Real-world! Spring Boot and JPA Utilization 2 - API Development and Performance Optimization

🚩 This course is a roadmap course.

Implementing the API properly

Even if you develop one API, if you use JPA, there are many things to worry about because the concept of entities is included. Should entities be exposed directly to the API? Or should they be returned as separate objects? How should lazy loading be handled if entities are returned? You will have many concerns. We will tell you practical know-how on how to implement them safely and maintainably in practice.

 Understanding JPA Extreme Query Performance Optimization

In practice, complex situations often arise where multiple tables must be joined to quickly retrieve data. However, collection data with one-to-many relationships must also be retrieved, and additional paging may be required. Then, the problem becomes very complex, and it is difficult to solve the problem simply by joining tables. We will share practical know-how on how to optimize such complex query performance problems with JPA, and what the limits are.

 Performance tuning by coding complex examples in 6 steps

We have prepared a system where you can develop an API that does not perform well, analyze why it does not perform well, and tune it by dividing it into 6 steps and coding step by step . If you follow this content, you will naturally learn how to deal with complex performance issues in practice.

 Solves 90% of practical JPA performance issues

This lecture covers various performance problems that occur frequently in practice so that you can solve 90% of practical JPA performance problems. When I look at practical projects using Spring Boot and JPA, I see many developers who are good at implementing functions but struggle because the performance is not good at the end of the project. So when I go to help them, there are many people who don't know how to optimize JPA performance.

I've seen a wide variety of situations, from people who stay up all night trying to solve it somehow, to people who don't know how to do it and manually write SQL instead of JPA, changing a lot of code to SQL. However, when I actually went to help, it didn't even take 5 minutes to tune it for good performance. I can still vividly see the look on the developer's face when he saw a query that used to take an hour after struggling for several days reduced to tens of seconds by adjusting the JPA query options and modifying only a few codes. JPA already provides various performance tuning options in itself . Therefore, you can try various performance optimizations with just a few options and code modifications.

If you understand what is explained in this lecture, you will be able to solve 90% of practical performance problems.

💻 Check out the player lecture!

Java ORM Standard JPA Programming - Basics
This is a prerequisite course for understanding JPA-based technologies.

Real-world! Spring Boot and JPA Utilization 1 - Web Application Development
Design and develop real-world web applications with Spring Boot and JPA.

Practice! Spring Data JPA
Learn Spring JPA from basics to practice.

Practice! Querydsl
Solve complex and dynamic query problems with Querydsl.

The book is for those who want to study more in depth.
You can think of it as a reference book.
(If you do not have a book, separate materials for the lecture will be provided.)