[tracker] tracker-store: Remove unused statistics signal

[Jürg Billeter <juergbi src gnome org>]

commit 91e8c18ad67e6ed439518338997ca3b19ce90233
Author: Jürg Billeter <j bitron ch>
Date:   Wed Mar 3 11:49:27 2010 +0100

    tracker-store: Remove unused statistics signal
    
    This avoids regular wakeups without any client activity.

 data/dbus/tracker-statistics.xml       |    7 -
 src/tracker-store/tracker-statistics.c |  212 --------------------------------
 src/tracker-store/tracker-statistics.h |    1 -
 3 files changed, 0 insertions(+), 220 deletions(-)
---
diff --git a/data/dbus/tracker-statistics.xml b/data/dbus/tracker-statistics.xml
index 8efea99..1f4742e 100644
--- a/data/dbus/tracker-statistics.xml
+++ b/data/dbus/tracker-statistics.xml
@@ -28,12 +28,5 @@
 		  value="QVector&lt;QStringList&gt;"/>
       <arg type="aas" name="service_stats" direction="out" />
     </method>
-
-    <!-- Signal whenever the count of a category changed. Look at GetStats for
-	 the format of service_stats.
-      -->
-    <signal name="Updated">
-      <arg type="aas" name="statistics"/>
-    </signal>
   </interface>
 </node>
diff --git a/src/tracker-store/tracker-statistics.c b/src/tracker-store/tracker-statistics.c
index 6cf3ff5..8f98e62 100644
--- a/src/tracker-store/tracker-statistics.c
+++ b/src/tracker-store/tracker-statistics.c
@@ -39,84 +39,16 @@
 
 #define TRACKER_STATISTICS_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE ((obj), TRACKER_TYPE_STATISTICS, TrackerStatisticsPrivate))
 
-/* In seconds (5 minutes for now) */
-#define CACHE_LIFETIME 300
-
-typedef struct {
-	GHashTable       *cache;
-	guint             cache_timeout_id;
-} TrackerStatisticsPrivate;
-
-enum {
-	UPDATED,
-	LAST_SIGNAL
-};
-
-static void        tracker_statistics_finalize (GObject       *object);
-static gboolean    cache_timeout     (gpointer       user_data);
-static GHashTable *cache_get_latest  (void);
-
-static guint signals[LAST_SIGNAL] = {0};
-
 G_DEFINE_TYPE(TrackerStatistics, tracker_statistics, G_TYPE_OBJECT)
 
 static void
 tracker_statistics_class_init (TrackerStatisticsClass *klass)
 {
-	GObjectClass *object_class;
-
-	object_class = G_OBJECT_CLASS (klass);
-
-	object_class->finalize = tracker_statistics_finalize;
-
-	signals[UPDATED] =
-		g_signal_new ("updated",
-		              G_TYPE_FROM_CLASS (klass),
-		              G_SIGNAL_RUN_LAST,
-		              0,
-		              NULL, NULL,
-		              g_cclosure_marshal_VOID__POINTER,
-		              G_TYPE_NONE,
-		              1,
-		              TRACKER_TYPE_G_STRV_ARRAY);
-
-	g_type_class_add_private (object_class, sizeof (TrackerStatisticsPrivate));
 }
 
 static void
 tracker_statistics_init (TrackerStatistics *object)
 {
-	TrackerStatisticsPrivate *priv;
-
-	priv = TRACKER_STATISTICS_GET_PRIVATE (object);
-
-	/* Do first time stats lookup */
-	priv->cache = cache_get_latest ();
-
-	priv->cache_timeout_id =
-		g_timeout_add_seconds (CACHE_LIFETIME,
-		                       cache_timeout,
-		                       object);
-}
-
-static void
-tracker_statistics_finalize (GObject *object)
-{
-	TrackerStatistics            *statistics;
-	TrackerStatisticsPrivate *priv;
-
-	statistics = TRACKER_STATISTICS (object);
-	priv = TRACKER_STATISTICS_GET_PRIVATE (statistics);
-
-	if (priv->cache_timeout_id != 0) {
-		g_source_remove (priv->cache_timeout_id);
-	}
-
-	if (priv->cache) {
-		g_hash_table_unref (priv->cache);
-	}
-
-	G_OBJECT_CLASS (tracker_statistics_parent_class)->finalize (object);
 }
 
 TrackerStatistics *
@@ -125,66 +57,6 @@ tracker_statistics_new (void)
 	return g_object_new (TRACKER_TYPE_STATISTICS, NULL);
 }
 
