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() throws SocketException

Source Link

Document

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

Usage

From source file:vmXmlFile.java

private String callOvnmanager(String node, String action) {
    String result = "";
    DatagramSocket socket = null;
    int serverPort = 9999;
    DatagramPacket packet2Send;/*from  www.j av  a  2  s  . com*/
    DatagramPacket receivedPacket;
    InetAddress theServerAddress;
    byte[] outBuffer;
    byte[] inBuffer;
    inBuffer = new byte[65536];
    outBuffer = new byte[8192];

    try {
        HttpSession session = RuntimeAccess.getInstance().getSession();
        String sessionUser = (String) session.getAttribute("User");
        if (sessionUser == null) {
            sessionUser = "administrator";
        }
        JSONObject joCmd = new JSONObject();
        JSONObject joAction = new JSONObject(action);
        joCmd.put("sender", sessionUser);
        joCmd.put("target", "VM");
        joCmd.put("node", node);
        joCmd.put("action", joAction);
        String output = joCmd.toString();

        socket = new DatagramSocket();
        InetAddress serverInet = InetAddress.getByName("localhost");
        socket.connect(serverInet, serverPort);
        outBuffer = output.getBytes();
        packet2Send = new DatagramPacket(outBuffer, outBuffer.length, serverInet, serverPort);
        // send the data
        socket.send(packet2Send);

        receivedPacket = new DatagramPacket(inBuffer, inBuffer.length);
        socket.receive(receivedPacket);

        // the server response is...
        result = new String(receivedPacket.getData(), 0, receivedPacket.getLength());
        session.setAttribute("LastActive", System.currentTimeMillis());
        socket.close();

    } catch (Exception e) {
        log(ERROR, "callOvnmanager", e);
        return e.toString();
    }
    return result;
}