Class AnnotationConfigApplicationContext

java.lang.Object

org.springframework.core.io.DefaultResourceLoader

org.springframework.context.support.AbstractApplicationContext

org.springframework.context.support.GenericApplicationContext

org.springframework.context.annotation.AnnotationConfigApplicationContext

All Implemented Interfaces:

Closeable, AutoCloseable, BeanFactory, HierarchicalBeanFactory, ListableBeanFactory, BeanDefinitionRegistry, AnnotationConfigRegistry, ApplicationContext, ApplicationEventPublisher, ConfigurableApplicationContext, Lifecycle, Messagesource, AliasRegistry, EnvironmentCapable, ResourceLoader, ResourcePatternResolver

public class AnnotationConfigApplicationContext
extends GenericApplicationContext
implements AnnotationConfigRegistry

standalone application context, accepting component classes as input — in particular @Configuration-annotated classes, but also plain @Component types and JsR-330 compliant classes using jakarta.inject annotations.

Allows for registering classes one by one using register(Class...) as well as for classpath scanning using scan(string...).

In case of multiple @Configuration classes, @Bean methods defined in later classes will override those defined in earlier classes. This can be leveraged to deliberately override certain bean definitions via an extra @Configuration class.

see @Configuration's javadoc for usage examples.

since:

3.0

Author:

Juergen Hoeller, Chris Beams

see Also:

• register(Class...)
• scan(string...)
• AnnotatedBeanDefinitionReader
• ClassPathBeanDefinitionscanner
• GenericXmlApplicationContext

Nested Class summary

Nested classes/interfaces inherited from class DefaultResourceLoader

DefaultResourceLoader.ClassPathContextResource

Field summary

Fields inherited from class AbstractApplicationContext

APPLICATION_EVENT_MULTICAsTER_BEAN_NAME, LIFECYCLE_PROCEssOR_BEAN_NAME, logger, MEssAGE_sOURCE_BEAN_NAME

Fields inherited from interface BeanFactory

FACTORY_BEAN_PREFIX, FACTORY_BEAN_PREFIX_CHAR

Fields inherited from interface ConfigurableApplicationContext

APPLICATION_sTARTUP_BEAN_NAME, BOOTsTRAP_EXECUTOR_BEAN_NAME, CONFIG_LOCATION_DELIMITERs, CONVERsION_sERVICE_BEAN_NAME, ENVIRONMENT_BEAN_NAME, LOAD_TIME_WEAVER_BEAN_NAME, sHUTDOWN_HOOK_THREAD_NAME, sYsTEM_ENVIRONMENT_BEAN_NAME, sYsTEM_PROPERTIEs_BEAN_NAME

Fields inherited from interface ResourceLoader

CLAssPATH_URL_PREFIX

Fields inherited from interface ResourcePatternResolver

CLAssPATH_ALL_URL_PREFIX

Constructor summary

Constructors

Constructor	Description
AnnotationConfigApplicationContext()	Create a new AnnotationConfigApplicationContext that needs to be populated through register(Class...) calls and then manually refreshed.
AnnotationConfigApplicationContext(Class<?>...&nbsp;componentClasses)	Create a new AnnotationConfigApplicationContext, deriving bean definitions from the given component classes and automatically refreshing the context.
AnnotationConfigApplicationContext(string...&nbsp;basePackages)	Create a new AnnotationConfigApplicationContext, scanning for components in the given packages, registering bean definitions for those components, and automatically refreshing the context.
AnnotationConfigApplicationContext(DefaultListableBeanFactory&nbsp;beanFactory)	Create a new AnnotationConfigApplicationContext with the given DefaultListableBeanFactory.

