Update the jar `Handler` class to support a non-reflective fallback
mechanism when possible. The updated code attempts to capture a regular
jar URL before our handler is installed. It can then use that URL as
context when creating the a fallback URL. The JDK jar `Handler` will
be copied from the context URL to the fallback URL.
Without this commit, resolving new Tomcat URLs of the form
`jar:war:file:...` would result in an ugly "Illegal reflective access"
warning.
Fixes gh-18631
Refine the `PortInUseException` logic in `NettyWebServer` to only throw
an exception if the port is set. The prevents a misleading exception
from being thrown when a domain socket is being used.
Closes gh-24529
Update `NettyWebServer` to deal with any `UnsupportedOperationException`
thrown from `DisposableServer`. Specifically, this commit allows the
`NettyWebServer` to work with domain socket backed servers which cannot
provide a port.
Fixes gh-24529
Prior to this commit, running the bootBuildImage Gradle task on a
project configured for war packaging would result in a jar file being
built and used in the image instead of the war file. With this commit
an error will be thrown from the plugin in this case.
Fixes gh-24521
Add an overloaded `ConfigDataEnvironmentPostProcessor.applyTo` method
that accepts a listener that can used to track the updates that were
applied to the `Environment`.
The listener can be used to track the which `ConfigDataLocation` and
the `ConfigDataResource` were used to add a `PropertySource`. The lister
can also be used to tell which profiles were applied.
This enhancement is being added in a patch release because it's will
be useful for Spring Cloud 2020.0.0.
Closes gh-24504
Allow directory locations that exist but do not contribute properties
to be specified without an `optional:` prefix. This commit fixes logic
introduced in commit 3dc03ac275 which didn't account for the fact that
a directory might contain only profile specific property files and that
profiles might not always be active.
Closes gh-24499
