server/client/WebFeeder.java

//---PACKAGE DECLARATION---
package uk.org.iscream.client;

//---IMPORTS---
import uk.org.iscream.componentmanager.*;
import uk.org.iscream.core.*;
import uk.org.iscream.util.*;
import java.io.*;

/**
 * Provides a feed to the webpage system.
 *
 * !! There may also be need to have a Thread to grab any
 * !! required config (groups, "nice names, etc) and dump
 * !! that to a file.
 *
 * @author  $Author: tdb1 $
 * @version $Id: WebFeeder.java,v 1.13 2001/03/16 02:40:04 tdb1 Exp $
 */
public class WebFeeder extends Thread {

//---FINAL ATTRIBUTES---

    /**
     * The current CVS revision of this class
     */
    public static final String REVISION = "$Revision: 1.13 $";
    
    /**
     * Default check period in seconds (30 minutes)
     */
    public final int DEFAULT_CHECK_PERIOD = 1800;
    
    /**
     * Delete alerts older than this in seconds, default.
     */
    public final int DEFAULT_AGE = 3600;
    
    /**
     * The default path seperator, here for convienience
     */
    private final String sep = File.separator;
    
//---STATIC METHODS---

    /**
     * Return a reference to the single class.
     * Construct it if it does not already exist, otherwise just return the reference.
     */
    public static WebFeeder getInstance() {
        if (_instance == null){
            _instance = new WebFeeder();
        }
        return _instance;
    }

//---CONSTRUCTORS---
    
    /**
     * Construct a new WebFeeder. This will also wipe out any
     * old Alerts, as these can't be carried from one session
     * until the next.
     */
    private WebFeeder() {
        // do something, or nothing.. but must be private
        // don't need to cleanup latest data
        
        // -- cleanup old alerts
        // get config proxy
        ConfigurationProxy cp = ConfigurationProxy.getInstance();
        // get file locations
        String rootPath, alertSubDir, alertFileName;
        try {
            // work out where things are
            rootPath = cp.getProperty("WebFeeder", "WebFeeder.rootPath");
            alertSubDir = cp.getProperty("WebFeeder", "WebFeeder.alertSubDir");
            File alertsDir = new File(rootPath, alertSubDir);
            if(deleteContents(alertsDir)) {
                _logger.write(this.toString(), Logger.DEBUG, "Deleted all files and directories from: "+rootPath+sep+alertSubDir);
            } else {
                _logger.write(this.toString(), Logger.WARNING, "Failed to delete all files and directories from: "+rootPath+sep+alertSubDir);
            }
            // cleanup complete
        } catch (PropertyNotFoundException e) {
            _logger.write(this.toString(), Logger.ERROR, "Failed to cleanup on construction, due to failing to get config for Alert Data: "+e);
            // just leave it at that
        }
        
        // set our name and startup
        setName("client.WebFeeder");
        start();
    }

//---PUBLIC METHODS---
    
    /**
     * Thread loop, will check at intervals for any files
     * that need to be "cleaned up". This will normally
     * be OK and FINAL alerts that have been around for longer
     * than a specified period of time.
     */
    public void run() {
        boolean running = true;
        // get config proxy
        ConfigurationProxy cp = ConfigurationProxy.getInstance();
        // loop round
        while(running) {
            // get our check period
            int checkPeriod = 0;
            try {
                checkPeriod = Integer.parseInt(cp.getProperty("WebFeeder", "WebFeeder.checkPeriod"));
            } catch (NumberFormatException e) {
                checkPeriod = DEFAULT_CHECK_PERIOD;
                _logger.write(toString(), Logger.WARNING, "Erronous WebFeeder.checkPeriod value in configuration using default of " + checkPeriod + " seconds");
            } catch (PropertyNotFoundException e) {
                checkPeriod = DEFAULT_CHECK_PERIOD;
                _logger.write(toString(), Logger.WARNING, "WebFeeder.checkPeriod value unavailable using default of " + checkPeriod + " seconds");
            }
            // wait for the check period
            try {
                Thread.sleep(checkPeriod * 1000);
            } catch (InterruptedException e) {
            }
            
            // get alerts directory
            String rootPath, alertSubDir, alertFileName;
            try {
                rootPath = cp.getProperty("WebFeeder", "WebFeeder.rootPath");
                alertSubDir = cp.getProperty("WebFeeder", "WebFeeder.alertSubDir");
                alertFileName = cp.getProperty("WebFeeder", "WebFeeder.alertFileName");
            } catch (PropertyNotFoundException e) {
                _logger.write(this.toString(), Logger.ERROR, "Failed to get config for Alert Data: "+e);
                // bail out
                continue;
            }
            
