stevedore/stevedore/named.py
2012-07-22 16:54:13 -04:00

37 lines
1.5 KiB
Python

from .enabled import EnabledExtensionManager
class NamedExtensionManager(EnabledExtensionManager):
"""ExtensionManager that only loads the named extensions.
This is useful for explictly enabling extensions in a
configuration file, for example.
:param namespace: The namespace for the entry points.
:type namespace: str
:param name: The names of the extensions to load.
:type name: str
:param invoke_on_load: Boolean controlling whether to invoke the
object returned by the entry point after the driver is loaded.
:type invoke_on_load: bool
:param invoke_args: Positional arguments to pass when invoking
the object returned by the entry point. Only used if invoke_on_load
is True.
:type invoke_args: tuple
:param invoke_kwds: Named arguments to pass when invoking
the object returned by the entry point. Only used if invoke_on_load
is True.
:type invoke_kwds: dict
"""
def __init__(self, namespace, names,
invoke_on_load=False, invoke_args=(), invoke_kwds={}):
def check(ep):
return ep.name in names
super(NamedExtensionManager, self).__init__(namespace,
check,
invoke_on_load=invoke_on_load,
invoke_args=invoke_args,
invoke_kwds=invoke_kwds,
)