60 lines
2.2 KiB
Python
60 lines
2.2 KiB
Python
# Copyright 2010 United States Government as represented by the
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# Administrator of the National Aeronautics and Space Administration.
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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from oslo_utils import importutils
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# Importing full names to not pollute the namespace and cause possible
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# collisions with use of 'from nova.compute import <foo>' elsewhere.
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import nova.cells.opts
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import nova.exception
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CELL_TYPE_TO_CLS_NAME = {'api': 'nova.compute.cells_api.ComputeCellsAPI',
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'compute': 'nova.compute.api.API',
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None: 'nova.compute.api.API',
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}
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def _get_compute_api_class_name():
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"""Returns the name of compute API class."""
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cell_type = nova.cells.opts.get_cell_type()
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return CELL_TYPE_TO_CLS_NAME[cell_type]
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def API(*args, **kwargs):
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class_name = _get_compute_api_class_name()
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return importutils.import_object(class_name, *args, **kwargs)
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def HostAPI(*args, **kwargs):
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"""Returns the 'HostAPI' class from the same module as the configured
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compute api
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"""
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compute_api_class_name = _get_compute_api_class_name()
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compute_api_class = importutils.import_class(compute_api_class_name)
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class_name = compute_api_class.__module__ + ".HostAPI"
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return importutils.import_object(class_name, *args, **kwargs)
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def InstanceActionAPI(*args, **kwargs):
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"""Returns the 'InstanceActionAPI' class from the same module as the
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configured compute api.
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"""
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compute_api_class_name = _get_compute_api_class_name()
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compute_api_class = importutils.import_class(compute_api_class_name)
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class_name = compute_api_class.__module__ + ".InstanceActionAPI"
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return importutils.import_object(class_name, *args, **kwargs)
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