From me
«Draculaboyman»*
El may 3, 2011 2:02 a.m., "Jerome Thoma" <thoma352@googlemail.com> escribió:
> Hi everyone,
> I have a question about EntityProxy vs. ValueProxy and efficiency issues. I
> need to load a list of SubProxy objects using RF for display in a listbox
> inside an editor for an encompassing SuperProxy type. No SubProxy instance
> is modified by the editor, but because RF does not support inheritance, I
> must use EntityProxy as SubProxy's super-type. This means unfortunately that
> on loading the list of SubProxy objects (using one efficient Hibernate
> call), RF launches one find operation for each objects (thus creating X more
> Hibernate calls) which is very inefficient. Is this desired behaviour and
> how do I optimise my loading code. Currently it takes several seconds to
> load a list of ca. 100 SubProxy objects. I have encountered this problem
> before and solved it by using ValueProxy objects which are not
> version-checked by the RF engine. Could someone please explain me why the RF
> engine does a separate version check for each EntityProxy that I just
> retrieved from the DB?
>
> Thanks for sharing your knowledge
> Jerome
>
> --
> You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group.
> To post to this group, send email to google-web-toolkit@googlegroups.com.
> To unsubscribe from this group, send email to google-web-toolkit+unsubscribe@googlegroups.com.
> For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.
>
-- > Hi everyone,
> I have a question about EntityProxy vs. ValueProxy and efficiency issues. I
> need to load a list of SubProxy objects using RF for display in a listbox
> inside an editor for an encompassing SuperProxy type. No SubProxy instance
> is modified by the editor, but because RF does not support inheritance, I
> must use EntityProxy as SubProxy's super-type. This means unfortunately that
> on loading the list of SubProxy objects (using one efficient Hibernate
> call), RF launches one find operation for each objects (thus creating X more
> Hibernate calls) which is very inefficient. Is this desired behaviour and
> how do I optimise my loading code. Currently it takes several seconds to
> load a list of ca. 100 SubProxy objects. I have encountered this problem
> before and solved it by using ValueProxy objects which are not
> version-checked by the RF engine. Could someone please explain me why the RF
> engine does a separate version check for each EntityProxy that I just
> retrieved from the DB?
>
> Thanks for sharing your knowledge
> Jerome
>
> --
> You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group.
> To post to this group, send email to google-web-toolkit@googlegroups.com.
> To unsubscribe from this group, send email to google-web-toolkit+unsubscribe@googlegroups.com.
> For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.
>
You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group.
To post to this group, send email to google-web-toolkit@googlegroups.com.
To unsubscribe from this group, send email to google-web-toolkit+unsubscribe@googlegroups.com.
For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.
No comments:
Post a Comment