Example usage for io.netty.channel ChannelHandlerContext executor

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

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Introduction

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

Prototype

EventExecutor executor();

Source Link

Document

Returns the EventExecutor which is used to execute an arbitrary task.

Usage

From source file:com.just.server.http.http.WebSocketFrameHandler.java

License:Apache License

@Override
protected void channelRead0(final ChannelHandlerContext ctx, WebSocketFrame frame) throws Exception {
    // ping and pong frames already handled

    if (frame instanceof TextWebSocketFrame) {
        // Send the uppercase string back.
        String request = ((TextWebSocketFrame) frame).text();
        logger.info("{} received {}", ctx.channel(), request);
        if (request.equals("data")) {
            ScheduledExecutorService executorService = Executors.newSingleThreadScheduledExecutor();
            executorService.scheduleAtFixedRate(new CalculateEnvTask(), 0, timeInterval, TimeUnit.SECONDS);
            ctx.executor().scheduleAtFixedRate(new Runnable() {
                @Override/*from   w  w w  . j  a  v a 2s .c  o  m*/
                public void run() {
                    Environment env = null;
                    if ((env = CalculateEnvTask.cache.poll()) != null) {
                        JSONObject jsonObject = new JSONObject();
                        try {
                            jsonObject.put("ip", env.getIP());
                            jsonObject.put("netmask", env.getNetMask());
                            jsonObject.put("cpu", env.getCPUPercent());
                            jsonObject.put("mem", env.getMemPercent());
                            jsonObject.put("rx", env.getRxbps());
                            jsonObject.put("tx", env.getTxbps());
                        } catch (JSONException e) {
                            e.printStackTrace();
                        }
                        ctx.channel().writeAndFlush(new TextWebSocketFrame(String.valueOf(jsonObject)));
                    }
                }
            }, 0, timeInterval, TimeUnit.SECONDS);
        }

    } else {
        String message = "unsupported frame type: " + frame.getClass().getName();
        throw new UnsupportedOperationException(message);
    }
}

From source file:com.lampard.netty4.protocol.netty.client.HeartBeatReqHandler.java

License:Apache License

@Override
public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
    NettyMessage message = (NettyMessage) msg;
    // ?????//  ww  w . jav a  2  s .c  o  m
    if (message.getHeader() != null && message.getHeader().getType() == MessageType.LOGIN_RESP.value()) {
        heartBeat = ctx.executor().scheduleAtFixedRate(new HeartBeatReqHandler.HeartBeatTask(ctx), 0, 5000,
                TimeUnit.MILLISECONDS);
    } else if (message.getHeader() != null
            && message.getHeader().getType() == MessageType.HEARTBEAT_RESP.value()) {
        LOG.info("Client receive server heart beat message : ---> " + message);
    } else
        ctx.fireChannelRead(msg);
}

From source file:com.linecorp.armeria.internal.ConnectionLimitingHandler.java

License:Apache License

@Override
@SuppressWarnings("unchecked")
public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
    final Channel child = (Channel) msg;

    int conn = numConnections.incrementAndGet();
    if (conn > 0 && conn <= maxNumConnections) {
        childChannels.add(child);/*from w  w  w . java  2s  .  c o m*/
        child.closeFuture().addListener(future -> {
            childChannels.remove(child);
            numConnections.decrementAndGet();
        });
        super.channelRead(ctx, msg);
    } else {
        numConnections.decrementAndGet();

        // Set linger option to 0 so that the server doesn't get too many TIME_WAIT states.
        child.config().setOption(ChannelOption.SO_LINGER, 0);
        child.unsafe().closeForcibly();

        numDroppedConnections.increment();

        if (loggingScheduled.compareAndSet(false, true)) {
            ctx.executor().schedule(this::writeNumDroppedConnectionsLog, 1, TimeUnit.SECONDS);
        }
    }
}

