lib/redis_cluster/slot.rb in redis_cluster-0.2.8 vs lib/redis_cluster/slot.rb in redis_cluster-0.2.9

@@ -1,16 +1,21 @@
 module RedisCluster
 
   class Slot
     KEY_PATTERN = /\{([^\}]*)\}/
 
-    # has tag key "{xxx}ooo" will calculate "xxx" for slot
+    # hash tag key "{xxx}ooo" will calculate "xxx" for slot
     # if key is "{}dddd", calculate "{}dddd" for slot
     def self.slot_by(key)
       key = key.to_s
       KEY_PATTERN =~ key
       key = $1 if $1 && !$1.empty?
       CRC16.crc16(key) % Configuration::HASH_SLOTS
+    end
+
+    # check if keys at same slot
+    def self.at_one?(keys)
+      keys.map { |k| slot_by(k) }.uniq.size == 1
     end
 
   end # end Slot
 
 end