Examples of java.net.DatagramSocket.receive()

java.net.DatagramSocket.receive()
Receives a datagram packet from this socket. When this method returns, the DatagramPacket's buffer is filled with the data received. The datagram packet also contains the sender's IP address, and the port number on the sender's machine.
This method blocks until a datagram is received. The length field of the datagram packet object contains the length of the received message. If the message is longer than the packet's length, the message is truncated.
If there is a security manager, a packet cannot be received if the security manager's checkAccept method does not allow it. @param p the DatagramPacket into which to placethe incoming data. @exception IOException if an I/O error occurs. @exception SocketTimeoutException if setSoTimeout was previously calledand the timeout has expired. @exception PortUnreachableException may be thrown if the socket is connectedto a currently unreachable destination. Note, there is no guarantee that the exception will be thrown. @exception java.nio.channels.IllegalBlockingModeException if this socket has an associated channel, and the channel is in non-blocking mode. @see java.net.DatagramPacket @see java.net.DatagramSocket @revised 1.4 @spec JSR-51

        System.out.println("Waiting for possible shutdown message on port "+UDP_PORT);
        try {
            socket = new DatagramSocket(UDP_PORT);
            DatagramPacket request = new DatagramPacket(buf, buf.length);
            while(true) {
                socket.receive(request);
                InetAddress address = request.getAddress();
                // Only accept commands from the local host
                if (address.isLoopbackAddress()){
                    String command = new String(request.getData(), request.getOffset(), request.getLength(),"ASCII");
                    System.out.println("Command: "+command+" received from "+address);

View Full Code Here

            lock.notifyAll();
          }
          socket.setSoTimeout(3000);
          DatagramPacket packet = new DatagramPacket(new byte[256],
              256);
          socket.receive(packet);
          socket.send(packet);
          socket.close();
        } catch (IOException e) {
          System.out.println("thread exception: " + e);
          if (socket != null)

View Full Code Here

        } catch (InterruptedException e) {
          fail(e.toString());
        }
      }
      socket.send(packet);
      socket.receive(packet);
      socket.close();
      assertTrue("datagram received wrong port: " + packet.getPort(),
          packet.getPort() == port);
    } catch (IOException e) {
      if (socket != null)

View Full Code Here

                DatagramPacket send = new DatagramPacket(new byte[10], 10,
                                localHost, port);
                ds.send(send);
                DatagramPacket receive = new DatagramPacket(new byte[20], 20);
                ds.setSoTimeout(2000);
                ds.receive(receive);
                ds.close();
                assertTrue("Wrong size: " + receive.getLength(), receive
                                .getLength() == 10);
                assertTrue("Wrong receiver", receive.getAddress().equals(localHost));

View Full Code Here

      ds.connect(inetAddress, portNumber);
      send = new DatagramPacket(new byte[10], 10);
      ds.send(send);
      receive = new DatagramPacket(new byte[20], 20);
      ds.setSoTimeout(10000);
      ds.receive(receive);
      ds.close();
      fail(
          "No PortUnreachableException when connected at native level on recv ");
    } catch (PortUnreachableException e) {
                    // Expected

View Full Code Here

      final DatagramSocket ds = new DatagramSocket();
      ds.setSoTimeout(12000);
      Runnable runnable = new Runnable() {
        public void run() {
          try {
            ds.receive(new DatagramPacket(new byte[1], 1));
          } catch (InterruptedIOException e) {
            interrupted = true;
          } catch (IOException e) {
          }
        }

View Full Code Here

      final DatagramSocket ds2 = new DatagramSocket(ports[1]);
      ds2.setSoTimeout(12000);
      Runnable runnable2 = new Runnable() {
        public void run() {
          try {
            ds2.receive(new DatagramPacket(new byte[1], 1,
                InetAddress.getLocalHost(), portNum));
          } catch (InterruptedIOException e) {
            interrupted = true;
          } catch (IOException e) {
          }

View Full Code Here

      interrupted = false;
      DatagramSocket ds3 = new DatagramSocket();
      ds3.setSoTimeout(500);
      Date start = new Date();
      try {
        ds3.receive(new DatagramPacket(new byte[1], 1));
      } catch (InterruptedIOException e) {
        interrupted = true;
      }
      ds3.close();
      assertTrue("receive not interrupted", interrupted);

View Full Code Here

        Thread.sleep(1000);


        byte[] buf = new byte[128];
        DatagramPacket receive = new DatagramPacket(buf, buf.length, address, PORT);
        LOG.debug("+++ Receving data +++");
        socket.receive(receive);


        socket.close();


        return new String(receive.getData(), 0, receive.getLength());
    }

View Full Code Here

        Thread.sleep(1000);


        byte[] buf = new byte[128];
        DatagramPacket receive = new DatagramPacket(buf, buf.length, address, getPort());
        LOG.debug("+++ Receiveing data +++");
        socket.receive(receive);


        socket.close();


        return new String(receive.getData(), 0, receive.getLength());
    }

View Full Code Here

0 1 2 3 4 5 6 7 8 9

TOP

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.