Builder for SpringApplication and ApplicationContext instances with
convenient fluent API and context hierarchy support. Simple example
of a context hierarchy:
new SpringApplicationBuilder(ParentConfig.class)
.child(ChildConfig.class).run(args);
Another common use case is setting default arguments, e.g.
active Spring profiles, to set up the environment for an application:
new SpringApplicationBuilder(Application.class).profiles("server")
.defaultArgs("--transport=local").run(args);
If your needs are simpler, consider using the static convenience
methods in SpringApplication instead.
[#49703716] [bs-116] Parent context for some beans maybe?
The `Tomcat.start()` has to happen to initialize the `ServletContext`
but we can immediately stop the connector and then restart it when
the context is finished refreshing. Seems to make curl fail quickly
if an app is slow to start.
Management endpoints are still secure by default if
Spring Security is present, but now the default
user details have an ADMIN role, and a random password
(which is logged at INFO level if not overridden).
To override you add management.user.password (name, role)
to external properties.
[Fixes#53029715] [bs-203]