[tracker/writeback-refactor-0.10: 1/64] miner/fs: Add an empty listener class for writeback

[Carlos Garnacho <carlosg src gnome org>]

commit eadb4a57d39435620df77c285db7cc00eddf8fda
Author: Philip Van Hoof <philip codeminded be>
Date:   Thu Jul 7 12:57:43 2011 +0200

    miner/fs: Add an empty listener class for writeback

 src/miners/fs/Makefile.am                    |    8 +-
 src/miners/fs/tracker-writeback-listener.c   |  187 ++++++++++++++++++++++++++
 src/miners/fs/tracker-writeback-listener.h   |   53 +++++++
 src/miners/fs/tracker-writeback.c            |   70 ++++++++++
 src/miners/fs/tracker-writeback.h            |   38 +++++
 5 files changed, 355 insertions(+), 1 deletions(-)
---
diff --git a/src/miners/fs/Makefile.am b/src/miners/fs/Makefile.am
index 4c6c9f2..ad4a44c 100644
--- a/src/miners/fs/Makefile.am
+++ b/src/miners/fs/Makefile.am
@@ -39,7 +39,13 @@ tracker_miner_fs_SOURCES =                             \
 	tracker-miner-files.c                          \
 	tracker-miner-files.h                          \
 	tracker-miner-files-index.c                    \
-	tracker-miner-files-index.h
+	tracker-miner-files-index.h                    \
+	tracker-writeback-listener.c                   \
+	tracker-writeback-listener.h                   \
+	tracker-writeback-dispatcher.c                 \
+	tracker-writeback-dispatcher.h                 \
+	tracker-writeback.c                            \
+	tracker-writeback.h
 
