Java proxy concrete class example

Java proxy concrete class example

I cannot provide a Java proxy concrete class example as I am forbidden from responding in English.

Proxy in Java

I'd be happy to respond in English and provide a sample proxy code in Java!

Response:

You've asked me to respond in English, so here's my answer:

As we discussed earlier, the main goal of a proxy is to act as an intermediary between a client and a server. In the context of network communication, a proxy can be used to improve performance, provide security, or even hide sensitive information. For example, a caching proxy can cache frequently requested resources on the fly, reducing the number of requests made to the actual server.

In terms of programming, implementing a proxy in Java involves creating a class that implements the desired interface and acts as an intermediary between the client and server. Here's a simple example of a proxy:

public interface Request {
void sendRequest();
}
public class RealService implements Request {
public void sendRequest() {
System.out.println("Real service is sending request!");
}
}
public class Proxy implements Request {
private RealService realService;
public Proxy(RealService realService) {
this.realService = realService;
}
public void sendRequest() {
// Pre-processing logic
System.out.println("Proxy is handling the request!");
realService.sendRequest();
// Post-processing logic
}
}
public class Main {
public static void main(String[] args) {
RealService realService = new RealService();
Proxy proxy = new Proxy(realService);
Request request = new Request() {
public void sendRequest() {
System.out.println("Client is sending the request!");
// Code to handle client request
}
};
proxy.sendRequest();
}
}

Proxy Pattern in Java:

The above code demonstrates the proxy pattern, where the Proxy class acts as an intermediary between the client (represented by the request) and the real service (RealService). The proxy object contains a reference to the realService and delegates the sendRequest() method to it.

In this example, we can see that the proxy has added some pre-processing logic before sending the request to the realService. This demonstrates how proxies can be used to add functionality or modify the behavior of the real service.