How To Add created, createdBy, lastModified And lastModifiedBy In Entities Via Hibernate

Note: The same thing can be obtained via Spring Data JPA auditing as here.

Description: This application is an example of adding in an entity the fields, created, createdBy, lastModified and lastModifiedBy via Hibernate support. These fields will be automatically generated/populated.

Key points:

• write an abstract class (e.g., BaseEntity) annotated with @MappedSuperclass
• in this abstract class, define a field named created and annotate it with the built-in @CreationTimestamp annotation
• in this abstract class, define a field named lastModified and annotate it with the built-in @UpdateTimestamp annotation
• in this abstract class, define a field named createdBy and annotate it with the @CreatedBy annotation
• in this abstract class, define a field named lastModifiedBy and annotate it with the @ModifiedBy annotation
• implement the @CreatedBy annotation via AnnotationValueGeneration
• implement the @ModifiedBy annotation via AnnotationValueGeneration
• every entity that want to take advantage of created, createdBy, lastModified and lastModifiedBy will extend the BaseEntity
• store the date-time in UTC

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