            // get the "age" barrier
            int deleteOlderThan = 0;
            try {
                deleteOlderThan = Integer.parseInt(cp.getProperty("WebFeeder", "WebFeeder.alertDeleteOlderThan"));
            } catch (NumberFormatException e) {
                deleteOlderThan = DEFAULT_AGE;
                _logger.write(toString(), Logger.WARNING, "Erronous WebFeeder.alertDeleteOlderThan value in configuration using default of " + deleteOlderThan + " seconds");
            } catch (PropertyNotFoundException e) {
                deleteOlderThan = DEFAULT_AGE;
                _logger.write(toString(), Logger.WARNING, "WebFeeder.alertDeleteOlderThan value unavailable using default of " + deleteOlderThan + " seconds");
            }
            
            // list the files and delete as appropriate
            File alertsDir = new File(rootPath, alertSubDir);
            File[] contents = alertsDir.listFiles();
            for(int i=0; i < contents.length; i++) {
                File hostdir = contents[i];
                if(hostdir.isDirectory()) {
                    File[] hostdirContents = hostdir.listFiles();
                    for(int j=0; j < hostdirContents.length; j++) {
                        File alertFile = hostdirContents[j];
                        String filename = alertFile.getName();
                        if(filename.endsWith(Alert.alertLevels[0]) ||
                           filename.endsWith(Alert.alertLevels[Alert.alertLevels.length-1])) {
                            // it ends with either OK or FINAL
                            // ... so we can check it for deletion
                            long lastModified = alertFile.lastModified();
                            long age = System.currentTimeMillis() - lastModified;
                            if(age > ((long) deleteOlderThan*1000)) {
                                // it's also older than our age to delete older than
                                if(!alertFile.delete()) {
                                    _logger.write(this.toString(), Logger.WARNING, "Failed to delete the following 'old' alert file: "+alertFile.getPath());
                                }
                            }
                        }
                    }
                }
            }
        }
    }
    
    /**
     * Handles an XMLPacket. This will write it out to disk
     * in an appropriate manner.
     *
     * @param packet the XMLPacket to write
     */
    public void receiveXMLPacket(XMLPacket packet) {
        String packetType = packet.getParam("packet.attributes.type");
        if(packetType == null || !packetType.equals("data")) {
            // bail out, without warning
            // this is probably a heartbeat or similar
            return;
        }
        // get config proxy
        ConfigurationProxy cp = ConfigurationProxy.getInstance();
        // get file locations
        String rootPath, latestSubDir, latestFileName;
        try {
            rootPath = cp.getProperty("WebFeeder", "WebFeeder.rootPath");
            latestSubDir = cp.getProperty("WebFeeder", "WebFeeder.latestSubDir");
            latestFileName = cp.getProperty("WebFeeder", "WebFeeder.latestFileName");
        } catch (PropertyNotFoundException e) {
            _logger.write(this.toString(), Logger.ERROR, "Failed to get config for Latest Data: "+e);
            // bail out
            return;
        }
        // get raw data
        String data = packet.printAll();
        String hostname = packet.getParam("packet.attributes.machine_name");
        // set paths
        File outDir = new File(rootPath, latestSubDir+sep+hostname);
        File outFile = new File(rootPath, latestSubDir+sep+hostname+sep+latestFileName);
        // write the data out
        writeData(outDir, outFile, data);
    }
    
