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/* |
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* i-scream central monitoring system |
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* http://www.i-scream.org |
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* Copyright (C) 2000-2002 i-scream |
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* |
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* This program is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU General Public License |
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* as published by the Free Software Foundation; either version 2 |
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* of the License, or (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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*/ |
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|
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//---PACKAGE DECLARATION--- |
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package uk.ac.ukc.iscream.core; |
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package uk.org.iscream.cms.server.core; |
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//---IMPORTS--- |
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import uk.ac.ukc.iscream.util.*; |
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import uk.org.iscream.cms.util.*; |
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import uk.org.iscream.cms.server.componentmanager.*; |
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import java.net.InetAddress; |
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import java.net.UnknownHostException; |
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import java.util.*; |
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import java.io.*; |
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|
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* |
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* It also relies on the System.properties to set internal values. |
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* |
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* ### |
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* A point to note is that this class does NOT yet manage |
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* created configurations which may cause memory problems! |
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* ### |
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* |
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* @author $Author$ |
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* @version $Id$ |
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*/ |
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*/ |
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ConfigurationManagerServant() { |
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// assign some local variables |
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_configPath = System.getProperty("uk.ac.ukc.iscream.ConfigurationLocation"); |
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_systemConfigFile = System.getProperty("uk.ac.ukc.iscream.SystemConfigurationFile"); |
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_configPath = System.getProperty("uk.org.iscream.cms.server.ConfigurationLocation"); |
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_systemConfigFile = System.getProperty("uk.org.iscream.cms.server.SystemConfigurationFile"); |
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|
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// load the system config |
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loadSystemConfig(); |
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*/ |
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public Configuration getConfiguration(String source) { |
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_logger.write(toString(), Logger.SYSMSG, "got request for " + source); |
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Configuration config = null; |
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|
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|
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// check to see if we need to reload the system config |
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// because it has changed |
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loadSystemConfig(); |
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} |
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|
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// we look for this entry in the systemConfig |
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String configFile = _systemConfig.getProperty("config." + source); |
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_logger.write(toString(), Logger.DEBUG, "looking for config tree in - " + configFile); |
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|
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// if there is an entry |
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if (configFile != null) { |
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// search config for group membership |
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// and obain a list of groups by name |
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LinkedList nameGroups = getGroupMembership(source); |
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// add the hosts individual config to the start of the list |
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nameGroups.addFirst(source); |
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|
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// this list will be used to compile the groupings |
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LinkedList groups = new LinkedList(); |
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|
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// if we are dealing with a Host.<hostname> request, then we also |
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// want to look for ip address details, as configuration entries may relate to it |
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// if we can't resolve it, we don't look. |
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LinkedList ipGroups = null; |
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if (source.startsWith("Host.")) { |
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// hostname is after Host. |
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String hostname = source.substring(5); |
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try { |
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// get the file list of includes etc + the system config |
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String fileList = _systemConfigFile + ";" + getIncludedFiles(configFile, ""); |
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_logger.write(toString(), Logger.DEBUG, "config tree - " + fileList); |
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|
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// build the properites here from the filelist.... |
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StringTokenizer st = new StringTokenizer(fileList, ";"); |
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|
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// some holders for variables |
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File currentFile; |
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long lastModified, newLastModified; |
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Properties properties, prevProperties; |
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|
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// the root of all configurations will be the system config |
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// so we need to open the properties of that |
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Properties defaultProperties = new Properties(); |
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currentFile = new File(_configPath, _systemConfigFile); |
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lastModified = currentFile.lastModified(); |
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defaultProperties.load(new FileInputStream(currentFile)); |
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|
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// This loop then iterates over the file list |
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// creates the properties to be passed to the |
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// Configuration constructor |
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do { |
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properties = new Properties(defaultProperties); |
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currentFile = new File(_configPath, st.nextToken()); |
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newLastModified = currentFile.lastModified(); |
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if (newLastModified > lastModified) { |
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lastModified = newLastModified; |
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} |
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properties.load(new FileInputStream(currentFile)); |
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defaultProperties = properties; |
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} while (st.hasMoreTokens()); |
