0a835b87f0
ObjectStore is a container for all of the objects that are either loaded from object model or created at runtime. Thus ObjectStore instance is required in order to either use new() function or use class() contract with object model snippet. In current implementation each object had a object_store property that was pointing to the ObjectStore instance used to create it (the one that has the object). In order to create new object an ObjectStore of the $this object was used for that purpose. This approach caused several issues: * There is no $this object in static methods and thus no way to obtain current ObjectStore * Objects are bind to their stores so temporary ObjectStore instances cannot be used to load object graphs This refactoring moves ObjectStore instances to the thread-local attribute. Thus there is always a "current" ObjectStore. Also because ObjectStore has a reference to the MuranoDslExecutor instance it becomes possible to get current executor and everything else that it contains (current execution session, attribute store, package loader) from the local thread storage without passing it in the hidden context variables. Change-Id: I19a08b391486c1ae1b98ca559c8d3fafaca6e1ef
84 lines
3.0 KiB
Python
84 lines
3.0 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 sys
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import weakref
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import six
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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
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from murano.dsl import typespec
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class MuranoProperty(dsl_types.MuranoProperty, typespec.Spec,
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meta.MetaProvider):
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def __init__(self, declaring_type, property_name, declaration):
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super(MuranoProperty, self).__init__(declaration, declaring_type)
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self._property_name = property_name
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self._declaring_type = weakref.ref(declaring_type)
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self._usage = declaration.get('Usage') or dsl_types.PropertyUsages.In
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if self._usage not in dsl_types.PropertyUsages.All:
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raise exceptions.DslSyntaxError(
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'Unknown usage {0}. Must be one of ({1})'.format(
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self._usage, ', '.join(dsl_types.PropertyUsages.All)))
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self._meta = meta.MetaData(
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declaration.get('Meta'),
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dsl_types.MetaTargets.Property, declaring_type)
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self._meta_values = None
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def transform(self, *args, **kwargs):
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try:
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return super(MuranoProperty, self).transform(*args, **kwargs)
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except exceptions.ContractViolationException as e:
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msg = u'[{0}.{1}{2}] {3}'.format(
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self.declaring_type.name, self.name, e.path, six.text_type(e))
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six.reraise(exceptions.ContractViolationException,
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exceptions.ContractViolationException(msg),
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sys.exc_info()[2])
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@property
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def declaring_type(self):
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return self._declaring_type()
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@property
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def name(self):
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return self._property_name
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@property
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def usage(self):
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return self._usage
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def get_meta(self, context):
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def meta_producer(cls):
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prop = cls.properties.get(self.name)
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if prop is None:
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return None
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return prop._meta
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if self._meta_values is None:
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executor = helpers.get_executor()
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context = executor.create_type_context(
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self.declaring_type, caller_context=context)
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self._meta_values = meta.merge_providers(
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self.declaring_type, meta_producer, context)
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return self._meta_values
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def __repr__(self):
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return 'MuranoProperty({type}::{name})'.format(
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type=self.declaring_type.name, name=self.name)
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