Method

TsparqlNotifiersignal_subscribe

Declaration [src]

guint
tracker_notifier_signal_subscribe (
  TrackerNotifier* notifier,
  GDBusConnection* connection,
  const gchar* service,
  const gchar* object_path,
  const gchar* graph
)

Description [src]

Listens to notification events from a remote DBus SPARQL endpoint.

If connection refers to a message bus (system/session), service must refer to a D-Bus name (either unique or well-known). If connection is a non-message bus (e.g. a peer-to-peer D-Bus connection) the service argument may be NULL.

If the object_path argument is NULL, the default /org/freedesktop/Tracker3/Endpoint path will be used. If graph is NULL, all graphs will be listened for.

The signal subscription can be removed with tracker_notifier_signal_unsubscribe().

Note that this call is not necessary to receive notifications on a connection obtained through tracker_sparql_connection_bus_new(), only to listen to update notifications from additional DBus endpoints.

Parameters

connection

Type: GDBusConnection

A GDBusConnection.

The data is owned by the caller of the method.
service

Type: const gchar*

DBus service name to subscribe to events for, or NULL.

The argument can be NULL.
The data is owned by the caller of the method.
The value is a NUL terminated UTF-8 string.
object_path

Type: const gchar*

DBus object path to subscribe to events for, or NULL.

The argument can be NULL.
The data is owned by the caller of the method.
The value is a NUL terminated UTF-8 string.
graph

Type: const gchar*

Graph to listen events for, or NULL.

The argument can be NULL.
The data is owned by the caller of the method.
The value is a NUL terminated UTF-8 string.

Return value

Type: guint

An ID for this subscription.