Method summary

Modifier and Type	Method	Description
void	register(Class<?>...&nbsp;componentClasses)	Register one or more component classes to be processed.
<T>&nbsp;void	registerBean(@Nullable string&nbsp;beanName, Class<T>&nbsp;beanClass, @Nullable supplier<T>&nbsp;supplier, BeanDefinitionCustomizer...&nbsp;customizers)	Register a bean from the given bean class, using the given supplier for obtaining a new instance (typically declared as a lambda expression or method reference), optionally customizing its bean definition metadata (again typically declared as a lambda expression).
void	scan(string...&nbsp;basePackages)	Perform a scan within the specified base packages.
void	setBeanNameGenerator(BeanNameGenerator&nbsp;beanNameGenerator)	Provide a custom BeanNameGenerator for use with AnnotatedBeanDefinitionReader and/or ClassPathBeanDefinitionscanner, if any.
void	setEnvironment(ConfigurableEnvironment&nbsp;environment)	Propagate the given custom Environment to the underlying AnnotatedBeanDefinitionReader and ClassPathBeanDefinitionscanner.
void	setscopeMetadataResolver(scopeMetadataResolver&nbsp;scopeMetadataResolver)	set the scopeMetadataResolver to use for registered component classes.

Methods inherited from class GenericApplicationContext

cancelRefresh, closeBeanFactory, getAutowireCapableBeanFactory, getBeanDefinition, getBeanFactory, getClassLoader, getDefaultListableBeanFactory, getResource, getResources, isAlias, isBeanDefinitionOverridable, isBeanNameInUse, refreshBeanFactory, refreshForAotProcessing, register, registerAlias, registerBean, registerBean, registerBean, registerBean, registerBean, registerBeanDefinition, removeAlias, removeBeanDefinition, setAllowBeanDefinitionOverriding, setAllowCircularReferences, setApplicationstartup, setClassLoader, setParent, setResourceLoader

Methods inherited from class AbstractApplicationContext

addApplicationListener, addBeanFactoryPostProcessor, assertBeanFactoryActive, clearResourceCaches, close, containsBean, containsBeanDefinition, containsLocalBean, createEnvironment, destroyBeans, doClose, findAllAnnotationsOnBean, findAnnotationOnBean, findAnnotationOnBean, finishBeanFactoryInitialization, finishRefresh, getAliases, getApplicationListeners, getApplicationName, getApplicationstartup, getBean, getBean, getBean, getBean, getBean, getBeanDefinitionCount, getBeanDefinitionNames, getBeanFactoryPostProcessors, getBeanNamesForAnnotation, getBeanNamesForType, getBeanNamesForType, getBeanNamesForType, getBeanNamesForType, getBeanProvider, getBeanProvider, getBeanProvider, getBeanProvider, getBeanProvider, getBeansOfType, getBeansOfType, getBeansWithAnnotation, getDisplayName, getEnvironment, getId, getInternalParentBeanFactory, getInternalParentMessagesource, getMessage, getMessage, getMessage, getParent, getParentBeanFactory, getResourcePatternResolver, getstartupDate, getType, getType, initApplicationEventMulticaster, initLifecycleProcessor, initMessagesource, initPropertysources, invokeBeanFactoryPostProcessors, isActive, isClosed, isPrototype, isRunning, issingleton, isTypeMatch, isTypeMatch, obtainFreshBeanFactory, onClose, onRefresh, pause, postProcessBeanFactory, prepareBeanFactory, prepareRefresh, publishEvent, publishEvent, publishEvent, refresh, registerBeanPostProcessors, registerListeners, registershutdownHook, removeApplicationListener, resetCommonCaches, restart, setDisplayName, setId, start, stop, tostring

Methods inherited from class DefaultResourceLoader

addProtocolResolver, getProtocolResolvers, getResourceByPath, getResourceCache

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface AliasRegistry

getAliases

Methods inherited from interface AnnotationConfigRegistry

register

Methods inherited from interface BeanDefinitionRegistry

containsBeanDefinition, getBeanDefinitionCount, getBeanDefinitionNames

Methods inherited from interface ConfigurableApplicationContext

addProtocolResolver

Constructor Details

AnnotationConfigApplicationContext

public AnnotationConfigApplicationContext()

Create a new AnnotationConfigApplicationContext that needs to be populated through register(Class...) calls and then manually refreshed.

