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# Copyright 2011-2013 Amazon.com, Inc. or its affiliates. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"). You
# may not use this file except in compliance with the License. A copy of
# the License is located at
#
# http://aws.amazon.com/apache2.0/
#
# or in the "license" file accompanying this file. This file is
# distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF
# ANY KIND, either express or implied. See the License for the specific
# language governing permissions and limitations under the License.
module AWS
class CloudFormation
# @attr_reader [String,nil] description
# User defined description associated with the resource.
#
# @attr_reader [String] physical_resource_id
# The name or unique identifier that corresponds to a physical instance
# ID of a resource supported by AWS CloudFormation.
#
# @attr_reader [Symbol] resource_status
# Current status of the resource.
#
# @attr_reader [String,nil] resource_status_reason
# Success/failure message associated with the resource.
#
# @attr_reader [String] resource_type
# Type of the resource (e.g. 'AWS::EC2::Instance')
#
# @attr_reader [String] stack_name
# The name associated with the stack.
#
# @attr_reader [String] stack_id
# Unique identifier of the stack.
#
# @attr_reader [Time] last_updated_timestamp
# When the status was last updated.
#
# @attr_reader [String,nil] metadata
# The JSON format content of the Metadata attribute declared for the
# resource.
#
class StackResource < Core::Resource
# @api private
def initialize stack, logical_resource_id, options = {}
@stack = stack
@logical_resource_id = logical_resource_id
super
end
# @return [Stack]
attr_reader :stack
# @return [String] The logical name of the resource specified in
# the template.
attr_reader :logical_resource_id
define_attribute_type :common # return by both describe stack resource methods
define_attribute_type :detail # returned by DescribeStackResource (singular)
common_attribute :description, :static => true
common_attribute :physical_resource_id, :static => true
common_attribute :resource_status
common_attribute :resource_status_reason
common_attribute :resource_type, :static => true
common_attribute :stack_name, :static => true
common_attribute :stack_id, :static => true
# provided by DescribeStackResource
detail_attribute :last_updated_timestamp
detail_attribute :metadata
# this operation returns all attributes
populates_from(:describe_stack_resource) do |resp|
resp.stack_resource_detail if
resp.stack_resource_detail.logical_resource_id == logical_resource_id
end
# This method provides ALL attributes except :metadata. The
# :last_updated_timestamp attribute is also provided by
# a differnt name (:timestamp instead of :last_updated_timestamp).
provider(:describe_stack_resources) do |provider|
provider.find do |resp|
resp.stack_resources.find do |resource|
resource.logical_resource_id == logical_resource_id
end
end
provider.provides *common_attributes.keys
provider.provides :last_updated_timestamp, :from => :timestamp
end
protected
def resource_identifiers
[[:stack_name, stack.name], [:logical_resource_id, logical_resource_id]]
end
def get_resource attribute = nil
client.describe_stack_resource(resource_options)
end
end
end
end
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