In Enterprise JavaBeans 3.0 (O'Reilly 2006) it states "The AUTO strategy tells
the persistence provider that you are allowing it to generate the key for you"
(page 94).
I don't specifically know the Hibernate implements this feature, but might I
suggest that you utilize the features of your database to create primary keys
instead.
With Postgresql you could use a mapping like this:
@Id
| @Column(name = "id", unique = true, nullable = false)
| @SequenceGenerator(name="identifier", sequenceName="ppl_id_seq",
allocationSize=1)
| @GeneratedValue(strategy=GenerationType.SEQUENCE,
generator="identifier")
| @NotNull
| public int getId()
| {
| return this.id;
| }
In this manner Hibernate would assign primary keys from the Postgresql sequence
rather than internally. This would allow Hibernate to "play nicely" with other
database users.
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