623 lines
20 KiB
Python
623 lines
20 KiB
Python
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# Copyright 2014 Amazon.com, Inc. or its affiliates. All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"). You
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# may not use this file except in compliance with the License. A copy of
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# the License is located at
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#
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# http://aws.amazon.com/apache2.0/
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#
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# or in the "license" file accompanying this file. This file is
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# distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF
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# ANY KIND, either express or implied. See the License for the specific
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# language governing permissions and limitations under the License.
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"""
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The models defined in this file represent the resource JSON description
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format and provide a layer of abstraction from the raw JSON. The advantages
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of this are:
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* Pythonic interface (e.g. ``action.request.operation``)
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* Consumers need not change for minor JSON changes (e.g. renamed field)
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These models are used both by the resource factory to generate resource
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classes as well as by the documentation generator.
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"""
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import logging
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from botocore import xform_name
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logger = logging.getLogger(__name__)
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class Identifier(object):
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"""
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A resource identifier, given by its name.
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:type name: string
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:param name: The name of the identifier
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"""
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def __init__(self, name, member_name=None):
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#: (``string``) The name of the identifier
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self.name = name
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self.member_name = member_name
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class Action(object):
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"""
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A service operation action.
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:type name: string
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:param name: The name of the action
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:type definition: dict
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:param definition: The JSON definition
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:type resource_defs: dict
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:param resource_defs: All resources defined in the service
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"""
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def __init__(self, name, definition, resource_defs):
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self._definition = definition
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#: (``string``) The name of the action
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self.name = name
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#: (:py:class:`Request`) This action's request or ``None``
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self.request = None
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if 'request' in definition:
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self.request = Request(definition.get('request', {}))
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#: (:py:class:`ResponseResource`) This action's resource or ``None``
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self.resource = None
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if 'resource' in definition:
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self.resource = ResponseResource(definition.get('resource', {}),
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resource_defs)
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#: (``string``) The JMESPath search path or ``None``
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self.path = definition.get('path')
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class DefinitionWithParams(object):
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"""
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An item which has parameters exposed via the ``params`` property.
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A request has an operation and parameters, while a waiter has
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a name, a low-level waiter name and parameters.
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:type definition: dict
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:param definition: The JSON definition
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"""
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def __init__(self, definition):
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self._definition = definition
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@property
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def params(self):
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"""
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Get a list of auto-filled parameters for this request.
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:type: list(:py:class:`Parameter`)
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"""
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params = []
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for item in self._definition.get('params', []):
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params.append(Parameter(**item))
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return params
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class Parameter(object):
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"""
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An auto-filled parameter which has a source and target. For example,
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the ``QueueUrl`` may be auto-filled from a resource's ``url`` identifier
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when making calls to ``queue.receive_messages``.
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:type target: string
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:param target: The destination parameter name, e.g. ``QueueUrl``
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:type source_type: string
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:param source_type: Where the source is defined.
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:type source: string
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:param source: The source name, e.g. ``Url``
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"""
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def __init__(self, target, source, name=None, path=None, value=None,
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**kwargs):
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#: (``string``) The destination parameter name
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self.target = target
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#: (``string``) Where the source is defined
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self.source = source
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#: (``string``) The name of the source, if given
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self.name = name
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#: (``string``) The JMESPath query of the source
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self.path = path
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#: (``string|int|float|bool``) The source constant value
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self.value = value
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# Complain if we encounter any unknown values.
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if kwargs:
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logger.warning('Unknown parameter options found: %s', kwargs)
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class Request(DefinitionWithParams):
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"""
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A service operation action request.
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:type definition: dict
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:param definition: The JSON definition
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"""
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def __init__(self, definition):
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super(Request, self).__init__(definition)
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#: (``string``) The name of the low-level service operation
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self.operation = definition.get('operation')
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class Waiter(DefinitionWithParams):
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"""
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An event waiter specification.
