Enable:             enabled,
			Brokers:            brokers,
			Topic:              env.Get(topicEnv, kv.Get(target.KafkaTopic)),
			QueueDir:           env.Get(queueDirEnv, kv.Get(target.KafkaQueueDir)),
			QueueLimit:         queueLimit,
			Version:            env.Get(versionEnv, kv.Get(target.KafkaVersion)),
			BatchSize:          uint32(batchSize),
			BatchCommitTimeout: batchCommitTimeout,
		}

		tlsEnableEnv := target.EnvKafkaTLS

			Value: cfg.TLS.ClientTLSCert,
		},
		config.KV{
			Key:   target.KafkaClientTLSKey,
			Value: cfg.TLS.ClientTLSKey,
		},
		config.KV{
			Key:   target.KafkaQueueLimit,
			Value: strconv.Itoa(int(cfg.QueueLimit)),
		},
		config.KV{
			Key:   target.KafkaTLS,
			Value: config.FormatBool(cfg.TLS.Enable),
		},
		config.KV{
			Key:   target.KafkaTLSSkipVerify,
			Value: config.FormatBool(cfg.TLS.SkipVerify),
		},

	Enable             bool          `json:"enable"`
	Brokers            []xnet.Host   `json:"brokers"`
	Topic              string        `json:"topic"`
	QueueDir           string        `json:"queueDir"`
	QueueLimit         uint64        `json:"queueLimit"`
	Version            string        `json:"version"`
	BatchSize          uint32        `json:"batchSize"`
	BatchCommitTimeout time.Duration `json:"batchCommitTimeout"`
	TLS                struct {

	Password           string    `json:"password"` // default: no password
	Database           string    `json:"database"` // default: same as user
	QueueDir           string    `json:"queueDir"`
	QueueLimit         uint64    `json:"queueLimit"`
	MaxOpenConnections int       `json:"maxOpenConnections"`
}

// Validate PostgreSQLArgs fields
func (p PostgreSQLArgs) Validate() error {
	if !p.Enable {
		return nil
	}

	PublisherConfirms bool     `json:"publisherConfirms"`
	QueueDir          string   `json:"queueDir"`
	QueueLimit        uint64   `json:"queueLimit"`
}

//lint:file-ignore ST1003 We cannot change these exported names.

// AMQP input constants.
const (
	AmqpQueueDir   = "queue_dir"
	AmqpQueueLimit = "queue_limit"

	AmqpURL               = "url"
	AmqpExchange          = "exchange"
	AmqpRoutingKey        = "routing_key"

	User               string   `json:"user"`
	Password           string   `json:"password"`
	Database           string   `json:"database"`
	QueueDir           string   `json:"queueDir"`
	QueueLimit         uint64   `json:"queueLimit"`
	MaxOpenConnections int      `json:"maxOpenConnections"`
}

// Validate MySQLArgs fields
func (m MySQLArgs) Validate() error {
	if !m.Enable {
		return nil
	}

	ClientCert      string    `json:"clientCert"`
	ClientKey       string    `json:"clientKey"`
	PingInterval    int64     `json:"pingInterval"`
	QueueDir        string    `json:"queueDir"`
	QueueLimit      uint64    `json:"queueLimit"`
	JetStream       struct {
		Enable bool `json:"enable"`
	} `json:"jetStream"`
	Streaming struct {
		Enable             bool   `json:"enable"`
		ClusterID          string `json:"clusterID"`

	Format     string          `json:"format"`
	URL        xnet.URL        `json:"url"`
	Index      string          `json:"index"`
	QueueDir   string          `json:"queueDir"`
	QueueLimit uint64          `json:"queueLimit"`
	Transport  *http.Transport `json:"-"`
	Username   string          `json:"username"`
	Password   string          `json:"password"`
}

// Validate ElasticsearchArgs fields