[rygel/rygel-0-12] tracker: Cache ContainerUpdateID

[Jens Georg <jensgeorg src gnome org>]

commit 02c3f88503e89e1742cac7c7f358b0ffa80cc7e2
Author: Jens Georg <mail jensge org>
Date:   Thu Nov 10 11:31:29 2011 +0100

    tracker: Cache ContainerUpdateID
    
    Fixes DLNA Testcase 7.3.56.1

 .../tracker/rygel-tracker-search-container.vala    |   16 ++++++++++++++++
 1 files changed, 16 insertions(+), 0 deletions(-)
---
diff --git a/src/plugins/tracker/rygel-tracker-search-container.vala b/src/plugins/tracker/rygel-tracker-search-container.vala
index c3762d9..bef5733 100644
--- a/src/plugins/tracker/rygel-tracker-search-container.vala
+++ b/src/plugins/tracker/rygel-tracker-search-container.vala
@@ -41,6 +41,8 @@ public class Rygel.Tracker.SearchContainer : SimpleContainer {
 
     private ResourcesIface resources;
 
+    private static HashMap<string, uint> update_id_hash;
+
     public SearchContainer (string             id,
                             MediaContainer     parent,
                             string             title,
@@ -49,6 +51,20 @@ public class Rygel.Tracker.SearchContainer : SimpleContainer {
                             ArrayList<string>? filters = null) {
         base (id, parent, title);
 
+        if (unlikely (update_id_hash == null)) {
+            update_id_hash = new HashMap<string, uint> ();
+        }
+
+        if (update_id_hash.has_key (this.id)) {
+            this.update_id = update_id_hash[this.id];
+        }
+
+        this.container_updated.connect ( (_, b) => {
+            if (b == this) {
+                update_id_hash[this.id] = this.update_id;
+            }
+        });
+
         this.item_factory = item_factory;
 
         var variables = new ArrayList<string> ();