func (target *KafkaTarget) Close() error {
	close(target.quitCh)

	if target.producer != nil {
		target.producer.Close()
		return target.client.Close()
	}

	return nil
}

func (target *KafkaTarget) init() error {
	return target.initOnce.Do(target.initKafka)
}

func (target *KafkaTarget) initKafka() error {
	args := target.args

	config := sarama.NewConfig()

	if h.store != nil {
		// save the entry to the queue store which will be replayed to the target.
		return h.store.Put(entry)
	}
	h.logChMu.RLock()
	defer h.logChMu.RUnlock()
	if h.logCh == nil {
		// We are closing...
		return nil
	}

	select {
	case h.logCh <- entry:
	case <-ctx.Done():
		// return error only for context timedout.