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  /*
   * JBoss, Home of Professional Open Source
   * Copyright 2006, Red Hat Middleware LLC, and individual contributors
   * as indicated by the @author tags.
   * See the copyright.txt in the distribution for a
   * full listing of individual contributors.
   * This copyrighted material is made available to anyone wishing to use,
   * modify, copy, or redistribute it subject to the terms and conditions
   * of the GNU Lesser General Public License, v. 2.1.
  * This program is distributed in the hope that it will be useful, but WITHOUT A
  * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
  * PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more details.
  * You should have received a copy of the GNU Lesser General Public License,
  * v.2.1 along with this distribution; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
  * MA  02110-1301, USA.
  *
  * (C) 2005-2006,
  * @author JBoss Inc.
  */
 /*
  * Copyright (C) 2001,
  *
  * Hewlett-Packard Arjuna Labs,
  * Newcastle upon Tyne,
  * Tyne and Wear,
  * UK.
  *
  * $Id: SocketProcessId.java 2342 2006-03-30 13:06:17Z  $
  */
 
 package com.arjuna.ats.internal.arjuna.utils;
 
Obtains a unique value to represent the process id via configuration. Other options include ... int pid = Integer.parseInt((new File("/proc/self")).getCanonicalFile().getName()); // linux specific Un*x specific ... String[] cmd = {"/bin/sh", "-c", "echo $PPID"}; Process proc = Runtime.getRuntime().exec(cmd); Field field = proc.getClass().getDeclaredField("pid"); field.setAccessible(true); _pid = field.getInt(proc); // although this is the child pid! proc.destroy(); byte[] ba = new byte[100]; String[] cmd = {"/bin/sh", "-c", "echo $PPID"}; Process proc = Runtime.getRuntime().exec(cmd); proc.getInputStream().read(ba); System.out.println(new String(ba)); http://java.sun.com/javase/6/docs/jdk/api/attach/spec/com/sun/tools/attach/VirtualMachine.html // JDK 6 only and ... MonitoredHost host = MonitoredHost.getMonitoredHost(null); for (Object activeVmPid : host.activeVms()) int pid = (Integer) activeVmPid; and ... Process proc = Runtime.getRuntime().exec(cmd); Field field = proc.getClass().getDeclaredField("pid"); field.setAccessible(true); _pid = field.getInt(proc); // although this is the child pid!
 
 
 public class ManualProcessId implements com.arjuna.ats.arjuna.utils.Process
 {

    

Returns:
the process id. This had better be unique between processes on the same machine. If not we're in trouble!
 
 
     public int getpid ()
     {
         synchronized (.)
         {
             if ( == -1)
             {
                  = arjPropertyManager.getCoreEnvironmentBean().getPid();
             }
         }
 
        if ( == -1)
            throw new FatalError(..get_utils_ManualProcessId_1());
        return ;
    }
    private static final Object _lock = new Object();
    private int _pid = -1;
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