    /**
     * Handles an Alert. This will write it out to disk
     * in an appropriate manner.
     *
     * @param alert the Alert object to write
     */
    public void receiveAlert(Alert alert) {
        // get config proxy
        ConfigurationProxy cp = ConfigurationProxy.getInstance();
        // get file locations
        String rootPath, alertSubDir, alertFileName;
        try {
            rootPath = cp.getProperty("WebFeeder", "WebFeeder.rootPath");
            alertSubDir = cp.getProperty("WebFeeder", "WebFeeder.alertSubDir");
            alertFileName = cp.getProperty("WebFeeder", "WebFeeder.alertFileName");
        } catch (PropertyNotFoundException e) {
            _logger.write(this.toString(), Logger.ERROR, "Failed to get config for Alert Data: "+e);
            // bail out
            return;
        }
        // get raw data
        String data = alert.printAll();
        String hostname = alert.getSource();
        // set paths
        File outDir = new File(rootPath, alertSubDir+sep+hostname);
        String destFile = alertSubDir+sep+hostname+sep+alertFileName+"."+String.valueOf(alert.getInitialAlertTime());
        File outFile;
        // check if we're at a special "end case" (OK or FINAL)
        if(alert.getLevel()==0 || alert.getLevel()==Alert.alertLevels.length-1) {
            File oldFile = new File(rootPath, destFile);
            outFile = new File(rootPath, destFile+"."+Alert.alertLevels[alert.getLevel()]);
            if(!oldFile.renameTo(outFile)) {
                _logger.write(this.toString(), Logger.WARNING, "Failed to rename old file, "+oldFile.getPath()+" to new file, "+outFile.getPath());
            }
        } else {
            outFile = new File(rootPath, destFile);
        }
        // write the data out
        writeData(outDir, outFile, data);
    }
    
    /**
     * 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.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---
    
    /**
     * Attempts to write "data" to "outFile" in "outDir".
     *
     * Performs checks to create the directories, and the file.
     * Does not "return" anything to indicate failure or success.
     *
     * @param outDir the directory to put the file in
     * @param outFile the filename to put the data in
     * @param data the String of data to write
     */
    private void writeData(File outDir, File outFile, String data) {
        // try to create directory
        if(!outDir.exists()) {
            if(!outDir.mkdirs()) {
                // didn't exist, and we couldn't make it
                _logger.write(this.toString(), Logger.ERROR, "Failed to create directory: "+outDir.getPath());
                // bail out
                return;
            }
        }
        // directory has been made, check file exists
        if(!outFile.exists()) {
            try {
                outFile.createNewFile();
            } catch (IOException e) {
                _logger.write(this.toString(), Logger.ERROR, "Failed to create file: "+e);
                // bail out
                return;
            }
        }
        // file should now exist
        if(outFile.canWrite()) {
            PrintWriter out;
            try {
                out = new PrintWriter(new FileWriter(outFile));
                out.println(data);
                out.close();
            } catch (IOException e) {
                _logger.write(this.toString(), Logger.ERROR, "Failed to write file: "+e);
            }
        }
        else {
            _logger.write(this.toString(), Logger.ERROR, "File not writeable: "+outFile.getPath());
        }
    }
    
    /**
     * Iterates through dir (a directory) and deletes
     * all files and subdirectories.
     *
     * @param dir the directory to clear
     * @return true if it succeeded
     */
    private boolean deleteContents(File dir) {
        boolean success = true;
        if(dir.isDirectory()) {
            // is a directory
            File[] contents = dir.listFiles();
            for(int i=0; i < contents.length; i++) {
                File sub = contents[i];
                if(sub.isDirectory()) {
                    // lets get recursive
                    success = success & deleteContents(sub);
                }
                // it's a file or empty dir
                success = success & sub.delete();
            }
        }
        else {
            // not a directory?
            success=false;
        }
        return success;
    }
        
//---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 = ClientMain.NAME;

    /**
     * This holds a reference to the
     * system logger that is being used.
     */
    private Logger _logger = ReferenceManager.getInstance().getLogger();
    
//---STATIC ATTRIBUTES---

    /**
     * A reference to the single instance of this class
     */
    private static WebFeeder _instance;

