Use Cases of Proxy Method Design Pattern in Java

• Lazy Loading: You can use a proxy to implement lazy loading, where the real object is created and initialized only when it is accessed for the first time. This is beneficial when creating the real object is resource-intensive or time-consuming.
• Logging: Proxy can be employed for logging method calls, providing a way to log information such as the method name, parameters, and results. This can be helpful for debugging or auditing purposes.
• Caching: You can use a proxy to implement caching mechanisms. The proxy can check whether the result of a method call is already cached and return the cached result instead of invoking the real object.
• Virtual Proxy: A virtual proxy can be used to represent expensive objects, such as large images or complex calculations, without loading them into memory until they are actually needed.
• Protection Proxy: This type of proxy controls access to sensitive operations. For instance, you might use a protection proxy to check if the client has the necessary permissions before allowing a specific operation.
• Remote Proxy: A remote proxy can be employed when dealing with distributed systems. It acts as a local representative for an object that resides in a different address space, providing a way to interact with it remotely.
• Monitoring and Metrics: Gather metrics or monitoring data by intercepting method calls. This can be used to collect information about the usage patterns of specific functionalities.

A Proxy Method or Proxy Design Pattern is a structural design pattern that provides a surrogate or placeholder for another object to control access to it. This pattern involves creating a new class, known as the proxy, which acts as an intermediary between a client and the real object. The proxy object controls access to the real object, allowing you to add additional functionality, such as lazy loading, access control, logging, or caching, without changing the actual object’s code.