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:type name: string
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:param name: Name of the waiter
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:type definition: dict
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:param definition: The JSON definition
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"""
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PREFIX = 'WaitUntil'
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def __init__(self, name, definition):
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super(Waiter, self).__init__(definition)
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#: (``string``) The name of this waiter
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self.name = name
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#: (``string``) The name of the underlying event waiter
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self.waiter_name = definition.get('waiterName')
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class ResponseResource(object):
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"""
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A resource response to create after performing an action.
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:type definition: dict
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:param definition: The JSON definition
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:type resource_defs: dict
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:param resource_defs: All resources defined in the service
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"""
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def __init__(self, definition, resource_defs):
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self._definition = definition
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self._resource_defs = resource_defs
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#: (``string``) The name of the response resource type
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self.type = definition.get('type')
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#: (``string``) The JMESPath search query or ``None``
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self.path = definition.get('path')
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@property
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def identifiers(self):
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"""
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A list of resource identifiers.
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:type: list(:py:class:`Identifier`)
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"""
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identifiers = []
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for item in self._definition.get('identifiers', []):
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identifiers.append(
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Parameter(**item))
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return identifiers
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@property
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def model(self):
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"""
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Get the resource model for the response resource.
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:type: :py:class:`ResourceModel`
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"""
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return ResourceModel(self.type, self._resource_defs[self.type],
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self._resource_defs)
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class Collection(Action):
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"""
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A group of resources. See :py:class:`Action`.
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:type name: string
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:param name: The name of the collection
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:type definition: dict
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:param definition: The JSON definition
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:type resource_defs: dict
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:param resource_defs: All resources defined in the service
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"""
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@property
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def batch_actions(self):
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"""
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Get a list of batch actions supported by the resource type
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contained in this action. This is a shortcut for accessing
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the same information through the resource model.
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:rtype: list(:py:class:`Action`)
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"""
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return self.resource.model.batch_actions
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class ResourceModel(object):
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"""
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A model representing a resource, defined via a JSON description
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format. A resource has identifiers, attributes, actions,
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sub-resources, references and collections. For more information
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on resources, see :ref:`guide_resources`.
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:type name: string
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:param name: The name of this resource, e.g. ``sqs`` or ``Queue``
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:type definition: dict
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:param definition: The JSON definition
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:type resource_defs: dict
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:param resource_defs: All resources defined in the service
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"""
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def __init__(self, name, definition, resource_defs):
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self._definition = definition
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self._resource_defs = resource_defs
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self._renamed = {}
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#: (``string``) The name of this resource
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self.name = name
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#: (``string``) The service shape name for this resource or ``None``
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self.shape = definition.get('shape')
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def load_rename_map(self, shape=None):
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"""
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Load a name translation map given a shape. This will set
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up renamed values for any collisions, e.g. if the shape,
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an action, and a subresource all are all named ``foo``
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then the resource will have an action ``foo``, a subresource
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named ``Foo`` and a property named ``foo_attribute``.
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This is the order of precedence, from most important to
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least important:
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* Load action (resource.load)
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* Identifiers
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* Actions
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* Subresources
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* References
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* Collections
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* Waiters
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* Attributes (shape members)
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Batch actions are only exposed on collections, so do not
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get modified here. Subresources use upper camel casing, so
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are unlikely to collide with anything but other subresources.
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Creates a structure like this::
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renames = {
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('action', 'id'): 'id_action',
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('collection', 'id'): 'id_collection',
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('attribute', 'id'): 'id_attribute'
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}
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# Get the final name for an action named 'id'
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name = renames.get(('action', 'id'), 'id')
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:type shape: botocore.model.Shape
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:param shape: The underlying shape for this resource.
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"""
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# Meta is a reserved name for resources
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names = set(['meta'])
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self._renamed = {}
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if self._definition.get('load'):
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names.add('load')
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for item in self._definition.get('identifiers', []):
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self._load_name_with_category(names, item['name'], 'identifier')
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for name in self._definition.get('actions', {}):
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self._load_name_with_category(names, name, 'action')
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for name, ref in self._get_has_definition().items():
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# Subresources require no data members, just typically
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# identifiers and user input.
