func (s *server) getFromConf(cf *cfg.Config, key string) (string, error) {
if v, ok := cf.Get(key); ok {
if v == "" {
return "", fmt.Errorf("required parameter %s is empty", key)
}
return v, nil
}
return "", fmt.Errorf("required parameter %s not found", key)
}
func newStaticgen(c *cfg.Config) (*staticgen, error) {
key, ok := c.Get("config.key")
if !ok {
return nil, errors.New("key not specified")
}
val, ok := c.Get("config.val")
if !ok {
return nil, errors.New("val not specified")
}
s := &staticgen{
ch: make(chan RawEntry),
}
go s.run(key, val)
return s, nil
}
func newMysql(c *cfg.Config) (*mysql, error) {
usr, ok := c.Get("config.user")
if !ok {
return nil, errors.New("mysql user not specified")
}
pwd, ok := c.Get("config.password")
if !ok {
return nil, errors.New("mysql password not specified")
}
dbname, ok := c.Get("config.database")
if !ok {
return nil, errors.New("mysql database name not specified")
}
query, ok := c.Get("config.query")
if !ok {
return nil, errors.New("mysql query not specified")
}
host := c.GetVal("config.host", "localhost")
port := c.GetVal("config.port", "3306")
dsn := fmt.Sprintf("%s:%s@tcp(%s:%s)/%s", usr, pwd, host, port, dbname)
db, err := sql.Open("mysql", dsn)
if err != nil {
return nil, fmt.Errorf("failed to connect to mysql[%s]: %s", dsn, err)
}
rows, err := db.Query(query)
if err != nil {
return nil, fmt.Errorf("failed to execute query on mysql[%s]: %s", dsn, err)
}
m := &mysql{
ch: make(chan RawEntry, 100),
rows: rows,
}
// rows is closed in run()
go func() {
m.run()
db.Close()
}()
return m, nil
}