[blam] ItemList: change save semantics not to restart the timer

[Carlos Martín Nieto <cmartin src gnome org>]

commit 62f28885734dc3b7eb965414a8e1169a01ebf74d
Author: Carlos Martín Nieto <cmn dwim me>
Date:   Sat Jun 15 15:25:19 2013 +0200

    ItemList: change save semantics not to restart the timer
    
    Switch the databse save semantics from restarting the timer every time
    something is changed to batching updates in five-minute blocks. If the
    delayed task already exists, we let it write out our updates as well.

 src/ChannelCollection.cs |   17 +++++------------
 1 files changed, 5 insertions(+), 12 deletions(-)
---
diff --git a/src/ChannelCollection.cs b/src/ChannelCollection.cs
index fb3965f..ae7ea97 100644
--- a/src/ChannelCollection.cs
+++ b/src/ChannelCollection.cs
@@ -31,8 +31,6 @@ namespace Imendio.Blam {
 
        private Object clock = new Object();
        Task DelayedWrite;
-       CancellationTokenSource DelayedWriteCancellation = new CancellationTokenSource();
-
 
        private static uint WRITE_TIMEOUT = 5 * 60 * 1000; // Every 5 minutes
        
@@ -263,20 +261,15 @@ namespace Imendio.Blam {
                                });
                }
 
-               // TODO: this keeps the old semantics of restarting the timer, but we
-               // might want to simply see if we should start one and not do anything
-               // if there's already a task enqueued.
-               private void MarkAsDirty()
+
+               void MarkAsDirty()
                {
                        if (DelayedWrite != null && !DelayedWrite.IsCompleted)
-                               DelayedWriteCancellation.Cancel();
+                               return;
 
-                       DelayedWriteCancellation = new CancellationTokenSource();
-                       DelayedWrite = Task.Delay(TimeSpan.FromMilliseconds(WRITE_TIMEOUT), 
DelayedWriteCancellation.Token);
+                       DelayedWrite = Task.Delay(TimeSpan.FromMilliseconds(WRITE_TIMEOUT));
                        DelayedWrite.ContinueWith(task => {
-                               if (task.IsCanceled)
-                                       return;
-
+                               Console.WriteLine("writing data to disc");
                                SaveToFile();
                                ItemStore.Save();
                        });