-/*
- * Functions
- */
-static GHashTable *
-cache_get_latest (void)
-{
-	GHashTable    *values;
-	TrackerClass **classes, *cl;
-	TrackerDBInterface *iface;
-	guint               i, n_classes;
-
-	g_message ("Requesting statistics from database for an accurate signal");
-
-	values = g_hash_table_new_full (g_str_hash,
-	                                g_str_equal,
-	                                g_free,
-	                                NULL);
-
-	classes = tracker_ontologies_get_classes (&n_classes);
-
-	iface = tracker_db_manager_get_db_interface ();
-
-	for (i = 0; i < n_classes; i++) {
-		TrackerDBStatement *stmt;
-		TrackerDBResultSet *result_set;
-		gint count;
-
-		cl = classes[i];
-
-		if (g_str_has_prefix (tracker_class_get_name (cl), "xsd:")) {
-			/* xsd classes do not derive from rdfs:Resource and do not use separate tables */
-			continue;
-		}
-
-		stmt = tracker_db_interface_create_statement (iface, "SELECT COUNT(1) FROM \"%s\"", tracker_class_get_name (cl));
-		result_set = tracker_db_statement_execute (stmt, NULL);
-
-		tracker_db_result_set_get (result_set, 0, &count, -1);
-
-		g_hash_table_insert (values,
-		                     g_strdup (tracker_class_get_name (cl)),
-		                     GINT_TO_POINTER (count));
-
-		g_object_unref (result_set);
-		g_object_unref (stmt);
-	}
-
-	return values;
-}
-
-static gboolean
-cache_timeout (gpointer user_data)
-{
-	g_message ("Statistics cache has expired, updating...");
-
-	tracker_statistics_signal ();
-
-	return TRUE;
-}
-
 static gint
 cache_sort_func (gconstpointer a,
                  gconstpointer b)
@@ -204,7 +76,6 @@ tracker_statistics_get (TrackerStatistics      *object,
                         GError                **error)
 {
 	TrackerClass **classes, *cl;
-	TrackerStatisticsPrivate *priv;
 	guint                     request_id;
 	GPtrArray                *values;
 	guint                     i, n_classes;
@@ -214,8 +85,6 @@ tracker_statistics_get (TrackerStatistics      *object,
 	tracker_dbus_request_block_hooks ();
 	tracker_dbus_request_new (request_id, context, "%s()", __FUNCTION__);
 
-	priv = TRACKER_STATISTICS_GET_PRIVATE (object);
-
 	values = g_ptr_array_new ();
 
 	classes = tracker_ontologies_get_classes (&n_classes);
@@ -249,84 +118,3 @@ tracker_statistics_get (TrackerStatistics      *object,
 	tracker_dbus_request_success (request_id, context);
 	tracker_dbus_request_unblock_hooks ();
 }
-
-void
-tracker_statistics_signal (void)
-{
-	GObject                      *statistics;
-	TrackerStatisticsPrivate *priv;
-	GHashTable           *stats;
-	GHashTableIter        iter;
-	gpointer              key, value;
-	GPtrArray            *values;
-
-	statistics = tracker_dbus_get_object (TRACKER_TYPE_STATISTICS);
-	priv = TRACKER_STATISTICS_GET_PRIVATE (statistics);
-
-	/* Get latest */
-	stats = cache_get_latest ();
-
-	/* There are 3 situations here:
-	 *  - 1. No new stats
-	 *       Action: Do nothing
-	 *  - 2. New stats and old stats
-	 *       Action: Check what has changed and emit new stats
-	 */
-
-	g_message ("Checking for statistics changes and signalling clients...");
-
-	/* Situation #1 */
-	if (g_hash_table_size (stats) < 1) {
-		g_hash_table_unref (stats);
-		g_message ("  No new statistics, doing nothing");
-		return;
-	}
-
-	/* Situation #2 */
-	values = g_ptr_array_new ();
-
-	g_hash_table_iter_init (&iter, stats);
-	while (g_hash_table_iter_next (&iter, &key, &value)) {
-		const gchar  *service_type;
-		gpointer      data;
-		gint          old_count, new_count;
-
-		service_type = key;
-		new_count = GPOINTER_TO_INT (value);
-
-		data = g_hash_table_lookup (priv->cache, service_type);
-		old_count = GPOINTER_TO_INT (data);
-
-		if (old_count != new_count) {
-			GStrv strv;
-
-			g_message ("  Updating '%s' with new count:%d, old count:%d, diff:%d",
-			           service_type,
-			           new_count,
-			           old_count,
-			           new_count - old_count);
-
-			strv = g_new (gchar*, 3);
-			strv[0] = g_strdup (service_type);
-			strv[1] = g_strdup_printf ("%d", new_count);
-			strv[2] = NULL;
-
-			g_ptr_array_add (values, strv);
-		}
-	}
-
-	if (values->len > 0) {
-		/* Make sure we sort the results first */
-		g_ptr_array_sort (values, cache_sort_func);
-
-		g_signal_emit (statistics, signals[UPDATED], 0, values);
-	} else {
-		g_message ("  No changes in the statistics");
-	}
-
-	g_ptr_array_foreach (values, (GFunc) g_strfreev, NULL);
-	g_ptr_array_free (values, TRUE);
-
-	g_hash_table_unref (priv->cache);
-	priv->cache = stats;
-}
diff --git a/src/tracker-store/tracker-statistics.h b/src/tracker-store/tracker-statistics.h
index 4234285..aba24a0 100644
--- a/src/tracker-store/tracker-statistics.h
+++ b/src/tracker-store/tracker-statistics.h
@@ -52,7 +52,6 @@ TrackerStatistics *tracker_statistics_new      (void);
 void               tracker_statistics_get      (TrackerStatistics      *object,
                                                 DBusGMethodInvocation  *context,
                                                 GError                **error);
-void               tracker_statistics_signal   (void);
 
 G_END_DECLS