This change involves a general upgrade to Jackson 2.3 in our build.

Issue: SPR-11261

Issue: SPR-10469

Also completing 4.0's consistency efforts between Spring's cache adapters.

Add 'spring-framework-bom' meta-project that contains the other projects
in a dependencyManagement section.

Issue: SPR-11138

This commit adds an XML namespace equivalent of @EnableWebSocket and
@EnableWebSocketMessageBroker. Those are <websocket:handlers> and
<websocket:message-broker> respectively.

Examples can be found in the test suite.

This commit also alters the way MessageHandler's subscribe to their
respective MessageChannel's of interest. Rather than performing the
subscriptions in configuration code, the message channels are now
passed into MessageHandler's so they can subscribe themselves on
startup.

Issue: SPR-11063

Fix remaining Java compiler warnings, mainly around missing
generics or deprecated code.

Also add the `-Werror` compiler option to ensure that any future
warnings will fail the build.

Issue: SPR-11064

Before this change spring-messaging contained a few WebSocket-related
classes including WebSocket sub-protocol support for STOMP as well
as @EnableWebSocketMessageBroker and related configuration classes.

After this change those classes are located in the spring-websocket
module under org.springframework.web.socket.messaging.

This means the following classes in application configuration must
have their packages updated:

org.springframework.web.socket.messaging.config.EnableWebSocketMessageBroker
org.springframework.web.socket.messaging.config.StompEndpointRegistry
org.springframework.web.socket.messaging.config.WebSocketMessageBrokerConfigurer

MessageBrokerConfigurer has been renamed to MessageBrokerRegistry and
is also located in the above package.

Replace `hsqldb:hsqldb:1.8.0.10` with `org.hsqldb:hsqldb:2.3.1` and
fix breaking tests.

Issue: SPR-10947

As of Gradle 1.8, ‘testReport true’ is deprecated. Thus in order to
generate TestNG reports alongside JUnit reports with Gradle 2.0 and
beyond, we are now using:

  getReports().getHtml().setEnabled(true)

Update InstrumentationSavingAgent to allow it to be used with the
Attach API

Issue: SPR-11083

Issue: SPR-11099

Generate docbook xml from the asciidoc reference guide and use the
docbook-reference-plugin to generate HTML (single and multi-page) and
PDF documentation.

Issue: SPR-11096

With spring-test compiling against Servlet 3.0 it is no longer required
to compile Spring MVC Test sources separately (from spring-test).

This commit migrates to asciidoctor to ease writing documentation.

Issues: SPR-10960

Upgraded to Apache HttpComponents HttpClient 4.3.1 and HttpAsyncClient 4.0 GA, as well as Jackson 2.2.2

Issue: SPR-11014

This commit upgrades Jetty to the latest available 9.1.x version while
also preserving compatibility with 9.0.x.

- add WebSocketHttpHeaders
- client-side support for WebSocket extensions
- DefaultHandshakeHandler updates
- replace use of ServletAttributes in JettyRequestUpgradeStratey
- upgrade spring-web to jetty 9.0.5

Issue: SPR-11028

The key contract is MvcUrls. An instance is automatically created with
the Spring MVC namespace and the MVC Java config but can also be easily
created in any configuration.

Some example tests can be found in DefaultMvcUrlsTests.

Issue: SPR-10665, SPR-8826

MvcUriComponentsBuilder allows creating URIs that point to Spring MVC
controller methods annotated with @RequestMapping. It builds them by
exposing a mock method invocation API similar to Mockito, records the
method invocations and thus builds up the URI by inspecting the mapping
annotations and the parameters handed into the method invocations.

Introduced a new SPI UriComponentsContributor that should be implemented 
by HandlerMethodArgumentResolvers that actually contribute path segments 
or query parameters to a URI. While the newly introduced 
MvcUriComponentsBuilder looks up those UriComponentsContributor instances 
from the MVC configuration.

The MvcUriComponentsBuilderFactory (name to be discussed - MvcUris maybe?) 
prevents the multiple lookups by keeping the UriComponentsBuilder 
instances in an instance variable. So an instance of the factory could 
be exposed as Spring bean or through a HandlerMethodArgumentResolver to 
be injected into Controller methods.

Issue: SPR-10665, SPR-8826

This version fixed bugs and improved performance.
New features: "select multiple attributes" and
"Array operations and slicing improved" (a new example
has been added in tests to reflect that).

See https://github.com/jayway/JsonPath/blob/master/README

Issue: SPR-10990

This change upgrades reactor to 1.0 RC1 and also removes the
reactor-based message channel in favor of the one available from
org.projectreactor:reactor-spring.

Unfortunately, the JCache API changed quite a bit since 0.6. We're building against a snapshot of JCache 0.11 now, tracking its way to final after the Public Review Ballot.

Formerly known as the Grails BeanBuilder, now in Spring proper. Based on https://github.com/spring-projects/spring-framework/pull/355 but heavily refactored and restructured.

Issue: SPR-7123

This reverts commit d4a0e628, reversing
changes made to 8abe9497.

This reverts commit 1ba806b1.