server/core/ConfigurationManagerServant.java

//---PACKAGE DECLARATION---
package uk.org.iscream.cms.server.core;

//---IMPORTS---
import uk.org.iscream.cms.server.util.*;
import uk.org.iscream.cms.server.componentmanager.*;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.*;
import java.io.*;

/**
 * This class is essentially a Configuration factory.
 * This class implements the Configurator IDL and allows
 * other classes in the system ot obtain their Configuration
 *
 * On construction it requires a reference to the RootPOA
 * to allow it to create Configuration objects to be
 * returned.
 *
 * It also relies on the System.properties to set internal values.
 *
 * ###
 * A point to note is that this class does NOT yet manage
 * created configurations which may cause memory problems!
 * ###
 *
 * @author  $Author: tdb $
 * @version $Id: ConfigurationManagerServant.java,v 1.19 2001/12/10 22:20:23 tdb Exp $
 */
class ConfigurationManagerServant extends ConfigurationManagerPOA {

//---FINAL ATTRIBUTES---

    /**
     * The current CVS revision of this class
     */
    public final String REVISION = "$Revision: 1.19 $";
    
//---STATIC METHODS---

//---CONSTRUCTORS---

    /**
     * Creates a new ConfiguratorServant
     * This class uses the System.properties to set internal values
     */
    ConfigurationManagerServant() {
        // assign some local variables
        _configPath = System.getProperty("uk.org.iscream.cms.server.ConfigurationLocation");
        _systemConfigFile = System.getProperty("uk.org.iscream.cms.server.SystemConfigurationFile");

        // load the system config
        loadSystemConfig();

        // log our status
        _logger.write(toString(), Logger.SYSINIT, "started");
        _logger.write(toString(), Logger.SYSMSG, "configuration location - " + _configPath);
        _logger.write(toString(), Logger.SYSMSG, "system configuration file - " + _systemConfigFile);
    }

//---PUBLIC METHODS---
    
    /**
     * Returns a Configuration object which contains
     * the configuration data requested by the calling
     * object.
     *
     * This method will look in the systemConfig file
     * for an entry for this "source", if there is no
     * entry it returns a refernce to the system
     * config.  If there are any errors in reading the 
     * configuration, it returns null, the caller is 
     * expected to be able to handle this.
     *
     * This method also checks to see if the system.conf
     * file has been updated and reloads its reference if
     * needed.
     *
     * @param source the configuration required
     * @return the Configuration
     */
    public Configuration getConfiguration(String source) {
        _logger.write(toString(), Logger.SYSMSG, "got request for " + source);

        
        // check to see if we need to reload the system config
        // because it has changed
        if (isModified(_systemConfig.getFileList(), _systemConfig.getLastModified())) {
            _logger.write(toString(), Logger.SYSMSG, "system config changed");
            loadSystemConfig();
        }

        // search config for group membership
        // and obain a list of groups by name
        LinkedList nameGroups = getGroupMembership(source);
        // add the hosts individual config to the start of the list
        nameGroups.addFirst(source);
        
        // this list will be used to compile the groupings
        LinkedList groups = new LinkedList();
                     
        // if we are dealing with a Host.<hostname> request, then we also
        // want to look for ip address details, as configuration entries may relate to it
        // if we can't resolve it, we don't look.
        LinkedList ipGroups = null;
        if (source.startsWith("Host.")) {
            // hostname is after Host.
            String hostname = source.substring(5);
            try {
                String ip = "Host." + InetAddress.getByName(hostname).getHostAddress();
                ipGroups = getGroupMembership(ip);
                ipGroups.addFirst(ip);
                // add to our list of groups
                groups.addAll(ipGroups);
            } catch (UnknownHostException e) {
                _logger.write(toString(), Logger.ERROR, "could not resolve hostname - " + hostname);
            }
        }
        
        // add the rest of the groups to the end        
        groups.addAll(nameGroups);