From source file:com.look.netty.demo.socksproxy.SocksServerConnectHandler.java

License:Apache License

@Override
public void channelRead0(final ChannelHandlerContext ctx, final SocksMessage message) throws Exception {
    if (message instanceof Socks4CommandRequest) {
        final Socks4CommandRequest request = (Socks4CommandRequest) message;
        Promise<Channel> promise = ctx.executor().newPromise();
        promise.addListener(new FutureListener<Channel>() {
            @Override//from  ww w  . j  ava 2s. c  o m
            public void operationComplete(final Future<Channel> future) throws Exception {
                final Channel outboundChannel = future.getNow();
                if (future.isSuccess()) {
                    ChannelFuture responseFuture = ctx.channel()
                            .writeAndFlush(new DefaultSocks4CommandResponse(Socks4CommandStatus.SUCCESS));

                    responseFuture.addListener(new ChannelFutureListener() {
                        @Override
                        public void operationComplete(ChannelFuture channelFuture) {
                            ctx.pipeline().remove(SocksServerConnectHandler.this);
                            outboundChannel.pipeline().addLast(new RelayHandler(ctx.channel()));
                            ctx.pipeline().addLast(new RelayHandler(outboundChannel));
                        }
                    });
                } else {
                    ctx.channel().writeAndFlush(
                            new DefaultSocks4CommandResponse(Socks4CommandStatus.REJECTED_OR_FAILED));
                    SocksServerUtils.closeOnFlush(ctx.channel());
                }
            }
        });

        final Channel inboundChannel = ctx.channel();
        b.group(inboundChannel.eventLoop()).channel(NioSocketChannel.class)
                .option(ChannelOption.CONNECT_TIMEOUT_MILLIS, 10000).option(ChannelOption.SO_KEEPALIVE, true)
                .handler(new DirectClientHandler(promise));

        b.connect(request.dstAddr(), request.dstPort()).addListener(new ChannelFutureListener() {
            @Override
            public void operationComplete(ChannelFuture future) throws Exception {
                if (future.isSuccess()) {
                    // Connection established use handler provided results
                } else {
                    // Close the connection if the connection attempt has failed.
                    ctx.channel().writeAndFlush(
                            new DefaultSocks4CommandResponse(Socks4CommandStatus.REJECTED_OR_FAILED));
                    SocksServerUtils.closeOnFlush(ctx.channel());
                }
            }
        });
    } else if (message instanceof Socks5CommandRequest) {
        final Socks5CommandRequest request = (Socks5CommandRequest) message;
        Promise<Channel> promise = ctx.executor().newPromise();
        promise.addListener(new FutureListener<Channel>() {
            @Override
            public void operationComplete(final Future<Channel> future) throws Exception {
                final Channel outboundChannel = future.getNow();
                if (future.isSuccess()) {
                    ChannelFuture responseFuture = ctx.channel().writeAndFlush(new DefaultSocks5CommandResponse(
                            Socks5CommandStatus.SUCCESS, request.dstAddrType()));

                    responseFuture.addListener(new ChannelFutureListener() {
                        @Override
                        public void operationComplete(ChannelFuture channelFuture) {
                            ctx.pipeline().remove(SocksServerConnectHandler.this);
                            outboundChannel.pipeline().addLast(new RelayHandler(ctx.channel()));
                            ctx.pipeline().addLast(new RelayHandler(outboundChannel));
                        }
                    });
                } else {
                    ctx.channel().writeAndFlush(new DefaultSocks5CommandResponse(Socks5CommandStatus.FAILURE,
                            request.dstAddrType()));
                    SocksServerUtils.closeOnFlush(ctx.channel());
                }
            }
        });

        final Channel inboundChannel = ctx.channel();
        b.group(inboundChannel.eventLoop()).channel(NioSocketChannel.class)
                .option(ChannelOption.CONNECT_TIMEOUT_MILLIS, 10000).option(ChannelOption.SO_KEEPALIVE, true)
                .handler(new DirectClientHandler(promise));

        b.connect(request.dstAddr(), request.dstPort()).addListener(new ChannelFutureListener() {
            @Override
            public void operationComplete(ChannelFuture future) throws Exception {
                if (future.isSuccess()) {
                    // Connection established use handler provided results
                } else {
                    // Close the connection if the connection attempt has failed.
                    ctx.channel().writeAndFlush(new DefaultSocks5CommandResponse(Socks5CommandStatus.FAILURE,
                            request.dstAddrType()));
                    SocksServerUtils.closeOnFlush(ctx.channel());
                }
            }
        });
    } else {
        ctx.close();
    }
}

