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
328 lines
10 KiB
Python
328 lines
10 KiB
Python
# Copyright (c) 2015 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 os.path
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import types
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from yaql.language import expressions as yaql_expressions
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from yaql.language import utils
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from yaql.language import yaqltypes
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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 helpers
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NO_VALUE = utils.create_marker('NO_VALUE')
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def name(dsl_name):
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def wrapper(cls):
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cls.__murano_name = dsl_name
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return cls
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return wrapper
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class MuranoType(yaqltypes.PythonType):
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def __init__(self, murano_class, nullable=False, version_spec=None):
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self.murano_class = murano_class
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self.version_spec = version_spec
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super(MuranoType, self).__init__(
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(dsl_types.MuranoObject, MuranoObjectInterface), nullable)
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def check(self, value, context, *args, **kwargs):
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if not super(MuranoType, self).check(
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value, context, *args, **kwargs):
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return False
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if isinstance(value, MuranoObjectInterface):
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value = value.object
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if value is None or isinstance(value, yaql_expressions.Expression):
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return True
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murano_class = self.murano_class
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if isinstance(murano_class, types.StringTypes):
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murano_class_name = murano_class
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else:
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murano_class_name = murano_class.name
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return helpers.is_instance_of(
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value, murano_class_name,
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self.version_spec or helpers.get_type(context))
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def convert(self, value, sender, context, function_spec, engine,
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*args, **kwargs):
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result = super(MuranoType, self).convert(
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value, sender, context, function_spec, engine, *args, **kwargs)
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if isinstance(result, dsl_types.MuranoObject):
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return MuranoObjectInterface(result)
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return result
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class ThisParameterType(yaqltypes.HiddenParameterType, yaqltypes.SmartType):
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def __init__(self):
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super(ThisParameterType, self).__init__(False)
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def convert(self, value, sender, context, function_spec, engine,
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*args, **kwargs):
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this = helpers.get_this(context)
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executor = helpers.get_executor(context)
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return MuranoObjectInterface(this, executor)
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class InterfacesParameterType(yaqltypes.HiddenParameterType,
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yaqltypes.SmartType):
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def __init__(self):
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super(InterfacesParameterType, self).__init__(False)
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def convert(self, value, sender, context, function_spec, engine,
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*args, **kwargs):
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this = helpers.get_this(context)
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return Interfaces(this)
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class MuranoTypeName(yaqltypes.LazyParameterType, yaqltypes.PythonType):
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def __init__(self, nullable=False, context=None):
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self._context = context
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super(MuranoTypeName, self).__init__(
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(dsl_types.MuranoClassReference,) + types.StringTypes, nullable)
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def convert(self, value, sender, context, function_spec, engine,
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*args, **kwargs):
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context = self._context or context
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if isinstance(value, yaql_expressions.Expression):
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value = value(utils.NO_VALUE, context, engine)
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value = super(MuranoTypeName, self).convert(
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value, sender, context, function_spec, engine)
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if isinstance(value, types.StringTypes):
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murano_type = helpers.get_type(context)
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value = dsl_types.MuranoClassReference(
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helpers.get_class(
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murano_type.namespace_resolver.resolve_name(
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value), context))
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return value
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class MuranoObjectInterface(dsl_types.MuranoObjectInterface):
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class DataInterface(object):
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def __init__(self, object_interface):
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object.__setattr__(self, '__object_interface', object_interface)
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def __getattr__(self, item):
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oi = getattr(self, '__object_interface')
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return oi[item]
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def __setattr__(self, key, value):
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oi = getattr(self, '__object_interface')
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oi[key] = value
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class CallInterface(object):
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def __init__(self, mpl_object, executor):
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self.__object = mpl_object
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self.__executor = executor
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def __getattr__(self, item):
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executor = self.__executor or helpers.get_executor()
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def func(*args, **kwargs):
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self._insert_instruction()
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return self.__object.type.invoke(
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item, executor, self.__object, args, kwargs,
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helpers.get_context())
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return func
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@staticmethod
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def _insert_instruction():
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context = helpers.get_context()
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if context:
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frame = inspect.stack()[2]
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location = dsl_types.ExpressionFilePosition(
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os.path.abspath(frame[1]), frame[2],
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-1, frame[2], -1)
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context[constants.CTX_CURRENT_INSTRUCTION] = NativeInstruction(
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frame[4][0].strip(), location)
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def __init__(self, mpl_object, executor=None):
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self.__object = mpl_object
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self.__executor = executor
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@property
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def object(self):
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return self.__object
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@property
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def id(self):
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return self.__object.object_id
