The following is now possible:
@Configuration
public class AppConfig {
@Inject DataSource dataSource;
@Bean
public MyBean myBean() {
return new MyBean(dataSource);
}
@Configuration
static class DatabaseConfig {
@Bean
DataSource dataSource() {
return new EmbeddedDatabaseBuilder().build();
}
}
}
public static void main(String... args) {
AnnotationConfigApplicationContext ctx =
new AnnotationConfigApplicationContext(AppConfig.class);
ctx.getBean(MyBean.class); // works
ctx.getBean(DataSource.class); // works
}
Notice that the @Import annotation was not used and that only AppConfig
was registered against the context. By virtue of the fact that
DatabaseConfig is a member class of AppConfig, it is automatically
registered when AppConfig is registered. This avoids an awkward and
redundant @Import annotation when the relationship is already implicitly
clear.
See @Configuration Javadoc for details.
Issue: SPR-8186
ClassMetadata implementations can now introspect their member (nested)
classes. This will allow for automatic detection of nested
@Configuration types in SPR-8186.
Issue: SPR-8358,SPR-8186
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
AbstractEnvironment and subclasses now register a reserved default
profile named literally 'default' such that with no action on the part
of the user, beans defined against the 'default' profile will be
registered - if no other profiles are explicitly activated.
For example, given the following three files a.xml, b.xml and c.xml:
a.xml
-----
<beans> <!-- no 'profile' attribute -->
<bean id="a" class="com.acme.A"/>
</beans>
b.xml
-----
<beans profile="default">
<bean id="b" class="com.acme.B"/>
</beans>
c.xml
-----
<beans profile="custom">
<bean id="c" class="com.acme.C"/>
</beans>
bootstrapping all of the files in a Spring ApplicationContext as
follows will result in beans 'a' and 'b', but not 'c' being registered:
ApplicationContext ctx = new GenericXmlApplicationContext();
ctx.load("a.xml");
ctx.load("b.xml");
ctx.load("c.xml");
ctx.refresh();
ctx.containsBean("a"); // true
ctx.containsBean("b"); // true
ctx.containsBean("c"); // false
whereas activating the 'custom' profile will result in beans 'a' and
'c', but not 'b' being registered:
ApplicationContext ctx = new GenericXmlApplicationContext();
ctx.load("a.xml");
ctx.load("b.xml");
ctx.load("c.xml");
ctx.getEnvironment().setActiveProfiles("custom");
ctx.refresh();
ctx.containsBean("a"); // true
ctx.containsBean("b"); // false
ctx.containsBean("c"); // true
that is, once the 'custom' profile is activated, beans defined against
the the reserved default profile are no longer registered. Beans not
defined against any profile ('a') are always registered regardless of
which profiles are active, and of course beans registered
against specific active profiles ('c') are registered.
The reserved default profile is, in practice, just another 'default
profile', as might be added through calling env.setDefaultProfiles() or
via the 'spring.profiles.default' property. The only difference is that
the reserved default is added automatically by AbstractEnvironment
implementations. As such, any call to setDefaultProfiles() or value set
for the 'spring.profiles.default' will override the reserved default
profile. If a user wishes to add their own default profile while
keeping the reserved default profile as well, it will need to be
explicitly redeclared, e.g.:
env.addDefaultProfiles("my-default-profile", "default")
The reserved default profile(s) are determined by the value returned
from AbstractEnvironment#getReservedDefaultProfiles(). This protected
method may be overridden by subclasses in order to customize the
set of reserved default profiles.
Issue: SPR-8203
- removed generics from Cache/CacheManager (they add no value since it's an SPI not API)
+ update docs and tests
+ renamed ConcurrentCacheFactoryBean to ConcurrentMapCacheFactoryBean
Revert signature of
ConfigurationClassPostProcessor#processConfigBeanDefinitions to its form
found in the 3.0.x line. Refactorings made during 3.1 development
caused otherwise package-private types such as
ConfigurationClassBeanDefinitionReader to escape through this public
method, causing issues for STS as well as being a general design issue.
Upon review, the refactorings could easily be backed out in favor of a
simpler approach, and this has been done.
This also means that ConfigurationClassBeanDefinitionReader can return
to package-private visibility, and this change has been made as well.
Issue: SPR-8200
@Autowired, @Value and other annotations cannot be applied within
Spring Bean(Factory)PostProcessor types, because they themselves
are processed using BeanPostProcessors. Javadoc and reference docs
have been updated to reflect.
Issue: SPR-4935, SPR-8213
A subtle issue existed with the way we relied on isCurrentlyInCreation
to determine whether a @Bean method is being called by the container
or by user code. This worked in most cases, but in the particular
scenario laid out by SPR-8080, this approach was no longer sufficient.
This change introduces a ThreadLocal that contains the factory method
currently being invoked by the container, such that enhanced @Bean
methods can check against it to see if they are being called by the
container or not. If so, that is the cue that the user-defined @Bean
method implementation should be invoked in order to actually create
the bean for the first time. If not, then the cached instance of
the already-created bean should be looked up and returned.
See ConfigurationClassPostConstructAndAutowiringTests for
reproduction cases and more detail.
Issue: SPR-8080
If the enclosing environment does not implement ConfigurableEnvironment,
then @PropertySource annotations are ignored because there is no way to
add them to the Environment. Now checking first to see if there are any
@PropertySource annotations present before issuing the warning.
Issue: SPR-8314
Chris Beams
Rossen Stoyanchev
Arjen Poutsma
Costin Leau
Oliver Gierke
Andy Clement