As part of the upgrade, this commit removes the use of any API that
has been deprecated in 2.9.0.pr1. This includes the config props
endpoint's use of SerializationFeature.WRITE_NULL_MAP_VALUES. This
has been replaced with configuring serialization inclusion to only
include properties with non-null values. This means that all
null-valued properties will no longer be serialized, not just those
that are an entry in a map.
Closes gh-8604
Closes gh-8537
Restructure `org.springframework.boot.autoconfigure.web` to better align
with the new package structure in `spring-boot`.
Auto-configuration is now split into client, servlet and reactive
sub-packages. In addition a new `http` package now handles common
HTTP concerns.
Fixes gh-8616
Unify common for from the abstract `ServletWebServerFactory` and
`ReactiveWebServerFactory` classes. Common code is now located in
`AbstractConfigurableWebServerFactory`.
Fixes gh-8631
Create a new `SpringBootExceptionReporter` interface so that a direct
link between `SpringApplication` and `FailureAnalyzers` is no longer
needed.
This prevents package tangle warnings and allows for cleaner separation
of concerns.
Fixes gh-8612
Separate logging ApplicationListeners classes to a different package
so that the root `logging` package is no longer aware of `context`
concerns.
Fixes gh-8611
Rework `org.springframework.boot.context.embedded` to relocate classes
to `org.springframework.boot.web`. Packages are now organized around
the following areas:
Packages for shared concerns, for example the `WebServer` interface
to start/stop a server and the common configuration elements:
- org.springframework.boot.web.context
- org.springframework.boot.web.server
Servlet specific packages:
- org.springframework.boot.web.servlet.server
- org.springframework.boot.web.servlet.context
- org.springframework.boot.web.servlet.filter
Reactive specific packages:
- org.springframework.boot.web.reactive.context
- org.springframework.boot.web.reactive.server
Embedded server implementations (both reactive and servlet):
- org.springframework.boot.web.embedded
In addition:
- Rename `EmbeddedServletContainerFactory` to `ServletWebServerFactory`
to align with the `ReactiveWebServerFactory`.
- Rename `EmbeddedWebApplicationContext` to
`ServletWebServerApplicationContext` and
- Rename `EmbeddedReactiveWebApplicationContext` to
`ReactiveWebServerApplicationContext`.
- Add checkstyle rules to restrict imports.
- Fixup all affected code to use the correct imports and local names.
Fixes gh-8532