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data_required = False
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for identifier in ref['resource']['identifiers']:
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if identifier['source'] == 'data':
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data_required = True
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break
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if not data_required:
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self._load_name_with_category(names, name, 'subresource',
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snake_case=False)
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else:
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self._load_name_with_category(names, name, 'reference')
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for name in self._definition.get('hasMany', {}):
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self._load_name_with_category(names, name, 'collection')
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for name in self._definition.get('waiters', {}):
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self._load_name_with_category(names, Waiter.PREFIX + name,
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'waiter')
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if shape is not None:
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for name in shape.members.keys():
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self._load_name_with_category(names, name, 'attribute')
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def _load_name_with_category(self, names, name, category,
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snake_case=True):
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"""
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Load a name with a given category, possibly renaming it
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if that name is already in use. The name will be stored
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in ``names`` and possibly be set up in ``self._renamed``.
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:type names: set
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:param names: Existing names (Python attributes, properties, or
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methods) on the resource.
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:type name: string
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:param name: The original name of the value.
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:type category: string
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:param category: The value type, such as 'identifier' or 'action'
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:type snake_case: bool
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:param snake_case: True (default) if the name should be snake cased.
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"""
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if snake_case:
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name = xform_name(name)
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if name in names:
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logger.debug('Renaming %s %s %s' % (self.name, category, name))
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self._renamed[(category, name)] = name + '_' + category
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name += '_' + category
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if name in names:
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# This isn't good, let's raise instead of trying to keep
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# renaming this value.
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raise ValueError('Problem renaming {0} {1} to {2}!'.format(
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self.name, category, name))
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names.add(name)
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def _get_name(self, category, name, snake_case=True):
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"""
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Get a possibly renamed value given a category and name. This
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uses the rename map set up in ``load_rename_map``, so that
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method must be called once first.
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:type category: string
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:param category: The value type, such as 'identifier' or 'action'
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:type name: string
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:param name: The original name of the value
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:type snake_case: bool
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:param snake_case: True (default) if the name should be snake cased.
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:rtype: string
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:return: Either the renamed value if it is set, otherwise the
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original name.
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"""
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if snake_case:
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name = xform_name(name)
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return self._renamed.get((category, name), name)
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def get_attributes(self, shape):
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"""
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Get a dictionary of attribute names to original name and shape
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models that represent the attributes of this resource. Looks
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like the following:
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{
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'some_name': ('SomeName', <Shape...>)
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}
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||
|
|
:type shape: botocore.model.Shape
|
||
|
|
:param shape: The underlying shape for this resource.
|
||
|
|
:rtype: dict
|
||
|
|
:return: Mapping of resource attributes.
|
||
|
|
"""
|
||
|
|
attributes = {}
|
||
|
|
identifier_names = [i.name for i in self.identifiers]
|
||
|
|
|
||
|
|
for name, member in shape.members.items():
|
||
|
|
snake_cased = xform_name(name)
|
||
|
|
if snake_cased in identifier_names:
|
||
|
|
# Skip identifiers, these are set through other means
|
||
|
|
continue
|
||
|
|
snake_cased = self._get_name('attribute', snake_cased,
|
||
|
|
snake_case=False)
|
||
|
|
attributes[snake_cased] = (name, member)
|
||
|
|
|
||
|
|
return attributes
|
||
|
|
|
||
|
|
@property
|
||
|
|
def identifiers(self):
|
||
|
|
"""
|
||
|
|
Get a list of resource identifiers.
