On 7/10/2013 1:57 PM, Ireland, Evan wrote:
> Linda,
>
> In the javadocs, we see:
>
> "... element collections and relationships owned by the entity that are contained in join tables will be locked ..."
>
> Did we specify what it means to lock an element collection or relationship, if other than locking the individual entity instances that those collections/relationships refer to?
>
The target entities aren't locked, but rather the join table data (i.e., for many-many relationships and
unidirectional one-to-ones).
> Or do some folks interpret this locking to include anti-insert, anti-delete locking?
>
> -----Original Message-----
> From: Linda DeMichiel [mailto:linda.demichiel_at_oracle.com]
> Sent: Thursday, 11 July 2013 7:50 a.m.
> To: jsr338-experts_at_jpa-spec.java.net
> Subject: [jsr338-experts] Re: locks and fetch graphs / eager fetching
>
> Hi Christian,
>
> On 7/10/2013 12:55 AM, Christian von Kutzleben wrote:
>> Dear group,
>>
>> In our understanding EntityManager.lock() only applies the lock to the specified entity and
>> also during lazy loading triggered by object navigation locks won't get propagated.
>>
>
> Yes. However, the javax.persistence.lock.scope property may be used to extend the locking
> to element collections and owned relationships in join tables.
>
>> But if a user specifies a lock-mode in the find or refresh method or for a query,
>> is this lock-mode supposed to be applied to all objects fetched* along because
>> of FetchType.EAGER or a configured fetch graph as well?
>>
>> *fetched, or would be fetched if not already in context
>>
>
> No (however, again the lock.scope property may be applied to the entity that is the target
> of the operation).
>
> regards,
>
> -Linda
>
>
>> Thank you!
>>
>> Christian
>>
>> --
>>
>> *Christian von Kutzleben*
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