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String ip = "Host." + InetAddress.getByName(hostname).getHostAddress(); |
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ipGroups = getGroupMembership(ip); |
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ipGroups.addFirst(ip); |
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// add to our list of groups |
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groups.addAll(ipGroups); |
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} catch (UnknownHostException e) { |
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_logger.write(toString(), Logger.ERROR, "could not resolve hostname - " + hostname); |
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} |
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} |
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|
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// add the rest of the groups to the end |
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groups.addAll(nameGroups); |
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|
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// this creates the configuration, all nice, ready to be returned |
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ConfigurationServant ref = new ConfigurationServant(properties, fileList, lastModified); |
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org.omg.CORBA.Object objRef = _refman.getRootPOA().servant_to_reference(ref); |
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config = ConfigurationHelper.narrow(objRef); |
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|
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} catch (Exception e) { |
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// not sure what to do here |
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// so we just log the error |
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_logger.write(toString(), Logger.ERROR, "ERROR - " + e.getMessage()); |
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Iterator i = groups.iterator(); |
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String fileList = ""; |
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while (i.hasNext()) { |
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String groupName = (String) i.next(); |
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_logger.write(toString(), Logger.DEBUG, "looking for config entry for - " + groupName); |
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// we look for this entry in the systemConfig |
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String configFile = _systemConfig.getProperty("config." + groupName); |
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// if there is a config entry then |
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if (configFile != null) { |
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_logger.write(toString(), Logger.DEBUG, "looking for config tree in - " + configFile); |
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|
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// get the file list of includes etc + the system config |
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String groupFileList = null; |
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try { |
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groupFileList = getIncludedFiles(configFile, "") + ";"; |
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} catch (Exception e) { |
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// not sure what to do here |
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// so we just log the error |
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_logger.write(toString(), Logger.ERROR, "ERROR - " + e); |
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} |
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if (groupFileList != null) { |
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fileList += groupFileList; |
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} |
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} else { |
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_logger.write(toString(), Logger.DEBUG, "no config entry for - " + groupName); |
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} |
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|
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// if there isn't an entry for the requested config |
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} else { |
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_logger.write(toString(), Logger.DEBUG, "no configured config, returning " + _systemConfigFile); |
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config = _systemConfig; |
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} |
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// add the system config as the final check |
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fileList = _systemConfigFile + ";" + fileList; |
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_logger.write(toString(), Logger.DEBUG, "config tree - " + fileList); |
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|
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// build the configuration |
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Configuration config = buildConfiguration(fileList); |
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|
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// if this is null at this point, then there will have been an error |
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return config; |
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} |
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* Overrides the {@link java.lang.Object#toString() Object.toString()} |
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* method to provide clean logging (every class should have this). |
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* |
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* This uses the uk.ac.ukc.iscream.util.FormatName class |
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* This uses the uk.org.iscream.cms.util.FormatName class |
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* to format the toString() |
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* |
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* @return the name of this class and its CVS revision |
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try { |
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// create the properties for the configuration |
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File systemConfigFile = new File(_configPath, _systemConfigFile); |
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Properties systemConfigHolder = new Properties(); |
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systemConfigHolder.load(new FileInputStream(systemConfigFile)); |
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|
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_systemConfigHolder = new Properties(); |
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_systemConfigHolder.load(new FileInputStream(systemConfigFile)); |
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|
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// create the servant |
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ConfigurationServant ref = new ConfigurationServant(systemConfigHolder, _systemConfigFile, systemConfigFile.lastModified()); |
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ConfigurationServant ref = new ConfigurationServant(_systemConfigHolder, _systemConfigFile, systemConfigFile.lastModified()); |
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org.omg.CORBA.Object objRef = _refman.getRootPOA().servant_to_reference(ref); |
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// narrow it to a Configuration |
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} |
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} |
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|
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/** |
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* Parses the system configuration file |
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* for group membership entries. |
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* |
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* It looks for all entries of group.<name> |
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* which contain the given source name |
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* |
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* @param source the source to find membership for |
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* |
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* @return the list of groups that this source is a member of |
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*/ |
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private LinkedList getGroupMembership(String source) { |
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_logger.write(toString(), Logger.DEBUG, "searching groups for - " + source); |
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LinkedList groupMembership = new LinkedList(); |
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Iterator i = new TreeSet(_systemConfigHolder.keySet()).iterator(); |
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while(i.hasNext()) { |
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String key = (String) i.next(); |
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// look for a key that's a group entry |
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if (key.startsWith("group.")) { |
