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