[folks] eds: Share a single E.SourceRegistry between all Edsf.PersonaStores

[Philip Withnall <pwithnall src gnome org>]

commit 09c1736bceb33722139704f71bad40ec7b070177
Author: Philip Withnall <philip tecnocode co uk>
Date:   Sun Jun 24 18:33:49 2012 +0100

    eds: Share a single E.SourceRegistry between all Edsf.PersonaStores
    
    Turns out a single E.SourceRegistry takes about 200ms to construct, due to
    involving D-Bus round trips, so sharing the existing SourceRegistry from the
    Eds.Backend to all its Edsf.PersonaStores is a big win.

 backends/eds/eds-backend.vala            |    3 +-
 backends/eds/lib/edsf-persona-store.vala |   38 ++++++++++++++++++++++++++----
 2 files changed, 35 insertions(+), 6 deletions(-)
---
diff --git a/backends/eds/eds-backend.vala b/backends/eds/eds-backend.vala
index bdf9b3b..1acf38f 100644
--- a/backends/eds/eds-backend.vala
+++ b/backends/eds/eds-backend.vala
@@ -236,7 +236,8 @@ public class Folks.Backends.Eds.Backend : Folks.Backend
 
       debug ("Adding address book '%s'.", uid);
 
-      var store = new Edsf.PersonaStore (s);
+      var store =
+          new Edsf.PersonaStore.with_source_registry (this._ab_sources, s);
 
       store.removed.connect (this._store_removed_cb);
 
diff --git a/backends/eds/lib/edsf-persona-store.vala b/backends/eds/lib/edsf-persona-store.vala
index 81814c8..d9f5fd9 100644
--- a/backends/eds/lib/edsf-persona-store.vala
+++ b/backends/eds/lib/edsf-persona-store.vala
@@ -222,14 +222,42 @@ public class Edsf.PersonaStore : Folks.PersonaStore
    * @param s the e-d-s source being represented by the persona store
    *
    * @since 0.6.0
+   * @deprecated UNRELEASED Use { link Edsf.PersonaStore.with_source_registry}
    */
-  public PersonaStore (E.Source s)
+  [Deprecated (since = "UNRELEASED",
+      replacement = "Edsf.PersonaStore.with_source_registry()")]
+  public PersonaStore (E.SourceRegistry r, E.Source s)
     {
       string eds_uid = s.get_uid ();
       string eds_name = s.get_display_name ();
       Object (id: eds_uid,
               display_name: eds_name,
               source: s);
+
+      this._source_registry = null; /* created in prepare() */
+    }
+
+  /**
+   * Create a new PersonaStore.
+   *
+   * Create a new persona store to store the { link Persona}s for the contacts
+   * in `s`. Passing a re-used source registry to the constructor (compared to
+   * the old { link Edsf.PersonaStore} constructor) saves a lot of time and
+   * D-Bus round trips.
+   *
+   * @param r the EDS source registry giving access to all EDS sources
+   * @param s the EDS source being represented by the persona store
+   *
+   * @since UNRELEASED
+   */
+  public PersonaStore.with_source_registry (E.SourceRegistry r, E.Source s)
+    {
+      string eds_uid = s.get_uid ();
+      Object (id: eds_uid,
+              display_name: eds_uid,
+              source: s);
+
+      this._source_registry = r;
     }
 
   construct
@@ -630,10 +658,10 @@ public class Edsf.PersonaStore : Folks.PersonaStore
               /* Listen for removal signals for the address book. There's no
                * need to check if we still exist in the list, as
                * addressbook.open() will fail if we don't. */
-              this._source_registry = yield create_source_registry ();
-
-              Internal.profiling_point ("created SourceRegistry in " +
-                  "Edsf.PersonaStore (ID: %s)", this.id);
+              if (this._source_registry == null)
+                {
+                  this._source_registry = yield create_source_registry ();
+                }
 
               /* We know _source_registry != null because otherwise
                * create_source_registry() would've thrown an error. */