/*
* Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
import java.io.File;
import java.io.IOException;
import java.io.RandomAccessFile;
import java.util.Objects;
import sun.management.jdp.JdpJmxPacket;
import sun.management.jdp.JdpException;
public class JdpDoSomething {
private static final String lockFileName = "JdpDoSomething.lck";
private static final boolean verbose=false;
public static boolean getVerbose(){
return verbose;
}
public static void printJdpPacket(JdpJmxPacket p) {
if (getVerbose()) {
try {
RandomAccessFile f = new RandomAccessFile("out.dmp", "rw");
f.write(p.getPacketData());
f.close();
} catch (IOException e) {
System.out.println("Can't write a dump file: " + e);
}
System.out.println("Id: " + p.getId());
System.out.println("Jmx: " + p.getJmxServiceUrl());
System.out.println("Main: " + p.getMainClass());
System.out.println("InstanceName: " + p.getInstanceName());
System.out.flush();
}
}
public static void compaireJdpPacketEx(JdpJmxPacket p1, JdpJmxPacket p2)
throws JdpException {
if (!Objects.equals(p1, p1)) {
throw new JdpException("Packet mismatch error");
}
if (!Objects.equals(p1.getMainClass(), p2.getMainClass())) {
throw new JdpException("Packet mismatch error (main class)");
}
if (!Objects.equals(p1.getInstanceName(), p2.getInstanceName())) {
throw new JdpException("Packet mismatch error (instance name)");
}
}
public static void doSomething() {
try {
File lockFile = new File(lockFileName);
lockFile.createNewFile();
while (lockFile.exists()) {
long datetime = lockFile.lastModified();
long epoch = System.currentTimeMillis() / 1000;
// Don't allow test app to run more than an hour
if (epoch - datetime > 3600) {
System.err.println("Lock is too old. Aborting");
return;
}
Thread.sleep(1);
}
} catch (Throwable e) {
System.err.println("Something bad happens:" + e);
}
}
public static void main(String args[]) throws Exception {
System.err.println("main enter");
doSomething();
System.err.println("main exit");
}
}