[4.0] Create event hook infrastructure

crowbar_framework/lib/crowbar/event_dispatcher.rb

@@ -0,0 +1,51 @@
+#
+# Copyright 2017, SUSE
+#
+# 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.
+#
+
+module Crowbar
+  class EventDispatcher
+    class << self
+      def trigger_hooks(event, details)
+        BarclampCatalog.barclamps.keys.each do |barclamp|
+          begin
+            cls = ServiceObject.get_service(barclamp)
+          rescue NameError
+            # catalog may contain barclamps which don't have services
+            next
+          end
+
+          next unless cls.method_defined?(:event_hook)
+
+          service = cls.new(Rails.logger)
+
+          proposals = Proposal.where(barclamp: barclamp)
+          proposals.each do |proposal|
+            next if proposal.role.nil?
+            begin
+              service.event_hook(proposal, event, details)
+            rescue StandardError => e
+              Rails.logger.error(
+                "Error while executing event_hook for barclamp '#{barclamp}', " \
+                "proposal '#{proposal.name}', and event '#{event}'. " \
+                "Error message is '#{e.message}'."
+              )
+            end
+          end
+        end
+      end
+      handle_asynchronously :trigger_hooks
+    end
+  end
+end