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1
5 package com.tonbeller.wcf.utils;
6
7 import java.io.File  ;
8 import java.util.Iterator ;
9 import java.util.LinkedList ;
10 import java.util.List ;
11
12 import javax.servlet.http.HttpSession ;
13 import javax.servlet.http.HttpSessionBindingEvent ;
14 import javax.servlet.http.HttpSessionBindingListener ;
15
16 import org.apache.log4j.Logger;
17
18
23 public class SessionTempFileDeleter implements TempFileDeleter, HttpSessionBindingListener {
24 List files = new LinkedList ();
25 private static final String WEBKEY = SessionTempFileDeleter.class.getName();
26 private static final Logger logger = Logger.getLogger(SessionTempFileDeleter.class);
27
28 private SessionTempFileDeleter () {
29 }
30
31 public static TempFileDeleter instance(HttpSession session) {
32 TempFileDeleter tfd = (TempFileDeleter) session.getAttribute(WEBKEY);
33 if (tfd == null) {
34 tfd = new SessionTempFileDeleter();
35 session.setAttribute(WEBKEY, tfd);
36 }
37 return tfd;
38 }
39
40 public void register(File f) {
41 files.add(f);
42 if (logger.isInfoEnabled())
43 logger.info("registering file for deletion: " + f);
44 }
45
46 public void valueBound(HttpSessionBindingEvent arg0) {
47 }
48
49 public void valueUnbound(HttpSessionBindingEvent arg0) {
50 for (Iterator it = files.iterator(); it.hasNext(); ) {
51 File f = (File ) it.next();
52 try {
53 f.delete();
54 } catch (Exception e) {
55 logger.error(null, e);
56 }
57 }
58 }
59 }
60 |
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