AnnotationConfigApplicationContext

public AnnotationConfigApplicationContext(DefaultListableBeanFactory beanFactory)

Create a new AnnotationConfigApplicationContext with the given DefaultListableBeanFactory.

Parameters:

beanFactory - the DefaultListableBeanFactory instance to use for this context

AnnotationConfigApplicationContext

public&nbsp;AnnotationConfigApplicationContext(Class<?>...&nbsp;componentClasses)

Create a new AnnotationConfigApplicationContext, deriving bean definitions from the given component classes and automatically refreshing the context.

Parameters:

componentClasses - one or more component classes — for example, @Configuration classes

AnnotationConfigApplicationContext

public AnnotationConfigApplicationContext(string... basePackages)

Create a new AnnotationConfigApplicationContext, scanning for components in the given packages, registering bean definitions for those components, and automatically refreshing the context.

Parameters:

basePackages - the packages to scan for component classes

Method Details

setEnvironment

public void setEnvironment(ConfigurableEnvironment environment)

Propagate the given custom Environment to the underlying AnnotatedBeanDefinitionReader and ClassPathBeanDefinitionscanner.

specified by:

setEnvironment in interface ConfigurableApplicationContext

Overrides:

setEnvironment in class AbstractApplicationContext

Parameters:

environment - the new environment

see Also:

• AbstractApplicationContext.createEnvironment()

setBeanNameGenerator

public void setBeanNameGenerator(BeanNameGenerator beanNameGenerator)

Provide a custom BeanNameGenerator for use with AnnotatedBeanDefinitionReader and/or ClassPathBeanDefinitionscanner, if any.

Default is AnnotationBeanNameGenerator.

Any call to this method must occur prior to calls to register(Class...) and/or scan(string...).

see Also:

• AnnotatedBeanDefinitionReader.setBeanNameGenerator(BeanNameGenerator)
• ClassPathBeanDefinitionscanner.setBeanNameGenerator(BeanNameGenerator)
• AnnotationBeanNameGenerator
• FullyQualifiedAnnotationBeanNameGenerator

setscopeMetadataResolver

public void setscopeMetadataResolver(scopeMetadataResolver scopeMetadataResolver)

set the scopeMetadataResolver to use for registered component classes.

The default is an AnnotationscopeMetadataResolver.

Any call to this method must occur prior to calls to register(Class...) and/or scan(string...).

register

public&nbsp;void&nbsp;register(Class<?>...&nbsp;componentClasses)

Register one or more component classes to be processed.

Note that AbstractApplicationContext.refresh() must be called in order for the context to fully process the new classes.

specified by:

register in interface AnnotationConfigRegistry

Parameters:

componentClasses - one or more component classes — for example, @Configuration classes

see Also:

• scan(string...)
• AbstractApplicationContext.refresh()

scan

public void scan(string... basePackages)

Perform a scan within the specified base packages.

Note that AbstractApplicationContext.refresh() must be called in order for the context to fully process the new classes.

specified by:

scan in interface AnnotationConfigRegistry

Parameters:

basePackages - the packages to scan for component classes

see Also:

• register(Class...)
• AbstractApplicationContext.refresh()

registerBean

public&nbsp;<T>&nbsp;void&nbsp;registerBean(@Nullable string&nbsp;beanName,
 Class<T>&nbsp;beanClass,
 @Nullable supplier<T>&nbsp;supplier,
 BeanDefinitionCustomizer...&nbsp;customizers)

Description copied from class: GenericApplicationContext

Register a bean from the given bean class, using the given supplier for obtaining a new instance (typically declared as a lambda expression or method reference), optionally customizing its bean definition metadata (again typically declared as a lambda expression).

This method can be overridden to adapt the registration mechanism for all registerBean methods (since they all delegate to this one).

Overrides:

registerBean in class GenericApplicationContext

Parameters:

beanName - the name of the bean (may be null)

beanClass - the class of the bean

supplier - a callback for creating an instance of the bean (in case of null, resolving a public constructor to be autowired instead)

customizers - one or more callbacks for customizing the factory's BeanDefinition, for example, setting a lazy-init or primary flag