更改JPA实体ID生成策略

Question

There is a JSF/JPA application with EclipseLink2 which has about 40 different Entity classes. The method used to generate the id for every Entity class is AUTO.

@Id
@GeneratedValue(strategy = GenerationType.AUTO)
Long id;

After about one weeks run in production, the Id numbers has passed more than 10,000. I am worries about the possibility of running out the long numbers in few years time.

So I searched the net and changed the Id Generation Strategy as below.

@Id
@GeneratedValue(strategy = GenerationType.AUTO, generator = "item_entity_seq_gen")
@SequenceGenerator(name = "item_entity_seq_gen", sequenceName = "ITEM_ENTITY_SEQ")
Long id;

But when a new Entity is been created, there is an error as follows.

How can I change the auto generation strategy so that there will be no threat to running out of long ids after the development stage.

Thanks in advance

Answer 1

正如评论中的isnot2bad所述，如果自动生成的ID几乎用完了，我已经放弃了生成单独ID的新方法。