lib/moneta/adapters/leveldb.rb in moneta-0.7.9 vs lib/moneta/adapters/leveldb.rb in moneta-0.7.10

@@ -6,28 +6,32 @@
     # @api public
     class LevelDB < Memory
       # @param [Hash] options
       # @option options [String] :dir - Database path
       # @option options All other options passed to `LevelDB::DB#new`
+      # @option options [::LevelDB::DB] :backend Use existing backend instance
       def initialize(options = {})
-        raise ArgumentError, 'Option :dir is required' unless options[:dir]
-        @hash = ::LevelDB::DB.new(options[:dir])
+        @backend = options[:backend] ||
+          begin
+            raise ArgumentError, 'Option :dir is required' unless options[:dir]
+            ::LevelDB::DB.new(options[:dir])
+          end
       end
 
       # (see Proxy#key?)
       def key?(key, options = {})
-        @hash.includes?(key)
+        @backend.includes?(key)
       end
 
       # (see Proxy#clear)
       def clear(options = {})
-        @hash.each {|k,v| delete(k, options) }
+        @backend.each {|k,v| delete(k, options) }
         self
       end
 
       # (see Proxy#close)
       def close
-        @hash.close
+        @backend.close
         nil
       end
     end
   end
 end