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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 EC2
# Represents an EC2 availability zone. You can use this class
# to get information about the state of an availability zone
# that is available to your account.
#
# @attr_reader [String,nil] region_name Returns the region name
# of the availability zone.
#
# @attr_reader [Symbol] state Returns the state of the availability
# zone, e.g. `:available`.
#
# @attr_reader [Array<String>] messages Returns a list of messages about the
# Availability Zone.
#
class AvailabilityZone < Resource
# @param [String] name The name of the availability zone.
def initialize name, options = {}
@name = name
if options[:region]
options[:region_name] = options[:region].name
end
super
end
# @return [String] Returns the name of the availability zone,
# e.g. "us-west-2a".
attr_reader :name
alias_method :to_s, :name
alias_method :to_str, :name
attribute :region_name, :static => true
attribute :state, :from => :zone_state, :to_sym => true
attribute :messages, :from => :message_set do
translates_output do |messages|
messages ? messages.collect{|m| m.message } : []
end
end
populates_from(:describe_availability_zones) do |resp|
resp.availability_zone_info.find {|az| az.zone_name == name }
end
# @return [Region] Returns the region of this availability zone.
def region
Region.new(self.region_name, :config => config)
end
protected
def describe_call_name
:describe_availability_zones
end
protected
def inflected_name
self.class.inflected_name
end
protected
def self.inflected_name
"zone"
end
end
end
end
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