if key.IsLast || target.batch.IsFull() {
		return target.commitBatch()
	}
	return nil
}

func (target *KafkaTarget) commitBatch() error {
	keys, msgs, err := target.batch.GetAll()
	if err != nil {
		return err
	}
	if err = target.producer.SendMessages(msgs); err != nil {
		if isKafkaConnErr(err) {
			return store.ErrNotConnected
		}
		return err
	}