Software Design Patterns

Observer Design Pattern

Subject (Observable) [Flight, News, Traffic, Stocks, Weather]

Concrete Subject ideas:

• CryptoMarket – Notifies observers about cryptocurrency price changes.
• ElectionUpdates – Provides real-time election result updates.
• AirQualityMonitor – Reports air pollution levels.
• EmergencyAlerts – Sends notifications about disasters or critical situations.
• GameScoreBoard – Updates scores for ongoing sports matches.
• MovieReleases – Notifies about new movie or TV show releases.
• WeatherForecast – Sends daily or weekly weather predictions.
• ElectricityUsage – Tracks and updates electricity consumption data.
• OnlineStoreDeals – Alerts about discounts and flash sales.
• JobAlerts – Notifies about new job postings matching user interests.
• TrainSchedule – Updates about train arrival and departure times.
• FuelPriceMonitor – Notifies about changes in fuel prices.
• FestivalEvents – Updates on upcoming festivals and local events.
• CovidTracker – Provides updates on COVID-19 cases and restrictions.
• BookReleases – Alerts readers about new book publications.
• SpaceMissions – Notifies about upcoming or ongoing space missions.
• CurrencyExchange – Updates on foreign exchange rates.
• RestaurantSpecials – Alerts about daily or weekly food specials in restaurants.
• OnlineGameUpdates – Notifies about patches, events, and game maintenance schedules.
• MusicConcerts – Provides information about upcoming concerts and ticket sales.

Observer [Phone, TV, Computer]

By MOUSTAFA ALSAYEH