Example usage for java.nio.channels SocketChannel isConnected

List of usage examples for java.nio.channels SocketChannel isConnected

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Introduction

In this page you can find the example usage for java.nio.channels SocketChannel isConnected.

Prototype

public abstract boolean isConnected();

Source Link

Document

Tells whether or not this channel's network socket is connected.

Usage

From source file:Main.java

public static void blockUntilConnected(final SocketChannel channel, long timeout) throws IOException {
    ThreadPoolExecutor executor = new ThreadPoolExecutor(1, 1, timeout, TimeUnit.MILLISECONDS,
            new LinkedBlockingQueue<Runnable>());
    FutureTask<Boolean> future = new FutureTask<Boolean>(new Callable<Boolean>() {
        public Boolean call() {
            while (!channel.isConnected()) {
                try {
                    Thread.sleep(300);
                } catch (InterruptedException e) {
                }//from  w  w w.j  av  a  2  s .c o  m
            }
            return true;
        }
    });
    executor.execute(future);

    try {
        future.get(timeout, TimeUnit.MILLISECONDS);
    } catch (Exception e) {
        channel.close();
        throw new IOException(e);
    }
}

From source file:org.reunionemu.jreunion.server.Network.java

public void disconnect(SocketChannel socketChannel) {

    if (socketChannel.isConnected() && socketChannel.isOpen()) {
        processOutput(socketChannel);//ww w . j  av a  2s .c  om
    }
    LoggerFactory.getLogger(Network.class)
            .info("Disconnecting {local=" + socketChannel.socket().getLocalSocketAddress() + " remote="
                    + socketChannel.socket().getRemoteSocketAddress() + "}\n");
    fireEvent(NetworkDisconnectEvent.class, socketChannel);

    try {
        socketChannel.close();
    } catch (IOException e) {
        LoggerFactory.getLogger(this.getClass()).warn("Exception", e);
    }
}

From source file:org.reunionemu.jreunion.server.Network.java

private boolean processOutput(SocketChannel socketChannel) {

    Client client = Server.getInstance().getWorld().getClients().get(socketChannel);

    if (client == null)
        return false;

    if (!socketChannel.isOpen() || !socketChannel.isConnected()) {
        disconnect(socketChannel);/*from   w  ww  .j ava  2s .c o m*/
        return false;
    }
    buffer.clear();
    byte[] packetBytes = client.flush();
    if (packetBytes == null)
        return true;
    buffer.put(packetBytes);
    buffer.flip();

    try {
        socketChannel.write(buffer);
    } catch (IOException e) {
        LoggerFactory.getLogger(this.getClass()).error("Exception", e);
        disconnect(socketChannel);
        return false;
    }
    return true;
}

From source file:org.sonews.daemon.sync.SynchronousNNTPDaemon.java

@Override
public void run() {
    try {//  w  ww .  j  a va2s  .  c om
        Log.get().log(Level.INFO, "Server listening on port {0}", port);

        // Create a Selector that handles the SocketChannel multiplexing
        final Selector readSelector = Selector.open();
        final Selector writeSelector = Selector.open();

        // Start working threads
        final int workerThreads = Math.max(4, 2 * Runtime.getRuntime().availableProcessors());
        ConnectionWorker[] cworkers = new ConnectionWorker[workerThreads];
        for (int n = 0; n < workerThreads; n++) {
            cworkers[n] = new ConnectionWorker();
            cworkers[n].start();
        }
        Log.get().log(Level.INFO, "{0} worker threads started.", workerThreads);

        ChannelWriter.getInstance().setSelector(writeSelector);
        ChannelReader.getInstance().setSelector(readSelector);
        ChannelWriter.getInstance().start();
        ChannelReader.getInstance().start();

        final ServerSocketChannel serverSocketChannel = ServerSocketChannel.open();
        serverSocketChannel.configureBlocking(true); // Set to blocking mode

        // Configure ServerSocket; bind to socket...
        serverSocket = serverSocketChannel.socket();
        serverSocket.bind(new InetSocketAddress(this.port));

        while (isRunning()) {
            SocketChannel socketChannel;

            try {
                // As we set the server socket channel to blocking mode the
                // accept()
                // method will block.
                socketChannel = serverSocketChannel.accept();
                socketChannel.configureBlocking(false);
                assert socketChannel.isConnected();
                assert socketChannel.finishConnect();
            } catch (IOException ex) {
                // Under heavy load an IOException "Too many open files may
                // be thrown. It most cases we should slow down the
                // connection accepting, to give the worker threads some
                // time to process work.
                Log.get().log(Level.SEVERE, "IOException while accepting connection: {0}", ex.getMessage());
                Log.get().info("Connection accepting sleeping for seconds...");
                Thread.sleep(5000); // 5 seconds
                continue;
            }

