beagled/InformationalMessagesRequestExecutor.cs

   1 //
   2 // InformationalMessagesRequestExecutor.cs
   3 //
   4 // Copyright (C) 2006 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
  29 using Beagle.Util;
  30
  31 namespace Beagle.Daemon {
  32
  33         [RequestMessage (typeof (Beagle.InformationalMessagesRequest))]
  34         public class InformationalMessagesRequestExecutor : RequestMessageExecutor {
  35
  36                 private InformationalMessagesRequest info_request;
  37                 private IndexingStatus crawl_status = IndexingStatus.NotRunning;
  38
  39                 public override ResponseMessage Execute (RequestMessage req)
  40                 {
  41                         this.info_request = (InformationalMessagesRequest) req;
  42
  43                         if (QueryDriver.IsIndexing)
  44                                 SendIndexingStatusResponse (IndexingStatus.Running);
  45
  46                         QueryDriver.ChangedEvent += OnQueryDriverChanged;
  47
  48                         // Don't send a response; we'll be sending them async.
  49                         return null;
  50                 }
  51
  52                 public override void Cleanup ()
  53                 {
  54                         QueryDriver.ChangedEvent -= OnQueryDriverChanged;
  55                 }
  56
  57                 private void OnQueryDriverChanged (Queryable queryable, IQueryableChangeData change_data)
  58                 {
  59                         bool is_indexing = QueryDriver.IsIndexing;
  60
  61                         if (is_indexing && crawl_status == IndexingStatus.NotRunning)
  62                                 SendIndexingStatusResponse (IndexingStatus.Running);
  63                         else if (! is_indexing && crawl_status == IndexingStatus.Running)
  64                                 SendIndexingStatusResponse (IndexingStatus.NotRunning);
  65                 }
  66
  67                 private void SendIndexingStatusResponse (IndexingStatus status)
  68                 {
  69                         Log.Debug ("Sending indexing status change from {0} to {1}", crawl_status, status);
  70                         this.crawl_status = status;
  71                         this.SendAsyncResponse (new IndexingStatusResponse (status));
  72                 }
  73         }
  74 }