code: public String getSystemAltUserId()
  	{
  		// If a localized value is set, use it
  		if (!EventUtils.isEmptyOrNull(systemAltUserId)) {
  			return systemAltUserId;
  		}
  		
  		// Check if a configuration parameter is set
  		systemAltUserId = getConfig().getSystemAltUserId();
  		if (!EventUtils.isEmptyOrNull(systemAltUserId)) {
  			return systemAltUserId;
  		}
  		
  		// If both are empty, attempt to determine the alternate user id
  		// per IHE specifications (e.g. owner JVM's process id)
  		String processId = null;
  		try {
  			// JVM specification says the runtime bean name may contain
  			// the process and context information about the JVM, including
  			// process ID.  Attempt to get this information
  			RuntimeMXBean mx = ManagementFactory.getRuntimeMXBean();
  			processId = mx.getName();
  	
  			int pointer;
  			if (( pointer = processId.indexOf('@')) != -1) {
  				processId = processId.substring(0,pointer);
  			}
  		} catch (Throwable t) {
  			// Ignore errors and exceptions, we'll just fake it
  		}
  		
  		// If we can't get the process ID or if it's not set, fake it
  		if (EventUtils.isEmptyOrNull(processId)) {
  			processId = String.valueOf((int)(Math.random()*1000));
  		}
  		
  		systemAltUserId = processId;
  
  		return systemAltUserId;
  	}
docs: Get alternate user id for the system's ActiveParticipant in
  audit messages.  This is either set in configuration or
  the the auditor will attempt to determine it from the JVM's process
  id.
  
  @see org.openhealthtools.ihe.atna.auditor.context.AuditorModuleConfig#setSystemAltUserId(String)
  @return The alternate user id