Snippet

Handling Lifecycle Hooks with JPA Entity Listeners

Entity Listeners allow you to execute logic at specific points in a JPA entity's lifecycle, such as before persistence or after loading, without modifying the entity class itself.

snippet.java

java

@Entity
@EntityListeners(AuditListener.class)
public class Product {
    @Id private Long id;
    private String name;
}
 
public class AuditListener {
    @PrePersist
    public void setCreatedDate(Object entity) {
        System.out.println("About to persist entity: " + entity);
    }
 
    @PostLoad
    public void logLoad(Object entity) {
        System.out.println("Entity loaded from DB: " + entity);
    }
}

spring

Breakdown

@EntityListeners

Specifies the class containing lifecycle callback methods for the entity.

@PrePersist

Marks a method to run before the entity is first saved to the database.

@PostLoad

Marks a method to run immediately after an entity is retrieved from the database.

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Handling Lifecycle Hooks with JPA Entity Listeners

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