a3e8adf561
This patch adds support for flavors to the client library. Flavors are
an admin endpoint, which means pool's rules apply to them.
Since flavors were added since 1.1, this patch also adds a version
decorator that will help making sure features are accessible just if the
api_version the client has been instantiated with matches the version
the feature was added into.
Note that the core module does not use the version decorator. There are
2 reasons for this:
1. Users accessing the core module should know what they're doing
2. If the transport loads the spec for the API version it was
instantiated with. If that spec does not contain a specific action,
the whole operation will fail before hitting the wire.
Partially-Implements blueprint: api-v1.1
Change-Id: I92dbe417655a9eeefb030481a81a67840a63dd0e
68 lines
2.1 KiB
Python
68 lines
2.1 KiB
Python
# Copyright (c) 2013 Red Hat, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain 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,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import functools
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from zaqarclient import errors
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def version(min_version, max_version=None):
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min_version = float(min_version)
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max_version = max_version and float(max_version)
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error_msg = ('Method %(name)s is supported from version %(min)s '
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'to %(max)s')
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def method(meth):
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@functools.wraps(meth)
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def wrapper(self, *args, **kwargs):
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if (self.api_version < min_version or
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(max_version and self.api_version > max_version)):
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msg = error_msg % dict(name=str(meth),
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min=min_version,
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max=max_version or 'latest')
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raise errors.UnsupportedVersion(msg)
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return meth(self, *args, **kwargs)
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return wrapper
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return method
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def lazy_property(write=False, delete=True):
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"""Creates a lazy property.
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:param write: Whether this property is "writable"
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:param delete: Whether this property can be deleted.
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"""
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def wrapper(fn):
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attr_name = '_lazy_' + fn.__name__
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def getter(self):
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if not hasattr(self, attr_name):
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setattr(self, attr_name, fn(self))
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return getattr(self, attr_name)
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def setter(self, value):
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setattr(self, attr_name, value)
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def deleter(self):
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delattr(self, attr_name)
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return property(fget=getter,
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fset=write and setter,
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fdel=delete and deleter,
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doc=fn.__doc__)
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return wrapper
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