Example usage for java.nio.channels SocketChannel open

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

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Introduction

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

Prototype

public static SocketChannel open() throws IOException

Source Link

Document

Opens a socket channel.

Usage

From source file:edu.hawaii.soest.kilonalu.ctd.CTDSource.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 ww  . j  a v a  2 s.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) {

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

}

From source file:com.cloud.hypervisor.hyperv.resource.HypervDirectConnectResource.java

protected String connect(final String vmName, final String ipAddress, final int port) {
    final long startTick = System.currentTimeMillis();

    // wait until we have at least been waiting for _ops_timeout time or
    // at least have tried _retry times, this is to coordinate with system
    // VM patching/rebooting time that may need
    int retry = _retry;
    while (System.currentTimeMillis() - startTick <= _opsTimeout || --retry > 0) {
        s_logger.info("Trying to connect to " + ipAddress);
        try (SocketChannel sch = SocketChannel.open();) {
            sch.configureBlocking(true);
            sch.socket().setSoTimeout(5000);
            // we need to connect to the control ip address to check the status of the system vm
            final InetSocketAddress addr = new InetSocketAddress(ipAddress, port);
            sch.connect(addr);// w w  w . jav a  2  s  .  c  o m
            return null;
        } catch (final IOException e) {
            s_logger.info("Could] not connect to " + ipAddress + " due to " + e.toString());
            if (e instanceof ConnectException) {
                // if connection is refused because of VM is being started,
                // we give it more sleep time
                // to avoid running out of retry quota too quickly
                try {
                    Thread.sleep(5000);
                } catch (final InterruptedException ex) {
                    s_logger.debug(
                            "[ignored] interupted while waiting to retry connecting to vm after exception: "
                                    + e.getLocalizedMessage());
                }
            }
        }

        try {
            Thread.sleep(1000);
        } catch (final InterruptedException ex) {
            s_logger.debug("[ignored] interupted while connecting to vm.");
        }
    }

    s_logger.info("Unable to logon to " + ipAddress);

    return "Unable to connect";
}

From source file:com.cloud.hypervisor.vmware.resource.VmwareResource.java

protected String connect(final String vmName, final String ipAddress, final int port) {
    long startTick = System.currentTimeMillis();

    // wait until we have at least been waiting for _ops_timeout time or
    // at least have tried _retry times, this is to coordinate with system
    // VM patching/rebooting time that may need
    int retry = _retry;
    while (System.currentTimeMillis() - startTick <= _opsTimeout || --retry > 0) {
        s_logger.info("Trying to connect to " + ipAddress);
        try (SocketChannel sch = SocketChannel.open();) {
            sch.configureBlocking(true);
            sch.socket().setSoTimeout(5000);

            InetSocketAddress addr = new InetSocketAddress(ipAddress, port);
            sch.connect(addr);/*from   w  w w  .  j a va 2s  .  c  om*/
            return null;
        } catch (IOException e) {
            s_logger.info("Could not connect to " + ipAddress + " due to " + e.toString());
            if (e instanceof ConnectException) {
                // if connection is refused because of VM is being started,
                // we give it more sleep time
                // to avoid running out of retry quota too quickly
                try {
                    Thread.sleep(5000);
                } catch (InterruptedException ex) {
                    s_logger.debug("[ignored] interupted while waiting to retry connect after failure.", e);
                }
            }
        }

        try {
            Thread.sleep(1000);
        } catch (InterruptedException ex) {
            s_logger.debug("[ignored] interupted while waiting to retry connect.");
        }
    }

    s_logger.info("Unable to logon to " + ipAddress);

    return "Unable to connect";
}