The `spring.resources.static-locations` key (see `ResourceProperties`)
lists many locations by default, including `"classpath:/static"` and
`"/"`. The latter is about exposing resources located in the root
servlet location.
Reactive web applications don't depend on a Servlet-related
`ApplicationContext`/`ResourceLoader`, so `"/"` is then resolved as
`"classpath:/"`, which exposes the whole classpath.
To avoid such situations, the `GenericReactiveWebApplicationContext`
overrides the `getResourceByPath(String path)` method and always returns
non existent resources if the path starts with `"/"`.
Fixes gh-8485
Previously, when the liquibase.url, .username, and .password
properties were used to configure a DataSource specifically for
Liquibase that DataSource would never be explicitly closed. As it is
created by DataSourceBuilder with no explicitly configured type it
will use whichever connection pool is available and, therefore, will
create and keep open the pool's minimum number of connections. This
is an unnecessary use of resources both in the application and in the
database.
This commit updates LiquibaseAutoConfiguration so that if it uses
DataSourceBuilder to create a DataSource then it will also close that
DataSource once the database has been migrated.
Closes gh-9218
This commit allows to specify a deprecation level to a manual metadata
entry. The purpose of that new attribute is to distinguish cases where
the property is still bound (default) from cases where the property no
longer exists and won't be bound.
This gives the opportunity to IDEs to still show the property as an
error and offer documentation and an action to rename it if a
replacement exists.
Closes gh-9074
This commit allows *any* type of `RouterFunction` to be injected in the
WebFlux.fn auto-configuration; previously the `RouterFunction<T>` would
restrict injected beans to a single parameterized type.
Doing requires using the `RouterFunction.andOther` method to collect
them.
Fixes gh-9181
This commit removes the automatic configuration of the Netty request
factory in RestTemplateBuilder, for the following reasons:
* as of Spring 5, `Netty4ClientHttpRequestFactory` is now deprecated
* there are quite a few issues logged in Spring Framework (duplicate
headers, such as SPR-15446 and SPR-15476)
* by default, the `Netty4ClientHttpRequestFactory` is adding a
"Connection: close" request header to all outgoing requests, which
means that the underlying HTTP connection won't be reused between
requests (which is a performance problem)
In that case, using any other request factory is a better choice for
Spring Boot 2.0+.
Note that the `RestTemplateBuilder` still allows to provide it manually
with the request factory to use. Developers can still choose this option
and will be aware of its deprecation status.
Fixes gh-9150
