lattice

http://blog.ezyang.com/2011/04/hoopl-dataflow-lattices/

    /**
    * Makes sure that the ByteArrayDeserializer is registered in the Kafka properties.
    *
    * @param props The Kafka properties to register the serializer in.
    */
   private static void setDeserializer(Properties props) {
      final String deSerName = ByteArrayDeserializer.class.getName();

      Object keyDeSer = props.get(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG);
      Object valDeSer = props.get(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG);

      if (keyDeSer != null && !keyDeSer.equals(deSerName)) {
         LOG.warn("Ignoring configured key DeSerializer ({})", ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG);
      }
      if (valDeSer != null && !valDeSer.equals(deSerName)) {
         LOG.warn("Ignoring configured value DeSerializer ({})", ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG);
      }

      props.put(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG, deSerName);
      props.put(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG, deSerName);
   }
}