|
||
|
|
|
||
|
|
:type: list(:py:class:`Identifier`)
|
||
|
|
"""
|
||
|
|
identifiers = []
|
||
|
|
|
||
|
|
for item in self._definition.get('identifiers', []):
|
||
|
|
name = self._get_name('identifier', item['name'])
|
||
|
|
member_name = item.get('memberName', None)
|
||
|
|
if member_name:
|
||
|
|
member_name = self._get_name('attribute', member_name)
|
||
|
|
identifiers.append(Identifier(name, member_name))
|
||
|
|
|
||
|
|
return identifiers
|
||
|
|
|
||
|
|
@property
|
||
|
|
def load(self):
|
||
|
|
"""
|
||
|
|
Get the load action for this resource, if it is defined.
|
||
|
|
|
||
|
|
:type: :py:class:`Action` or ``None``
|
||
|
|
"""
|
||
|
|
action = self._definition.get('load')
|
||
|
|
|
||
|
|
if action is not None:
|
||
|
|
action = Action('load', action, self._resource_defs)
|
||
|
|
|
||
|
|
return action
|
||
|
|
|
||
|
|
@property
|
||
|
|
def actions(self):
|
||
|
|
"""
|
||
|
|
Get a list of actions for this resource.
|
||
|
|
|
||
|
|
:type: list(:py:class:`Action`)
|
||
|
|
"""
|
||
|
|
actions = []
|
||
|
|
|
||
|
|
for name, item in self._definition.get('actions', {}).items():
|
||
|
|
name = self._get_name('action', name)
|
||
|
|
actions.append(Action(name, item, self._resource_defs))
|
||
|
|
|
||
|
|
return actions
|
||
|
|
|
||
|
|
@property
|
||
|
|
def batch_actions(self):
|
||
|
|
"""
|
||
|
|
Get a list of batch actions for this resource.
|
||
|
|
|
||
|
|
:type: list(:py:class:`Action`)
|
||
|
|
"""
|
||
|
|
actions = []
|
||
|
|
|
||
|
|
for name, item in self._definition.get('batchActions', {}).items():
|
||
|
|
name = self._get_name('batch_action', name)
|
||
|
|
actions.append(Action(name, item, self._resource_defs))
|
||
|
|
|
||
|
|
return actions
|
||
|
|
|
||
|
|
def _get_has_definition(self):
|
||
|
|
"""
|
||
|
|
Get a ``has`` relationship definition from a model, where the
|
||
|
|
service resource model is treated special in that it contains
|
||
|
|
a relationship to every resource defined for the service. This
|
||
|
|
allows things like ``s3.Object('bucket-name', 'key')`` to
|
||
|
|
work even though the JSON doesn't define it explicitly.
|
||
|
|
|
||
|
|
:rtype: dict
|
||
|
|
:return: Mapping of names to subresource and reference
|
||
|
|
definitions.
|
||
|
|
"""
|
||
|
|
if self.name not in self._resource_defs:
|
||
|
|
# This is the service resource, so let us expose all of
|
||
|
|
# the defined resources as subresources.
|
||
|
|
definition = {}
|
||
|
|
|
||
|
|
for name, resource_def in self._resource_defs.items():
|
||
|
|
# It's possible for the service to have renamed a
|
||
|
|
# resource or to have defined multiple names that
|
||
|
|
# point to the same resource type, so we need to
|
||
|
|
# take that into account.
|
||
|
|
found = False
|
||
|
|
has_items = self._definition.get('has', {}).items()
|
||
|
|
for has_name, has_def in has_items:
|
||
|
|
if has_def.get('resource', {}).get('type') == name:
|
||
|
|
definition[has_name] = has_def
|
||
|
|
found = True
|
||
|
|
|
||
|
|
if not found:
