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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.
require 'uri'
require 'net/http'
require 'json'
module AWS
module Core
# Provides a mechnasim to discover available regions. This can useful if
# you want to perform an operation for a service in every region.
#
# # call the EC2 DescribeInstances operation in each region
# AWS.regions.each do |region|
# resp = region.ec2.client.describe_instances
# end
#
# You can also use this collection as a shortcut for creating
# a service interface with a given region.
#
# s3 = AWS.regions['us-west-1'].s3
#
# This collection enumerates and returns {Region} objects.
#
# @see Region
class RegionCollection
include Enumerable
# @option options [Configuration] :config (AWS.config)
# @option options [ServiceInterface] :service (nil)
# @api private
def initialize options = {}
@config = options[:config] || AWS.config
@service = options[:service]
end
# @return [Configuration]
attr_reader :config
# @param [String] name
# @return [Region] Returns a {Region} with the given name.
def [] name
Region.new(name, :config => config)
end
# Enumerates public regions (non US Gov regions).
# @yieldparam [region] Region
def each &block
public_regions.each do |region_name|
yield(self[region_name])
end
end
private
# @return [Array<String>] Returns an array of non-gov-cloud region names.
def public_regions
return ['us-east-1'] if @service and @service.global_endpoint?
data = Endpoints.endpoints
regions = @service ?
data['services'][@service.endpoint_prefix] :
data['regions'].keys
regions.reject{ |r| r =~ /us-gov/ }.reject{ |r| r =~ /^cn-/ }
end
end
end
end
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