Examples with UnknownHostException java.net.UnknownHostException used on opensource projects

Example 46 with UnknownHostException

use of java.net.UnknownHostException in project openhab1-addons by openhab.

the class TCPConnector method open.

/**
     * {@inheritDoc}
     **/
public void open() {
    try {
        tcpSocket = new Socket();
        SocketAddress TPIsocketAddress = new InetSocketAddress(ipAddress, tcpPort);
        tcpSocket.connect(TPIsocketAddress, connectTimeout);
        tcpOutput = new OutputStreamWriter(tcpSocket.getOutputStream(), "US-ASCII");
        tcpInput = new BufferedReader(new InputStreamReader(tcpSocket.getInputStream()));
        connected = true;
        // Start the TCP Listener
        TCPListener = new TCPListener();
        TCPListener.start();
    } catch (UnknownHostException exception) {
        logger.error("open(): Unknown Host Exception: ", exception);
        connected = false;
    } catch (SocketException socketException) {
        logger.error("open(): Socket Exception: ", socketException);
        connected = false;
    } catch (IOException ioException) {
        logger.error("open(): IO Exception: ", ioException);
        connected = false;
    } catch (Exception exception) {
        logger.error("open(): Exception: ", exception);
        connected = false;
    }
}

Example 47 with UnknownHostException

use of java.net.UnknownHostException in project logger by orhanobut.

the class Helper method getStackTraceString.

/**
   * Copied from "android.util.Log.getStackTraceString()" in order to avoid usage of Android stack
   * in unit tests.
   *
   * @return Stack trace in form of String
   */
static String getStackTraceString(Throwable tr) {
    if (tr == null) {
        return "";
    }
    // This is to reduce the amount of log spew that apps do in the non-error
    // condition of the network being unavailable.
    Throwable t = tr;
    while (t != null) {
        if (t instanceof UnknownHostException) {
            return "";
        }
        t = t.getCause();
    }
    StringWriter sw = new StringWriter();
    PrintWriter pw = new PrintWriter(sw);
    tr.printStackTrace(pw);
    pw.flush();
    return sw.toString();
}

Example 48 with UnknownHostException

use of java.net.UnknownHostException in project openhab1-addons by openhab.

the class BenqProjectorNetworkTransport method networkConnect.

private boolean networkConnect() {
    logger.debug("Running connection setup");
    try {
        logger.debug("Setting up socket connection to " + this.networkHost + ":" + this.networkPort);
        this.projectorSocket = new Socket(this.networkHost, this.networkPort);
        this.projectorSocket.setSoTimeout(SOCKET_TIMEOUT_MS);
        logger.debug("Setup reader/writer");
        this.projectorReader = new BufferedReader(new InputStreamReader(this.projectorSocket.getInputStream()));
        this.projectorWriter = new PrintWriter(this.projectorSocket.getOutputStream(), true);
        logger.debug("Network connection setup successfully!");
        return true;
    } catch (UnknownHostException e) {
        logger.error("Unable to find host: " + this.networkHost);
    } catch (IOException e) {
        logger.error("IO Exception: " + e.getMessage());
    }
    return false;
}

Example 49 with UnknownHostException

use of java.net.UnknownHostException in project openhab1-addons by openhab.

the class AlarmDecoderBinding method connect.

private synchronized void connect() {
    try {
        // make sure we have disconnected
        disconnect();
        markAllItemsUnupdated();
        if (m_tcpHostName != null && m_tcpPort > 0) {
            m_socket = new Socket(m_tcpHostName, m_tcpPort);
            m_reader = new BufferedReader(new InputStreamReader(m_socket.getInputStream()));
            m_writer = new BufferedWriter(new OutputStreamWriter(m_socket.getOutputStream()));
            logger.info("connected to {}:{}", m_tcpHostName, m_tcpPort);
            startMsgReader();
        } else if (this.m_serialDeviceName != null) {
            /*
                 * by default, RXTX searches only devices /dev/ttyS* and
                 * /dev/ttyUSB*, and will so not find symlinks. The
                 * setProperty() call below helps
                 */
            updateSerialProperties(m_serialDeviceName);
            CommPortIdentifier ci = CommPortIdentifier.getPortIdentifier(m_serialDeviceName);
            CommPort cp = ci.open("openhabalarmdecoder", 10000);
            if (cp == null) {
                throw new IllegalStateException("cannot open serial port!");
            }
            if (cp instanceof SerialPort) {
                m_port = (SerialPort) cp;
            } else {
                throw new IllegalStateException("unknown port type");
            }
            m_port.setSerialPortParams(m_portSpeed, SerialPort.DATABITS_8, SerialPort.STOPBITS_1, SerialPort.PARITY_NONE);
            m_port.setFlowControlMode(SerialPort.FLOWCONTROL_RTSCTS_IN | SerialPort.FLOWCONTROL_RTSCTS_OUT);
            m_port.disableReceiveFraming();
            m_port.disableReceiveThreshold();
            m_reader = new BufferedReader(new InputStreamReader(m_port.getInputStream()));
            m_writer = new BufferedWriter(new OutputStreamWriter(m_port.getOutputStream()));
            logger.info("connected to serial port: {}", m_serialDeviceName);
            startMsgReader();
        } else {
            logger.warn("alarmdecoder hostname or port not configured!");
        }
    } catch (PortInUseException e) {
        logger.error("cannot open serial port: {}, it is in use!", m_serialDeviceName);
    } catch (UnsupportedCommOperationException e) {
        logger.error("got unsupported operation {} on port {}", e.getMessage(), m_serialDeviceName);
    } catch (NoSuchPortException e) {
        logger.error("got no such port for {}", m_serialDeviceName);
    } catch (IllegalStateException e) {
        logger.error("got unknown port type for {}", m_serialDeviceName);
    } catch (UnknownHostException e) {
        logger.error("unknown host name :{}: ", m_tcpHostName, e);
    } catch (IOException e) {
        logger.error("cannot open connection to {}", m_connectString);
    }
}

Example 50 with UnknownHostException

use of java.net.UnknownHostException in project openhab1-addons by openhab.

the class AnelUDPConnector method sendDatagram.

/**
     * Send data to the specified address via the specified UDP port.
     *
     * @param data
     *            The data to send.
     * @throws Exception
     *             If an exception occurred.
     */
void sendDatagram(byte[] data) throws Exception {
    if (data == null || data.length == 0) {
        throw new IllegalArgumentException("data must not be null or empty");
    }
    try {
        final InetAddress ipAddress = InetAddress.getByName(host);
        final DatagramPacket packet = new DatagramPacket(data, data.length, ipAddress, sendPort);
        final DatagramSocket socket = new DatagramSocket();
        socket.send(packet);
        socket.close();
    } catch (SocketException e) {
        throw new Exception(e);
    } catch (UnknownHostException e) {
        throw new Exception("Could not resolve host: " + host, e);
    } catch (IOException e) {
        throw new Exception(e);
    }
}