45 lines
1.6 KiB
Python
45 lines
1.6 KiB
Python
from .named import NamedExtensionManager
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class HookManager(NamedExtensionManager):
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"""Coordinate execution of multiple extensions using a common name.
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:param namespace: The namespace for the entry points.
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:type namespace: str
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:param name: The name of the hooks to load.
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:type name: str
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:param invoke_on_load: Boolean controlling whether to invoke the
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object returned by the entry point after the driver is loaded.
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:type invoke_on_load: bool
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:param invoke_args: Positional arguments to pass when invoking
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the object returned by the entry point. Only used if invoke_on_load
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is True.
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:type invoke_args: tuple
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:param invoke_kwds: Named arguments to pass when invoking
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the object returned by the entry point. Only used if invoke_on_load
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is True.
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:type invoke_kwds: dict
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"""
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def __init__(self, namespace, name,
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invoke_on_load=False, invoke_args=(), invoke_kwds={}):
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self._name = name
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super(HookManager, self).__init__(
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namespace,
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[name],
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invoke_on_load=invoke_on_load,
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invoke_args=invoke_args,
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invoke_kwds=invoke_kwds,
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)
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def __getitem__(self, name):
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"""Return the named extensions.
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Accessing a HookManager as a dictionary (``em['name']``)
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produces a list of the :class:`Extension` instance(s) with the
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specified name, in the order they would be invoked by map().
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"""
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if name != self._name:
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raise KeyError(name)
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return self.extensions
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