added a notify system

hws/config.go

@@ -13,6 +13,7 @@ type Config struct {
 	ReadHeaderTimeout time.Duration // ENV HWS_READ_HEADER_TIMEOUT: Timeout for reading request headers in seconds (default: 2)
 	WriteTimeout      time.Duration // ENV HWS_WRITE_TIMEOUT: Timeout for writing requests in seconds (default: 10)
 	IdleTimeout       time.Duration // ENV HWS_IDLE_TIMEOUT: Timeout for idle connections in seconds (default: 120)
+	ShutdownDelay     time.Duration // ENV HWS_SHUTDOWN_DELAY: Delay in seconds before server shutsdown when Shutdown is called (default: 5)
 }
 
 // ConfigFromEnv returns a Config struct loaded from the environment variables
@@ -24,6 +25,7 @@ func ConfigFromEnv() (*Config, error) {
 		ReadHeaderTimeout: time.Duration(env.Int("HWS_READ_HEADER_TIMEOUT", 2)) * time.Second,
 		WriteTimeout:      time.Duration(env.Int("HWS_WRITE_TIMEOUT", 10)) * time.Second,
 		IdleTimeout:       time.Duration(env.Int("HWS_IDLE_TIMEOUT", 120)) * time.Second,
+		ShutdownDelay:     time.Duration(env.Int("HWS_SHUTDOWN_DELAY", 5)) * time.Second,
 	}
 
 	return cfg, nil