beagled/GaimLogQueryable/GaimLogCrawler.cs

   1 //
   2 // GaimLogCrawler.cs
   3 //
   4 // Copyright (C) 2005 Novell, Inc.
   5 //
   6
   7 //
   8 // Permission is hereby granted, free of charge, to any person obtaining a
   9 // copy of this software and associated documentation files (the "Software"),
  10 // to deal in the Software without restriction, including without limitation
  11 // the rights to use, copy, modify, merge, publish, distribute, sublicense,
  12 // and/or sell copies of the Software, and to permit persons to whom the
  13 // Software is furnished to do so, subject to the following conditions:
  14 //
  15 // The above copyright notice and this permission notice shall be included in
  16 // all copies or substantial portions of the Software.
  17 //
  18 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  21 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  22 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  23 // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  24 // DEALINGS IN THE SOFTWARE.
  25 //
  26
  27 using System;
  28 using System.Collections;
  29 using System.IO;
  30
  31 using Beagle.Util;
  32 using Beagle.Daemon;
  33
  34 namespace Beagle.Daemon.GaimLogQueryable {
  35
  36         class GaimLogCrawler {
  37
  38                 string log_dir;
  39
  40                 Hashtable last_write_time_cache = new Hashtable ();
  41
  42                 ArrayList log_files = new ArrayList ();
  43
  44                 public GaimLogCrawler (string log_dir)
  45                 {
  46                         this.log_dir = log_dir;
  47                 }
  48
  49                 private bool FileIsInteresting (FileInfo file)
  50                 {
  51                         DateTime cached_time = new DateTime ();
  52                         if (last_write_time_cache.Contains (file.FullName))
  53                                 cached_time = (DateTime) last_write_time_cache [file.FullName];
  54
  55                         last_write_time_cache [file.FullName] = file.LastWriteTime;
  56
  57                         return cached_time < file.LastWriteTime;
  58                 }
  59
  60                 public void Crawl ()
  61                 {
  62                         log_files.Clear ();
  63
  64                         Queue pending = new Queue ();
  65
  66                         pending.Enqueue (log_dir);
  67
  68                         while (pending.Count > 0) {
  69
  70                                 string dir = (string) pending.Dequeue ();
  71
  72                                 foreach (string subdir in DirectoryWalker.GetDirectories (dir))
  73                                         pending.Enqueue (subdir);
  74
  75                                 foreach (FileInfo file in DirectoryWalker.GetFileInfos (dir)) {
  76                                         if (FileIsInteresting (file))
  77                                                 log_files.Add (file);
  78                                 }
  79                         }
  80                 }
  81
  82                 public ICollection Logs {
  83                         get { return log_files; }
  84                 }
  85         }
  86 }