}
Revision:	1.14
Committed:	Fri Mar 16 16:43:50 2001 UTC (23 years, 3 months ago) by tdb
Branch:	MAIN
Changes since 1.13:	+13 -8 lines
Log Message:	Sorted the seperator character out :)
#	Content
1	//---PACKAGE DECLARATION---
2	package uk.org.iscream.client;
3
4	//---IMPORTS---
5	import uk.org.iscream.componentmanager.*;
6	import uk.org.iscream.core.*;
7	import uk.org.iscream.util.*;
8	import java.io.*;
9
10	/**
11	* Provides a feed to the webpage system.
12	*
13	* !! There may also be need to have a Thread to grab any
14	* !! required config (groups, "nice names, etc) and dump
15	* !! that to a file.
16	*
17	* @author $Author: tdb1 $
18	* @version $Id: WebFeeder.java,v 1.13 2001/03/16 02:40:04 tdb1 Exp $
19	*/
20	public class WebFeeder extends Thread {
21
22	//---FINAL ATTRIBUTES---
23
24	/**
25	* The current CVS revision of this class
26	*/
27	public static final String REVISION = "$Revision: 1.13 $";
28
29	/**
30	* Default check period in seconds (30 minutes)
31	*/
32	public final int DEFAULT_CHECK_PERIOD = 1800;
33
34	/**
35	* Delete alerts older than this in seconds, default.
36	*/
37	public final int DEFAULT_AGE = 3600;
38
39	/**
40	* The default path seperator, here for convienience
41	*/
42	private final String sep = File.separator;
43
44	//---STATIC METHODS---
45
46	/**
47	* Return a reference to the single class.
48	* Construct it if it does not already exist, otherwise just return the reference.
49	*/
50	public static WebFeeder getInstance() {
51	if (_instance == null){
52	_instance = new WebFeeder();
53	}
54	return _instance;
55	}
56
57	//---CONSTRUCTORS---
58
59	/**
60	* Construct a new WebFeeder. This will also wipe out any
61	* old Alerts, as these can't be carried from one session
62	* until the next.
63	*/
64	private WebFeeder() {
65	// do something, or nothing.. but must be private
66	// don't need to cleanup latest data
67
68	// -- cleanup old alerts
69	// get config proxy
70	ConfigurationProxy cp = ConfigurationProxy.getInstance();
71	// get file locations
72	String rootPath, alertSubDir, alertFileName;
73	try {
74	// work out where things are
75	rootPath = cp.getProperty("WebFeeder", "WebFeeder.rootPath");
76	alertSubDir = cp.getProperty("WebFeeder", "WebFeeder.alertSubDir");
77	File alertsDir = new File(rootPath, alertSubDir);
78	if(deleteContents(alertsDir)) {
79	_logger.write(this.toString(), Logger.DEBUG, "Deleted all files and directories from: "+rootPath+sep+alertSubDir);
80	} else {
81	_logger.write(this.toString(), Logger.WARNING, "Failed to delete all files and directories from: "+rootPath+sep+alertSubDir);
82	}
83	// cleanup complete
84	} catch (PropertyNotFoundException e) {
85	_logger.write(this.toString(), Logger.ERROR, "Failed to cleanup on construction, due to failing to get config for Alert Data: "+e);
86	// just leave it at that
87	}
88
89	// set our name and startup
90	setName("client.WebFeeder");
91	start();
92	}
93
94	//---PUBLIC METHODS---
95
96	/**
97	* Thread loop, will check at intervals for any files
98	* that need to be "cleaned up". This will normally
99	* be OK and FINAL alerts that have been around for longer
100	* than a specified period of time.
101	*/
102	public void run() {
103	boolean running = true;
104	// get config proxy
105	ConfigurationProxy cp = ConfigurationProxy.getInstance();
106	// loop round
107	while(running) {
108	// get our check period
109	int checkPeriod = 0;
110	try {
111	checkPeriod = Integer.parseInt(cp.getProperty("WebFeeder", "WebFeeder.checkPeriod"));
112	} catch (NumberFormatException e) {
113	checkPeriod = DEFAULT_CHECK_PERIOD;
114	_logger.write(toString(), Logger.WARNING, "Erronous WebFeeder.checkPeriod value in configuration using default of " + checkPeriod + " seconds");
115	} catch (PropertyNotFoundException e) {
116	checkPeriod = DEFAULT_CHECK_PERIOD;
117	_logger.write(toString(), Logger.WARNING, "WebFeeder.checkPeriod value unavailable using default of " + checkPeriod + " seconds");
118	}
119	// wait for the check period
120	try {
121	Thread.sleep(checkPeriod * 1000);
122	} catch (InterruptedException e) {
123	}
124
125	// get alerts directory
126	String rootPath, alertSubDir, alertFileName;
127	try {
128	rootPath = cp.getProperty("WebFeeder", "WebFeeder.rootPath");