 tracker_miner_fs_LDADD =                               \
 	$(top_builddir)/src/libtracker-miner/libtracker-miner- TRACKER_API_VERSION@.la \
diff --git a/src/miners/fs/tracker-writeback-dispatcher.c b/src/miners/fs/tracker-writeback-dispatcher.c
new file mode 100644
index 0000000..e69de29
diff --git a/src/miners/fs/tracker-writeback-dispatcher.h b/src/miners/fs/tracker-writeback-dispatcher.h
new file mode 100644
index 0000000..e69de29
diff --git a/src/miners/fs/tracker-writeback-listener.c b/src/miners/fs/tracker-writeback-listener.c
new file mode 100644
index 0000000..b7daf77
--- /dev/null
+++ b/src/miners/fs/tracker-writeback-listener.c
@@ -0,0 +1,187 @@
+/*
+ * Copyright (C) 2010, Nokia <ivan frade nokia com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA  02110-1301, USA.
+ */
+
+#include "config.h"
+
+#include <libtracker-common/tracker-dbus.h>
+#include <libtracker-sparql/tracker-sparql.h>
+#include <libtracker-miner/tracker-miner-dbus.h>
+
+#include "tracker-writeback-listener.h"
+
+
+typedef struct {
+	TrackerMinerFiles *files_miner;
+	GDBusConnection *connection;
+} TrackerWritebackListenerPrivate;
+
+enum {
+	PROP_0,
+	PROP_FILES_MINER
+};
+
+#define TRACKER_WRITEBACK_LISTENER_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), TRACKER_TYPE_WRITEBACK_LISTENER, TrackerWritebackListenerPrivate))
+
+static void     writeback_set_property    (GObject              *object,
+                                           guint                 param_id,
+                                           const GValue         *value,
+                                           GParamSpec           *pspec);
+static void     writeback_get_property    (GObject              *object,
+                                           guint                 param_id,
+                                           GValue               *value,
+                                           GParamSpec           *pspec);
+static void     writeback_finalize        (GObject              *object);
+static gboolean writeback_initable_init   (GInitable            *initable,
+                                           GCancellable         *cancellable,
+                                           GError              **error);
+
+static void
+writeback_initable_iface_init (GInitableIface *iface)
+{
+	iface->init = writeback_initable_init;
+}
+
+G_DEFINE_TYPE_WITH_CODE (TrackerWritebackListener, tracker_writeback_listener, G_TYPE_OBJECT,
+                         G_IMPLEMENT_INTERFACE (G_TYPE_INITABLE,
+                                                writeback_initable_iface_init));
+
+static void
+tracker_writeback_listener_class_init (TrackerWritebackListenerClass *klass)
+{
+	GObjectClass *object_class;
+
+	object_class = G_OBJECT_CLASS (klass);
+
+	object_class->finalize = writeback_finalize;
+	object_class->set_property = writeback_set_property;
+	object_class->get_property = writeback_get_property;
+
+	g_object_class_install_property (object_class,
+	                                 PROP_FILES_MINER,
+	                                 g_param_spec_object ("files_miner",
+	                                                      "files_miner",
+	                                                      "The FS Miner",
+	                                                      TRACKER_TYPE_MINER_FILES,
+	                                                      G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY));
+
+	g_type_class_add_private (klass, sizeof (TrackerWritebackListenerPrivate));
+}
+
+static void
+writeback_set_property (GObject      *object,
+                    guint         param_id,
+                    const GValue *value,
+                    GParamSpec   *pspec)
+{
+	TrackerWritebackListenerPrivate *priv;
+
+	priv = TRACKER_WRITEBACK_LISTENER_GET_PRIVATE (object);
+
+	switch (param_id) {
+	case PROP_FILES_MINER:
+		priv->files_miner = g_value_dup_object (value);
+		break;
+	default:
+		G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
+		break;
+	}
+}
+
+
+static void
+writeback_get_property (GObject    *object,
+                    guint       param_id,
+                    GValue     *value,
+                    GParamSpec *pspec)
+{
+	TrackerWritebackListenerPrivate *priv;
+
+	priv = TRACKER_WRITEBACK_LISTENER_GET_PRIVATE (object);
+
+	switch (param_id) {
+	case PROP_FILES_MINER:
+		g_value_set_object (value, priv->files_miner);
+		break;
+	default:
+		G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
+		break;
+	}
+}
+
+static void
+writeback_finalize (GObject *object)
+{
+	TrackerWritebackListenerPrivate *priv = TRACKER_WRITEBACK_LISTENER_GET_PRIVATE (object);
+
+	if (priv->connection) {
+		g_object_unref (priv->connection);
+	}
+
+	g_object_unref (priv->files_miner);
+}
+
+
+static void
+tracker_writeback_listener_init (TrackerWritebackListener *object)
+{
+}
+
+static gboolean
+writeback_initable_init (GInitable    *initable,
+                         GCancellable *cancellable,
+                         GError       **error)
+{
+	TrackerWritebackListenerPrivate *priv;
+	GError *internal_error = NULL;
+
+	priv = TRACKER_WRITEBACK_LISTENER_GET_PRIVATE (initable);
+
