Proxies in Java - Dynamic Proxy Springboot | Together Java | Page 1

frail geyser Sep 20, 2025, 10:37 AM

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Hey there - would anyone know about proxies in Java?
I'm trying to understand the dynamic proxies in springboot ....

I understand so far that a lot of annotations are proxies under the hood
however suddenly I don't understand all this code in App.js which is basically bringing all components together

Please help. Thank you

quartz kayakBOT Sep 20, 2025, 10:37 AM

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<@&1004656351647117403> please have a look, thanks.

frail geyser Sep 20, 2025, 10:39 AM

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Pretty much. I don't understand things from ClassLoader and below ... like so many diff functions and things just came in which make very limited sense even though I've asked chatgpt to explain it multiple times

analog loom Sep 20, 2025, 10:40 AM

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Proxies in Java in Spring have many features like

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Aspect-Oriented Programming (AOP)

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Transaction Management

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Lazy Initialization

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Caching

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Asynchronous Execution

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we also have different type of dynamic proxies in spring

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JDK Dynamic Proxies

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CGLIB Proxies

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Any spcific part in it which is not clear to you

frail geyser Sep 20, 2025, 10:42 AM

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person.java
public interface Person{
  public void introduce (String name);
  public void sayAge (int age);
  public void sayWhereFrom (String city, String country)
}

And then there's a Man.java which is just an implementation of this interface

invocationHandler.java
public class invokeHandler ImvocationHandler{
  private Person person;
  public invokeHandler(Person person){
    this.person = person;
  }

  @Override
  public Object inboke (Object proxy, Method method, Object[] args{
  sysout("Hi");
  return null;
  }
}

quartz kayakBOT Sep 20, 2025, 10:42 AM

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frail geyser ``` person.java public interface Person{ public void introduce (String name); ...

Detected code, here are some useful tools:

Formatted code

person.javapublic interface Person {
  public void introduce(String name);
  public void sayAge(int age);
  public void sayWhereFrom(String city, String country) }

frail geyser Sep 20, 2025, 10:43 AM

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analog loom Any spcific part in it which is not clear to you

Rightttt so I was told that what I'm learning is going to be essential for AOP

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Not sure what that is ... but rn I was just learning raw implementation of dynamic proxy in spring ...

analog loom Sep 20, 2025, 10:44 AM

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yes

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as whatever concept you use like AOP which is widely used in any spring project

frail geyser Sep 20, 2025, 10:44 AM

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However, couldn't understand like where things are coming from

frail geyser Sep 20, 2025, 10:45 AM

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analog loom as whatever concept you use like AOP which is widely used in any spring project

I'm not sure what AOP is though. Right now it was just making a basic proxy to understand like ... it's basically something that wraps itself around original class and runs before running it

analog loom Sep 20, 2025, 10:45 AM

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First I suggets you go through AOP concept and its usage in spring

frail geyser Sep 20, 2025, 10:45 AM

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It's like ... Nginx which I understood - which is like a load balancer + firewall

frail geyser Sep 20, 2025, 10:45 AM

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analog loom First I suggets you go through AOP concept and its usage in spring

Oh okay. It's the next chapter

analog loom Sep 20, 2025, 10:45 AM

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NGINX is a server

frail geyser Sep 20, 2025, 10:45 AM

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Should I come back after doing AOP and then ask if I'm still confused?

frail geyser Sep 20, 2025, 10:45 AM

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analog loom NGINX is a server

Okay nvm

analog loom Sep 20, 2025, 10:45 AM

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sure anytime

frail geyser Sep 20, 2025, 10:46 AM

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analog loom sure anytime

Okay thank you. If you're online for a bit
I'll try to finish AOP and then come back and ask if I'm still confused

analog loom Sep 20, 2025, 10:46 AM

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You are in which timezone?

frail geyser Sep 20, 2025, 10:47 AM

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I'm in AEST - Australian timezone

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But I'm awake the whole night today

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Have uni assignments + want to gain confidence in understand systems like this

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So will be studying Springboot for a while

analog loom Sep 20, 2025, 10:48 AM

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cool no issue

frail geyser Sep 20, 2025, 11:25 AM

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analog loom cool no issue

Btw which timezone are you in?

analog loom Sep 20, 2025, 11:27 AM

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IST

frail geyser Sep 20, 2025, 11:28 AM

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Oh so its 5PM there

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I'm actually originally indian too and understand hindi
So I was watching this video from lovepreet singh -

https://www.youtube.com/watch?v=fmX84zu-5gs

YouTube

Lovepreet Singh

Complete Java Full Stack: AWS, Spring Boot, Microservices

This course contains three parts that can be found in playlist:- https://www.youtube.com/playlist?list=PL7CBVLpg0zqf_ggig9cOr72oZNGf9RZmZ

=====================
This course is designed for the people:-
📌 who are not able to make projects on their own
📌 who want to prepare for fulls...

▶ Play video

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And he explains proxies in 5:12:00 to 6:00:00
Is it okay if I watch these with you sometime when you're free in maybe today or next week?

analog loom Sep 20, 2025, 11:31 AM

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not today may be next week

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good to know that

frail geyser Sep 20, 2025, 11:31 AM

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Are these concepts mostly intermediate or advanced type?

frail geyser Sep 20, 2025, 11:32 AM

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analog loom not today may be next week

Are you free anytime this saturday/sunday?

analog loom Sep 20, 2025, 11:44 AM

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nopes not

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when you work with Spring these are usedby advance concepts

frail geyser Sep 20, 2025, 11:45 AM

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analog loom when you work with Spring these are usedby advance concepts

As in?

analog loom Sep 20, 2025, 11:49 AM

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When you work on Spring project you understanding AOP usage and its importance

frail geyser Sep 20, 2025, 11:50 AM

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analog loom When you work on Spring project you understanding AOP usage and its importance

Oh okay and these AOP usage concepts

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Are used by more advanced topics?

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Is that what you meant?

analog loom Sep 20, 2025, 11:50 AM

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Yes when I work on enterprise applications I use

#Proxies in Java - Dynamic Proxy Springboot