code: @SuppressWarnings("rawtypes")
      @Override
      public void prepare(Map conf, TridentOperationContext context)
      {
          if (logger.isDebugEnabled() == true)
          {
              logger.debug("prepared started. taskIndex=" + context.getPartitionIndex()
                      + ", taxkNum=" + context.numPartitions());
          }
      }
docs: {@inheritDoc}