        Iterator i = groups.iterator();
        String fileList = "";
        while (i.hasNext()) {
            String groupName = (String) i.next();
            _logger.write(toString(), Logger.DEBUG, "looking for config entry for - " + groupName);
            // we look for this entry in the systemConfig
            String configFile = _systemConfig.getProperty("config." + groupName);
            // if there is a config entry then
            if (configFile != null) {
                _logger.write(toString(), Logger.DEBUG, "looking for config tree in - " + configFile);
    
                // get the file list of includes etc + the system config
                String groupFileList = null;
                try {
                    groupFileList = getIncludedFiles(configFile, "") + ";";
                } catch (Exception e) {
                    // not sure what to do here
                    // so we just log the error
                    _logger.write(toString(), Logger.ERROR, "ERROR - " + e);
                }
                if (groupFileList != null) {
                    fileList += groupFileList;
                }
            } else {
                _logger.write(toString(), Logger.DEBUG, "no config entry for - " + groupName);
            }
        }
        // add the system config as the final check
        fileList = _systemConfigFile + ";" + fileList;
        _logger.write(toString(), Logger.DEBUG, "config tree - " + fileList);
        
        // build the configuration
        Configuration config = buildConfiguration(fileList);
        
        // if this is null at this point, then there will have been an error
        return config;
    }
    
    
    /**
     * When passed a file list and a current value for the lastModified
     * of the current configuration, this method compares the value
     * to the actual value of the configuration files to determine 
     * whether or not the configuration has been modified.
     *
     * @param fileList a list of files that the caller uses for configuration
     * @param lastModified the last modified date of the callers configuration
     *
     * @return whether or not the configuration has been modified
     */
    public boolean isModified(String fileList, long lastModified) {
        StringTokenizer st = new StringTokenizer(fileList, ";");
        long newLastModified;
        File currentFile;
        while (st.hasMoreTokens()) {
            currentFile = new File(_configPath, st.nextToken());
            newLastModified = currentFile.lastModified();
            if (newLastModified > lastModified) {
                return true;
            }
        }
        return false;
    }

    /**
     * Overrides the {@link java.lang.Object#toString() Object.toString()}
     * method to provide clean logging (every class should have this).
     *
     * This uses the uk.org.iscream.cms.server.util.FormatName class
     * to format the toString()
     *
     * @return the name of this class and its CVS revision
     */
    public String toString() {
        return FormatName.getName(
            _name,
            getClass().getName(),
            REVISION);
    }

//---PRIVATE METHODS---

    /**
     * This is a recursive function private to this class.
     * It constructs a hierarchy of files as a ";" serperated
     * string which can be used to read in the configuration.
     * This function calls itself.
     * 
     * @param currentFile the current file to be processed
     * @param readFiles used for recursion purposes only, these are the files it has read so far 
     *
     * @return the current list that has been constructed
     *
     * @throws IOException if there is trouble reading the file
     * @throws FileNotFoundException is there is trouble finding the file
     * @throws CircularIncludeException this is if a circular include is detected
     */
    private String getIncludedFiles(String currentFile, String readFiles) throws IOException, FileNotFoundException, Exception {
        
        // check for circular include here
        if (hasDuplicate(currentFile, readFiles) || currentFile.equals(_systemConfigFile)) {
            throw new CircularIncludeException(currentFile + " is included more than once");
        }
        
        // if there wasn't, we're gonna use this file, so make a note of it as read
        // (note the use of the ";", this is for the hasDuplicate, function)
        readFiles = readFiles + currentFile + ";";

        Properties properties = new Properties();
        properties.load(new FileInputStream(new File(_configPath, currentFile)));
        
        // get the include property
        String includes = properties.getProperty("include");

        // if we're the last file with no includes, return our name
        if (includes == null) {
            return currentFile;
        
