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Incrementing generated primary key in @PrePersist [message #1053103]

Thu, 02 May 2013 13:02

Markus KARG

Messages: 28
Registered: June 2011

Junior Member

As my JPA-based program and a third-party non-Java software need to share the same ID Generator, I had to do a trick: The third-party Software expects the value of the generator to be "next id", while JPA expects it to be "last id", so I simply did this:

* Set increment of @TableGenerator to 1, so JPA must SELECT again before each use.
* Added @PostPersist listener to simple switch from "last id" semantics to "next id semantics":

@PrePersist private void prePersist() {
    this.pk.id--;
}

This actually seems to work pretty well, but I like to know whether this is considered harmful in any particular situation, and whether it is actually a portable solution?

Thanks!
-Markus

[Updated on: Fri, 03 May 2013 06:18]

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