You need to define a custom RevisionEntity to be used by Envers so you can add the attributes you need. It is necessary to annotate the class you pretend to use as custom revision entity:
@RevisionEntity(AuditingRevisionListener.class)
In this entity you can define what you need. For example, this should be a good starting point:
@Entity
@Table(name = "DATA_REVIEW_TABLE")
@RevisionEntity(AuditingRevisionListener.class)
public class AuditedRevisionEntity {
@RevisionNumber
@Id
@SequenceGenerator(name = "revisionSeq", sequenceName = "REVISION_DATOS_ID_SEQ", allocationSize = 1, initialValue = 1)
@GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "revisionSeq")
private int id;
@RevisionTimestamp
private Date modifiedAt;
private String username;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
@Temporal(value = TemporalType.TIMESTAMP)
public Date getModifiedAt() {
return modifiedAt;
}
public void setModifiedAt(Date modifiedAt) {
this.modifiedAt = modifiedAt;
}
}
Also you must define a Revision listener to handle how data is initialized in your custom revision entity. Your listener must implement RevisionListener.
public class AuditingRevisionListener implements RevisionListener {
private static Log log = LogFactory.getLog(AuditingRevisionListener.class.getName());
@Override
public void newRevision(Object revisionEntity) {
AuditedRevisionEntity revEntity = (AuditedRevisionEntity) revisionEntity;
String userName = null;
try {
if (SecurityContextHolder.getContext().getAuthentication() != null) {
Object principal = getCurrentUserInfo();
if (principal == null) {
userName = "system";
} else if (principal instanceof User) {
userName = ((User) principal).getUsername();
}
}
} catch (Exception e) {
log.error("Error auditing username.", e);
}
revEntity.setUsername(userName);
revEntity.setModifiedAt(new Date());
}
}
Have in mind that those classes must be accesible by hibernate, check this: Why Hibernate Envers is ignoring my custom RevisionEntity?
