onasty/mailer/config.go (view raw)
Oleksandr Smirnov
Oleksandr Smirnov
olexsmir@gmail.com refactor(config): make config singleton (#202), 9 months ago
olexsmir@gmail.com refactor(config): make config singleton (#202), 9 months ago
| 1 | package main |
| 2 | |
| 3 | import ( |
| 4 | "os" |
| 5 | "strconv" |
| 6 | "sync" |
| 7 | ) |
| 8 | |
| 9 | var ( |
| 10 | configInstance *Config |
| 11 | once sync.Once |
| 12 | ) |
| 13 | |
| 14 | type Config struct { |
| 15 | AppURL string |
| 16 | FrontendURL string |
| 17 | |
| 18 | NatsURL string |
| 19 | MailgunFrom string |
| 20 | MailgunDomain string |
| 21 | MailgunAPIKey string |
| 22 | |
| 23 | LogLevel string |
| 24 | LogFormat string |
| 25 | LogShowLine bool |
| 26 | |
| 27 | MetricsEnabled bool |
| 28 | MetricsPort int |
| 29 | } |
| 30 | |
| 31 | func NewConfig() *Config { |
| 32 | once.Do(func() { |
| 33 | configInstance = &Config{ |
| 34 | AppURL: getenvOrDefault("APP_URL", ""), |
| 35 | FrontendURL: getenvOrDefault("FRONTEND_URL", ""), |
| 36 | NatsURL: getenvOrDefault("NATS_URL", ""), |
| 37 | MailgunFrom: getenvOrDefault("MAILGUN_FROM", ""), |
| 38 | MailgunDomain: getenvOrDefault("MAILGUN_DOMAIN", ""), |
| 39 | MailgunAPIKey: getenvOrDefault("MAILGUN_API_KEY", ""), |
| 40 | LogLevel: getenvOrDefault("LOG_LEVEL", "debug"), |
| 41 | LogFormat: getenvOrDefault("LOG_FORMAT", "json"), |
| 42 | LogShowLine: getenvOrDefault("LOG_SHOW_LINE", "true") == "true", |
| 43 | MetricsPort: mustGetenvOrDefaultInt("METRICS_PORT", 8001), |
| 44 | MetricsEnabled: getenvOrDefault("METRICS_ENABLED", "true") == "true", |
| 45 | } |
| 46 | }) |
| 47 | return configInstance |
| 48 | } |
| 49 | |
| 50 | func getenvOrDefault(key, def string) string { |
| 51 | if v, ok := os.LookupEnv(key); ok { |
| 52 | return v |
| 53 | } |
| 54 | return def |
| 55 | } |
| 56 | |
| 57 | func mustGetenvOrDefaultInt(key string, def int) int { |
| 58 | if v, ok := os.LookupEnv(key); ok { |
| 59 | r, err := strconv.Atoi(v) |
| 60 | if err != nil { |
| 61 | panic(err) |
| 62 | } |
| 63 | return r |
| 64 | } |
| 65 | return def |
| 66 | } |