Using Project Lomobok in Spring and JPA

   What is Project Lomobok

Project Lombok is a java library that automatically plugs into your editor and build tools, spicing up your java.Never write another getter or equals method again, with one annotation your class has a fully featured builder, Automate your logging variables, and much more.

How to Configure

• Go to https://projectlombok.org/mavenrepo/
• Copy latest dependency for this project and paste into your project’s pom.xml
• Let intelij (Or your preferd IDE) download the dependency
• Enable lombok plugin in intelij

How To Use

•    Open a bean
•     Refactor à Lombok as @Data and notice the code getting refactored.
• What does @Data do while using Lombo

o   It adds

§  Getters and setters

§  HashCode

§  Equals

Some Tips For Using LOMBOK and JPA

•   /**

 * Having bydirectional relationshps in a n entity and using lambok with it creates

        problem for hashcoding so we will have to exclude the bidirectional

 memebers of this class

 * while using lombokl

 */

@EqualsAndHashCode(exclude = "recipes")

•  Caused by: org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role: com.spring5.springrecepie.domain.Category.recipes, could not initialize proxy - no Session

• The above error was caused when there was no “fetch = FetchType.EAGER” defined 

• Hence defining mapping as below resolved this problem

·       @ManyToMany(mappedBy = "categories",fetch = FetchType.EAGER)
private Set<Recipe> recipes;

Lombok Features And Annotations

•   /*Lombok Annotations*/
  @Setter
  @Getter
  @EqualsAndHashCode(exclude = {"petType","owner","visitSet"})
  @NoArgsConstructor
  @AllArgsConstructor
  @Builder
  /*Lombok Annotations*/
• Visit below page to see all the available features

•  https://projectlombok.org/features/all

Video Tutorial

•  Also you can watch the video given on below URL

• https://projectlombok.org/