Closes gh-3382

Closes gh-3381
Closes gh-3383

Closes gh-3380

Closes gh-3379

Previously, JacksonHttpMessageConvertersConfiguration would configure a
general-purpose MappingJackson2HttpMessageConverter only if there was
no existing MappingJackson2HttpMessageConverter in the application
context. This was problematic when a
TypeConstrainedMappingJackson2HttpMessageConverter bean was present.
Such a bean is only capable of performing conversion for a specific
type, and therefore is no substitute for a general purpose converter,
yet its presence was causing the auto-configuration of a general
purpose converters to be turned off. This would leave Spring MVC’s
default converter being used for application/json requests which would
not honour the user’s Jackson configuration.

This commit enhances @ConditionalOnMissingBean so that the annotation
can be used to specify one or more types that should be ignored when
searching for beans. This allows the
TypeConstrainedMappingJackson2HttpMessageConverter beans that are
published by Spring Data REST to be ignored such that the
general-purpose MappingJackson2HttpMessageConverter is still
auto-configured.

Fixes gh-2914

Closes gh-3369

Closes gh-3375

Update MustacheViewResolver so that buildView() is called to create
the MustacheView. This sets fields such as `contentType` and allows us
to remove explicit setApplicationContext() and setServletContext()
calls.

Fixes gh-3265

Fixes gh-3276

Fixes gh-3356

GzipFilterProperties uses HttpMethod so GzipFilterAutoConfiguration,
which uses GzipFilterProperties, needs to be conditional on HttpMethod
being on the classpath.

Closes gh-3362

* pr/3324:
  Fixup sample Ant build

Fixes gh-3324

If java.io.tmpdir is configured to a directory that does not exist,
calls to File.createTempFile will fail with an IOException with the
message "The system cannot find the path specified". Unfortunately,
the path the was specified is not included in the message.

Rather than trying to automatically create the directory in what may
be a misconfigured location, we now include the value of
java.io.tmpdir in our own exception's message. Hopefully this will
help users to figure out what they've done wrong.

Closes gh-3307

The maximum and minimum number of connections are no metrics so these
are not exposed. Fix the doc that stated the contrary.

Fixes gh-3319

Closes gh-3308

Closes gh-3299

Previously, when an exception was thrown by a Controller in an
application deployed to a servlet container the exception that was
handled would be Spring Framework’s NestedServletException rather than
the exception thrown by the application. Furthermore, when an exception
was thrown or the response was used to send an error, the
javax.servlet.error.request_uri request attribute would not be set. This
differed from the behaviour in an executable jar/war where the exception
would be the one thrown by the application, and the request_uri
attribute would be set.

This commit updates ErrorPageFilter, which is only involved in a servlet
container, to unwrap a NestedServletException so that it’s the
application’s exception that’s handled, and to set the request_uri
attribute in the event of an exception being thrown or an error being
sent.

Closes gh-3249

Closes gh-3027

Previously, an address that ended in a "/" would result in the virtual
host being an empty string. This was inconsistent with setVirtualHost
which would map an empty string to "/".

This commit updates the address parsing logic to call setVirtualHost
rather than assigning the value directly to this.virtualHost. This
ensures that the special handling for an empty string is applied
consistently.

Closes gh-3304

By default, SpringApplication attempts to deduce the application class
by looking for a main method in the stack. This does not work when
the application is launched by a servlet container via
SpringBootServletInitializer as there's either no main method in the
stack, or the main method is that of the servlet container, rather
than the application.

This commit updates SpringBootServletInitializer to configure the
main class of the SpringApplication that it creates to be the
application's SpringBootServletInitializer subclass. This is done
prior to calling configure, so the main class can still be specified
by the application if required.

Closes gh-3061

Closes gh-3289

Closes gh-3302

Closes gh-3298

* gh-3255:
  Ignore failures when closing war files in tests

Update WarPackagingTests to ignore any IOExceptions when closing
created war files. Exceptions were sometimes thrown when running on a
Linux NTFS mount.

Fixes gh-3255

See gh-3274

See gh-3276

See gh-3274

Previously, DefaultRepositorySystemSessionAutoConfiguration would
read the local repository configuration from settings.xml, but did
not perform any property interpolation. This would leave placeholders
such as ${user.home} as-is and result in the use of the wrong
location. To address this, the code that reads settings.xml has been
updated to provide the current System properties as a property
interpolation source.

RepositoryConfigurationFactory configures the local repository as a
"remote" repository when the local repository location has been
overridden. This allows spring grab to copy dependencies from the
local repository into the grab output location (configured via the
grape.root system property) rather than having to download them again.
This logic did not consider the customization of the local repository
location via settings.xml so the dependencies would be downloaded again.
To address this, RepositoryConfigurationFactory has been updated to
attempt to use the location configured in settings.xml, before falling
back to the default location.

The logic that reads settings.xml has deliberately been duplicated. It
could have been extracted into a separate class, but this is only a
temporary measure until gh-3275 is tackled. Duplication was deemed
preferable to adding a new public class in 1.2.x that we’d then want to
remove in 1.3.

Closes gh-3274

Closes gh-3273

Create an EmbeddedVelocityToolboxView which supports loading toolbox.xml
files from the application classpath as well as the ServletContext. The
VelocityAutoConfiguration class has been updated to use the new view.

This change allows the `spring.velocity.toolbox-config-location`
property to work with embedded servlet containers.

Fixes gh-2912

Update EntityScanRegistrar so that multiple @EntityScan annotations can
be used with a single application. Previously, when an application used
multiple annotations only the first one found would get applied. This
changes alters that to augment the packages that will be scanned.

Fixes gh-2757

Update appendix example to use the more common `/var/log` folder rather
than `/var/logs`.

Fixes gh-3225

Previously, the VcapApplicationListener would discard any service
credential value that wasn't a String, Number, Map, Collection, or
null.  This was particularly a problem for services that exposed a
value as a JSON boolean.  This change takes booleans in the credential
payload into account, converting them to Strings so that they will
pass through the properties system properly.  There's no real downside
to this as Spring will coerce them back into Booleans if needed, by
the application.

Fixes gh-3237

Fixes gh-3209