            //FIXME conn should be NNTPConnection
            final SynchronousNNTPConnection conn = (SynchronousNNTPConnection) context
                    .getBean("syncNNTPConnection", NNTPConnection.class);
            conn.setChannelWrapper(new SocketChannelWrapperFactory(socketChannel).create());
            Connections.getInstance().add(conn);

            try {
                SelectionKey selKeyWrite = registerSelector(writeSelector, socketChannel,
                        SelectionKey.OP_WRITE);
                registerSelector(readSelector, socketChannel, SelectionKey.OP_READ);

                Log.get().log(Level.INFO, "Connected: {0}", socketChannel.socket().getRemoteSocketAddress());

                // Set write selection key and send hello to client
                conn.setWriteSelectionKey(selKeyWrite);
                conn.println("200 " + Config.inst().get(Config.HOSTNAME, "localhost") + " <unknown version>" // + Application.VERSION
                        + " news server ready - (posting ok).");
            } catch (CancelledKeyException cke) {
                Log.get().log(Level.WARNING, "CancelledKeyException {0} was thrown: {1}",
                        new Object[] { cke.getMessage(), socketChannel.socket() });
            } catch (ClosedChannelException cce) {
                Log.get().log(Level.WARNING, "ClosedChannelException {0} was thrown: {1}",
                        new Object[] { cce.getMessage(), socketChannel.socket() });
            }
        }
    } catch (BindException ex) {
        // Could not bind to socket; this is a fatal, so perform a shutdown
        Log.get().log(Level.SEVERE, ex.getLocalizedMessage() + " -> shutdown sonews", ex);
        setRunning(false);
    } catch (IOException ex) {
        ex.printStackTrace();
    } catch (Exception ex) {
        ex.printStackTrace();
    }
}

From source file:com.bittorrent.mpetazzoni.client.ConnectionHandler.java

/**
 * Return a human-readable representation of a connected socket channel.
 *
 * @param channel The socket channel to represent.
 * @return A textual representation (<em>host:port</em>) of the given
 * socket.//from ww  w.  j  ava2s  .  c o m
 */
private String socketRepr(SocketChannel channel) {
    Socket s = channel.socket();
    return String.format("%s:%d%s", s.getInetAddress().getHostName(), s.getPort(),
            channel.isConnected() ? "+" : "-");
}

From source file:morphy.service.SocketConnectionService.java

protected void disposeSocketChannel(SocketChannel channel) {
    if (channel.isConnected()) {
        try {/*from w  w w  . j a v  a 2 s.  c  o  m*/
            channel.close();
        } catch (Throwable t) {
        }
    }
    socketToSession.remove(channel.socket());
}

From source file:edu.hawaii.soest.pacioos.text.SocketTextSource.java

/**
* A method used to the TCP socket of the remote source host for communication
* @param host       the name or IP address of the host to connect to for the
*                   socket connection (reading)
* @param portNumber the number of the TCP port to connect to (i.e. 2604)
*//*from  w w w .  j a  v  a  2s.c o m*/
protected SocketChannel getSocketConnection() {

    String host = getHostName();
    int portNumber = new Integer(getHostPort()).intValue();
    SocketChannel dataSocket = null;

    try {

        // create the socket channel connection to the data source via the 
        // converter serial2IP converter      
        dataSocket = SocketChannel.open();
        dataSocket.connect(new InetSocketAddress(host, portNumber));

        // if the connection to the source fails, also disconnect from the RBNB
        // server and return null
        if (!dataSocket.isConnected()) {
            dataSocket.close();
            disconnect();
            dataSocket = null;
        }
    } catch (UnknownHostException ukhe) {

        log.info("Unable to look up host: " + host + "\n");
        disconnect();
        dataSocket = null;
    } catch (IOException nioe) {
        log.info("Couldn't get I/O connection to: " + host + ":" + portNumber);
        disconnect();
        dataSocket = null;
    }
    return dataSocket;

}

From source file:morphy.service.SocketConnectionService.java

private synchronized void onNewInput(SocketChannel channel) {
    if (!channel.isOpen())
        return;/*from w w  w .  j a v a2  s  .  com*/

    try {
        if (channel.isConnected()) {
            SocketChannelUserSession session = socketToSession.get(channel.socket());

            if (session == null) {
                if (LOG.isErrorEnabled()) {
                    LOG.error("Received a read on a socket not being managed. This is likely a bug.");
                }

