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root/i-scream/projects/cms/source/server/uk/org/iscream/cms/server/client/WebFeeder.java

Comparing projects/cms/source/server/uk/org/iscream/cms/server/client/WebFeeder.java (file contents):
Revision 1.2 by tdb, Thu Mar 8 20:57:35 2001 UTC vs.
Revision 1.15 by tdb, Fri Mar 16 16:47:33 2001 UTC

#	Line 1 | Line 1
1		//---PACKAGE DECLARATION---
2	<	package uk.ac.ukc.iscream.client;
2	>	package uk.org.iscream.client;
3
4		//---IMPORTS---
5	<	import uk.ac.ukc.iscream.componentmanager.*;
6	<	import uk.ac.ukc.iscream.core.*;
7	<	import uk.ac.ukc.iscream.util.*;
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  $Author$
18		* @version $Id$
19		*/
20	<	public class WebFeeder {
20	>	public class WebFeeder extends Thread {
21
22		//---FINAL ATTRIBUTES---
23
#	Line 22 | Line 26 | public class WebFeeder {
26		*/
27		public static final String REVISION = "$Revision$";
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		/**
#	Line 36 | Line 55 | public class WebFeeder {
55		}
56
57		//---CONSTRUCTORS---
58	<
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	<	// TO BE COMPLETED
97	<	// The following two methods should process and save
98	<	// XMLPackets and Alerts, in a directory structure that
99	<	// has been defined by the web page designer.
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	>	// get all the hostnames directories
152	>	File[] contents = alertsDir.listFiles();
153	>	for(int i=0; i < contents.length; i++) {
154	>	// get a single directory from the array..
155	>	File hostdir = contents[i];
156	>	// ..and check it's a directory
157	>	if(hostdir.isDirectory()) {
158	>	// get all the contents of that directory
159	>	File[] hostdirContents = hostdir.listFiles();
160	>	for(int j=0; j < hostdirContents.length; j++) {
161	>	File alertFile = hostdirContents[j];
162	>	// get the filename..
163	>	String filename = alertFile.getName();
164	>	// ..and see if it ends with OK or FINAL
165	>	if(filename.endsWith(Alert.alertLevels[0]) ||
166	>	filename.endsWith(Alert.alertLevels[Alert.alertLevels.length-1])) {
167	>	// it does end with either OK or FINAL
168	>	// ... so we can check it for deletion
169	>	long lastModified = alertFile.lastModified();
170	>	long age = System.currentTimeMillis() - lastModified;
171	>	if(age > ((long) deleteOlderThan*1000)) {
172	>	// it's also older than our age to delete older than
173	>	if(!alertFile.delete()) {
174	>	_logger.write(this.toString(), Logger.WARNING, "Failed to delete the following 'old' alert file: "+alertFile.getPath());
175	>	}
176	>	}
177	>	}
178	>	}
179	>	}
180	>	}
181	>	}
182	>	}
183
184	<	// There may also be need to have a Thread to grab any
185	<	// required config (groups, "nice names, etc) and dump
186	<	// that to a file.
187	<
184	>	/**
185	>	* Handles an XMLPacket. This will write it out to disk
186	>	* in an appropriate manner.
187	>	*
188	>	* @param packet the XMLPacket to write
189	>	*/
190		public void receiveXMLPacket(XMLPacket packet) {
191	+	String packetType = packet.getParam("packet.attributes.type");
192	+	if(packetType == null || !packetType.equals("data")) {
193	+	// bail out, without warning
194	+	// this is probably a heartbeat or similar
195	+	return;
196	+	}
197		// get config proxy
198		ConfigurationProxy cp = ConfigurationProxy.getInstance();
199		// get file locations
#	Line 68 | Line 209 | public class WebFeeder {
209		}
210		// get raw data
211		String data = packet.printAll();
212	<	String hostname = packet.getParam("packet.attributes.host_name");
212	>	String hostname = packet.getParam("packet.attributes.machine_name");
213		// set paths
214	<	String destDir = rootPath+"/"+latestSubDir+"/"+hostname;
215	<	String destFile = destDir+"/"+latestFileName;
216	<	// write data
217	<	File outDir = new File(destDir);
77	<	if(outDir.mkdirs()) {
78	<	File outFile = new File(destFile);
79	<	if(outFile.canWrite()) {
80	<	PrintWriter out;
81	<	try {
82	<	out = new PrintWriter(new FileWriter(outFile));
83	<	out.println(data);
84	<	out.close();
85	<	} catch (IOException e) {
86	<	_logger.write(this.toString(), Logger.ERROR, "Failed to write file: "+e);
87	<	}
88	<	}
89	<	else {
90	<	_logger.write(this.toString(), Logger.ERROR, "File not readable: "+outFile.getPath());
91	<	}
92	<	}
93	<	else {
94	<	_logger.write(this.toString(), Logger.ERROR, "Failed to create directory: "+outDir.getPath());
95	<	}
214	>	File outDir = new File(rootPath, latestSubDir+sep+hostname);
215	>	File outFile = new File(rootPath, latestSubDir+sep+hostname+sep+latestFileName);
216	>	// write the data out
217	>	writeData(outDir, outFile, data);
