frame instanceof PingWebSocketFrame) {
        ctx.write(new PongWebSocketFrame(frame.content().retain()));
        return;
    }
    if (frame instanceof TextWebSocketFrame) {
        JSONObject msg = (JSONObject) JSONValue.parse(((TextWebSocketFrame) frame).text());

        if (msg == null) {
            System.out.println("Unknown message type");
            return;
        }

        switch (msg.get("type").toString()) {
        case "broadcast":
            final TextWebSocketFrame outbound = new TextWebSocketFrame(msg.toJSONString());
            channels.forEach(gc -> gc.writeAndFlush(outbound.duplicate().retain()));
            msg.replace("type", "broadcastResult");
            ctx.writeAndFlush(new TextWebSocketFrame(msg.toJSONString()));
            break;
        case "echo":
            ctx.writeAndFlush(new TextWebSocketFrame(msg.toJSONString()));
            break;
        default:
            System.out.println("Unknown message type");
        }

        return;
    }
}

From source file:app.WebSocketServerHandler.java

License:Apache License

private static void sendHttpResponse(ChannelHandlerContext ctx, FullHttpRequest req, FullHttpResponse res) {
    // Generate an error page if response getStatus code is not OK (200).
    if (res.status().code() != 200) {
        ByteBuf buf = Unpooled.copiedBuffer(res.status().toString(), CharsetUtil.UTF_8);
        res.content().writeBytes(buf);//from  ww w . j ava 2  s . co m
        buf.release();
        HttpUtil.setContentLength(res, res.content().readableBytes());
    }

    // Send the response and close the connection if necessary.
    ChannelFuture f = ctx.channel().writeAndFlush(res);
    if (!HttpUtil.isKeepAlive(req) || res.status().code() != 200) {
        f.addListener(ChannelFutureListener.CLOSE);
    }
}

From source file:at.yawk.accordion.netty.NettyConnector.java

License:Mozilla Public License

@Override
public Optional<Connection> connect(SocketAddress address) {
    // TODO find a non-hacky method to close channels
    Collection<Channel> registeredChannels = Collections.synchronizedList(new ArrayList<>());

    EventLoopGroup workerGroup = new NioEventLoopGroup() {
        @Override//w w  w  . j  av a  2 s.co  m
        public ChannelFuture register(Channel channel, ChannelPromise promise) {
            registeredChannels.add(channel);
            return super.register(channel, promise);
        }
    };

    AtomicReference<Connection> connectionRef = new AtomicReference<>();

    // init
    Bootstrap bootstrap = new Bootstrap().group(workerGroup).handler(new ChannelHandlerAdapter() {
        @Override
        public void handlerAdded(ChannelHandlerContext ctx) throws Exception {
            NettyConnection connection = new NettyConnection(ctx.channel());
            connectionRef.set(connection);
            connection.init();
        }
    }).channel(NioSocketChannel.class).option(ChannelOption.SO_KEEPALIVE, true);

    try {
        // connect
        ChannelFuture connectFuture = bootstrap.connect(address);
        // wait for connection
        connectFuture.sync();
        return Optional.of(connectionRef.get());
    } catch (Exception e) {
        // shut down workers
        workerGroup.shutdownGracefully();

        // kill channels
        registeredChannels.forEach(NettyConnection::close);

        return Optional.empty();
    }
}

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

@Override
protected void decode(ChannelHandlerContext ctx, AlignableByteBuf in, List<Object> out) throws Exception {
    MessageHeader header = ctx.channel().attr(Local.CURRENT_HEADER).get();
    if (header == null) {
        // message should be skipped
        return;//from   w w w.j ava2 s.  c  o m
    }

    DbusObject signature = header.getHeaderFields().get(HeaderField.SIGNATURE);
    if (signature == null) {
        throw new DecoderException("Non-empty body but missing signature header");
    }

    List<TypeDefinition> types = signature.typeValue();
    List<DbusObject> bodyObjects = new ArrayList<>();

    for (TypeDefinition type : types) {
        DbusObject object = type.deserialize(in);
        bodyObjects.add(object);

        log.trace("Decoded object {}", object);
    }

    MessageBody body = new MessageBody();
    body.setArguments(bodyObjects);
    out.add(body);
}

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

@Override
protected void channelRead0(ChannelHandlerContext ctx, Object msg) throws Exception {
    Attribute<MessageHeader> headerAttribute = ctx.channel().attr(Local.CURRENT_HEADER);
    if (msg instanceof MessageHeader) {
        if (((MessageHeader) msg).getMessageBodyLength() == 0) {
            DbusMessage message = new DbusMessage();
            message.setHeader((MessageHeader) msg);
            consumer.accept(message);//from w w  w  . ja  v  a 2 s. c o m
        } else {
            if (consumer.requireAccept((MessageHeader) msg)) {
                headerAttribute.set((MessageHeader) msg);
            } else {
                headerAttribute.set(null);
            }
        }
    } else if (msg instanceof MessageBody) {
        MessageHeader header = headerAttribute.get();
        if (header != null) {
            DbusMessage message = new DbusMessage();
            message.setHeader(header);
            message.setBody((MessageBody) msg);
            consumer.accept(message);
            headerAttribute.set(null);
        }
    } else {
        log.warn("Did not handle {}", msg);
    }
}