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@property
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def owner(self):
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return self.__object.owner
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@property
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def type(self):
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return self.__object.type
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@property
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def package(self):
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return self.type.package
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def data(self):
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return MuranoObjectInterface.DataInterface(self)
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@property
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def extension(self):
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return self.__object.extension
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def cast(self, murano_class, version_spec=None):
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return MuranoObjectInterface(
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helpers.cast(
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self.__object, murano_class,
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version_spec or helpers.get_type()),
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self.__executor)
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def is_instance_of(self, murano_class, version_spec=None):
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return helpers.is_instance_of(
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self.__object, murano_class,
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version_spec or helpers.get_type())
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def ancestors(self):
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return self.type.ancestors()
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def __getitem__(self, item):
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context = helpers.get_context()
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return to_mutable(
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self.__object.get_property(item, context),
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helpers.get_yaql_engine(context))
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def __setitem__(self, key, value):
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context = helpers.get_context()
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value = helpers.evaluate(value, context)
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self.__object.set_property(key, value, context)
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def __call__(self):
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return MuranoObjectInterface.CallInterface(
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self.object, self.__executor)
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def __repr__(self):
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return '<{0}>'.format(repr(self.object))
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class YaqlInterface(object):
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def __init__(self, sender=utils.NO_VALUE):
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self.__sender = sender
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@property
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def context(self):
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return helpers.get_context()
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@property
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def engine(self):
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return helpers.get_yaql_engine(self.context)
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@property
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def sender(self):
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return self.__sender
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def on(self, sender):
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return YaqlInterface(sender)
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def __getattr__(self, item):
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def stub(*args, **kwargs):
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context = self.context
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args = tuple(helpers.evaluate(arg, context) for arg in args)
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kwargs = dict((key, helpers.evaluate(value, context))
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for key, value in kwargs.iteritems())
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return to_mutable(
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context(item, self.engine, self.sender)(*args, **kwargs),
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self.engine)
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return stub
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def __call__(self, __expression, *args, **kwargs):
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context = helpers.get_context().create_child_context()
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for i, param in enumerate(args):
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context['$' + str(i + 1)] = helpers.evaluate(param, context)
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for arg_name, arg_value in kwargs.iteritems():
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context['$' + arg_name] = helpers.evaluate(arg_value, context)
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parsed = self.engine(__expression)
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res = parsed.evaluate(context=context)
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return to_mutable(res, self.engine)
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def __getitem__(self, item):
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return helpers.get_context()[item]
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def __setitem__(self, key, value):
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helpers.get_context()[key] = value
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class Interfaces(object):
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def __init__(self, mpl_object):
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self.__object = mpl_object
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def yaql(self, sender=utils.NO_VALUE):
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return YaqlInterface(sender)
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def this(self):
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return self.methods(self.__object)
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def methods(self, mpl_object):
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if mpl_object is None:
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return None
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return MuranoObjectInterface(mpl_object)
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@property
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def environment(self):
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return helpers.get_environment()
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@property
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def caller(self):
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caller_context = helpers.get_caller_context()
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if caller_context is None:
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return None
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caller = helpers.get_this(caller_context)
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if caller is None:
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return None
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return MuranoObjectInterface(caller)
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@property
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def attributes(self):
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executor = helpers.get_executor()
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return executor.attribute_store
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@property
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def class_config(self):
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return self.__object.type.package.get_class_config(
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self.__object.type.name)
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@property
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def package_loader(self):
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return helpers.get_package_loader()
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class NativeInstruction(object):
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def __init__(self, instruction, location):
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self.instruction = instruction
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self.source_file_position = location
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def __str__(self):
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return self.instruction
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def to_mutable(obj, yaql_engine):
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def converter(value, limit_func, engine, rec):
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if isinstance(value, dsl_types.MuranoObject):
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return MuranoObjectInterface(value)
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else:
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return utils.convert_output_data(value, limit_func, engine, rec)
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limiter = lambda it: utils.limit_iterable(it, constants.ITERATORS_LIMIT)
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return converter(obj, limiter, yaql_engine, converter)
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