16030aeec8
This commit reworks mechanism how context chain is built at each point. The goal was to make entire chain be dependent on format version number. This would allow for example to use yaql 1.0 legacy mode context for MuranoPL/1.0 and not to use it for 2.0. Not the entire chain is built on demand up to the root instead of attaching to existed parent context as it was before. DSL host (engine) is no more required to have custom MuranoDslExecutor implementation but a new ContextManager interface that is used to control contexts on each layer. Engine uses this interface to register system classes and engine level yaql functions. Also a ContextManager is a foundation for method mocking because now all MuranoPL methods are yaql functions stored in context and with ContextManager it is possible to inject/replace function in each scope ( global, package, class, object) Partially implements: blueprint murano-versioning Change-Id: I0a553e8044061fe780a83bc04d70b8f80580988f
117 lines
3.9 KiB
Python
117 lines
3.9 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 collections
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import types
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import weakref
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from yaql.language import specs
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from murano.dsl import dsl
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from murano.dsl import dsl_types
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from murano.dsl import macros
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from murano.dsl import typespec
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from murano.dsl import virtual_exceptions
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from murano.dsl import yaql_integration
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macros.register()
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virtual_exceptions.register()
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class MethodUsages(object):
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Action = 'Action'
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Runtime = 'Runtime'
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All = set([Action, Runtime])
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class MuranoMethod(dsl_types.MuranoMethod):
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def __init__(self, murano_class, name, payload):
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self._name = name
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self._murano_class = weakref.ref(murano_class)
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if callable(payload):
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if isinstance(payload, specs.FunctionDefinition):
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self._body = payload
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else:
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self._body = yaql_integration.get_function_definition(payload)
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self._arguments_scheme = None
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self._usage = (self._body.meta.get('usage') or
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self._body.meta.get('Usage') or
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MethodUsages.Runtime)
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if (self._body.name.startswith('#')
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or self._body.name.startswith('*')):
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raise ValueError(
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'Import of special yaql functions is forbidden')
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else:
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payload = payload or {}
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self._body = macros.MethodBlock(payload.get('Body') or [], name)
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self._usage = payload.get('Usage') or MethodUsages.Runtime
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arguments_scheme = payload.get('Arguments') or []
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if isinstance(arguments_scheme, types.DictionaryType):
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arguments_scheme = [{key: value} for key, value in
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arguments_scheme.iteritems()]
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self._arguments_scheme = collections.OrderedDict()
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for record in arguments_scheme:
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if (not isinstance(record, types.DictionaryType)
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or len(record) > 1):
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raise ValueError()
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name = record.keys()[0]
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self._arguments_scheme[name] = typespec.ArgumentSpec(
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record[name], self.murano_class)
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self._yaql_function_definition = \
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yaql_integration.build_wrapper_function_definition(self)
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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 murano_class(self):
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return self._murano_class()
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@property
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def arguments_scheme(self):
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return self._arguments_scheme
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@property
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def yaql_function_definition(self):
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return self._yaql_function_definition
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@property
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def usage(self):
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return self._usage
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@usage.setter
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def usage(self, value):
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self._usage = value
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@property
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def body(self):
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return self._body
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def __repr__(self):
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return 'MuranoMethod({0}::{1})'.format(
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self.murano_class.name, self.name)
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def invoke(self, executor, this, args, kwargs, context=None,
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skip_stub=False):
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if not self.murano_class.is_compatible(this):
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raise Exception("'this' must be of compatible type")
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if isinstance(this, dsl.MuranoObjectInterface):
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this = this.object
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return executor.invoke_method(
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self, this.cast(self.murano_class),
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context, args, kwargs, skip_stub)
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