Previously, when the mappings endpoint was not available, the beans
that provide mapping descriptions were still created. This resulted
in unnecessary CPU and memory usage collecting and storing
information that would never by used.
This commit updates the auto-configuration for the mappings endpoint
so that all the beans that it creates are conditional on the endpoint
being available, rather than only the endpoint bean itself.
Closes gh-23977
This commit updates DataSourceUnwrapper to take a separate interface
type argument if the target datasource has to be unwrapped, given that
the target type is usually not an interface.
Closes gh-24697
Previously, it was possible for Spring Integration, including its
built-in Micrometer support, to be auto-configured before the
Micrometer auto-configuration had defined the MeterRegistry bean. This
resulted in missing Spring Integration metrics.
Spring Integration is unusual in having its own built-in Micrometer
support that it configures itself. Rather than providing
auto-configuration for Integration's Micrometer support (Which isn't
needed), this commit introduces some auto-configuration that just
affects the ordering of the auto-configuration classes. This ordering
ensures that the MeterRegistry bean has been defined by Spring
Integration is auto-configured. This ensures that the MeterRegistry
bean is known to the BeanFactory when Spring Integration goes looking
for it.
See gh-24095
When running on Java 11 (where `@PostConstruct` is no longer part of
the JRE) and without a dependency on jakarta-annotation-api,
`@PostContruct` annotions are silently dropped. This leads to obscure and
hard-to-track down changes in the behaviour of our auto-configuration
as the `@PostConstruct`-annotated methods are not invoked.
To allow users to run on Java 11 without having jakarta-annotation-api
on the classpath, this commit removes use of `@PostConstruct` from main
code. A Checkstyle rule has also been added to prevent its usage in
main code from being reintroduced.
Closes gh-23723