580677eedc
1.As mentioned in [1], we should avoid using six.iteritems to achieve iterators. We can use dict.items instead, as it will return iterators in PY3 as well. And dict.items/keys will more readable. 2.In py2, the performance about list should be negligible, see the link [2]. [1] https://wiki.openstack.org/wiki/Python3 [2] http://lists.openstack.org/pipermail/openstack-dev/2015-June/066391.html Change-Id: I45fa65427318e1c35bb521de46e81ea12ca7b770
235 lines
8.8 KiB
Python
235 lines
8.8 KiB
Python
# Copyright (c) 2014 Mirantis, Inc.
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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 inspect
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import warnings
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import weakref
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import debtcollector
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import semantic_version
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import six
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from yaql.language import specs
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from yaql.language import utils
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from murano.dsl import constants
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from murano.dsl import dsl_types
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from murano.dsl import exceptions
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from murano.dsl import helpers
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from murano.dsl import meta as dslmeta
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from murano.dsl import murano_object
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from murano.dsl import murano_type
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from murano.dsl import namespace_resolver
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from murano.dsl import principal_objects
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from murano.dsl import yaql_integration
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class MuranoPackage(dsl_types.MuranoPackage, dslmeta.MetaProvider):
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def __init__(self, package_loader, name, version=None,
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runtime_version=None, requirements=None, meta=None):
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super(MuranoPackage, self).__init__()
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self._package_loader = weakref.proxy(package_loader)
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self._name = name
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self._version = helpers.parse_version(version)
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self._runtime_version = helpers.parse_version(runtime_version)
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self._requirements = {
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name: semantic_version.Spec('==' + str(self._version.major))
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}
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if name != constants.CORE_LIBRARY:
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self._requirements[constants.CORE_LIBRARY] = \
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semantic_version.Spec('==0')
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self._classes = {}
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self._imported_types = {object, murano_object.MuranoObject}
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for key, value in (requirements or {}).items():
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self._requirements[key] = helpers.parse_version_spec(value)
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self._load_queue = {}
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self._native_load_queue = {}
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if self.name == constants.CORE_LIBRARY:
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principal_objects.register(self)
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self._package_class = self._create_package_class()
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self._meta = lambda: dslmeta.MetaData(
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meta, dsl_types.MetaTargets.Package, self._package_class)
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@property
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def package_loader(self):
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return self._package_loader
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@property
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def name(self):
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return self._name
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@property
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def version(self):
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return self._version
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@property
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def runtime_version(self):
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return self._runtime_version
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@property
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def requirements(self):
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return self._requirements
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@property
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def classes(self):
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return set(self._classes.keys()).union(
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self._load_queue.keys()).union(self._native_load_queue.keys())
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def get_resource(self, name):
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raise NotImplementedError('resource API is not implemented')
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# noinspection PyMethodMayBeStatic
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def get_class_config(self, name):
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return {}
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def _register_mpl_classes(self, data, name=None):
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type_obj = self._classes.get(name)
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if type_obj is not None:
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return type_obj
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if callable(data):
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data = data()
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data = helpers.list_value(data)
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unnamed_class = None
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last_ns = {}
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for cls_data in data:
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last_ns = cls_data.setdefault('Namespaces', last_ns.copy())
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if len(cls_data) == 1:
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continue
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cls_name = cls_data.get('Name')
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if not cls_name:
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if unnamed_class:
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raise exceptions.AmbiguousClassName(name)
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unnamed_class = cls_data
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else:
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ns_resolver = namespace_resolver.NamespaceResolver(last_ns)
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cls_name = ns_resolver.resolve_name(cls_name)
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if cls_name == name:
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type_obj = murano_type.create(
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cls_data, self, cls_name, ns_resolver)
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self._classes[name] = type_obj
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else:
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self._load_queue.setdefault(cls_name, cls_data)
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if type_obj is None and unnamed_class:
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unnamed_class['Name'] = name
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return self._register_mpl_classes(unnamed_class, name)
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return type_obj
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def _register_native_class(self, cls, name):
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if cls in self._imported_types:
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return self._classes[name]
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try:
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m_class = self.find_class(name, False)
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except exceptions.NoClassFound:
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m_class = self._register_mpl_classes({'Name': name}, name)
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m_class.extension_class = cls
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for method_name in dir(cls):
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if method_name.startswith('_'):
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continue
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method = getattr(cls, method_name)
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if not any((
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helpers.inspect_is_method(cls, method_name),
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helpers.inspect_is_static(cls, method_name),
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helpers.inspect_is_classmethod(cls, method_name))):
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continue
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method_name_alias = (getattr(
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method, '__murano_name', None) or
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specs.convert_function_name(
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method_name, yaql_integration.CONVENTION))
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m_class.add_method(method_name_alias, method, method_name)
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self._imported_types.add(cls)
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return m_class
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def register_class(self, cls, name=None):
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if inspect.isclass(cls):
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name = name or getattr(cls, '__murano_name', None) or cls.__name__
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if name in self._classes:
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self._register_native_class(cls, name)
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else:
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self._native_load_queue.setdefault(name, cls)
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elif isinstance(cls, dsl_types.MuranoType):
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self._classes[cls.name] = cls
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elif name not in self._classes:
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self._load_queue[name] = cls
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def find_class(self, name, search_requirements=True):
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payload = self._native_load_queue.pop(name, None)
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if payload is not None:
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return self._register_native_class(payload, name)
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payload = self._load_queue.pop(name, None)
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if payload is not None:
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result = self._register_mpl_classes(payload, name)
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if result:
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return result
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result = self._classes.get(name)
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if result:
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return result
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if search_requirements:
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pkgs_for_search = []
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for package_name, version_spec in self._requirements.items():
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if package_name == self.name:
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continue
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referenced_package = self._package_loader.load_package(
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package_name, version_spec)
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try:
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return referenced_package.find_class(name, False)
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except exceptions.NoClassFound:
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if name.startswith('io.murano.extensions'):
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try:
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short_name = name.replace(
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'io.murano.extensions.', '', 1)
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result = referenced_package.find_class(
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short_name, False)
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warnings.simplefilter("once")
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msg = ("Plugin %(name)s was not found, but a "
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"%(shorter_name)s was found instead and "
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"will be used. This could be caused by "
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"recent change in plugin naming scheme. If "
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"you are developing applications targeting "
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"this plugin consider changing its name" %
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{'name': name, 'shorter_name': short_name})
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debtcollector.deprecate(msg)
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return result
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except exceptions.NoClassFound:
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pass
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pkgs_for_search.append(referenced_package)
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continue
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raise exceptions.NoClassFound(
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name, packages=pkgs_for_search + [self])
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raise exceptions.NoClassFound(name, packages=[self])
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@property
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def context(self):
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return None
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def _create_package_class(self):
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ns_resolver = namespace_resolver.NamespaceResolver(None)
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return murano_type.MuranoClass(
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ns_resolver, self.name, self, utils.NO_VALUE)
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def get_meta(self, context):
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if six.callable(self._meta):
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executor = helpers.get_executor()
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context = executor.create_package_context(self)
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self._meta = self._meta().get_meta(context)
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return self._meta
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def __repr__(self):
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return 'MuranoPackage({name})'.format(name=self.name)
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