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// get the list of hosts in the group |
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String group = _systemConfig.getProperty(key); |
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if(groupMatch(source, group)) { |
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groupMembership.add(key.substring(6)); |
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_logger.write(toString(), Logger.DEBUG, "group match found for - " + source + " in group - " + key); |
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} |
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} |
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} |
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return groupMembership; |
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} |
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|
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/** |
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* Checks that a given source is matched within the |
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* given list of hosts. For example:<br> |
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* <br> |
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* Given "stue5de.ukc.ac.uk"<br> |
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* And "raptor.ukc.ac.uk;stue*.ukc.ac.uk<br> |
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* <br> |
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* This method would return true as there is a match. |
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* |
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* This method will also match if the source is exactly |
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* matched within the group of hosts (ie. no wildcard). |
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* |
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* @param source the string to look for |
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* @param group the group to search for a match |
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* |
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* @return if there is a match |
359 |
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*/ |
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public static boolean groupMatch(String source, String group) { |
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StringTokenizer st = new StringTokenizer(group, ";"); |
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// go through all the hosts in the group |
363 |
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while (st.hasMoreTokens()) { |
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String host = st.nextToken(); |
365 |
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if(StringUtils.wildcardMatch(source, host)) { |
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return true; |
367 |
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} |
368 |
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} |
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// not had a match |
370 |
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return false; |
371 |
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} |
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|
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/** |
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* Build the properties as a Configuration to be |
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* returned to the caller |
376 |
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* |
377 |
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* @param fileList the list of files to build the configuration from |
378 |
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* |
379 |
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* @return the built Configuration |
380 |
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*/ |
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private Configuration buildConfiguration(String fileList) { |
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Configuration config = null; |
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|
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// if there is an entry |
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if (!fileList.equals("")) { |
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try { |
387 |
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|
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// build the properites here from the filelist.... |
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StringTokenizer st = new StringTokenizer(fileList, ";"); |
390 |
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|
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// some holders for variables |
392 |
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File currentFile; |
393 |
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long lastModified = 0, newLastModified = 0; |
394 |
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Properties properties = null, prevProperties = null; |
395 |
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|
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// the root of all configurations will be the system config |
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// so we need to open the properties of that |
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Properties defaultProperties = new Properties(); |
399 |
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|
400 |
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// This loop then iterates over the file list |
401 |
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// creates the properties to be passed to the |
402 |
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// Configuration constructor |
403 |
+ |
while (st.hasMoreTokens()) { |
404 |
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properties = new Properties(defaultProperties); |
405 |
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currentFile = new File(_configPath, st.nextToken()); |
406 |
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newLastModified = currentFile.lastModified(); |
407 |
+ |
if (newLastModified > lastModified) { |
408 |
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lastModified = newLastModified; |
409 |
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} |
410 |
+ |
properties.load(new FileInputStream(currentFile)); |
411 |
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defaultProperties = properties; |
412 |
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} |
413 |
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|
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// this creates the configuration, all nice, ready to be returned |
415 |
+ |
ConfigurationServant ref = new ConfigurationServant(properties, fileList, lastModified); |
416 |
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org.omg.CORBA.Object objRef = _refman.getRootPOA().servant_to_reference(ref); |
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config = ConfigurationHelper.narrow(objRef); |
418 |
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_logger.write(toString(), Logger.DEBUG, "returning built configuration"); |
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} catch (Exception e) { |
420 |
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// not sure what to do here |
421 |
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// so we just log the error |
422 |
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_logger.write(toString(), Logger.ERROR, "ERROR - " + e); |
423 |
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} |
424 |
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|
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// if there isn't an entry for the requested config |
426 |
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} else { |
427 |
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_logger.write(toString(), Logger.DEBUG, "no configured config, returning " + _systemConfigFile); |
428 |
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config = _systemConfig; |
429 |
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} |
430 |
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return config; |
431 |
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} |
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|
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//---ACCESSOR/MUTATOR METHODS--- |
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|
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//---ATTRIBUTES--- |
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* An instance of the system config |
471 |
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*/ |
472 |
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private Configuration _systemConfig; |
473 |
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|
474 |
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/** |
475 |
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* The system config file represented by a |
476 |
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* properties object. |
477 |
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*/ |
478 |
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private Properties _systemConfigHolder; |
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|
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//---STATIC ATTRIBUTES--- |
481 |
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