Daniel Keir Haywood created CAUSEWAY-3707:
---------------------------------------------
Summary: [Perf] Preload mixin property values (when displayed in a
collection)
Key: CAUSEWAY-3707
URL: https://issues.apache.org/jira/browse/CAUSEWAY-3707
Project: Causeway
Issue Type: New Feature
Components: Viewer Wicket
Affects Versions: 2.0.0
Reporter: Daniel Keir Haywood
Fix For: 2.1.0
Following on and similar to CAUSEWAY-3706, if an object has a mixin property,
and that property is part of a collection, then we'll get an N+1 style of issue
when each object's (row's) property is evaluated.
To load these instead in bulk, we could have a preload hook (an optional
interface to be implemented by mixins) that would return a `List<Bookmark>`.
The Wicket viewer would call this for each object resolved and would then
aggregate the Bookmarks and fire an event for the JPA/JDO persistence store to
load them in bulk.
This wouldn't be an exact science, but ought to reduce database queries to some
extent. It would probably be easier for JPA than JDO because the underlying
Ids of the objects that need to be resolved are (probably) easier to obtain.
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
