Fantastic video! I love how you explained the MVC pattern so clearly. Do you have any recommendations for resources to learn more about software architecture?
The observer pattern is a behavioral design pattern that's used when you have a one-to-many relationship between objects, and you want to notify multiple objects about changes to the state of one object (the subject or publisher). It's particularly useful in scenarios where different parts of your application need to stay synchronized without being tightly coupled. Let's say you're building a weather application. You have a WeatherStation object that collects weather data, and you have multiple display elements like CurrentConditionsDisplay, StatisticsDisplay, and ForecastDisplay that need to update whenever the weather data changes. In this case, you can use the observer pattern. Here's how it works: The WeatherStation is the subject (or publisher) that maintains a list of observers (the display elements). Each display element (observer) registers itself with the WeatherStation to receive updates. When the weather data changes, the WeatherStation notifies all registered observers. Each observer updates its display with the new weather data. This way, the WeatherStation and the display elements are loosely coupled. The WeatherStation doesn't need to know the specific details of each display element, and new display elements can be added or removed without affecting the WeatherStation's code.
I appreciate the real-world examples you provided for service-oriented architecture. It made the concept much easier to grasp.
Thanks a lot..!
Thank you for simplifying the concept of microservices. It's a game-changer for modern software development!"
Absolutely!
Fantastic video! I love how you explained the MVC pattern so clearly. Do you have any recommendations for resources to learn more about software architecture?
Thanks a lot..!
I'm new to software architecture. Could you explain when it's appropriate to use the observer pattern and provide an example use case?
The observer pattern is a behavioral design pattern that's used when you have a one-to-many relationship between objects, and you want to notify multiple objects about changes to the state of one object (the subject or publisher). It's particularly useful in scenarios where different parts of your application need to stay synchronized without being tightly coupled.
Let's say you're building a weather application. You have a WeatherStation object that collects weather data, and you have multiple display elements like CurrentConditionsDisplay, StatisticsDisplay, and ForecastDisplay that need to update whenever the weather data changes.
In this case, you can use the observer pattern. Here's how it works:
The WeatherStation is the subject (or publisher) that maintains a list of observers (the display elements).
Each display element (observer) registers itself with the WeatherStation to receive updates.
When the weather data changes, the WeatherStation notifies all registered observers.
Each observer updates its display with the new weather data.
This way, the WeatherStation and the display elements are loosely coupled. The WeatherStation doesn't need to know the specific details of each display element, and new display elements can be added or removed without affecting the WeatherStation's code.
Thanks for replying