java - @Preload 的作用是什么(Jira Activity 对象)？

Question

我使用 Activity 对象来保存数据。这个注解具体有什么作用呢？

附注我找到了这个描述(https://ecosystem.atlassian.net/browse/AO-486):

We hit the problem several times where AO will load each field of an object by a separate SQL query: https://jira.atlassian.com/browse/CONFDEV-21100 https://jira.atlassian.com/browse/CONFDEV-21206 It can be bypassed with @Preload annotation on a class but preloading is not a default behaviour. Obviously not preload introduces a big performance hit when client code needs more than one attribute. I would imagine preloading would be a sensible default given that it would cause very little overhead

Answer 1

“@Preload”用于立即加载实体的所有字段。默认情况下，行为是仅急切加载 ID 字段并延迟加载实体内的其他字段。