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managing in-memory references held on the owning side [message #542104]

Wed, 23 June 2010 21:10

Fericit Bostan

Messages: 68
Registered: June 2010

Member

I see in JPA 2.0 spec that there is the statement:

Quote:

It is the developer's responsibility to keep the in-memory references held on the owning side and those held on the inverse side consistent with each other when they change.

I remember this from the 1.0 spec as well, where I had to manage the relationships. So I'm guessing that this still holds true as it is printed in the 2.0 spec.

I was just wondering if there was an easier way, that EclipseLink may have implemented so I don't need to manage these exclusively, specifically, during a remove operation. Currently, when I remove an entity from the EntityManager

EntityManager.remove(entity)

I am removing the associations in the @PreRemove method I have defined on each of my Entity beans that require this management.

    @PreRemove
    protected void preRemove() {
		getParentObject().getSomeCollection().remove(this);  	
    }

Is this the cleanest way to handle the management of those relationships or can I improve on this?

Thanks for the help...

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Re: managing in-memory references held on the owning side [message #542152 is a reply to message #542104]

Thu, 24 June 2010 05:41

Tom Eugelink

Messages: 817
Registered: July 2009

Senior Member

> Is this the cleanest way to handle the management of those relationships
> or can I improve on this?

Personally I handle the relationships in the corresponding setters and getters (adders and removers for the collections). So a remove immediately removes it from in memory collections as well, not at storage time.

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