|
||
|
|
# Create a relationship definition and attach it
|
||
|
|
# to the model, such that all identifiers must be
|
||
|
|
# supplied by the user. It will look something like:
|
||
|
|
#
|
||
|
|
# {
|
||
|
|
# 'resource': {
|
||
|
|
# 'type': 'ResourceName',
|
||
|
|
# 'identifiers': [
|
||
|
|
# {'target': 'Name1', 'source': 'input'},
|
||
|
|
# {'target': 'Name2', 'source': 'input'},
|
||
|
|
# ...
|
||
|
|
# ]
|
||
|
|
# }
|
||
|
|
# }
|
||
|
|
#
|
||
|
|
fake_has = {
|
||
|
|
'resource': {
|
||
|
|
'type': name,
|
||
|
|
'identifiers': []
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
for identifier in resource_def.get('identifiers', []):
|
||
|
|
fake_has['resource']['identifiers'].append({
|
||
|
|
'target': identifier['name'], 'source': 'input'
|
||
|
|
})
|
||
|
|
|
||
|
|
definition[name] = fake_has
|
||
|
|
else:
|
||
|
|
definition = self._definition.get('has', {})
|
||
|
|
|
||
|
|
return definition
|
||
|
|
|
||
|
|
def _get_related_resources(self, subresources):
|
||
|
|
"""
|
||
|
|
Get a list of sub-resources or references.
|
||
|
|
|
||
|
|
:type subresources: bool
|
||
|
|
:param subresources: ``True`` to get sub-resources, ``False`` to
|
||
|
|
get references.
|
||
|
|
:rtype: list(:py:class:`ResponseResource`)
|
||
|
|
"""
|
||
|
|
resources = []
|
||
|
|
|
||
|
|
for name, definition in self._get_has_definition().items():
|
||
|
|
if subresources:
|
||
|
|
name = self._get_name('subresource', name, snake_case=False)
|
||
|
|
else:
|
||
|
|
name = self._get_name('reference', name)
|
||
|
|
action = Action(name, definition, self._resource_defs)
|
||
|
|
|
||
|
|
data_required = False
|
||
|
|
for identifier in action.resource.identifiers:
|
||
|
|
if identifier.source == 'data':
|
||
|
|
data_required = True
|
||
|
|
break
|
||
|
|
|
||
|
|
if subresources and not data_required:
|
||
|
|
resources.append(action)
|
||
|
|
elif not subresources and data_required:
|
||
|
|
resources.append(action)
|
||
|
|
|
||
|
|
return resources
|
||
|
|
|
||
|
|
@property
|
||
|
|
def subresources(self):
|
||
|
|
"""
|
||
|
|
Get a list of sub-resources.
|
||
|
|
|
||
|
|
:type: list(:py:class:`ResponseResource`)
|
||
|
|
"""
|
||
|
|
return self._get_related_resources(True)
|
||
|
|
|
||
|
|
@property
|
||
|
|
def references(self):
|
||
|
|
"""
|
||
|
|
Get a list of reference resources.
|
||
|
|
|
||
|
|
:type: list(:py:class:`ResponseResource`)
|
||
|
|
"""
|
||
|
|
return self._get_related_resources(False)
|
||
|
|
|
||
|
|
@property
|
||
|
|
def collections(self):
|
||
|
|
"""
|
||
|
|
Get a list of collections for this resource.
|
||
|
|
|
||
|
|
:type: list(:py:class:`Collection`)
|
||
|
|
"""
|
||
|
|
collections = []
|
||
|
|
|
||
|
|
for name, item in self._definition.get('hasMany', {}).items():
|
||
|
|
name = self._get_name('collection', name)
|
||
|
|
collections.append(Collection(name, item, self._resource_defs))
|
||
|
|
|
||
|
|
return collections
|
||
|
|
|
||
|
|
@property
|
||
|
|
def waiters(self):
|
||
|
|
"""
|
||
|
|
Get a list of waiters for this resource.
|
||
|
|
|
||
|
|
:type: list(:py:class:`Waiter`)
|
||
|
|
"""
|
||
|
|
waiters = []
|
||
|
|
|
||
|
|
for name, item in self._definition.get('waiters', {}).items():
|
||
|
|
name = self._get_name('waiter', Waiter.PREFIX + name)
|
||
|
|
waiters.append(Waiter(name, item))
|
||
|
|
|
||
|
|
return waiters
|