service/consumer/config.go

package consumer

import (
	"errors"
)

type Config struct {
	Hosts   []string `yaml:"hosts"`
	Group   string   `yaml:"group"`
	Timeout int      `yaml:"timeout"`
}

func (c Config) Invalidate() error {
	if len(c.Hosts) < 1 {
		return errors.New("at least one bootstrap server / host must be provided")
	}

	if c.Group == "" {
		return errors.New("group name must not be an empty string")
	}

	if c.Timeout < 1 {
		c.Timeout = 100
	}

	return nil
}