lib/nurse/service_factory.rb in nurse-rb-2.0.0 vs lib/nurse/service_factory.rb in nurse-rb-2.1.0

@@ -1,17 +1,49 @@
 module Nurse
   class ServiceFactory
     def attach_to(dependency_manager)
+      if shared?
+        dependency_manager.share(dependency_key) do |di|
+          create_service(di)
+        end
+
+        return
+      end
+
       dependency_manager.set(dependency_key) do |di|
         create_service(di)
       end
     end
 
     def create_service(_dependency_manager)
-      fail 'create_service must be implemented'
+      raise 'create_service must be implemented'
     end
 
     def dependency_key
-      fail 'dependency_key must be implemented'
+      raise 'dependency_key must be implemented'
+    end
+
+    def shared?
+      false
+    end
+
+    class << self
+      private
+
+      def share(boolean)
+        instance_eval do
+          define_method :shared? do
+            boolean
+          end
+        end
+      end
+
+      def key(dependency_key)
+        instance_eval do
+          define_method :dependency_key do
+            dependency_key
+          end
+        end
+      end
     end
   end
 end