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/*
* Copyright (C) 2016, Red Hat Inc.
*
* 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.
*/
#include "config.h"
#include "tracker-extract-watchdog.h"
#include <libtracker-common/tracker-common.h>
#include <libtracker-miner/tracker-miner.h>
struct _TrackerExtractWatchdog {
GObject parent_class;
guint extractor_watchdog_id;
guint timeout_id;
gboolean initializing;
};
static void extract_watchdog_start (TrackerExtractWatchdog *watchdog,
gboolean autostart);
G_DEFINE_TYPE (TrackerExtractWatchdog, tracker_extract_watchdog, G_TYPE_OBJECT)
static void
extract_watchdog_stop (TrackerExtractWatchdog *watchdog)
{
if (watchdog->extractor_watchdog_id) {
g_bus_unwatch_name (watchdog->extractor_watchdog_id);
watchdog->extractor_watchdog_id = 0;
}
}
static gboolean
extract_watchdog_name_vanished_timeout (gpointer user_data)
{
TrackerExtractWatchdog *watchdog = user_data;
watchdog->timeout_id = 0;
extract_watchdog_start (watchdog, TRUE);
return G_SOURCE_REMOVE;
}
static void
extract_watchdog_name_appeared (GDBusConnection *conn,
const gchar *name,
const gchar *name_owner,
gpointer user_data)
{
TrackerExtractWatchdog *watchdog = user_data;
if (watchdog->initializing)
watchdog->initializing = FALSE;
}
static void
extract_watchdog_name_vanished (GDBusConnection *conn,
const gchar *name,
gpointer user_data)
{
TrackerExtractWatchdog *watchdog = user_data;
/* If connection is lost, there's not much we can startup */
if (conn == NULL)
return;
/* We will ignore the first call after initialization, as we
* don't want to autostart tracker-extract in this case (useful
* for debugging purposes).
*/
if (watchdog->initializing) {
watchdog->initializing = FALSE;
return;
}
g_debug ("tracker-extract vanished, restarting after grace period.");
/* Close the name watch, so we'll create another one that will
* autostart the service if it not already running.
*/
extract_watchdog_stop (watchdog);
/* Give a period of grace before restarting, so we allow replacing
* from eg. a terminal.
*/
watchdog->timeout_id =
g_timeout_add_seconds (1, extract_watchdog_name_vanished_timeout,
watchdog);
}
static void
extract_watchdog_start (TrackerExtractWatchdog *watchdog,
gboolean autostart)
{
g_debug ("Setting up watch on tracker-extract (autostart: %s)",
autostart ? "yes" : "no");
watchdog->extractor_watchdog_id =
g_bus_watch_name (TRACKER_IPC_BUS,
TRACKER_MINER_DBUS_NAME_PREFIX "Extract",
(autostart ?
G_BUS_NAME_WATCHER_FLAGS_AUTO_START :
G_BUS_NAME_WATCHER_FLAGS_NONE),
extract_watchdog_name_appeared,
extract_watchdog_name_vanished,
watchdog, NULL);
}
static void
tracker_extract_watchdog_finalize (GObject *object)
{
TrackerExtractWatchdog *watchdog = TRACKER_EXTRACT_WATCHDOG (object);
extract_watchdog_stop (watchdog);
if (watchdog->timeout_id) {
g_source_remove (watchdog->timeout_id);
}
G_OBJECT_CLASS (tracker_extract_watchdog_parent_class)->finalize (object);
}
static void
tracker_extract_watchdog_class_init (TrackerExtractWatchdogClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->finalize = tracker_extract_watchdog_finalize;
}
static void
tracker_extract_watchdog_init (TrackerExtractWatchdog *watchdog)
{
watchdog->initializing = TRUE;
extract_watchdog_start (watchdog, FALSE);
}
TrackerExtractWatchdog *
tracker_extract_watchdog_new (void)
{
return g_object_new (TRACKER_TYPE_EXTRACT_WATCHDOG,
NULL);
}
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