func()

in galog_eventlog_windows.go [51:92]

• 34 lines of code
• 8 McCabe index (conditional complexity)

func (eb *EventlogBackend) writeEntry(entry *LogEntry) error {
	format := eb.config.Format(entry.Level)
	logMessage, err := entry.Format(format)
	if err != nil {
		return fmt.Errorf("failed to format event log message: %+v", err)
	}

	// Only attempt to install the event logger if we've not managed to register
	// before.
	if !eb.registered {
		err := eventlog.InstallAsEventCreate(eb.ident, eventlog.Info|eventlog.Warning|eventlog.Error)
		if err != nil && !strings.Contains(err.Error(), "registry key already exists") {
			return fmt.Errorf("failed to install eventlog: %+v", err)
		}
		eb.registered = true
	}

	writer, err := eventlog.Open(eb.ident)
	if err != nil {
		return fmt.Errorf("failed to open eventlog: %+v", err)
	}
	defer writer.Close()

	ops := map[Level]func(uint32, string) error{
		DebugLevel:   writer.Info,
		InfoLevel:    writer.Info,
		WarningLevel: writer.Warning,
		ErrorLevel:   writer.Error,
		FatalLevel:   writer.Error,
	}

	fn, found := ops[entry.Level]
	if !found {
		return fmt.Errorf("unsupported event log level: %+v", entry.Level)
	}

	if err := fn(eb.eventID, logMessage); err != nil {
		return fmt.Errorf("writing to eventlog: %+v", err)
	}

	return nil
}