CreationTimestamp (Hibernate Javadocs)

```
@Retention(RUNTIME)
@Target({FIELD,METHOD})
public @interface CreationTimestamp
```
Specifies that the annotated field of property is a generated creation timestamp. The timestamp is generated just once, when an entity instance is inserted in the database.
By default, the timestamp is generated by in memory, but this may be changed by explicitly specifying the source(). Otherwise, this annotation is a synonym for @CurrentTimestamp(timing=INSERT,source=VM).

See Also:

CurrentTimestamp

- Optional Element Summary
  
  Optional Elements
  Modifier and Type Optional Element Description
  
  SourceType source
  Specifies how the timestamp is generated.

- Element Detail
  - source
```
SourceType source
```
    Specifies how the timestamp is generated. By default, it is generated in memory, which saves a round trip to the database.
    
    Default:
    
    org.hibernate.annotations.SourceType.VM