218		}
219
220	+	/**
221	+	* Handles an Alert. This will write it out to disk
222	+	* in an appropriate manner.
223	+	*
224	+	* @param alert the Alert object to write
225	+	*/
226		public void receiveAlert(Alert alert) {
227	<	// process and save
227	>	// get config proxy
228	>	ConfigurationProxy cp = ConfigurationProxy.getInstance();
229	>	// get file locations
230	>	String rootPath, alertSubDir, alertFileName;
231	>	try {
232	>	rootPath = cp.getProperty("WebFeeder", "WebFeeder.rootPath");
233	>	alertSubDir = cp.getProperty("WebFeeder", "WebFeeder.alertSubDir");
234	>	alertFileName = cp.getProperty("WebFeeder", "WebFeeder.alertFileName");
235	>	} catch (PropertyNotFoundException e) {
236	>	_logger.write(this.toString(), Logger.ERROR, "Failed to get config for Alert Data: "+e);
237	>	// bail out
238	>	return;
239	>	}
240	>	// get raw data
241	>	String data = alert.printAll();
242	>	String hostname = alert.getSource();
243	>	// set paths
244	>	File outDir = new File(rootPath, alertSubDir+sep+hostname);
245	>	String destFile = alertSubDir+sep+hostname+sep+alertFileName+"."+String.valueOf(alert.getInitialAlertTime());
246	>	File outFile;
247	>	// check if we're at a special "end case" (OK or FINAL)
248	>	if(alert.getLevel()==0 || alert.getLevel()==Alert.alertLevels.length-1) {
249	>	File oldFile = new File(rootPath, destFile);
250	>	outFile = new File(rootPath, destFile+"."+Alert.alertLevels[alert.getLevel()]);
251	>	if(!oldFile.renameTo(outFile)) {
252	>	_logger.write(this.toString(), Logger.WARNING, "Failed to rename old file, "+oldFile.getPath()+" to new file, "+outFile.getPath());
253	>	}
254	>	} else {
255	>	outFile = new File(rootPath, destFile);
256	>	}
257	>	// write the data out
258	>	writeData(outDir, outFile, data);
259		}
260
261		/**
262		* Overrides the {@link java.lang.Object#toString() Object.toString()}
263		* method to provide clean logging (every class should have this).
264		*
265	<	* This uses the uk.ac.ukc.iscream.util.FormatName class
265	>	* This uses the uk.org.iscream.util.FormatName class
266		* to format the toString()
267		*
268		* @return the name of this class and its CVS revision
#	Line 116 | Line 275 | public class WebFeeder {
275		}
276
277		//---PRIVATE METHODS---
278	<
278	>
279	>	/**
280	>	* Attempts to write "data" to "outFile" in "outDir".
281	>	*
282	>	* Performs checks to create the directories, and the file.
283	>	* Does not "return" anything to indicate failure or success.
284	>	*
285	>	* @param outDir the directory to put the file in
286	>	* @param outFile the filename to put the data in
287	>	* @param data the String of data to write
288	>	*/
289	>	private void writeData(File outDir, File outFile, String data) {
290	>	// try to create directory
291	>	if(!outDir.exists()) {
292	>	if(!outDir.mkdirs()) {
293	>	// didn't exist, and we couldn't make it
294	>	_logger.write(this.toString(), Logger.ERROR, "Failed to create directory: "+outDir.getPath());
295	>	// bail out
296	>	return;
297	>	}
298	>	}
299	>	// directory has been made, check file exists
300	>	if(!outFile.exists()) {
301	>	try {
302	>	outFile.createNewFile();
303	>	} catch (IOException e) {
304	>	_logger.write(this.toString(), Logger.ERROR, "Failed to create file: "+e);
305	>	// bail out
306	>	return;
307	>	}
308	>	}
309	>	// file should now exist
310	>	if(outFile.canWrite()) {
311	>	PrintWriter out;
312	>	try {
313	>	out = new PrintWriter(new FileWriter(outFile));
314	>	out.println(data);
315	>	out.close();
316	>	} catch (IOException e) {
317	>	_logger.write(this.toString(), Logger.ERROR, "Failed to write file: "+e);
318	>	}
319	>	}
320	>	else {
321	>	_logger.write(this.toString(), Logger.ERROR, "File not writeable: "+outFile.getPath());
322	>	}
323	>	}
324	>
325	>	/**
326	>	* Iterates through dir (a directory) and deletes
327	>	* all files and subdirectories.
328	>	*
329	>	* @param dir the directory to clear
330	>	* @return true if it succeeded
331	>	*/
332	>	private boolean deleteContents(File dir) {
333	>	boolean success = true;
334	>	if(dir.isDirectory()) {
335	>	// is a directory
336	>	File[] contents = dir.listFiles();
337	>	for(int i=0; i < contents.length; i++) {
338	>	File sub = contents[i];
339	>	if(sub.isDirectory()) {
340	>	// lets get recursive
341	>	success = success & deleteContents(sub);
342	>	}
343	>	// it's a file or empty dir
344	>	success = success & sub.delete();
345	>	}
346	>	}
347	>	else {
348	>	// not a directory?
349	>	success=false;
350	>	}
351	>	return success;
352	>	}
353	>
354		//---ACCESSOR/MUTATOR METHODS---
355
356		//---ATTRIBUTES---

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