179 lines
6.6 KiB
Python
179 lines
6.6 KiB
Python
# Copyright 2014 IBM Corp.
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# Copyright 2015 Clinton Knight
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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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import re
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from manila.api.openstack import versioned_method
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from manila import exception
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from manila.i18n import _
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from manila import utils
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# Define the minimum and maximum version of the API across all of the
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# REST API. The format of the version is:
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# X.Y where:
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#
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# - X will only be changed if a significant backwards incompatible API
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# change is made which affects the API as whole. That is, something
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# that is only very very rarely incremented.
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#
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# - Y when you make any change to the API. Note that this includes
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# semantic changes which may not affect the input or output formats or
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# even originate in the API code layer. We are not distinguishing
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# between backwards compatible and backwards incompatible changes in
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# the versioning system. It must be made clear in the documentation as
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# to what is a backwards compatible change and what is a backwards
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# incompatible one.
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#
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# You must update the API version history string below with a one or
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# two line description as well as update rest_api_version_history.rst
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REST_API_VERSION_HISTORY = """
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REST API Version History:
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* 1.0 - Initial version. Includes all V1 APIs and extensions in Kilo.
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* 2.0 - Versions API updated to reflect beginning of microversions epoch.
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* 2.1 - Share create() doesn't ignore availability_zone field of share.
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* 2.2 - Snapshots become optional feature.
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* 2.3 - Share instances admin API
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* 2.4 - Consistency Group support
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* 2.5 - Share Migration admin API
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* 2.6 - Return share_type UUID instead of name in Share API
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* 2.7 - Rename old extension-like API URLs to core-API-like
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* 2.8 - Attr "is_public" can be set for share using API "manage"
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"""
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# The minimum and maximum versions of the API supported
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# The default api version request is defined to be the
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# the minimum version of the API supported.
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_MIN_API_VERSION = "2.0"
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_MAX_API_VERSION = "2.8"
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DEFAULT_API_VERSION = _MIN_API_VERSION
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# NOTE(cyeoh): min and max versions declared as functions so we can
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# mock them for unittests. Do not use the constants directly anywhere
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# else.
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def min_api_version():
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return APIVersionRequest(_MIN_API_VERSION)
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def max_api_version():
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return APIVersionRequest(_MAX_API_VERSION)
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class APIVersionRequest(utils.ComparableMixin):
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"""This class represents an API Version Request.
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This class includes convenience methods for manipulation
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and comparison of version numbers as needed to implement
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API microversions.
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"""
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def __init__(self, version_string=None, experimental=False):
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"""Create an API version request object."""
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self._ver_major = None
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self._ver_minor = None
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self._experimental = experimental
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if version_string is not None:
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match = re.match(r"^([1-9]\d*)\.([1-9]\d*|0)$",
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version_string)
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if match:
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self._ver_major = int(match.group(1))
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self._ver_minor = int(match.group(2))
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else:
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raise exception.InvalidAPIVersionString(version=version_string)
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def __str__(self):
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"""Debug/Logging representation of object."""
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return ("API Version Request Major: %(major)s, Minor: %(minor)s"
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% {'major': self._ver_major, 'minor': self._ver_minor})
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def is_null(self):
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return self._ver_major is None and self._ver_minor is None
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def _cmpkey(self):
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"""Return the value used by ComparableMixin for rich comparisons."""
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return self._ver_major, self._ver_minor
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@property
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def experimental(self):
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return self._experimental
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@experimental.setter
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def experimental(self, value):
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if type(value) != bool:
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msg = _('The experimental property must be a bool value.')
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raise exception.InvalidParameterValue(err=msg)
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self._experimental = value
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def matches_versioned_method(self, method):
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"""Compares this version to that of a versioned method."""
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if type(method) != versioned_method.VersionedMethod:
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msg = _('An API version request must be compared '
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'to a VersionedMethod object.')
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raise exception.InvalidParameterValue(err=msg)
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return self.matches(method.start_version,
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method.end_version,
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method.experimental)
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def matches(self, min_version, max_version, experimental=False):
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"""Compares this version to the specified min/max range.
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Returns whether the version object represents a version
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greater than or equal to the minimum version and less than
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or equal to the maximum version.
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If min_version is null then there is no minimum limit.
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If max_version is null then there is no maximum limit.
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If self is null then raise ValueError.
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:param min_version: Minimum acceptable version.
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:param max_version: Maximum acceptable version.
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:param experimental: Whether to match experimental APIs.
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:returns: boolean
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"""
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if self.is_null():
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raise ValueError
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# NOTE(cknight): An experimental request should still match a
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# non-experimental API, so the experimental check isn't just
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# looking for equality.
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if not self.experimental and experimental:
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return False
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if max_version.is_null() and min_version.is_null():
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return True
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elif max_version.is_null():
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return min_version <= self
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elif min_version.is_null():
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return self <= max_version
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else:
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return min_version <= self <= max_version
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def get_string(self):
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"""Returns a string representation of this object.
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If this method is used to create an APIVersionRequest,
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the resulting object will be an equivalent request.
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"""
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if self.is_null():
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raise ValueError
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return ("%(major)s.%(minor)s" %
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{'major': self._ver_major, 'minor': self._ver_minor})
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