Spring Context 6.1.4 · org.springframework.context.annotation.CommonAnnotationBeanPostProcessor

org.springframework.beans.factory.config.BeanPostProcessor implementation that supports common Java annotations out of the box, in particular the common annotations in the jakarta.annotation package. These common Java annotations are supported in many Jakarta EE technologies (e.g. JSF and JAX-RS).

This post-processor includes support for the jakarta.annotation.PostConstruct and jakarta.annotation.PreDestroy annotations - as init annotation and destroy annotation, respectively - through inheriting from InitDestroyAnnotationBeanPostProcessor with pre-configured annotation types.

The central element is the jakarta.annotation.Resource annotation for annotation-driven injection of named beans, by default from the containing Spring BeanFactory, with only mappedName references resolved in JNDI. The "alwaysUseJndiLookup" flag enforces JNDI lookups equivalent to standard Jakarta EE resource injection for name references and default names as well. The target beans can be simple POJOs, with no special requirements other than the type having to match.

Additionally, the original javax.annotation variants of the annotations dating back to the JSR-250 specification (Java EE 5-8, also included in JDK 6-8) are still supported as well. Note that this is primarily for a smooth upgrade path, not for adoption in new applications.

This post-processor also supports the EJB jakarta.ejb.EJB annotation, analogous to jakarta.annotation.Resource, with the capability to specify both a local bean name and a global JNDI name for fallback retrieval. The target beans can be plain POJOs as well as EJB Session Beans in this case.

For default usage, resolving resource names as Spring bean names, simply define the following in your application context:

<bean class="org.springframework.context.annotation.CommonAnnotationBeanPostProcessor"/>

For direct JNDI access, resolving resource names as JNDI resource references within the Jakarta EE application's "java:comp/env/" namespace, use the following:

<bean class="org.springframework.context.annotation.CommonAnnotationBeanPostProcessor">
  <property name="alwaysUseJndiLookup" value="true"/>
</bean>

mappedName references will always be resolved in JNDI, allowing for global JNDI names (including "java:" prefix) as well. The "alwaysUseJndiLookup" flag just affects name references and default names (inferred from the field name / property name).

Note

A default CommonAnnotationBeanPostProcessor will be registered by the "context:annotation-config" and "context:component-scan" XML tags. Remove or turn off the default annotation configuration there if you intend to specify a custom CommonAnnotationBeanPostProcessor bean definition!

Note

Annotation injection will be performed before XML injection; thus the latter configuration will override the former for properties wired through both approaches.

Modifier and Type	Class and Description
private static class	CommonAnnotationBeanPostProcessor.AotContribution `BeanRegistrationAotContribution` to inject resources on fields and methods.
private class	CommonAnnotationBeanPostProcessor.EjbRefElement Class representing injection information about an annotated field or setter method, supporting the @EJB annotation.
private class	CommonAnnotationBeanPostProcessor.LegacyResourceElement Class representing injection information about an annotated field or setter method, supporting the @Resource annotation.
protected abstract static class	CommonAnnotationBeanPostProcessor.LookupElement Class representing generic injection information about an annotated field or setter method, supporting @Resource and related annotations.
private class	CommonAnnotationBeanPostProcessor.ResourceElement Class representing injection information about an annotated field or setter method, supporting the @Resource annotation.

Modifier and Type	Field and Description
private boolean	alwaysUseJndiLookup
private transient BeanFactory	beanFactory
private static final Class<? extends Annotation>	ejbAnnotationType
private transient StringValueResolver	embeddedValueResolver
private boolean	fallbackToDefaultTypeMatch
private final Set<String>	ignoredResourceTypes
private final transient Map<String, InjectionMetadata>	injectionMetadataCache
private static final Class<? extends Annotation>	jakartaResourceType
private static final Class<? extends Annotation>	javaxResourceType
private transient BeanFactory	jndiFactory
private static final boolean	jndiPresent
private static final Set<Class<? extends Annotation>>	resourceAnnotationTypes
private transient BeanFactory	resourceFactory

Access	Constructor and Description
public	CommonAnnotationBeanPostProcessor() Create a new CommonAnnotationBeanPostProcessor, with the init and destroy annotation types set to `jakarta.annotation.PostConstruct` and `jakarta.annotation.PreDestroy`, respectively.

