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/*
* Copyright © 2012 Canonical Ltd.
* By Siegfried-A. Gevatter <siegfried.gevatter@collabora.co.uk>
*
* Based upon a C implementation (© 2010 Canonical Ltd) by:
* Mikkel Kamstrup Erlandsen <mikkel.kamstrup@canonical.com>
*
* This program 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 program 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 Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
namespace Zeitgeist
{
/**
* Listens for updates to the Zeitgeist event log
*
* A #Monitor listens for updates to the Zeitgeist event log
* matching a given set of templates and with timestamps in some predefined
* time range.
*
* A monitor must be installed into the running Zeitgeist daemon by calling
* zeitgeist_log_install_monitor(). The monitor will not emit any of the
* ::events-added or ::events-deleted signals before this.
*/
public class Monitor : Object, RemoteMonitor
{
private static int monitor_counter = 0;
public TimeRange time_range {get; construct set;}
public GenericArray<Event> event_templates {get; construct set;}
// Client side D-Bus path the monitor lives under
private ObjectPath monitor_path;
/**
* ZeitgeistMonitor::events-inserted:
*
* Emitted when events matching the event templates and with timestamps
* within the time range of the monitor has been inserted into the log.
*
* @param time_range A #ZeitgeistTimeRange that specifies the minimum and
* maximum of the timestamps in @events
* @param events A #ZeitgeistResultSet holding the "ZeitgeistEvent"s that
* have been inserted into the log
*/
public signal void events_inserted (TimeRange time_range,
ResultSet events);
/**
* ZeitgeistMonitor::events-deleted:
*
* Emitted when events with timestamps within the time range of this
* monitor have been deleted from the log. Note that the deleted events
* may not match the event templates for the monitor.
*
* @param time_range A #ZeitgeistTimeRange that specifies the minimum and
* maximum timestamps of the deleted events
* @param event_ids A #GArray of #guint32<!-- -->s holding the IDs of the
* deleted events
*/
public signal void events_deleted (TimeRange time_range,
uint32[] event_ids);
/**
* zeitgeist_monitor_new
*
* Create a new monitor. Before you can receive signals from the monitor you
* need to install it in the running Zeitgeist daemon by calling
* zeitgeist_log_install_monitor().
*
* @param time_range The monitor will only listen for events with
* timestamps within this time range. Note that it is legal for
* applications to insert events that are "in the past".
* @param event_templates A #GPtrArray of #ZeitgeistEvent<!-- -->s.
* Only listen for events that match any of these templates.
*
* @return A reference to a newly allocated monitor
*/
public Monitor (TimeRange time_range, owned GenericArray<Event> event_templates)
{
this.time_range = time_range;
this.event_templates = event_templates;
this.monitor_path = new ObjectPath (
"/org/gnome/zeitgeist/monitor/%i".printf (monitor_counter++));
}
public GenericArray<Event> get_templates ()
{
return event_templates;
}
public ObjectPath get_path ()
{
return monitor_path;
}
public async void notify_insert (
Variant time_range,
Variant events)
{
try
{
SimpleResultSet result_set = new SimpleResultSet (
Events.from_variant (events));
events_inserted (new TimeRange.from_variant (time_range),
result_set);
}
catch (DataModelError err)
{
warning ("%s", err.message);
}
}
public async void notify_delete (
Variant time_range,
uint32[] event_ids)
{
try
{
events_deleted (new TimeRange.from_variant (time_range),
event_ids);
}
catch (DataModelError err)
{
warning ("%s", err.message);
}
}
}
}
// vim:expandtab:ts=4:sw=4
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