1/*
2 * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24import java.io.IOException;
25import java.net.InetAddress;
26import java.net.MulticastSocket;
27import java.net.UnknownHostException;
28
29public class ClientConnection {
30
31    public final String IANA_JDP_ADDRESS = "224.0.23.178";
32    public final String IANA_JDP_PORT = "7095";
33    public final String UNDEFINED_NAME = "TheVMwithNoName";
34
35    public final int port;
36    public final InetAddress address;
37    public final int pauseInSeconds;
38    public final String instanceName;
39
40    public ClientConnection()
41            throws UnknownHostException {
42
43        String discoveryAddress = System.getProperty("com.sun.management.jdp.address", IANA_JDP_ADDRESS);
44        address = InetAddress.getByName(discoveryAddress);
45
46        String discoveryPort = System.getProperty("com.sun.management.jdp.port", IANA_JDP_PORT);
47        port = Integer.parseInt(discoveryPort);
48
49        String pause = System.getProperty("com.sun.management.jdp.pause", "1");
50        pauseInSeconds = Integer.parseUnsignedInt(pause);
51
52        instanceName = System.getProperty("com.sun.management.jdp.name", UNDEFINED_NAME);
53
54    }
55
56    public MulticastSocket connectWithTimeout(int msTimeOut) throws IOException {
57        MulticastSocket socket = new MulticastSocket(port);
58        socket.joinGroup(address);
59        socket.setSoTimeout(msTimeOut);
60        return socket;
61    }
62}
63