beagled/LabyrinthQueryable/LabyrinthQueryable.cs

   1 //
   2 // LabyrithQueryable.cs
   3 //
   4 // Copyright (C) 2006 Kevin Kubasik <kevin@kubasik.net>
   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 using System.Threading;
  31 using System.Text;
  32
  33 using Beagle.Daemon;
  34 using Beagle.Util;
  35
  36 namespace Beagle.Daemon.LabyrinthQueryable {
  37
  38         [QueryableFlavor (Name="Labyrinth", Domain=QueryDomain.Local, RequireInotify=false)]
  39         public class LabyrinthQueryable  : LuceneFileQueryable, IIndexableGenerator {
  40
  41                 private static Logger log = Logger.Get ("LabyrinthQueryable");
  42
  43
  44                 string lab_dir;
  45
  46                 public LabyrinthQueryable () : base ("LabyrinthIndex")
  47                 {
  48                         lab_dir = Path.Combine (PathFinder.HomeDir, ".gnome2");
  49                         lab_dir = Path.Combine (lab_dir, "labyrinth");
  50                 }
  51
  52                 /////////////////////////////////////////////////
  53
  54                 private void StartWorker()
  55                 {
  56                         if (! Directory.Exists (lab_dir)) {
  57                                 GLib.Timeout.Add (60000, new GLib.TimeoutHandler (CheckForExistence));
  58                                 return;
  59                         }
  60
  61                         log.Info ("Starting Labyrinth backend");
  62
  63                         Stopwatch stopwatch = new Stopwatch ();
  64                         stopwatch.Start ();
  65
  66
  67
  68                         if (Inotify.Enabled)
  69                                 Inotify.Subscribe (lab_dir, OnInotifyNewNote, Inotify.EventType.CloseWrite | Inotify.EventType.Modify);
  70
  71                         Scheduler.Task task;
  72                         task = NewAddTask (this);
  73                         task.Tag = "Crawling Labyrinth Notes";
  74                         task.Source = this;
  75
  76                         ThisScheduler.Add (task);
  77
  78                         stopwatch.Stop ();
  79
  80                         log.Info ("labyrinth backend worker thread done in {0}", stopwatch);
  81                 }
  82
  83                 public override void Start ()
  84                 {
  85                         base.Start ();
  86
  87                         ExceptionHandlingThread.Start (new ThreadStart (StartWorker));
  88                 }
  89
  90                 /////////////////////////////////////////////////
  91
  92
  93                 public string StatusName {
  94                         get { return "LabyrinthQueryable"; }
  95                 }
  96
  97                 private IEnumerator map_files = null;
  98
  99                 public void PostFlushHook () { }
 100
 101                 public bool HasNextIndexable ()
 102                 {
 103                         if (map_files == null)
 104                                 map_files = DirectoryWalker.GetFileInfos (lab_dir).GetEnumerator ();
 105
 106                         return map_files.MoveNext ();
 107                 }
 108
 109                 public Indexable GetNextIndexable ()
 110                 {
 111                         FileInfo file = (FileInfo) map_files.Current;
 112
 113                         if (! file.Exists)
 114                                 return null;
 115
 116                         if (IsUpToDate (file.FullName))
 117                                 return null;
 118
 119                         Indexable indexable = NoteToIndexable (file);
 120
 121                         return indexable;
 122                 }
 123                 private bool CheckForExistence ()
 124                 {
 125                         if (!Directory.Exists (lab_dir))
 126                                 return true;
 127
 128                         this.Start ();
 129
 130                         return false;
 131                 }
 132                 /////////////////////////////////////////////////
 133
 134                 private static Indexable NoteToIndexable (FileInfo file)
 135                 {
 136                         Indexable indexable = new Indexable (UriFu.PathToFileUri(file.FullName));
 137                         indexable.Timestamp = file.LastWriteTimeUtc;
 138                         indexable.HitType = "Note";
 139                         indexable.MimeType = "x-beagle/x-labyrinth-note";
 140                         indexable.AddProperty (Property.NewUnsearched ("fixme:application","labyrinth"));
 141
 142                         return indexable;
 143
 144                 }
 145                 private void IndexNote (FileInfo file, Scheduler.Priority priority)
 146                 {
 147
 148                         if (! File.Exists (file.FullName))
 149                                 return;
 150
 151                         if (IsUpToDate (file.FullName))
 152                                 return;
 153
 154                         Indexable indexable = NoteToIndexable (file);
 155                         Scheduler.Task task = NewAddTask (indexable);
 156                         task.Priority = priority;
 157                         task.SubPriority = 0;
 158                         ThisScheduler.Add (task);
 159
 160                 }
 161
 162
 163                 /////////////////////////////////////////////////
 164
 165
 166                 private void OnInotifyNewNote(Inotify.Watch watch,
 167                                                 string path, string subitem, string srcpath,
 168                                                 Inotify.EventType type)
 169                 {
 170                         if (subitem.Length == 0 || (type & Inotify.EventType.IsDirectory) != 0)
 171                                 return;
 172
 173                         if ( subitem.EndsWith("map"))
 174                                 IndexNote (new FileInfo(Path.Combine (path, subitem)), Scheduler.Priority.Immediate);
 175                 }
 176
 177                 /////////////////////////////////////////////////
 178
 179
 180         }
 181 }
 182