        // otherwise, recurse over our includes
        } else {
            StringTokenizer st = new StringTokenizer(includes, ";");
            String returnList= "";
            while (st.hasMoreTokens()) {
                returnList = getIncludedFiles(st.nextToken(), readFiles) + ";" + returnList;
            }
            
            return returnList + currentFile;
        }
    }

    /**
     * This simple method checks to see if a given 
     * file exists in the given list.
     *
     * @param file the file to check the list for
     * @param fileList the list to check
     *
     * @return if the given file appeard in the list
     */
    private boolean hasDuplicate(String file, String fileList) {
        StringTokenizer st = new StringTokenizer(fileList, ";");
        while (st.hasMoreTokens()) {
            if (file.equals(st.nextToken())) {
                return true;
            }
        }
        return false;
    }

    /**
     * Opens and loads the system configuration into the 
     * local reference _systemConfig
     */
    private void loadSystemConfig() {
        _logger.write(this.toString(), Logger.SYSMSG, "reloading " + _systemConfigFile);
        // get a reference to the system config and store it
        try {
            // create the properties for the configuration
            File systemConfigFile = new File(_configPath, _systemConfigFile);
            _systemConfigHolder = new Properties();
            _systemConfigHolder.load(new FileInputStream(systemConfigFile));
            
            // create the servant
            ConfigurationServant ref = new ConfigurationServant(_systemConfigHolder, _systemConfigFile, systemConfigFile.lastModified());
            org.omg.CORBA.Object objRef = _refman.getRootPOA().servant_to_reference(ref);
            
            // narrow it to a Configuration
            _systemConfig = ConfigurationHelper.narrow(objRef);
            
        } catch (Exception e) {
            _logger.write(toString(), Logger.FATAL, "ERROR: " + e.getMessage());
        }
    }

    /**
     * Parses the system configuration file
     * for group membership entries.
     *
     * It looks for all entries of group.<name>
     * which contain the given source name
     *
     * @param source the source to find membership for
     *
     * @return the list of groups that this source is a member of
     */
    private LinkedList getGroupMembership(String source) {
        _logger.write(toString(), Logger.DEBUG, "searching groups for - " + source);
        LinkedList groupMembership = new LinkedList();        
        Iterator i = new TreeSet(_systemConfigHolder.keySet()).iterator();
        while(i.hasNext()) {
            String key = (String) i.next();
            if (key.startsWith("group.")) {
                String group = _systemConfig.getProperty(key);
                // if it is in the group
                if (group.indexOf(source) != -1) {
                    groupMembership.add(key.substring(6));
                    _logger.write(toString(), Logger.DEBUG, "group match found for - " + source + " in - " + key);
                
                // if there are wildcards in the group
                } else if (group.indexOf("*") != -1) {
                    // check the wildcards apply to this srce
                    if(StringUtils.wildcardCheck(source, group)) {
                        groupMembership.add(key.substring(6));
                        _logger.write(toString(), Logger.DEBUG, "wildcard group match found for - " + source + " in - " + key);
                    }
                }
                
            }   
        }
        return groupMembership;
    }

    /**
     * Build the properties as a Configuration to be 
     * returned to the caller
     *
     * @param fileList the list of files to build the configuration from
     *
     * @return the built Configuration
     */
    private Configuration buildConfiguration(String fileList) {
        Configuration config = null;

        // if there is an entry
        if (!fileList.equals("")) {
            try {
                
                // build the properites here from the filelist.... 
                StringTokenizer st = new StringTokenizer(fileList, ";");
                
                // some holders for variables
                File currentFile;
                long lastModified = 0, newLastModified = 0;
                Properties properties = null, prevProperties = null;
                
                // the root of all configurations will be the system config
                // so we need to open the properties of that
                Properties defaultProperties = new Properties();
                
                // This loop then iterates over the file list
                // creates the properties to be passed to the
                // Configuration constructor
                while (st.hasMoreTokens()) {
                    properties = new Properties(defaultProperties);
                    currentFile = new File(_configPath, st.nextToken());
                    newLastModified = currentFile.lastModified();
                    if (newLastModified > lastModified) {
                        lastModified = newLastModified;
                    }
                    properties.load(new FileInputStream(currentFile));
                    defaultProperties = properties;
                }

