Examples of DatagramSocket

io.vertx.core.datagram.DatagramSocket
A Datagram socket which can be used to send {@link DatagramPacket}'s to remote Datagram servers and receive {@link DatagramPacket}s . Usually you use a Datragram Client to send UDP over the wire. UDP is connection-less which means you are not connected to the remote peer in a persistent way. Because of this you have to supply the address and port of the remote peer when sending data. You can send data to ipv4 or ipv6 addresses, which also include multicast addresses. @author Norman Maurer
java.net.DatagramSocket
This class represents a socket for sending and receiving datagram packets.
A datagram socket is the sending or receiving point for a packet delivery service. Each packet sent or received on a datagram socket is individually addressed and routed. Multiple packets sent from one machine to another may be routed differently, and may arrive in any order.
UDP broadcasts sends are always enabled on a DatagramSocket. In order to receive broadcast packets a DatagramSocket should be bound to the wildcard address. In some implementations, broadcast packets may also be received when a DatagramSocket is bound to a more specific address.
Example: DatagramSocket s = new DatagramSocket(null); s.bind(new InetSocketAddress(8888)); Which is equivalent to: DatagramSocket s = new DatagramSocket(8888); Both cases will create a DatagramSocket able to receive broadcasts on UDP port 8888. @author Pavani Diwanji @version 1.101, 06/08/06 @see java.net.DatagramPacket @see java.nio.channels.DatagramChannel @since JDK1.0

Examples of java.net.DatagramSocket

        }
    }


    private void sendPacket(DatagramPacket datagramPacket) {


        DatagramSocket datagramSocket = getDatagramSocket();


        try {


            datagramSocket.send(datagramPacket);


        } catch (IOException ex) {


            throw new RuntimeException(ex);


        } finally {


            datagramSocket.close();
        }
    }

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Examples of java.net.DatagramSocket


    private DatagramSocket getDatagramSocket() {


        try {


            return new DatagramSocket();


        } catch (SocketException ex) {


            throw new RuntimeException(ex);
        }

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Examples of java.net.DatagramSocket

    public void start() {
        this.serverThread.start();
    }


    public static TestServer build() throws SocketException {
        return new TestServer(new ServerThread(new DatagramSocket(12201)));
    }

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Examples of java.net.DatagramSocket

        if( so.getProtocol().equals( OSCChannel.TCP )) {
          final ServerSocket ss = new ServerSocket( 0 );
          serverPort = ss.getLocalPort();
          ss.close();
        } else if( so.getProtocol().equals( OSCChannel.UDP )) {
          final DatagramSocket ds = new DatagramSocket();
          serverPort = ds.getLocalPort();
          ds.close();
        } else {
          throw new IllegalArgumentException( "Illegal protocol : " + so.getProtocol() );
        }
      }

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Examples of java.net.DatagramSocket


      public void openBroadcaster() throws Exception
      {
         if (localBindPort != -1)
         {
            broadcastingSocket = new DatagramSocket(localBindPort, localAddress);
         }
         else
         {
            if (localAddress != null)
            {
               HornetQClientLogger.LOGGER.broadcastGroupBindError();
            }
            broadcastingSocket = new DatagramSocket();
         }


         open = true;
      }

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Examples of java.net.DatagramSocket

   * @param host Hostname or IP adress
   * @param port number
   * @throws SocketException if Socket can't be opened
   */
  public Client(String host, int port) throws SocketException {
    this.socket = new DatagramSocket(port);
    this.server = new InetSocketAddress(host, 1234);
  }

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Examples of java.net.DatagramSocket

  }
  
  public void startServer() {
    try {
      ExecutorService exec = Executors.newFixedThreadPool(100);
      this.socket = new DatagramSocket(SERVER_PORT);
      while (true) {
        byte[] buf = new byte[256];
        DatagramPacket dp = new DatagramPacket(buf, buf.length);
        this.socket.receive(dp);
        //FIXME feature : add a queue.

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Examples of java.net.DatagramSocket


    static int senseMaxFragSize() {
        int upper=4096;
        int lower=0;
        int highest_failed=-1;
        DatagramSocket sock;
        byte[] buf;
        DatagramPacket packet;
        InetAddress local_addr;
        final int num_iterations=15;


        try {
            sock=new DatagramSocket();
            local_addr=InetAddress.getLocalHost();
        }
        catch(Exception ex) {
            System.err.println("failed creating DatagramSocket: " + ex);
            return lower;
        }


        for(int i=0; i < num_iterations && lower < upper; i++) { // iterations to approximate frag_size
            try {
                buf=new byte[upper];
                // System.out.println("** upper=" + upper + " (lower=" + lower + ")");
                packet=new DatagramPacket(buf, buf.length, local_addr, 9);
                sock.send(packet);
                lower=Math.max(lower, upper);
                System.out.println("-- trying " + lower + " [OK]");
                upper=upper * 2;
                if(highest_failed > -1)
                    upper=Math.min(highest_failed, upper);

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Examples of java.net.DatagramSocket

        return lower;
    }




    public static void main(String[] args) {
        DatagramSocket sock;
        DatagramPacket packet;
        int size=0, frag_size=0;
        byte[] buf;


        try {
            size=senseMaxFragSize();
            System.out.println("-- fine tuning (starting at " + size + "):");
            sock=new DatagramSocket();
            for(; ;) {
                buf=new byte[size];
                packet=new DatagramPacket(buf, buf.length, InetAddress.getLocalHost(), 9);
                sock.send(packet);
                // System.out.print(size + " ");
                // System.out.println(size + " [OK]");
                frag_size=size;
                size++;
            }

