Module io.github.astrapisixtynine.design.patterns.observer

Package io.github.astrapi69.design.pattern.observer

package io.github.astrapi69.design.pattern.observer

Provides core classes and interfaces for implementing the observer design pattern

The observer design pattern is a behavioral design pattern where an object, known as the subject, maintains a list of its dependents, called observers, and notifies them automatically of any state changes, usually by calling one of their methods This package contains the foundational components necessary for building systems based on the observer pattern, enabling objects to be notified of changes in other objects' states.

The key interfaces and classes in this package include:

• AbstractObserver - A base class that provides a concrete implementation of the observer interface, handling updates and executing commands
• AbstractSubject - A base class that provides a concrete implementation of the subject interface, managing observers and updating them when changes occur

This package is essential for creating systems where objects need to be informed of state changes in other objects, promoting loose coupling and dynamic behavior It demonstrates the flexibility and power of the observer design pattern in a wide range of application scenarios.

Related Packages

Package	Description
io.github.astrapi69.design.pattern.observer.api	Provides interfaces that define the core components of the observer design pattern
io.github.astrapi69.design.pattern.observer.chat	Provides classes and interfaces for implementing a chat application using the observer design pattern
io.github.astrapi69.design.pattern.observer.event	Provides classes and interfaces for implementing event handling in the observer design pattern
io.github.astrapi69.design.pattern.observer.exception	Provides classes and interfaces for handling exceptions using the observer design pattern

Classes

Class	Description
AbstractObserver<T>	A generic implementation of the Observer pattern This abstract class implements the Observer and ActionCommand interfaces, providing a basic framework for observers in the Observer design pattern
AbstractSubject<T,O extends Observer<T>>	The class AbstractSubject is an implementation of the Subject interface This class encapsulates the observable object and notifies all registered observers when the observable changes