                // this creates the configuration, all nice, ready to be returned
                ConfigurationServant ref = new ConfigurationServant(properties, fileList, lastModified);
                org.omg.CORBA.Object objRef = _refman.getRootPOA().servant_to_reference(ref);
                config = ConfigurationHelper.narrow(objRef);
                _logger.write(toString(), Logger.DEBUG, "returning built configuration");
            } catch (Exception e) {
                // not sure what to do here
                // so we just log the error
                _logger.write(toString(), Logger.ERROR, "ERROR - " + e);
            }
            
        // if there isn't an entry for the requested config
        } else {
            _logger.write(toString(), Logger.DEBUG, "no configured config, returning " + _systemConfigFile);
            config = _systemConfig;
        }
        return config;
    }

//---ACCESSOR/MUTATOR METHODS---

//---ATTRIBUTES---

    /**
     * This is the friendly identifier of the
     * component this class is running in.
     * eg, a Filter may be called "filter1",
     * If this class does not have an owning
     * component,  a name from the configuration
     * can be placed here.  This name could also
     * be changed to null for utility classes.
     */
    private String _name = Core.NAME;

    /**
     * This holds a reference to the
     * system logger that is being used.
     */
    private Logger _logger = ReferenceManager.getInstance().getLogger();
    
    /**
     * A reference to the reference manager in use
     */
    private ReferenceManager _refman = ReferenceManager.getInstance();
    
    /**
     * The root path to all configurations
     */
    private String _configPath;
    
    /**
     * The name of the file that contains the system configuration
     */
    private String _systemConfigFile;
    
    /**
     * An instance of the system config
     */
    private Configuration _systemConfig;
    
    /**
     * The system config file represented by a
     * properties object.
     */
    private Properties _systemConfigHolder;
    
