Re: [eclipselink-users] Query returning stale results existing

["Tim Hollosy" <hollosyt@xxxxxxxxx>]

Don't forget this bug when working with @Cache settings:

https://bugs.eclipse.org/bugs/show_bug.cgi?id=231843

To Quote Shawn:

"If you define a "default" cache type in
persistence.xml then this is not treated like a default but rather as a global
override and any cache type setting in either annotations or mapping files are
ignored thus rendering it impossible to configure caches on an Entity by Entity
basis."

./tch



On Thu, Nov 20, 2008 at 9:21 AM, James Sutherland <jamesssss@xxxxxxxxx> wrote:
>
> You can set cache setting per class in the EclipseLink orm XML file.  This
> file can be used to supplement annotations or the JPA orm XML file, and will
> be ignored by other JPA implementations, so is a portable way.  You can also
> use the @Cache annotation, which is still portable as it will be ignored by
> other JPA implementation, but does require a compile dependency.
>
> persistence.xml properties can only do so much, more advanced settings need
> a real XML file.
>
>
>
> cowwoc wrote:
>>
>>
>> James Sutherland wrote:
>>>
>>> EntityManager.refresh() is the only way in the JPA spec to ensure an
>>> object is refreshed.  If you use optimistic locking or the the read
>>> lock() API you can guarantee that the transaction will fail if the object
>>> is out of date.
>>>
>>> EclipseLink also defines a Query hint "eclipselink.refresh" to allow a
>>> query to force a refresh.  The are also may different caching options,
>>> such as invalidation, auto-refreshing, isolation, and cache coordination.
>>>
>>
>> EntityManager.refresh() worked :)
>>
>> PS: It would be nice if cache expiration settings were available at the
>> persistence.xml level. Ideally I want to isolate all EclipseLink-specific
>> features to that file and keep my classes portable across all JPA
>> implementations.
>>
>> Thank you,
>> Gili
>>
>
>
> -----
> ---
> http://wiki.eclipse.org/User:James.sutherland.oracle.com James Sutherland
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