Prior to this commit, Actuator `Endpoint` instantiations would be
guarded by `@ConditionalOnEnabledEnpoint` condition annotations. This
feature saves resources as disabled endpoints aren't unnecessarily
instantiated.
By default, only `"health"` and `"info"` endpoints are exposed over the
web and all endpoints are exposed over JMX.
As of gh-16090, JMX is now disabled by default. This is an opportunity
to avoid instantiating endpoints if they won't be exposed at all, which
is more likely due to the exposure defaults.
This commit adds a new `@ConditionalOnExposedEndpoint` conditional
annotation that checks the `Environment` for configuration properties
under `"management.endpoints.web.exposure.*"` and
`"management.endpoints.jmx.exposure.*"`. In the case of JMX, an
additional check is perfomed, checking that JMX is enabled first.
The rules implemented in the condition itself are following the ones
described in `ExposeExcludePropertyEndpointFilter`.
See gh-16093
4ffbe6c9e8