//---STATIC ATTRIBUTES---
    
}
Revision:	1.20
Committed:	Mon Dec 10 22:49:19 2001 UTC (22 years, 5 months ago) by tdb
Branch:	MAIN
Changes since 1.19:	+7 -83 lines
Log Message:	Pulled out the wildcardCheck method because it's rather more generic than it's use in the ConfigurationManagerServant. I still need to tidy some of the comments and variable names to abstract it a bit more, and I might also remove it taking a semi-colon seperated list - that's more behaviour of the configuration system. It's a start, and I'll remember to do the rest when I read this commit message tomorrow :)
#	User	Rev	Content
1	ajm	1.3	//---PACKAGE DECLARATION---
2	tdb	1.18	package uk.org.iscream.cms.server.core;
3	ajm	1.3
4			//---IMPORTS---
5	tdb	1.18	import uk.org.iscream.cms.server.util.*;
6			import uk.org.iscream.cms.server.componentmanager.*;
7	ajm	1.15	import java.net.InetAddress;
8			import java.net.UnknownHostException;
9	ajm	1.3	import java.util.*;
10			import java.io.*;
11
12			/**
13			* This class is essentially a Configuration factory.
14			* This class implements the Configurator IDL and allows
15			* other classes in the system ot obtain their Configuration
16			*
17			* On construction it requires a reference to the RootPOA
18			* to allow it to create Configuration objects to be
19			* returned.
20			*
21			* It also relies on the System.properties to set internal values.
22			*
23	ajm	1.6	* ###
24			* A point to note is that this class does NOT yet manage
25			* created configurations which may cause memory problems!
26			* ###
27			*
28	tdb	1.20	* @author $Author: tdb $
29			* @version $Id: ConfigurationManagerServant.java,v 1.19 2001/12/10 22:20:23 tdb Exp $
30	ajm	1.3	*/
31			class ConfigurationManagerServant extends ConfigurationManagerPOA {
32
33			//---FINAL ATTRIBUTES---
34
35			/**
36			* The current CVS revision of this class
37			*/
38	tdb	1.20	public final String REVISION = "$Revision: 1.19 $";
39	ajm	1.3
40			//---STATIC METHODS---
41
42			//---CONSTRUCTORS---
43
44			/**
45			* Creates a new ConfiguratorServant
46			* This class uses the System.properties to set internal values
47			*/
48	ajm	1.6	ConfigurationManagerServant() {
49	ajm	1.3	// assign some local variables
50	tdb	1.18	_configPath = System.getProperty("uk.org.iscream.cms.server.ConfigurationLocation");
51			_systemConfigFile = System.getProperty("uk.org.iscream.cms.server.SystemConfigurationFile");
52	ajm	1.3
53			// load the system config
54			loadSystemConfig();
55
56			// log our status
57	ajm	1.6	_logger.write(toString(), Logger.SYSINIT, "started");
58			_logger.write(toString(), Logger.SYSMSG, "configuration location - " + _configPath);
59			_logger.write(toString(), Logger.SYSMSG, "system configuration file - " + _systemConfigFile);
60	ajm	1.3	}
61
62			//---PUBLIC METHODS---
63
64			/**
65			* Returns a Configuration object which contains
66			* the configuration data requested by the calling
67			* object.
68			*
69			* This method will look in the systemConfig file
70			* for an entry for this "source", if there is no
71			* entry it returns a refernce to the system
72			* config. If there are any errors in reading the
73			* configuration, it returns null, the caller is
74			* expected to be able to handle this.
75			*
76			* This method also checks to see if the system.conf
77			* file has been updated and reloads its reference if
78			* needed.
79			*
80			* @param source the configuration required
81			* @return the Configuration
82			*/
83			public Configuration getConfiguration(String source) {
84	ajm	1.6	_logger.write(toString(), Logger.SYSMSG, "got request for " + source);
85	ajm	1.8
86	ajm	1.3
87			// check to see if we need to reload the system config
88			// because it has changed
89			if (isModified(_systemConfig.getFileList(), _systemConfig.getLastModified())) {
90	ajm	1.6	_logger.write(toString(), Logger.SYSMSG, "system config changed");
91	ajm	1.3	loadSystemConfig();
92			}
93
94	ajm	1.8	// search config for group membership
95	tdb	1.17	// and obain a list of groups by name
96			LinkedList nameGroups = getGroupMembership(source);
97			// add the hosts individual config to the start of the list
98			nameGroups.addFirst(source);
99	ajm	1.15
100	tdb	1.17	// this list will be used to compile the groupings
101			LinkedList groups = new LinkedList();
