How to make string primary key hibernate. @GeneratedValue strategies

Question

My goal is to create an entity Device that has a unique field IMEI and I would like to use it as a primary key, and specify it at device registration time (manually specifie

Answer 1

A straightforward solution could be to use the @PrePersist annotation on your entity class.

Simply add the method

@PrePersist
private void ensureId(){
    this.setId(UUID.randomUUID().toString());
}

and get rid of the @GeneratedValue annotation.

PrePersist documentation: http://docs.oracle.com/javaee/5/api/javax/persistence/PrePersist.html

Stefano