129	alertSubDir = cp.getProperty("WebFeeder", "WebFeeder.alertSubDir");
130	alertFileName = cp.getProperty("WebFeeder", "WebFeeder.alertFileName");
131	} catch (PropertyNotFoundException e) {
132	_logger.write(this.toString(), Logger.ERROR, "Failed to get config for Alert Data: "+e);
133	// bail out
134	continue;
135	}
136
137	// get the "age" barrier
138	int deleteOlderThan = 0;
139	try {
140	deleteOlderThan = Integer.parseInt(cp.getProperty("WebFeeder", "WebFeeder.alertDeleteOlderThan"));
141	} catch (NumberFormatException e) {
142	deleteOlderThan = DEFAULT_AGE;
143	_logger.write(toString(), Logger.WARNING, "Erronous WebFeeder.alertDeleteOlderThan value in configuration using default of " + deleteOlderThan + " seconds");
144	} catch (PropertyNotFoundException e) {
145	deleteOlderThan = DEFAULT_AGE;
146	_logger.write(toString(), Logger.WARNING, "WebFeeder.alertDeleteOlderThan value unavailable using default of " + deleteOlderThan + " seconds");
147	}
148
149	// list the files and delete as appropriate
150	File alertsDir = new File(rootPath, alertSubDir);
151	File[] contents = alertsDir.listFiles();
152	for(int i=0; i < contents.length; i++) {
153	File hostdir = contents[i];
154	if(hostdir.isDirectory()) {
155	File[] hostdirContents = hostdir.listFiles();
156	for(int j=0; j < hostdirContents.length; j++) {
157	File alertFile = hostdirContents[j];
158	String filename = alertFile.getName();
159	if(filename.endsWith(Alert.alertLevels[0]) \|\|
160	filename.endsWith(Alert.alertLevels[Alert.alertLevels.length-1])) {
161	// it ends with either OK or FINAL
162	// ... so we can check it for deletion
163	long lastModified = alertFile.lastModified();
164	long age = System.currentTimeMillis() - lastModified;
165	if(age > ((long) deleteOlderThan*1000)) {
166	// it's also older than our age to delete older than
167	if(!alertFile.delete()) {
168	_logger.write(this.toString(), Logger.WARNING, "Failed to delete the following 'old' alert file: "+alertFile.getPath());
169	}
170	}
171	}
172	}
173	}
174	}
175	}
176	}
177
178	/**
179	* Handles an XMLPacket. This will write it out to disk
180	* in an appropriate manner.
181	*
182	* @param packet the XMLPacket to write
183	*/
184	public void receiveXMLPacket(XMLPacket packet) {
185	String packetType = packet.getParam("packet.attributes.type");
186	if(packetType == null \|\| !packetType.equals("data")) {
187	// bail out, without warning
188	// this is probably a heartbeat or similar
189	return;
190	}
191	// get config proxy
192	ConfigurationProxy cp = ConfigurationProxy.getInstance();
193	// get file locations
194	String rootPath, latestSubDir, latestFileName;
195	try {
196	rootPath = cp.getProperty("WebFeeder", "WebFeeder.rootPath");
197	latestSubDir = cp.getProperty("WebFeeder", "WebFeeder.latestSubDir");
198	latestFileName = cp.getProperty("WebFeeder", "WebFeeder.latestFileName");
199	} catch (PropertyNotFoundException e) {
200	_logger.write(this.toString(), Logger.ERROR, "Failed to get config for Latest Data: "+e);
201	// bail out
202	return;
203	}
204	// get raw data
205	String data = packet.printAll();
206	String hostname = packet.getParam("packet.attributes.machine_name");
207	// set paths
208	File outDir = new File(rootPath, latestSubDir+sep+hostname);
209	File outFile = new File(rootPath, latestSubDir+sep+hostname+sep+latestFileName);
210	// write the data out
211	writeData(outDir, outFile, data);
212	}
213
214	/**
215	* Handles an Alert. This will write it out to disk
216	* in an appropriate manner.
217	*
218	* @param alert the Alert object to write
219	*/
220	public void receiveAlert(Alert alert) {
221	// get config proxy
222	ConfigurationProxy cp = ConfigurationProxy.getInstance();
223	// get file locations
224	String rootPath, alertSubDir, alertFileName;
225	try {
226	rootPath = cp.getProperty("WebFeeder", "WebFeeder.rootPath");
227	alertSubDir = cp.getProperty("WebFeeder", "WebFeeder.alertSubDir");
228	alertFileName = cp.getProperty("WebFeeder", "WebFeeder.alertFileName");
229	} catch (PropertyNotFoundException e) {
230	_logger.write(this.toString(), Logger.ERROR, "Failed to get config for Alert Data: "+e);
231	// bail out
232	return;
233	}
234	// get raw data
