added label indexing features when using label groupings

lib/redistat.rb

@@ -36,6 +36,7 @@ module Redistat
   KEY_EVENT = ".event:"
   KEY_LEBELS = "Redistat.lables:"
   KEY_EVENT_IDS = ".event_ids"
+  LABEL_INDEX = ".label_index:"
   GROUP_SEPARATOR = "/"
   
   class InvalidOptions < ArgumentError; end

lib/redistat/key.rb

@@ -57,6 +57,10 @@ module Redistat
       @label.parent_group
     end
     
+    def update_label_index
+      @label.update_index
+    end
+    
     def to_s(depth = nil)
       depth ||= @options[:depth]
       key = self.prefix

lib/redistat/label.rb

@@ -49,8 +49,24 @@ module Redistat
       @groups.reverse!
     end
     
+    def parent
+      @parent ||= self.class.new(parent_group)
+    end
+    
     def parent_group
-      groups[-2]
+      groups[1]
+    end
+    
+    def sub_group
+      @raw.split(GROUP_SEPARATOR).last
+    end
+    
+    def update_index
+      groups.each do |group|
+        label = self.class.new(group)
+        break if label.parent_group.nil?
+        db.sadd("#{LABEL_INDEX}#{label.parent_group}", label.sub_group) == "OK" ? true : false
+      end
     end
     
   end

lib/redistat/summary.rb

@@ -13,6 +13,7 @@ module Redistat
         stats = inject_group_summaries(stats)
         key.groups.each { |k|
           update_key(k, stats, depth_limit, connection_ref)
+          k.update_label_index # TODO: add a label_indexing option
         }
       else
         update_key(key, stats, depth_limit, connection_ref)