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 

    24 import java.io.File;

    25 import java.io.IOException;

    26 import java.io.RandomAccessFile;

    27 import java.util.Objects;

    28 

    29 import sun.management.jdp.JdpJmxPacket;

    30 import sun.management.jdp.JdpException;

    31 

    32 public class JdpDoSomething {

    33 

    34     private static final String lockFileName = "JdpDoSomething.lck";

    35     private static final boolean verbose = false;

    36 

    37     public static boolean getVerbose() {

    38         return verbose;

    39     }

    40 

    41     public static void printJdpPacket(JdpJmxPacket p) {

    42         if (getVerbose()) {

    43             try {

    44                 RandomAccessFile f = new RandomAccessFile("out.dmp", "rw");

    45                 f.write(p.getPacketData());

    46                 f.close();

    47             } catch (IOException e) {

    48                 System.out.println("Can't write a dump file: " + e);

    49             }

    50 

    51             System.out.println("Id: " + p.getId());

    52             System.out.println("Jmx: " + p.getJmxServiceUrl());

    53             System.out.println("Main: " + p.getMainClass());

    54             System.out.println("InstanceName: " + p.getInstanceName());

    55             System.out.println("ProccessId: " + p.getProcessId());

    56             System.out.println("BroadcastInterval: " + p.getBroadcastInterval());

    57             System.out.println("Rmi Hostname: " + p.getRmiHostname());

    58 

    59             System.out.flush();

    60         }

    61     }

    62 

    63     public static void compaireJdpPacketEx(JdpJmxPacket p1, JdpJmxPacket p2)

    64             throws JdpException {

    65 

    66         if (!Objects.equals(p1, p1)) {

    67             throw new JdpException("Packet mismatch error");

    68         }

    69 

    70         if (!Objects.equals(p1.getMainClass(), p2.getMainClass())) {

    71             throw new JdpException("Packet mismatch error (main class)");

    72         }

    73 

    74         if (!Objects.equals(p1.getInstanceName(), p2.getInstanceName())) {

    75             throw new JdpException("Packet mismatch error (instance name)");

    76         }

    77     }

    78 

    79     public static void doSomething() {

    80         try {

    81             File lockFile = new File(lockFileName);

    82             lockFile.createNewFile();

    83 

    84             while (lockFile.exists()) {

    85                 long datetime = lockFile.lastModified();

    86                 long epoch = System.currentTimeMillis() / 1000;

    87 

    88                 // Don't allow test app to run more than an hour

    89                 if (epoch - datetime > 3600) {

    90                     System.err.println("Lock is too old. Aborting");

    91                     return;

    92                 }

    93                 Thread.sleep(1);

    94             }

    95 

    96         } catch (Throwable e) {

    97             System.err.println("Something bad happens:" + e);

    98         }

    99     }

   100 

   101     public static void main(String args[]) throws Exception {

   102         System.err.println("main enter");

   103         doSomething();

   104         System.err.println("main exit");

   105     }

   106 }