                disposeSocketChannel(channel);
            } else {
                synchronized (session.getInputBuffer()) {
                    String message = readMessage(channel);
                    if (message != null && message.equals(MSG_TIMESEAL_OK)) {
                        // Don't need to do anything. This was just the timeseal init string.
                    } else if (message == null && channel.isOpen()) {
                        session.disconnect();
                    } else if (message == null) {
                        session.disconnect();
                    } else if (message.length() > 0) {
                        /*if (!socketInputForCmd.containsKey(channel.socket())) {
                           socketInputForCmd.put(channel.socket(), new StringBuilder());
                        }
                        int c = (int)message.charAt(0);
                        if (c != 10 && c != 13) {
                           socketInputForCmd.get(channel.socket()).append(message);
                           //LOG.info(c);
                        } else {
                           message = socketInputForCmd.get(channel.socket()).toString();
                           socketInputForCmd.put(channel.socket(), new StringBuilder()); 
                           LOG.info("Read: "
                                 + session.getUser().getUserName() + " \""
                                 + message + "\"");
                        }
                        LOG.info(c + " " + socketInputForCmd.get(channel.socket()));*/

                        boolean expandAliases = true;
                        if (message.startsWith("$$")) {
                            message = message.substring(2);
                            expandAliases = false;
                        } else {
                            session.touchLastReceivedTime();
                            session.getUser().getUserVars().getVariables().put("busy", "");
                            expandAliases = true;
                        }

                        session.getInputBuffer().append(message);
                        if (session.getInputBuffer().indexOf("\n") != -1) {
                            LOG.info("Read: " + session.getUser().getUserName() + " \"" + message + "\"");
                        }
                        int carrageReturnIndex = -1;
                        while ((carrageReturnIndex = session.getInputBuffer().indexOf("\n")) != -1) {

                            String command = session.getInputBuffer().substring(0, carrageReturnIndex).trim();
                            session.getInputBuffer().delete(0, carrageReturnIndex + 1);

                            if (session
                                    .getCurrentState() == SocketChannelUserSession.UserSessionState.LOGIN_NEED_PASSWORD) {
                                handlePasswordPromptText(session, command);
                            } else if (command.equals("") || command.equals("\n") || command.equals("\n\r")) {
                                session.send("");
                            } else if (session
                                    .getCurrentState() == SocketChannelUserSession.UserSessionState.LOGIN_NEED_USERNAME) {
                                handleLoginPromptText(session, command);
                            } else {
                                if (expandAliases) {
                                    CommandService.getInstance().processCommandAndCheckAliases(command,
                                            session);
                                } else {
                                    CommandService.getInstance().processCommand(command, session);
                                }
                            }
                        }
                    }
                }
            }
        }
    } catch (Throwable t) {
        if (LOG.isErrorEnabled()) {
            LOG.error("Error reading socket channel or processing command ", t);
        }

    }
}

From source file:hornet.framework.clamav.service.ClamAVCheckService.java

/**
 * Ouverture de la socket./*from  w  w w . j a  va 2  s  .c o  m*/
 *
 * @return la socket
 * @throws ClamAVException
 *             the clam av exception
 */
private SocketChannel openSocket() throws ClamAVException {

    SocketChannel channel = null;
    try {
        // Rcuperation de la socket depuis le pool
        channel = this.socketPool.borrowObject();

        if (!channel.isOpen()) {
            channel = SocketChannel.open();
        }
        if (!channel.isConnected()) {
            channel.configureBlocking(true);
            channel.connect(new InetSocketAddress(this.clamAVServer, this.clamAVPort));
        }
    } catch (final Exception e) {
        ClamAVCheckService.LOGGER.error("Unable to borrow socket from pool", e);
        throw new ClamAVException(ERR_TEC_CLAMAV_01, new String[] { e.getMessage() }, e);
    }

    return channel;
}

From source file:edu.hawaii.soest.kilonalu.ctd.SBE37Source.java

/**
* A method used to the TCP socket of the remote source host for communication
* @param host       the name or IP address of the host to connect to for the
*                   socket connection (reading)
* @param portNumber the number of the TCP port to connect to (i.e. 2604)
*//* w  ww.  ja  v  a  2s .  com*/
protected SocketChannel getSocketConnection() {

    String host = getHostName();
    int portNumber = new Integer(getHostPort()).intValue();
    SocketChannel dataSocket = null;

    try {

        // create the socket channel connection to the data source via the 
        // converter serial2IP converter      
        dataSocket = SocketChannel.open();
        //dataSocket.configureBlocking(false);
        dataSocket.connect(new InetSocketAddress(host, portNumber));

        // if the connection to the source fails, also disconnect from the RBNB
        // server and return null
        if (!dataSocket.isConnected()) {
            dataSocket.close();
            disconnect();
            dataSocket = null;
        }
    } catch (UnknownHostException ukhe) {
        System.err.println("Unable to look up host: " + host + "\n");
        disconnect();
        dataSocket = null;
    } catch (IOException nioe) {
        System.err.println("Couldn't get I/O connection to: " + host);
        disconnect();
        dataSocket = null;
    } catch (Exception e) {
        disconnect();
        dataSocket = null;
    }
    return dataSocket;

}