Of course, the method would be called add() and would return void....this is
consistent with the notion that Repositories model a persistent Collection.
@RequiresTransaction
public void add(E entity) {
this.entityManager().persist(entity);
}
-----Original Message-----
From: Roos, Robin [mailto:[email protected]]
Sent: 26 November 2015 12:21
To: [email protected]
Subject: Extending EntityRepository interface and EntityRepositoryHandler class
Hi Folks
My developers are building a JPA application in which Domain objects remain
entirely within the transactional context. This means we never do
detach/merge, whether implicitly or explicitly.
I am concerned that the default Save() implementation in
EntityRepositoryHandler would incur a merge() if an already-persistent instance
was passed to save().
@RequiresTransaction
public E save(E entity) {
if(this.context.isNew(entity)) {
this.entityManager().persist(entity);
return entity;
} else {
return this.entityManager().merge(entity);
}
}
To preclude this I would like to extend EntityRepositoryHandler to provide an
implementation of a new method add(), as follows:
@RequiresTransaction
public E save(E entity) {
this.entityManager().persist(entity);
return entity;
}
Presumably I would put this method signature into interface MyEntityRepository
extends EntityRepository, and the implementation into class
MyEntityRepositoryHandler extends EntityRepositoryHandler. Repository
interfaces would then implement MyEntityRepository. (We do not have any
Repository "implementations" since DeltaSpike takes care of that for us.)
But how do I get it all joined up, i.e. how to I nominate my new Handler to be
used when CDI is working its magic on the Repository interfaces?
Thanks, Robin.
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Nissan Motor Manufacturing (UK) Limited is a limited liability company
registered in England and Wales under number 01806912 with its registered
office at Washington Road, Sunderland, Tyne and Wear SR5 3NS.
CONFIDENTIALITY NOTICE AND DISCLAIMER
This message including any attachments to it (Message) is private and
confidential and may contain proprietary or legally privileged information. If
you have received this Message in error, please send an email to
[email protected] with a copy of this Message and remove it from
your system. You must not, directly or indirectly, use, disclose, distribute,
print or copy any part of this Message if you are not the intended recipient.
The NISSAN EUROPE S.A.S group of companies (NISSAN) reserve the right to
monitor all e-mail communications through its networks.
NISSAN is not liable for the proper/complete transmission or any delay in the
receipt of this Message . Whilst NISSAN takes care to protect its systems from
electronic virus attack or other harmful event, NISSAN gives no warranty that
this Message is free of any virus or other harmful matter and accepts no
liability for any loss or damage resulting from the recipient receiving,
opening or using it.
Any views or opinions expressed in this Message are those of the author and do
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