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#--
# Copyright:: Copyright 2017, Chef Software Inc.
# License:: Apache License, Version 2.0
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License 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.
#
class Chef
module Mixin
module VersionedAPI
def minimum_api_version(version = nil)
if version
@minimum_api_version = version
else
@minimum_api_version
end
end
end
module VersionedAPIFactory
def versioned_interfaces
@versioned_interfaces ||= []
end
def add_versioned_api_class(klass)
versioned_interfaces << klass
end
def versioned_api_class
get_class_for(:max_server_version)
end
def get_class_for(type)
versioned_interfaces.select do |klass|
version = klass.send(:minimum_api_version)
# min and max versions will be nil if we've not made a request to the server yet,
# in which case we'll just start with the highest version and see what happens
ServerAPIVersions.instance.min_server_version.nil? || (version >= ServerAPIVersions.instance.min_server_version && version <= ServerAPIVersions.instance.send(type))
end
.sort { |a, b| a.send(:minimum_api_version) <=> b.send(:minimum_api_version) }
.last
end
def def_versioned_delegator(method)
line_no = __LINE__; str = %{
def self.#{method}(*args, &block)
versioned_api_class.__send__(:#{method}, *args, &block)
end
}
module_eval(str, __FILE__, line_no)
end
# When teeing up an HTTP request, we need to be able to ask which API version we should use.
# Something in Net::HTTP seems to expect to strip headers, so we return this as a string.
def best_request_version
klass = get_class_for(:max_server_version)
klass.minimum_api_version.to_s
end
def possible_requests
versioned_interfaces.length
end
def new(*args)
object = versioned_api_class.allocate
object.send(:initialize, *args)
object
end
end
end
end
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