Example usage for java.net DatagramSocket DatagramSocket

Introduction

In this page you can find the example usage for java.net DatagramSocket DatagramSocket.

Prototype

public DatagramSocket(int port) throws SocketException

Source Link

Document

Constructs a datagram socket and binds it to the specified port on the local host machine.

Usage

From source file:net.spfbl.dns.QueryDNS.java

/**
 * Configurao e intanciamento do servidor.
 * @throws java.net.SocketException se houver falha durante o bind.
 */// www . jav  a2  s .  com
public QueryDNS(int port) throws SocketException {
    super("SERVERDNS");
    setPriority(Thread.NORM_PRIORITY);
    // Criando conexes.
    Server.logDebug("binding DNS socket on port " + port + "...");
    PORT = port;
    SERVER_SOCKET = new DatagramSocket(port);
    Server.logTrace(getName() + " thread allocation.");
}

From source file:org.kawanfw.sql.tomcat.TomcatStarterUtil.java

/**
 * Checks to see if a specific port is available.
 * // w  ww . j  a v a2  s. c om
 * @param port
 *            the port to check for availability
 */
public static boolean available(int port) {

    ServerSocket ss = null;
    DatagramSocket ds = null;
    try {
        ss = new ServerSocket(port);
        ss.setReuseAddress(true);
        ds = new DatagramSocket(port);
        ds.setReuseAddress(true);
        return true;
    } catch (IOException e) {
        // e.printStackTrace();
    } finally {
        if (ds != null) {
            ds.close();
        }

        if (ss != null) {
            try {
                ss.close();
            } catch (IOException e) {
                /* should not be thrown */
            }
        }
    }

    return false;
}

From source file:acoli.controller.Controller.java

/**
 * http://stackoverflow.com/questions/434718/sockets-discover-port-availability-using-java
 * Checks to see if a specific port is available.
 *
 * @param port the port to check for availability
 *///from ww w  .j a va 2  s .  c  o  m
public static boolean portAvailable(int port) {
    int MIN_PORT_NUMBER = 1000;
    int MAX_PORT_NUMBER = 9999;
    if (port < MIN_PORT_NUMBER || port > MAX_PORT_NUMBER) {
        throw new IllegalArgumentException("Invalid start port: " + port);
    }

    ServerSocket ss = null;
    DatagramSocket ds = null;
    try {
        ss = new ServerSocket(port);
        ss.setReuseAddress(true);
        ds = new DatagramSocket(port);
        ds.setReuseAddress(true);
        return true;
    } catch (IOException e) {
    } finally {
        if (ds != null) {
            ds.close();
        }

        if (ss != null) {
            try {
                ss.close();
            } catch (IOException e) {
                /* should not be thrown */
            }
        }
    }
    return false;
}

From source file:com.ejisto.util.IOUtils.java

private static boolean isPortAvailable(int port) {
    try (DatagramSocket udp = new DatagramSocket(port); ServerSocket tcp = new ServerSocket(port)) {
        tcp.setReuseAddress(true);//from  w  ww.ja va 2 s  .  co m
        udp.setReuseAddress(true);
        return true;
    } catch (IOException ex) {
        return false;
    }
}

From source file:org.wso2.carbon.analytics.common.jmx.agent.JmxAgentWebInterface.java

/**
 * Test the availability of the DataPublisher by
 * trying to connect to it (credentials are not checked)
 *
 * @return : whether the test was successful or not
 *///from   w w w . j a  v  a2 s .  c o m
public boolean testDataPublisherAvailability(String connectionType, String url, int port) {

    //check for tcp and ssl port availability
    if (connectionType.equalsIgnoreCase("tcp://") || connectionType.equalsIgnoreCase("ssl://")) {

        DatagramSocket ds = null;

        try {
            ds = new DatagramSocket(port);
            ds.setReuseAddress(true);

            return true;
        } catch (IOException e) {
            log.error(e);
        } finally {
            if (ds != null) {
                ds.close();
            }
        }
    }

    //check for http and https port availability
    if (connectionType.equalsIgnoreCase("http://") || connectionType.equalsIgnoreCase("https://")) {

        Socket socket = null;

        try {
            socket = new Socket();
            socket.setReuseAddress(true);

            SocketAddress sa = new InetSocketAddress(url, port);
            socket.connect(sa);
            return true;
        } catch (IOException e) {
            log.error(e);
        } finally {
            if (socket != null) {
                try {
                    socket.close();
                } catch (IOException e) {
                    //do nothing
                }
            }
        }
    }

    return false;
}

From source file:org.marketcetera.saclient.rpc.RpcSAClientImplTest.java

/**
 * Assigns a port value that is not in use.
 * /*from w ww .ja  v a 2 s. c  o  m*/
 * @return an <code>int</code> value
 */
private int assignPort() {
    for (int i = MIN_PORT_NUMBER; i <= MAX_PORT_NUMBER; i++) {
        try (ServerSocket ss = new ServerSocket(i)) {
            ss.setReuseAddress(true);
            try (DatagramSocket ds = new DatagramSocket(i)) {
                ds.setReuseAddress(true);
                return i;
            }
        } catch (IOException e) {
        }
    }
    throw new IllegalArgumentException("No available ports");
}

From source file:org.eclipse.scanning.test.scan.nexus.MandelbrotRemoteTest.java

/**
 * Checks if a port is free.//from  ww  w.  j  av  a 2  s.c om
 * @param port
 * @return
 */
public static boolean isPortFree(int port) {

    ServerSocket ss = null;
    DatagramSocket ds = null;
    try {
        ss = new ServerSocket(port);
        ss.setReuseAddress(true);
        ds = new DatagramSocket(port);
        ds.setReuseAddress(true);
        return true;
    } catch (IOException e) {
        // Swallow this, it's not free
        return false;
    } finally {
        if (ds != null) {
            ds.close();
        }

        if (ss != null) {
            try {
                ss.close();
            } catch (IOException e) {
                /* should not be thrown */
            }
        }
    }

}

From source file:org.openhab.binding.modbus.internal.TestCaseSupport.java

private void startUDPServer() throws UnknownHostException, InterruptedException {
    udpListener = new ModbusUDPListener(localAddress(), udpTerminalFactory);
    for (int portCandidate = 10000 + udpServerIndex.increment(); portCandidate < 20000; portCandidate++) {
        try {//from w w w.ja  v  a  2 s. com
            DatagramSocket socket = new DatagramSocket(portCandidate);
            socket.close();
            udpListener.setPort(portCandidate);
            break;
        } catch (SocketException e) {
            continue;
        }
    }

    udpListener.start();
    waitForUDPServerStartup();
    Assert.assertNotSame(-1, udpModbusPort);
    Assert.assertNotSame(0, udpModbusPort);
}

From source file:Reflector.java

private DatagramSocket initUnicastSocket() {
    // initialize a DatagramSocket

    DatagramSocket ds;/*from   w  w  w .j a v a 2  s  .  c  o m*/
    try {
        ds = new DatagramSocket(sendPort);
    } catch (Exception e) {
        e.printStackTrace();
        return (null);
    }
    return (ds);
}

From source file:Reflector.java

private DatagramSocket initUnicastSocket() {
    // initialize a DatagramSocket

    DatagramSocket ds;//from w  w  w.  ja  v  a 2  s .c  o  m
    try {
        ds = new DatagramSocket(listenPort);
    } catch (Exception e) {
        System.err.println("Failed to create DatagramSocket on " + "port " + listenPort);
        return (null);
    }
    return (ds);
}