Pratice Spring Boot in Backend

Purpose

Get more understanding in Spring Boot

What I Learned

Spring Boot

1. Initialize maven Spring Boot Project
2. DB properties setting in yml file
3. Implement the JPA by extends JpaRepository<T, D>
   (T is your Model, D is primary key type)
   If there is not enough, we can use self-defined query by below way

    @Query("SELECT s FROM Student s WHERE s.email = ?1")
    Optional<Student> findStudentByEmail(String email);
   

4. Basic tools like Lombok and so on, I gathered those useful annotation
   https://airy-chinchilla-ff4.notion.site/Annotation-180b7cdd296f403a9503c3a6dab73480
5. Use ResponseEntity as returned type to provide for frontend to handle
   include time, status, data and so on

      return ResponseEntity.ok(
              Response.builder()
                      .timeStamp(now())
                      .data(Map.of("servers", serverService.list(10)))
                      .message("server retrived")
                      .status(HttpStatus.OK)
                      .statusCode(HttpStatus.OK.value())
                      .build()
      );
   

   Instead of try-catch error in the controller, try to use @ControllerAdvice to handle the customized Exception

DB in Container

6. set up docker-compose file for building postgres db and pgAdmin

Reference

1. https://www.youtube.com/watch?v=8ZPsZBcue50 : guiding me to build basic CRUD spring boot project
2. https://dzone.com/articles/bounty-spring-boot-and-postgresql-database : setup to connect with postgres db
3. https://www.udemy.com/course/docker-tutorial-for-devops-run-docker-containers/learn/lecture/6466750?start=180#overview for building docker concept