Library4: API Rest Library Book Author @ManyToMany @OneToMany CRUD with Swagger and Inherence

Welcome to the cifojava2022-3 wiki!

Spring Boot Projects: Library4

Base project

• Base project:
  • POM
  • 1:n relationship: unidrectional or bidirectional
    • @Entity book and List<Book>
    • Author @Entity
  • 1:1 relationship
    • library and address @Entity
  • n:m @Entity book and library
  • Annotations:
    • @OneToMany
    • @ManyToMany
    • @JoinColumn
    • @OneToOne
    • @ManyToMany
    • @JoinTable
  • Swagger: URL swagger : http://localhost:8080/swagger-ui.html
  • JUnit Jupiter to test
  • DataBase H2: Library4
    • First-time CREATE DDL : First-time CREATE DDL option (after that UPDATE) in application.properties
    • Application.properties
    • Command Line Runner with methods to test and JavaFaker
    • @Service, @CrudRepository JPA 2.0, @Component

New tools

• n:m with 1:n and n:1, with @Entity borrow

• getUUID, spring doc

• Audit, as a Abstract class, example

• Inherence, Inheritance for a JPA Entity and Interface

    @MappedSuperclass
    //not @Entity
    public class Book{
  
      @Id
      //private long bookId;
      private UUid bookId;
      private String title;
      // constructor, getters, setters
    }
  
  
    @Entity
    public class BookItem extends Book{
  
      private long bookItemId;
      private boolean isLost;
     // constructor, getters, setters 
    }
  

• JPQL : Java Persistence/JPQL

• DTO, Data Transfer Object :

  • Data Transfer Object DTO is an object that carries data between processes.
  • Martin Fowlwer's article

• Create QR

• UML back-end, done by draw.io

  • Tentative draft-UML to study and to start working:

    

Versions

• version 1.0 : basic project from library2 and library3

  • Tree project