hibernate native Id generator tip
Tuesday, October 14, 2008 16:38Posted in category HowTo & Tutorial
if you are working with more than one db vendor (mysql/postgresql/oracle ,vs…) both at the same project. you may like this a lot 
the configuration sample below allow to run your hibernate application at two or more database vendors without changing any code
it will use both mysql native id generator and different hibernate sequences for each of your mapping objects (not just one hibenate sequence for all objects)
@Entity
@Table(name = "ORM_Company")
public class Company implements java.io.Serializable {
@Id
@GeneratedValue(strategy = GenerationType.AUTO, generator = "ORM_Company_SEQ")
@SequenceGenerator(name = "ORM_Company_SEQ", sequenceName = "ORM_Company_SEQ")
@Column(name = "id")
private java.lang.Long id = 0L;
//...
}
OR as in old xml style :
<class name="your.pack.Company" table="ORM_Company" dynamic-update="true" > <id name="id" type="long" column="id"> <generator class="native" > <param name="sequence">ORM_Company_SEQ</param> </generator> </id>
Related posts:
You can follow any responses to this entry through the RSS 2.0 feed.
You can leave a response, or trackback from your own site.
Darren Bell says:
October 15th, 2008 at 4:30 am
These are the annotations we use. This is because, by using a uuid, we have a distributable/replicate able database out of the box.
@Id
@GeneratedValue(generator = “system-uuid”)
@GenericGenerator(name = “system-uuid”, strategy = “uuid”)
@Column(length = 32, name = EntityObject.Columns.ID)
@DocumentId(name=Attributes.ID)
private String id;
Works on every db
altuure says:
October 15th, 2008 at 5:50 am
thanks darren ,
this configuration would be more ideal if you would use a guid-string identifier of course