Understanding the Proxy Design Pattern in Java
The Proxy Design Pattern is a structural design pattern that provides a placeholder or surrogate for another object to control access to it. A proxy can be used to add additional functionality such as lazy initialization, access control, logging, or caching before or after a request reaches the original object. This post explains the Proxy Pattern with simple real-world examples like payment methods and ATM interactions based on the detailed tutorial. What is the Proxy Design Pattern? The Proxy Pattern involves a proxy object that implements the same interface as the original object and holds a reference to it. The proxy controls access, managing when or how the real object is accessed and manipulated. Real-World Example: Payment System When making payments, one might pay using different methods like cash, credit card, or UPI. These payment modes act as proxies to the actual cash system, adding convenience and flexibility while controlling access to real cash transactions. ...