From source file:at.yawk.votifier.VotifierServerImpl.java

License:Mozilla Public License

public void init() {
    if (!initialized.compareAndSet(false, true)) {
        return;//from  w w w. j  a v  a2  s.  c o m
    }

    logger.info("Initializing votifier server...");
    EventLoopGroup bossGroup = new NioEventLoopGroup();
    EventLoopGroup workerGroup = new NioEventLoopGroup();
    bootstrap.group(bossGroup, workerGroup).channel(NioServerSocketChannel.class)
            .option(ChannelOption.SO_BACKLOG, 128).childOption(ChannelOption.SO_KEEPALIVE, true)
            .childHandler(new ChannelInitializer<SocketChannel>() {
                @Override
                public void handlerRemoved(ChannelHandlerContext ctx) throws Exception {
                    logger.fine("Client disconnected.");
                }

                @Override
                public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
                    handleError(cause);
                }

                @Override
                protected void initChannel(SocketChannel ch) throws Exception {
                    ch.pipeline().addLast(new VoteDecrypter(key)).addLast(new LineSplitter())
                            .addLast(new VoteDecoder()).addLast(new VersionEncoder())
                            .addLast(new ChannelInboundHandlerAdapter() {
                                @Override
                                public void channelRead(ChannelHandlerContext ctx, Object msg)
                                        throws Exception {
                                    if (!(msg instanceof Operation)) {
                                        return;
                                    }
                                    Operation operation = (Operation) msg;
                                    if (operation.getOperation().equals("VOTE")) {
                                        listener.accept(
                                                new VoteEvent(operation.getUsername(), operation.getService(),
                                                        operation.getAddress(), operation.getTimestamp()));
                                        ctx.channel().close();
                                    } else {
                                        throw new UnsupportedOperationException(operation.getOperation());
                                    }
                                }

                                @Override
                                public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause)
                                        throws Exception {
                                    handleError(cause);
                                }
                            });

                    logger.info("Client connected: Sending version packet.");
                    ch.writeAndFlush(version);
                }
            });
}

From source file:be.yildizgames.module.network.netty.client.AbstractClientMessageHandler.java

License:MIT License

@Override
public final void channelInactive(final ChannelHandlerContext ctx) throws Exception {
    super.channelInactive(ctx);
    this.callBack.connectionFailed();
    LOGGER.info("Netty channel closed: {}", ctx.channel());
}

From source file:be.yildizgames.module.network.netty.client.AbstractClientMessageHandler.java

License:MIT License

@Override
public final void exceptionCaught(final ChannelHandlerContext ctx, final Throwable e) {
    LOGGER.error("Exception", e);
    ctx.channel().close();
    callBack.connectionLost();/*from   w  ww .ja v a2s . c o  m*/
}

From source file:be.yildizgames.module.network.netty.client.SimpleWebSocketClientHandler.java

License:MIT License

@Override
public void channelActive(ChannelHandlerContext ctx) throws URISyntaxException {
    String host = ((InetSocketAddress) ctx.channel().remoteAddress()).getAddress().getHostAddress();
    int port = ((InetSocketAddress) ctx.channel().remoteAddress()).getPort();
    String uri = "ws://" + host + ":" + port + "/websocket";
    this.handshaker = WebSocketClientHandshakerFactory.newHandshaker(new URI(uri), WebSocketVersion.V13, null,
            false, new DefaultHttpHeaders());
    this.handshaker.handshake(ctx.channel());
}

From source file:be.yildizgames.module.network.netty.client.SimpleWebSocketClientHandler.java

License:MIT License

@Override
public void channelRead0(ChannelHandlerContext ctx, Object received) {
    Channel ch = ctx.channel();
    if (!handshaker.isHandshakeComplete()) {
        if (!(received instanceof FullHttpResponse)) {
            LOGGER.warn("Receiving message before handshake complete: {}", received);
            return;
        }//w  w  w .j  ava2  s .com
        FullHttpResponse handshake = FullHttpResponse.class.cast(received);
        LOGGER.debug("Handshake received: {}", handshake);
        handshaker.finishHandshake(ch, handshake);
        LOGGER.debug("Handshake complete.");
        handshakeFuture.setSuccess();
        this.callBack.handShakeComplete();
        return;
    }

    if (received instanceof TextWebSocketFrame) {
        String message = TextWebSocketFrame.class.cast(received).text();
        LOGGER.debug("Textframe received: {}", message);
        this.handleMessage(message);
    } else if (received instanceof CloseWebSocketFrame) {
        ch.close();
    }
}