102
103	ajm	1.15	// if we are dealing with a Host.<hostname> request, then we also
104			// want to look for ip address details, as configuration entries may relate to it
105			// if we can't resolve it, we don't look.
106	tdb	1.17	LinkedList ipGroups = null;
107	ajm	1.15	if (source.startsWith("Host.")) {
108			// hostname is after Host.
109			String hostname = source.substring(5);
110			try {
111			String ip = "Host." + InetAddress.getByName(hostname).getHostAddress();
112	tdb	1.17	ipGroups = getGroupMembership(ip);
113			ipGroups.addFirst(ip);
114			// add to our list of groups
115	ajm	1.15	groups.addAll(ipGroups);
116			} catch (UnknownHostException e) {
117			_logger.write(toString(), Logger.ERROR, "could not resolve hostname - " + hostname);
118			}
119			}
120	tdb	1.17
121			// add the rest of the groups to the end
122			groups.addAll(nameGroups);
123	ajm	1.3
124	ajm	1.8	Iterator i = groups.iterator();
125			String fileList = "";
126			while (i.hasNext()) {
127			String groupName = (String) i.next();
128	ajm	1.11	_logger.write(toString(), Logger.DEBUG, "looking for config entry for - " + groupName);
129	ajm	1.8	// we look for this entry in the systemConfig
130			String configFile = _systemConfig.getProperty("config." + groupName);
131	ajm	1.11	// if there is a config entry then
132			if (configFile != null) {
133			_logger.write(toString(), Logger.DEBUG, "looking for config tree in - " + configFile);
134
135			// get the file list of includes etc + the system config
136			String groupFileList = null;
137			try {
138			groupFileList = getIncludedFiles(configFile, "") + ";";
139			} catch (Exception e) {
140			// not sure what to do here
141			// so we just log the error
142			_logger.write(toString(), Logger.ERROR, "ERROR - " + e);
143			}
144			if (groupFileList != null) {
145			fileList += groupFileList;
146			}
147			} else {
148			_logger.write(toString(), Logger.DEBUG, "no config entry for - " + groupName);
149	tdb	1.12	}
150	ajm	1.3	}
151	ajm	1.8	// add the system config as the final check
152	tdb	1.13	fileList = _systemConfigFile + ";" + fileList;
153	ajm	1.8	_logger.write(toString(), Logger.DEBUG, "config tree - " + fileList);
154
155			// build the configuration
156			Configuration config = buildConfiguration(fileList);
157	ajm	1.3
158			// if this is null at this point, then there will have been an error
159			return config;
160			}
161
162
163			/**
164			* When passed a file list and a current value for the lastModified
165			* of the current configuration, this method compares the value
166			* to the actual value of the configuration files to determine
167			* whether or not the configuration has been modified.
168			*
169			* @param fileList a list of files that the caller uses for configuration
170			* @param lastModified the last modified date of the callers configuration
171			*
172			* @return whether or not the configuration has been modified
173			*/
174			public boolean isModified(String fileList, long lastModified) {
175			StringTokenizer st = new StringTokenizer(fileList, ";");
176			long newLastModified;
177			File currentFile;
178			while (st.hasMoreTokens()) {
179			currentFile = new File(_configPath, st.nextToken());
180			newLastModified = currentFile.lastModified();
181			if (newLastModified > lastModified) {
182			return true;
183			}
184			}
185			return false;
186			}
187	ajm	1.6
188	ajm	1.3	/**
189			* Overrides the {@link java.lang.Object#toString() Object.toString()}
190			* method to provide clean logging (every class should have this).
191			*
192	tdb	1.18	* This uses the uk.org.iscream.cms.server.util.FormatName class
193	ajm	1.6	* to format the toString()
194			*
195	ajm	1.3	* @return the name of this class and its CVS revision
196			*/
197			public String toString() {
198	ajm	1.6	return FormatName.getName(
199			_name,
200			getClass().getName(),
201			REVISION);
202	ajm	1.3	}
203
204			//---PRIVATE METHODS---
205
206			/**
207			* This is a recursive function private to this class.
208			* It constructs a hierarchy of files as a ";" serperated
209			* string which can be used to read in the configuration.
210			* This function calls itself.
211			*
212			* @param currentFile the current file to be processed
213	ajm	1.4	* @param readFiles used for recursion purposes only, these are the files it has read so far
