1package logrus 2 3// A hook to be fired when logging on the logging levels returned from 4// `Levels()` on your implementation of the interface. Note that this is not 5// fired in a goroutine or a channel with workers, you should handle such 6// functionality yourself if your call is non-blocking and you don't wish for 7// the logging calls for levels returned from `Levels()` to block. 8type Hook interface { 9 Levels() []Level 10 Fire(*Entry) error 11} 12 13// Internal type for storing the hooks on a logger instance. 14type LevelHooks map[Level][]Hook 15 16// Add a hook to an instance of logger. This is called with 17// `log.Hooks.Add(new(MyHook))` where `MyHook` implements the `Hook` interface. 18func (hooks LevelHooks) Add(hook Hook) { 19 for _, level := range hook.Levels() { 20 hooks[level] = append(hooks[level], hook) 21 } 22} 23 24// Fire all the hooks for the passed level. Used by `entry.log` to fire 25// appropriate hooks for a log entry. 26func (hooks LevelHooks) Fire(level Level, entry *Entry) error { 27 for _, hook := range hooks[level] { 28 if err := hook.Fire(entry); err != nil { 29 return err 30 } 31 } 32 33 return nil 34} 35