Опишите, каким образом реализована система отправки уведомлений в вашем проекте

In my Java project, the notification sending system is implemented using the "Observer" pattern. There is a central notification service that manages a list of subscribers (listeners) and sends them messages when certain events occur.

An example of a simplified implementation:

interface NotificationListener {
    void onNotify(String message);
}

class NotificationService {
    private List<NotificationListener> listeners = new ArrayList<>();

    public void subscribe(NotificationListener listener) {
        listeners.add(listener);
    }

    public void unsubscribe(NotificationListener listener) {
        listeners.remove(listener);
    }

    public void notifyAll(String message) {
        for (NotificationListener listener : listeners) {
            listener.onNotify(message);
        }
    }
}

// Usage:
NotificationService service = new NotificationService();
service.subscribe(msg -> System.out.println("Received notification: " + msg));
service.notifyAll("A new task has been created");

This approach allows for easy extension of the system by adding new types of notifications and recipients without modifying existing code.