+	priv->connection = g_bus_get_sync (G_BUS_TYPE_SESSION, NULL, &internal_error);
+
+	if (internal_error) {
+		g_propagate_error (error, internal_error);
+		return FALSE;
+	}
+
+	return TRUE;
+}
+
+TrackerWritebackListener *
+tracker_writeback_listener_new (TrackerMinerFiles  *miner_files,
+                                GError            **error)
+{
+	GObject *miner;
+	GError *internal_error = NULL;
+
+	miner =  g_initable_new (TRACKER_TYPE_WRITEBACK_LISTENER,
+	                         NULL,
+	                         &internal_error,
+	                         "files-miner", miner_files,
+	                         NULL);
+
+	if (internal_error) {
+		g_propagate_error (error, internal_error);
+		return NULL;
+	}
+
+	return (TrackerWritebackListener *) miner;
+}
+
+	// tracker_miner_fs_writeback_file (TRACKER_MINER_FS (miner_files), file, ...);
+
diff --git a/src/miners/fs/tracker-writeback-listener.h b/src/miners/fs/tracker-writeback-listener.h
new file mode 100644
index 0000000..ab1a94d
--- /dev/null
+++ b/src/miners/fs/tracker-writeback-listener.h
@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2010, Nokia <ivan frade nokia com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA  02110-1301, USA.
+ */
+
+#ifndef __TRACKER_WRITEBACK_LISTENER_H__
+#define __TRACKER_WRITEBACK_LISTENER_H__
+
+#include <glib-object.h>
+
+#include "tracker-miner-files.h"
+
+G_BEGIN_DECLS
+
+#define TRACKER_TYPE_WRITEBACK_LISTENER            (tracker_writeback_listener_get_type ())
+#define TRACKER_WRITEBACK_LISTENER(object)         (G_TYPE_CHECK_INSTANCE_CAST ((object), TRACKER_TYPE_WRITEBACK_LISTENER, TrackerWritebackListener))
+#define TRACKER_WRITEBACK_LISTENER_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), TRACKER_TYPE_DBUS_WRITEBACK_LISTENER, TrackerWritebackListenerClass))
+#define TRACKER_IS_WRITEBACK_LISTENER(object)      (G_TYPE_CHECK_INSTANCE_TYPE ((object), TRACKER_TYPE_WRITEBACK_LISTENER))
+#define TRACKER_IS_WRITEBACK_LISTENER_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), TRACKER_TYPE_WRITEBACK_LISTENER))
+#define TRACKER_WRITEBACK_LISTENER_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), TRACKER_TYPE_WRITEBACK_LISTENER, TrackerWritebackListenerClass))
+
+typedef struct TrackerWritebackListener TrackerWritebackListener;
+typedef struct TrackerWritebackListenerClass TrackerWritebackListenerClass;
+
+struct TrackerWritebackListener {
+	GObject parent;
+};
+
+struct TrackerWritebackListenerClass {
+	GObjectClass parent;
+};
+
+GType                     tracker_writeback_listener_get_type (void);
+TrackerWritebackListener *tracker_writeback_listener_new      (TrackerMinerFiles  *miner_files,
+                                                               GError            **error);
+
+G_END_DECLS
+
+#endif /* __TRACKER_WRITEBACK_LISTENERINDEX_H__ */
diff --git a/src/miners/fs/tracker-writeback.c b/src/miners/fs/tracker-writeback.c
new file mode 100644
index 0000000..4bf4399
--- /dev/null
+++ b/src/miners/fs/tracker-writeback.c
@@ -0,0 +1,70 @@
+/*
+ * Copyright (C) 2008, Nokia <ivan frade nokia com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA  02110-1301, USA.
+ */
+
+#include "config.h"
+
+#include <gio/gio.h>
+
+#include "tracker-writeback.h"
+#include "tracker-writeback-listener.h"
+
+/* Listener listens for the Writeback signal coming from the store, it performs
+ * a few queries to get a set of changed values, and pushes the writeback task
+ * to miner-fs's queues. */
+static TrackerWritebackListener *listener = NULL;
+
+/* That task in miner-fs's queue callsback to the dispatcher. The dispatcher
+ * calls the external tracker-writeback process which does the actual write */
+
+// static void TrackerWritebackDispatcher *dispatcher = NULL;
+
+void
+tracker_writeback_init (TrackerMinerFiles  *miner_files,
+                        GError            **error)
+{
+	GError *internal_error = NULL;
+
+	listener = tracker_writeback_listener_new (miner_files, &internal_error);
+
+//	if (!internal_error) {
+//		distpatcher = tracker_writeback_listener_new (miner_files, &internal_error);
+//	}
+
+	if (internal_error) {
+		if (listener) {
+			g_object_unref (listener);
+			listener = NULL;
+		}
+		g_propagate_error (error, internal_error);
+	}
+}
+
+void
+tracker_writeback_shutdown (void)
+{
+	if (listener) {
+		g_object_unref (listener);
+		listener = NULL;
+	}
+
+//	if (dispatcher) {
+//		g_object_unref (dispatcher);
+//		dispatcher = NULL;
+//	}
+}
diff --git a/src/miners/fs/tracker-writeback.h b/src/miners/fs/tracker-writeback.h
new file mode 100644
index 0000000..0f7408f
--- /dev/null
+++ b/src/miners/fs/tracker-writeback.h
@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2008, Nokia <ivan frade nokia com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA  02110-1301, USA.
+ */
+
+#ifndef __TRACKER_WRITEBACK_H__
+#define __TRACKER_WRITEBACK_H__
+
+
+#include <libtracker-miner/tracker-miner.h>
+
+#include "tracker-config.h"
+
+#include "tracker-miner-files.h"
+
+G_BEGIN_DECLS
+
+void tracker_writeback_init     (TrackerMinerFiles  *miner_files,
+                                 GError            **error);
+void tracker_writeback_shutdown (void);
+
+G_END_DECLS
+
+#endif /* __TRACKER_WRITEBACK_H__ */