214			*
215	ajm	1.3	* @return the current list that has been constructed
216			*
217			* @throws IOException if there is trouble reading the file
218			* @throws FileNotFoundException is there is trouble finding the file
219	ajm	1.4	* @throws CircularIncludeException this is if a circular include is detected
220	ajm	1.3	*/
221	ajm	1.4	private String getIncludedFiles(String currentFile, String readFiles) throws IOException, FileNotFoundException, Exception {
222
223			// check for circular include here
224			if (hasDuplicate(currentFile, readFiles) \|\| currentFile.equals(_systemConfigFile)) {
225			throw new CircularIncludeException(currentFile + " is included more than once");
226			}
227
228			// if there wasn't, we're gonna use this file, so make a note of it as read
229			// (note the use of the ";", this is for the hasDuplicate, function)
230			readFiles = readFiles + currentFile + ";";
231
232	ajm	1.3	Properties properties = new Properties();
233			properties.load(new FileInputStream(new File(_configPath, currentFile)));
234	ajm	1.4
235			// get the include property
236	ajm	1.3	String includes = properties.getProperty("include");
237	ajm	1.4
238			// if we're the last file with no includes, return our name
239	ajm	1.3	if (includes == null) {
240			return currentFile;
241	ajm	1.4
242			// otherwise, recurse over our includes
243	ajm	1.3	} else {
244			StringTokenizer st = new StringTokenizer(includes, ";");
245			String returnList= "";
246			while (st.hasMoreTokens()) {
247	ajm	1.4	returnList = getIncludedFiles(st.nextToken(), readFiles) + ";" + returnList;
248	ajm	1.3	}
249	ajm	1.4
250	ajm	1.3	return returnList + currentFile;
251			}
252			}
253
254			/**
255	ajm	1.4	* This simple method checks to see if a given
256			* file exists in the given list.
257			*
258			* @param file the file to check the list for
259			* @param fileList the list to check
260			*
261			* @return if the given file appeard in the list
262			*/
263			private boolean hasDuplicate(String file, String fileList) {
264			StringTokenizer st = new StringTokenizer(fileList, ";");
265			while (st.hasMoreTokens()) {
266			if (file.equals(st.nextToken())) {
267			return true;
268			}
269			}
270			return false;
271			}
272
273			/**
274	ajm	1.3	* Opens and loads the system configuration into the
275			* local reference _systemConfig
276			*/
277			private void loadSystemConfig() {
278	ajm	1.6	_logger.write(this.toString(), Logger.SYSMSG, "reloading " + _systemConfigFile);
279	ajm	1.3	// get a reference to the system config and store it
280			try {
281			// create the properties for the configuration
282			File systemConfigFile = new File(_configPath, _systemConfigFile);
283	ajm	1.8	_systemConfigHolder = new Properties();
284			_systemConfigHolder.load(new FileInputStream(systemConfigFile));
285
286	ajm	1.3	// create the servant
287	ajm	1.8	ConfigurationServant ref = new ConfigurationServant(_systemConfigHolder, _systemConfigFile, systemConfigFile.lastModified());
288	ajm	1.6	org.omg.CORBA.Object objRef = _refman.getRootPOA().servant_to_reference(ref);
289	ajm	1.3
290			// narrow it to a Configuration
291			_systemConfig = ConfigurationHelper.narrow(objRef);
292
293			} catch (Exception e) {
294	ajm	1.6	_logger.write(toString(), Logger.FATAL, "ERROR: " + e.getMessage());
295	ajm	1.3	}
296			}
297
298	ajm	1.8	/**
299			* Parses the system configuration file
300			* for group membership entries.
301			*
302			* It looks for all entries of group.<name>
303			* which contain the given source name
304			*
305			* @param source the source to find membership for
306			*
307			* @return the list of groups that this source is a member of
308			*/
309			private LinkedList getGroupMembership(String source) {
310	tdb	1.20	_logger.write(toString(), Logger.DEBUG, "searching groups for - " + source);
311	ajm	1.8	LinkedList groupMembership = new LinkedList();
312			Iterator i = new TreeSet(_systemConfigHolder.keySet()).iterator();
313			while(i.hasNext()) {
314			String key = (String) i.next();
315			if (key.startsWith("group.")) {
316			String group = _systemConfig.getProperty(key);
317	ajm	1.15	// if it is in the group
318	ajm	1.8	if (group.indexOf(source) != -1) {
319			groupMembership.add(key.substring(6));