235	String data = alert.printAll();
236	String hostname = alert.getSource();
237	// set paths
238	File outDir = new File(rootPath, alertSubDir+sep+hostname);
239	String destFile = alertSubDir+sep+hostname+sep+alertFileName+"."+String.valueOf(alert.getInitialAlertTime());
240	File outFile;
241	// check if we're at a special "end case" (OK or FINAL)
242	if(alert.getLevel()==0 \|\| alert.getLevel()==Alert.alertLevels.length-1) {
243	File oldFile = new File(rootPath, destFile);
244	outFile = new File(rootPath, destFile+"."+Alert.alertLevels[alert.getLevel()]);
245	if(!oldFile.renameTo(outFile)) {
246	_logger.write(this.toString(), Logger.WARNING, "Failed to rename old file, "+oldFile.getPath()+" to new file, "+outFile.getPath());
247	}
248	} else {
249	outFile = new File(rootPath, destFile);
250	}
251	// write the data out
252	writeData(outDir, outFile, data);
253	}
254
255	/**
256	* Overrides the {@link java.lang.Object#toString() Object.toString()}
257	* method to provide clean logging (every class should have this).
258	*
259	* This uses the uk.org.iscream.util.FormatName class
260	* to format the toString()
261	*
262	* @return the name of this class and its CVS revision
263	*/
264	public String toString() {
265	return FormatName.getName(
266	_name,
267	getClass().getName(),
268	REVISION);
269	}
270
271	//---PRIVATE METHODS---
272
273	/**
274	* Attempts to write "data" to "outFile" in "outDir".
275	*
276	* Performs checks to create the directories, and the file.
277	* Does not "return" anything to indicate failure or success.
278	*
279	* @param outDir the directory to put the file in
280	* @param outFile the filename to put the data in
281	* @param data the String of data to write
282	*/
283	private void writeData(File outDir, File outFile, String data) {
284	// try to create directory
285	if(!outDir.exists()) {
286	if(!outDir.mkdirs()) {
287	// didn't exist, and we couldn't make it
288	_logger.write(this.toString(), Logger.ERROR, "Failed to create directory: "+outDir.getPath());
289	// bail out
290	return;
291	}
292	}
293	// directory has been made, check file exists
294	if(!outFile.exists()) {
295	try {
296	outFile.createNewFile();
297	} catch (IOException e) {
298	_logger.write(this.toString(), Logger.ERROR, "Failed to create file: "+e);
299	// bail out
300	return;
301	}
302	}
303	// file should now exist
304	if(outFile.canWrite()) {
305	PrintWriter out;
306	try {
307	out = new PrintWriter(new FileWriter(outFile));
308	out.println(data);
309	out.close();
310	} catch (IOException e) {
311	_logger.write(this.toString(), Logger.ERROR, "Failed to write file: "+e);
312	}
313	}
314	else {
315	_logger.write(this.toString(), Logger.ERROR, "File not writeable: "+outFile.getPath());
316	}
317	}
318
319	/**
320	* Iterates through dir (a directory) and deletes
321	* all files and subdirectories.
322	*
323	* @param dir the directory to clear
324	* @return true if it succeeded
325	*/
326	private boolean deleteContents(File dir) {
327	boolean success = true;
328	if(dir.isDirectory()) {
329	// is a directory
330	File[] contents = dir.listFiles();
331	for(int i=0; i < contents.length; i++) {
332	File sub = contents[i];
333	if(sub.isDirectory()) {
334	// lets get recursive
335	success = success & deleteContents(sub);
336	}
337	// it's a file or empty dir
338	success = success & sub.delete();
339	}
340	}
341	else {
342	// not a directory?
343	success=false;
344	}
345	return success;
346	}
347
348	//---ACCESSOR/MUTATOR METHODS---
349
350	//---ATTRIBUTES---
351
352	/**
353	* This is the friendly identifier of the
354	* component this class is running in.
355	* eg, a Filter may be called "filter1",
356	* If this class does not have an owning
357	* component, a name from the configuration
358	* can be placed here. This name could also
359	* be changed to null for utility classes.
360	*/
361	private String _name = ClientMain.NAME;
362
363	/**
364	* This holds a reference to the
365	* system logger that is being used.
366	*/
367	private Logger _logger = ReferenceManager.getInstance().getLogger();
368
369	//---STATIC ATTRIBUTES---
370
371	/**
372	* A reference to the single instance of this class
373	*/
374	private static WebFeeder _instance;
375
376	}