Indicates the source of timestamps for an entity version property of type java.sql.Timestamp:

• SourceType#VM indicates that the virtual machine current instance is used, and
• SourceType#DB indicates that the database current_timestamp function should be used.

For example, the following timestamp is generated by the database:

@Version @Source(DB)
private LocalDateTime version;

This annotation is always used in conjunction with the JPA @Version annotation.