private int searchForMember(ProcessIdentity procid, List<ProcessIdentity> member_list)
	{
		Iterator iterator = member_list.iterator();
		ProcessIdentity tmp_procid;
		int i = 0;
		while (iterator.hasNext())
		{
			tmp_procid = (ProcessIdentity)iterator.next();
			if (tmp_procid.getIp().compareTo(procid.getIp()) == 0 &&
					tmp_procid.getPort() == procid.getPort())
			{
				break;
			}
			i++;
		}
		
		if (i < member_list.size())
		{
			return 0;
		}else
		{
			return -1;
		}
	}