From source file:com.mongodb.connection.netty.ReadTimeoutHandler.java

License:Apache License

void scheduleTimeout(final ChannelHandlerContext ctx) {
    isTrue("Handler called from the eventLoop", ctx.channel().eventLoop().inEventLoop());
    if (timeout == null) {
        timeout = ctx.executor().schedule(new ReadTimeoutTask(ctx), readTimeout, TimeUnit.MILLISECONDS);
    }// w  ww .ja  va 2s. c  o m
}

From source file:com.phei.netty.protocol.netty.client.HeartBeatReqHandler.java

License:Apache License

@Override
public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
    NettyMessage message = (NettyMessage) msg;
    // ?????//from   w  ww .  j  av a  2s  .  c  o  m
    if (message.getHeader() != null && message.getHeader().getType() == MessageType.LOGIN_RESP.value()) {
        //5???
        heartBeat = ctx.executor().scheduleAtFixedRate(new HeartBeatReqHandler.HeartBeatTask(ctx), 0, 5000,
                TimeUnit.MILLISECONDS);
    } else if (message.getHeader() != null
            && message.getHeader().getType() == MessageType.HEARTBEAT_RESP.value()) {
        System.out.println("Client receive server heart beat message : ---> " + message);
    } else {
        ctx.fireChannelRead(msg);
    }
}

From source file:com.siondream.superjumper.net.SecureChatServerHandler.java

License:Apache License

ScheduledFuture<?> schedule(ChannelHandlerContext ctx, Runnable task, long delay, TimeUnit unit) {
    return ctx.executor().schedule(task, delay, unit);
}

From source file:com.spotify.netty.handler.queue.AutoFlushingWriteBatcher.java

License:Apache License

/**
 * Called when the channel is opened./*from   w  w w.  j a v  a  2s.c  om*/
 */
@Override
public void connect(final ChannelHandlerContext ctx, SocketAddress remote, SocketAddress local,
        ChannelPromise promise) throws Exception {
    // Schedule a task to flush and enforce the maximum latency that a message is buffered
    flushFuture = ctx.executor().scheduleAtFixedRate(new Runnable() {
        @Override
        public void run() {
            final long nanosSinceLastFlush = System.nanoTime() - lastFlush;
            if (nanosSinceLastFlush > maxDelayNanos) {
                ctx.flush();
                bufferSize.set(0);
                lastFlush = System.nanoTime();
            }
        }
    }, intervalNanos, intervalNanos, NANOSECONDS);

    ctx.connect(remote, local, promise);
}

From source file:com.tesora.dve.server.connectionmanager.loaddata.MSPLoadDataDecoder.java

License:Open Source License

private void clientThreadInsertSuccess(final ChannelHandlerContext ctx) {

    ctx.executor().submit(new Callable<Void>() {
        @Override//from www  . j  a  v  a  2 s. c  o  m
        public Void call() throws Exception {
            insertSuccess(ctx);
            return null;
        }
    });
}

From source file:com.tesora.dve.server.connectionmanager.loaddata.MSPLoadDataDecoder.java

License:Open Source License

private void clientThreadInsertFailure(final ChannelHandlerContext ctx, final Throwable e) {
    ctx.executor().submit(new Callable<Void>() {
        @Override/* ww w.j a v a2  s. c  o m*/
        public Void call() throws Exception {
            insertFailure(ctx, e);
            return null;
        }
    });

}