320	tdb	1.20	_logger.write(toString(), Logger.DEBUG, "group match found for - " + source + " in - " + key);
321	ajm	1.15
322			// if there are wildcards in the group
323			} else if (group.indexOf("*") != -1) {
324			// check the wildcards apply to this srce
325	tdb	1.20	if(StringUtils.wildcardCheck(source, group)) {
326	ajm	1.15	groupMembership.add(key.substring(6));
327	tdb	1.20	_logger.write(toString(), Logger.DEBUG, "wildcard group match found for - " + source + " in - " + key);
328	ajm	1.15	}
329	ajm	1.8	}
330	ajm	1.15
331	ajm	1.8	}
332			}
333			return groupMembership;
334	ajm	1.15	}
335	ajm	1.8
336			/**
337			* Build the properties as a Configuration to be
338			* returned to the caller
339			*
340			* @param fileList the list of files to build the configuration from
341			*
342			* @return the built Configuration
343			*/
344			private Configuration buildConfiguration(String fileList) {
345			Configuration config = null;
346
347			// if there is an entry
348	ajm	1.10	if (!fileList.equals("")) {
349	ajm	1.8	try {
350
351			// build the properites here from the filelist....
352			StringTokenizer st = new StringTokenizer(fileList, ";");
353
354			// some holders for variables
355			File currentFile;
356	tdb	1.14	long lastModified = 0, newLastModified = 0;
357			Properties properties = null, prevProperties = null;
358	ajm	1.8
359			// the root of all configurations will be the system config
360			// so we need to open the properties of that
361			Properties defaultProperties = new Properties();
362
363			// This loop then iterates over the file list
364			// creates the properties to be passed to the
365			// Configuration constructor
366	tdb	1.13	while (st.hasMoreTokens()) {
367	ajm	1.8	properties = new Properties(defaultProperties);
368			currentFile = new File(_configPath, st.nextToken());
369			newLastModified = currentFile.lastModified();
370			if (newLastModified > lastModified) {
371			lastModified = newLastModified;
372			}
373			properties.load(new FileInputStream(currentFile));
374			defaultProperties = properties;
375	tdb	1.13	}
376	ajm	1.8
377			// this creates the configuration, all nice, ready to be returned
378			ConfigurationServant ref = new ConfigurationServant(properties, fileList, lastModified);
379			org.omg.CORBA.Object objRef = _refman.getRootPOA().servant_to_reference(ref);
380			config = ConfigurationHelper.narrow(objRef);
381	tdb	1.13	_logger.write(toString(), Logger.DEBUG, "returning built configuration");
382	ajm	1.8	} catch (Exception e) {
383			// not sure what to do here
384			// so we just log the error
385	ajm	1.10	_logger.write(toString(), Logger.ERROR, "ERROR - " + e);
386	ajm	1.8	}
387
388			// if there isn't an entry for the requested config
389			} else {
390			_logger.write(toString(), Logger.DEBUG, "no configured config, returning " + _systemConfigFile);
391			config = _systemConfig;
392			}
393			return config;
394			}
395
396	ajm	1.3	//---ACCESSOR/MUTATOR METHODS---
397
398			//---ATTRIBUTES---
399
400			/**
401	ajm	1.6	* This is the friendly identifier of the
402			* component this class is running in.
403			* eg, a Filter may be called "filter1",
404			* If this class does not have an owning
405			* component, a name from the configuration
406			* can be placed here. This name could also
407			* be changed to null for utility classes.
408			*/
409			private String _name = Core.NAME;
410
411			/**
412			* This holds a reference to the
413			* system logger that is being used.
414	ajm	1.3	*/
415	ajm	1.6	private Logger _logger = ReferenceManager.getInstance().getLogger();
416	ajm	1.3
417			/**
418	ajm	1.6	* A reference to the reference manager in use
419	ajm	1.3	*/
420	ajm	1.6	private ReferenceManager _refman = ReferenceManager.getInstance();
421	ajm	1.3
422			/**
423			* The root path to all configurations
424			*/
425			private String _configPath;
426
427			/**
428			* The name of the file that contains the system configuration
429			*/
430			private String _systemConfigFile;
431
432			/**
433			* An instance of the system config
434			*/
435			private Configuration _systemConfig;
436	ajm	1.8
437			/**
438			* The system config file represented by a
439			* properties object.
440			*/
441			private Properties _systemConfigHolder;
442	ajm	1.3
443			//---STATIC ATTRIBUTES---
444
445			}