Constructors have been added to both ContextLoader and
ContextLoaderListener to support instance-based programmatic
registration of listeners within ServletContainerInitializer
implementations in Servlet 3.0+ environments, and more particularly
when using Spring 3.1's WebApplicationInitializer SPI.
Issue: SPR-7672
ContextLoader and FrameworkServlet now use
AnnotationAwareOrderComparator to support @Order usage; previously
supported only implementation of the Ordered interface.
GenericWebApplicationContext now implements
ConfigurableWebApplicationContext in order to be compatible with
Framework/DispatcherServlet and ContextLoader/Listener, especially with
regard to changes in SPR-7672 that allow for programmatic use of these
types within Servlet 3.0+ environments. For the first time, it's now
reasonable to imagine injecting a GWAC into DispatcherServlet; the most
robust way to accommodate this possibility is for GWAC to implement
CWAC.
The implementation is in name only, allowing for interchangable use of
GWAC anywhere, for example, an XWAC could otherwise go. Methods such
as setConfigLocation will throw UnsupportedOperationException if the
configLocation value actually contains text. Other methods are
implemented as no-ops or to throw UOE as appropriate.
Issue: SPR-7672
WebApplicationInitializer provides a programmatic alternative to the
traditional WEB-INF/web.xml servlet container deployment descriptor
for Servlet API 3.0+ environments.
This is done by building atop the new ServletContainerInitializer
support in Servlet 3.0. See SpringServletContainerInitializer for
complete details. And see WebApplicationInitializer Javadoc for
typical usage examples.
Issue: SPR-7672
AnnotationConfigApplicationContext and
AnnotationConfigWebApplicationContext both expose #register and #scan
methods as of the completion of SPR-8320. This change introduces a new
interface that declares each of these methods and refactors ACAC and
ACWAC to implement it.
Beyond information value, this is useful for implementors of the
ApplicationContextInitializer interface, in that users may create an ACI
that works consistently across ACAC and ACWAC for standalone (e.g.
testing, batch) or web (e.g. production) use.
Issue: SPR-8365,SPR-8320
Primarily for use in conjunction with ApplicationContextInitializer,
these new #scan and #register methods mirror those in
AnnotationConfigApplicationContext. #setConfigLocation
and #setConfigLocations methods remain for compatibility with
ContextLoader-style initialization, but have been locally overridden
and documented clearly.
AnnotationConfigWebApplicationContext#loadBeanDefinitions Javadoc has
also been updated to explain the processing logic for each of these
potential inputs.
Issue: SPR-8320
This new hook in the AbstractEnvironment lifecycle allows for more
explicit and predictable customization of property sources by
subclasses. See Javadoc and existing implementations for detail.
Issue: SPR-8354
