87 lines
2.9 KiB
Ruby
87 lines
2.9 KiB
Ruby
#
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# Author:: Seth Chisamore <schisamo@chef.io>
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# Cookbook Name:: chef_handler
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# Provider:: default
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#
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# Copyright:: 2011-2013, Chef Software, Inc <legal@chef.io>
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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include ::ChefHandler::Helpers
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def whyrun_supported?
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true
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end
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# This action needs to find an rb file that presumably contains the indicated class in it and the
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# load that file. It needs to do this keeping in mind that the same handler class can get enabled
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# and disabled multiple times and there may be multiple instances of them running around. The
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# handler code may also have changed between actions. To handle all this, we parse the full class
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# name and attempt to find its class object, in case it has already been loaded. If such a class
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# is found, we then attempt to unload that class before we load the file requested. We use "load"
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# instead of "require" because we want to reload the handler class in case it has changed and
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# don't want the caching behavior of "require".
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#
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# Note that during this process, we also need to keep track of the current handler configuration.
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# Any of the above steps might fail - in which case we would not want to be in a situation where
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# we have a registered handler that has been unloaded or mangled.
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action :enable do
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class_name = new_resource.class_name
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new_resource.supports.each do |type, enable|
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if enable
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converge_by("disable #{class_name} as a #{type} handler") do
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unregister_handler(type, class_name)
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end
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end
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end
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handler = nil
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converge_by("load #{class_name} from #{new_resource.source}") do
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klass = reload_class(class_name, new_resource.source)
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handler = klass.send(:new, *collect_args(new_resource.arguments))
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end
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new_resource.supports.each do |type, enable|
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if enable
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converge_by("enable #{new_resource} as a #{type} handler") do
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register_handler(type, handler)
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end
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end
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end
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end
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action :disable do
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new_resource.supports.each_key do |type|
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converge_by("disable #{new_resource} as a #{type} handler") do
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unregister_handler(type, new_resource.class_name)
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end
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end
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end
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def load_current_resource
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@current_resource = Chef::Resource::ChefHandler.new(new_resource.name)
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@current_resource.class_name(new_resource.class_name)
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@current_resource.source(new_resource.source)
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@current_resource
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end
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private
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def collect_args(resource_args = [])
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if resource_args.is_a? Array
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resource_args
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else
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[resource_args]
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end
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end
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