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Examples of java.net.DatagramSocket

    static long start, stop;
    private static final String LOOPBACK="LOOPBACK(down_thread=false;up_thread=false)";




    public static void main(String[] args) {
        DatagramSocket sock=null;
        Receiver receiver;
        int num_msgs=1000, num_sent=0, group_port=7500, num_yields=0;
        DatagramPacket packet;
        InetAddress group_addr=null;
        int[][] matrix;
        boolean jg=false; // use JGroups channel instead of UDP MulticastSocket
        JChannel channel=null;
        String group_name="SpeedTest-Group";
        Message send_msg;
        boolean debug=false, cummulative=false, busy_sleep=false, yield=false, loopback=false;
        Debugger debugger=null;
        long sleep_time=1; // sleep in msecs between msg sends
        ExposedByteArrayOutputStream output=new ExposedByteArrayOutputStream(64);
        String props;




        props="UDP(mcast_addr=224.0.0.36;mcast_port=55566;ip_ttl=32;" +
                "ucast_send_buf_size=32000;ucast_recv_buf_size=64000;" +
                "mcast_send_buf_size=32000;mcast_recv_buf_size=64000):" +
                "PING(timeout=2000;num_initial_members=3):" +
                "MERGE2(min_interval=5000;max_interval=10000):" +
                "FD_SOCK:" +
                "VERIFY_SUSPECT(timeout=1500):" +
                "pbcast.NAKACK(max_xmit_size=8192;gc_lag=50;retransmit_timeout=600,800,1200,2400,4800):" +
                "UNICAST(timeout=1200):" +
                "pbcast.STABLE(desired_avg_gossip=10000):" +
                "FRAG(frag_size=8192;down_thread=false;up_thread=false):" +
                "pbcast.GMS(join_timeout=5000;join_retry_timeout=2000;" +
                "shun=false;print_local_addr=true):" +
                "pbcast.STATE_TRANSFER";
                //  "PERF(details=true)";






        for(int i=0; i < args.length; i++) {
            if("-help".equals(args[i])) {
                help();
                return;
            }
            if("-jg".equals(args[i])) {
                jg=true;
                continue;
            }
            if("-loopback".equals(args[i])) {
                loopback=true;
                continue;
            }
            if("-props".equals(args[i])) {
                props=args[++i];
                continue;
            }
            if("-debug".equals(args[i])) {
                debug=true;
                continue;
            }
            if("-cummulative".equals(args[i])) {
                cummulative=true;
                continue;
            }
            if("-busy_sleep".equals(args[i])) {
                busy_sleep=true;
                continue;
            }
            if("-yield".equals(args[i])) {
                yield=true;
                num_yields++;
                continue;
            }
            if("-sleep".equals(args[i])) {
                sleep_time=Long.parseLong(args[++i]);
                continue;
            }
            if("-num_msgs".equals(args[i])) {
                num_msgs=Integer.parseInt(args[++i]);
                continue;
            }
            help();
            return;
        }


        System.out.println("jg       = " + jg +
                "\nloopback = " + loopback +
                "\ndebug    = " + debug +
                "\nsleep    = " + sleep_time +
                "\nbusy_sleep=" + busy_sleep +
                "\nyield=" + yield +
                "\nnum_yields=" + num_yields +
                "\nnum_msgs = " + num_msgs +
                           '\n');






        try {
            matrix=new int[num_msgs][2];
            for(int i=0; i < num_msgs; i++) {
                for(int j=0; j < matrix[i].length; j++)
                    matrix[i][j]=0;
            }


            if(jg) {
                if(loopback) {
                    ProtocolStackConfigurator conf=ConfiguratorFactory.getStackConfigurator(props);
                    String tmp=conf.getProtocolStackString();
                    int index=tmp.indexOf(':');
                    props=LOOPBACK + tmp.substring(index);
                }
                channel=new JChannel(props);
                // System.out.println("props:\n" + channel.getProperties());
                channel.connect(group_name);
                if(debug) {
                    debugger=new Debugger(channel, cummulative);
                    debugger.start();
                }
            }
            else {
                group_addr=InetAddress.getByName("224.0.0.36");
                sock=new DatagramSocket();
            }


            if(debug) {
                System.out.println("Press key to start");
                System.in.read();
            }
            receiver=new Receiver(group_addr, group_port, channel, matrix, jg);
            receiver.start();


            byte[] buf;
            DataOutputStream out;


            start=System.currentTimeMillis();
            for(int i=0; i < num_msgs; i++) {
                // buf=Util.objectToByteBuffer(new Integer(i));
                output.reset();
                out=new DataOutputStream(output);
                out.writeInt(i);
                out.flush();
                buf=output.getRawBuffer();
                out.close();


                if(jg) {
                    send_msg=new Message(null, null, buf, 0, buf.length);
                    channel.send(send_msg);
                }
                else {
                    packet=new DatagramPacket(buf, buf.length, group_addr, group_port);
                    sock.send(packet);
                }
                num_sent++;
                if(num_sent % 1000 == 0)
                    System.out.println("-- sent " + num_sent);

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