Method Summary

Modifier and Type	Method and Description
protected Object	Returns: the resource object (never `null`) autowireResource(BeanFactory the factory to autowire against factory, CommonAnnotationBeanPostProcessor.LookupElement the descriptor for the annotated field/method element, String the name of the requesting bean requestingBeanName) Obtain a resource object for the given name and type through autowiring based on the given factory.
protected Object	Returns: the resource object (never `null`) buildLazyResourceProxy(CommonAnnotationBeanPostProcessor.LookupElement the descriptor for the annotated field/method element, String the name of the requesting bean requestingBeanName) Obtain a lazily resolving resource proxy for the given name and type, delegating to `getResource` on demand once a method call comes in.
private InjectionMetadata	buildResourceMetadata(Class<?> clazz)
private InjectionMetadata	findResourceMetadata(String beanName, Class<?> clazz, PropertyValues pvs)
private AutowireCandidateResolver	getAutowireCandidateResolver(RegisteredBean registeredBean)
private Collection<CommonAnnotationBeanPostProcessor.LookupElement>	getInjectedElements(InjectionMetadata metadata, PropertyValues propertyValues)
protected Object	Returns: the resource object (never `null`) getResource(CommonAnnotationBeanPostProcessor.LookupElement the descriptor for the annotated field/method element, String the name of the requesting bean requestingBeanName) Obtain the resource object for the given name and type.
public void	ignoreResourceType(String the resource type to ignore resourceType) Ignore the given resource type when resolving `@Resource` annotations.
private static Class<? extends Annotation>	loadAnnotationType(String name)
public boolean	postProcessAfterInstantiation(Object the bean instance created, with properties not having been set yet bean, String the name of the bean beanName) Overrides default org.springframework.beans.factory.config.InstantiationAwareBeanPostProcessor.postProcessAfterInstantiation. Perform operations after the bean has been instantiated, via a constructor or factory method, but before Spring property population (from explicit properties or autowiring) occurs.
public Object	postProcessBeforeInstantiation(Class<?> the class of the bean to be instantiated beanClass, String the name of the bean beanName) Overrides default org.springframework.beans.factory.config.InstantiationAwareBeanPostProcessor.postProcessBeforeInstantiation. Apply this BeanPostProcessor before the target bean gets instantiated.
public void	postProcessMergedBeanDefinition(RootBeanDefinition the merged bean definition for the bean beanDefinition, Class<?> the actual type of the managed bean instance beanType, String the name of the bean beanName) Overrides org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessMergedBeanDefinition. Implements org.springframework.beans.factory.support.MergedBeanDefinitionPostProcessor.postProcessMergedBeanDefinition. Post-process the given merged bean definition for the specified bean.
public PropertyValues	postProcessProperties(PropertyValues the property values that the factory is about to apply (never `null`) pvs, Object the bean instance created, but whose properties have not yet been set bean, String the name of the bean beanName) Overrides default org.springframework.beans.factory.config.InstantiationAwareBeanPostProcessor.postProcessProperties. Post-process the given property values before the factory applies them to the given bean.
public BeanRegistrationAotContribution	processAheadOfTime(RegisteredBean the registered bean to process registeredBean) Overrides org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.processAheadOfTime. Implements org.springframework.beans.factory.aot.BeanRegistrationAotProcessor.processAheadOfTime. Process the given `RegisteredBean` instance ahead-of-time and return a contribution or `null`.
public void	processInjection(Object the target instance to process bean) Native processing method for direct calls with an arbitrary target instance, resolving all of its fields and methods which are annotated with one of the supported 'resource' annotation types.
public void	resetBeanDefinition(String the name of the bean beanName) Overrides default org.springframework.beans.factory.support.MergedBeanDefinitionPostProcessor.resetBeanDefinition. A notification that the bean definition for the specified name has been reset, and that this post-processor should clear any metadata for the affected bean.
public void	setAlwaysUseJndiLookup(boolean alwaysUseJndiLookup) Set whether to always use JNDI lookups equivalent to standard Jakarta EE resource injection, even for `name` attributes and default names.
public void	setBeanFactory(BeanFactory owning BeanFactory (never `null`). The bean can immediately call methods on the factory. beanFactory) Implements org.springframework.beans.factory.BeanFactoryAware.setBeanFactory. Callback that supplies the owning factory to a bean instance.
public void	setFallbackToDefaultTypeMatch(boolean fallbackToDefaultTypeMatch) Set whether to allow a fallback to a type match if no explicit name has been specified.
public void	setJndiFactory(BeanFactory jndiFactory) Specify the factory for objects to be injected into `@Resource` / `@EJB` annotated fields and setter methods, for `mappedName` attributes that point directly into JNDI.
public void	setResourceFactory(BeanFactory resourceFactory) Specify the factory for objects to be injected into `@Resource` / `@EJB` annotated fields and setter methods, for `name` attributes and default names.

Inherited from org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor:: addDestroyAnnotationType addInitAnnotationType getOrder postProcessAfterInitialization postProcessBeforeDestruction postProcessBeforeInitialization requiresDestruction setDestroyAnnotationType setInitAnnotationType setOrder

public Class CommonAnnotationBeanPostProcessor

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