In order to be able to use text blocks and other new Java language
features, we are upgrading to a recent version of Checkstyle.
The latest version of spring-javaformat-checkstyle (0.0.28) is built
against Checkstyle 8.32 which does not include support for language
features such as text blocks. Support for text blocks was added in
Checkstyle 8.36.
In addition, there is a binary compatibility issue between
spring-javaformat-checkstyle 0.0.28 and Checkstyle 8.42. Thus we cannot
use Checkstyle 8.42 or higher.
In this commit, we therefore upgrade to spring-javaformat-checkstyle
0.0.28 and downgrade to Checkstyle 8.41.
This change is being applied to `5.3.x` as well as `main` in order to
benefit from the enhanced checking provided in more recent versions of
Checkstyle.
Closes gh-27481
In 5.3 it became possible to handle exceptions from any handler through
ExceptionHandler's in a ControllerAdvice class, but this is not
mentioned in the docs
See gh-22619, gh-27338
Since the team no longer needs the ability to treat Eclipse projects as
WTP modules, this commit removes the obsolete custom WTP configuration
for importing projects into Eclipse IDE.
See gh-27407
This commit also fixes a bug introduced in commit e99b43b91e, where
java.time.Duration strings were converted to milliseconds and then
converted again using the configured TimeUnit.
See gh-27309
This commit improves the documentation for @Cacheable to point out that
`null` will be stored in the cache for an empty `Optional` return value.
Closes gh-27184
A side effect of 71995a9087 caused the
dynamic table of contents in the left-hand side navigation to no longer
be displayed, likely due to the missing "details" DIV.
This commit addresses this issue by applying the custom header only to
index.adoc.
Consequently, the TOC is now displayed again on all pages except the
index page, but the customized header is no longer applied to those
pages.
We may revisit this issue if we decide that we want the custom header
on all pages (and not just the index page).
Closes gh-27177
