DBusInterfaceVTable
Added in version 2.26.
- class DBusInterfaceVTable(*args, **kwargs)
Virtual table for handling properties and method calls for a D-Bus interface.
Since 2.38, if you want to handle getting/setting D-Bus properties
asynchronously, give None as your get_property() or set_property()
function. The D-Bus call will be directed to your method_call function,
with the provided interface_name set to “org.freedesktop.DBus.Properties”.
Ownership of the DBusMethodInvocation object passed to the
method_call() function is transferred to your handler; you must
call one of the methods of DBusMethodInvocation to return a reply
(possibly empty), or an error. These functions also take ownership
of the passed-in invocation object, so unless the invocation
object has otherwise been referenced, it will be then be freed.
Calling one of these functions may be done within your
method_call() implementation but it also can be done at a later
point to handle the method asynchronously.
The usual checks on the validity of the calls is performed. For
Get calls, an error is automatically returned if the property does
not exist or the permissions do not allow access. The same checks are
performed for Set calls, and the provided value is also checked for
being the correct type.
For both Get and Set calls, the DBusMethodInvocation
passed to the method_call handler can be queried with
get_property_info() to get a pointer
to the DBusPropertyInfo of the property.
If you have readable properties specified in your interface info,
you must ensure that you either provide a non-None get_property``()
function or provide implementations of both the ``Get and GetAll
methods on org.freedesktop.DBus.Properties interface in your method_call
function. Note that the required return type of the Get call is
(v), not the type of the property. GetAll expects a return value
of type a{sv}.
If you have writable properties specified in your interface info,
you must ensure that you either provide a non-None set_property``()
function or provide an implementation of the ``Set call. If implementing
the call, you must return the value of type %G_VARIANT_TYPE_UNIT.