AbstractApplicationContext (Spring Framework API 2.1) - Spring Framework 2.1.0 API 文档英文版

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org.springframework.context.support
Class AbstractApplicationContext

java.lang.Object
  org.springframework.core.io.DefaultResourceLoader
      org.springframework.context.support.AbstractApplicationContext

All Implemented Interfaces:: BeanFactory, DisposableBean, HierarchicalBeanFactory, ListableBeanFactory, ApplicationContext, ApplicationEventPublisher, ConfigurableApplicationContext, Lifecycle, MessageSource, ResourceLoader, ResourcePatternResolver

Direct Known Subclasses:: AbstractRefreshableApplicationContext, GenericApplicationContext

public abstract class AbstractApplicationContext
extends DefaultResourceLoader
implements ConfigurableApplicationContext, DisposableBean
extends DefaultResourceLoader
implements ConfigurableApplicationContext, DisposableBean

Abstract implementation of the ApplicationContext interface. Doesn't mandate the type of storage used for configuration; simply implements common context functionality. Uses the Template Method design pattern, requiring concrete subclasses to implement abstract methods.

In contrast to a plain BeanFactory, an ApplicationContext is supposed to detect special beans defined in its internal bean factory: Therefore, this class automatically registers BeanFactoryPostProcessors, BeanPostProcessors and ApplicationListeners which are defined as beans in the context.

A MessageSource may also be supplied as a bean in the context, with the name "messageSource"; else, message resolution is delegated to the parent context. Furthermore, a multicaster for application events can be supplied as "applicationEventMulticaster" bean of type ApplicationEventMulticaster in the context; else, a default multicaster of type SimpleApplicationEventMulticaster will be used.

Implements resource loading through extending DefaultResourceLoader. Consequently treats non-URL resource paths as class path resources (supporting full class path resource names that include the package path, e.g. "mypackage/myresource.dat"), unless the DefaultResourceLoader.getResourceByPath(java.lang.String) method is overwritten in a subclass.

Since:: January 21, 2001
Author:: Rod Johnson, Juergen Hoeller
See Also:: refreshBeanFactory(), getBeanFactory(), BeanFactoryPostProcessor, BeanPostProcessor, ApplicationEventMulticaster, ApplicationListener, MessageSource

Field Summary

static String APPLICATION_EVENT_MULTICASTER_BEAN_NAME
          Name of the ApplicationEventMulticaster bean in the factory.

protected Log logger
          Logger used by this class.

static String MESSAGE_SOURCE_BEAN_NAME
          Name of the MessageSource bean in the factory.

Fields inherited from interface org.springframework.beans.factory.BeanFactory

FACTORY_BEAN_PREFIX

Fields inherited from interface org.springframework.core.io.support.ResourcePatternResolver

CLASSPATH_ALL_URL_PREFIX

Fields inherited from interface org.springframework.core.io.ResourceLoader

CLASSPATH_URL_PREFIX

Constructor Summary

AbstractApplicationContext()
          Create a new AbstractApplicationContext with no parent.

AbstractApplicationContext(ApplicationContext parent)
          Create a new AbstractApplicationContext with the given parent context.

Method Summary

void addApplicationListener(ApplicationListener listener)
          Add a new ApplicationListener that will be notified on context events such as context refresh and context shutdown.

void addBeanFactoryPostProcessor(BeanFactoryPostProcessor beanFactoryPostProcessor)
          Add a new BeanFactoryPostProcessor that will get applied to the internal bean factory of this application context on refresh, before any of the bean definitions get evaluated.

protected void addListener(ApplicationListener listener)
          Subclasses can invoke this method to register a listener.

void close()
          Close this application context, destroying all beans in its bean factory.

protected abstract void closeBeanFactory()
          Subclasses must implement this method to release their internal bean factory.

boolean containsBean(String name)
          Does this bean factory contain a bean with the given name?

boolean containsBeanDefinition(String name)
          Check if this bean factory contains a bean definition with the given name.

boolean containsLocalBean(String name)
          Return whether the local bean factory contains a bean of the given name, ignoring beans defined in ancestor contexts.

void destroy()
          DisposableBean callback for destruction of this instance.

protected void destroyBeans()
          Template method for destroying all beans that this context manages.

protected void doClose()
          Actually performs context closing: publishes a ContextClosedEvent and destroys the singletons in the bean factory of this application context.

String[] getAliases(String name)
          Return the aliases for the given bean name, if any.

List getApplicationListeners()
          Return the list of statically specified ApplicationListeners.

AutowireCapableBeanFactory getAutowireCapableBeanFactory()
          Return this context's internal bean factory as AutowireCapableBeanFactory, if already available.

Object getBean(String name)
          Return an instance, which may be shared or independent, of the specified bean.

Object getBean(String name, Class requiredType)
          Return an instance, which may be shared or independent, of the specified bean.

int getBeanDefinitionCount()
          Return the number of beans defined in the factory.

String[] getBeanDefinitionNames()
          Return the names of all beans defined in this factory.

abstract ConfigurableListableBeanFactory getBeanFactory()
          Subclasses must return their internal bean factory here.

List getBeanFactoryPostProcessors()
          Return the list of BeanFactoryPostProcessors that will get applied to the internal BeanFactory.

String[] getBeanNamesForType(Class type)
          Return the names of beans matching the given type (including subclasses), judging from either bean definitions or the value of getObjectType in the case of FactoryBeans.

String[] getBeanNamesForType(Class type, boolean includePrototypes, boolean allowEagerInit)
          Return the names of beans matching the given type (including subclasses), judging from either bean definitions or the value of getObjectType in the case of FactoryBeans.

Map getBeansOfType(Class type)
          Return the bean instances that match the given object type (including subclasses), judging from either bean definitions or the value of getObjectType in the case of FactoryBeans.

Map getBeansOfType(Class type, boolean includePrototypes, boolean allowEagerInit)
          Return the bean instances that match the given object type (including subclasses), judging from either bean definitions or the value of getObjectType in the case of FactoryBeans.

String getDisplayName()
          Return a friendly name for this context.

protected BeanFactory getInternalParentBeanFactory()
          Return the internal bean factory of the parent context if it implements ConfigurableApplicationContext; else, return the parent context itself.

protected MessageSource getInternalParentMessageSource()
          Return the internal message source of the parent context if it is an AbstractApplicationContext too; else, return the parent context itself.

protected Collection getLifecycleBeans()
          Return a Collection of all singleton beans that implement the Lifecycle interface in this context.

String getMessage(MessageSourceResolvable resolvable, Locale locale)
          Try to resolve the message using all the attributes contained within the MessageSourceResolvable argument that was passed in.

String getMessage(String code, Object[] args, Locale locale)
          Try to resolve the message.

String getMessage(String code, Object[] args, String defaultMessage, Locale locale)
          Try to resolve the message.

ApplicationContext getParent()
          Return the parent context, or null if there is no parent (that is, this context is the root of the context hierarchy).

BeanFactory getParentBeanFactory()
          Return the parent bean factory, or null if there is none.

protected ResourcePatternResolver getResourcePatternResolver()
          Return the ResourcePatternResolver to use for resolving location patterns into Resource instances.

Resource[] getResources(String locationPattern)
          Resolve the given location pattern into Resource objects.

long getStartupDate()
          Return the timestamp (ms) when this context was first loaded.

Class getType(String name)
          Determine the type of the bean with the given name.

protected void initApplicationEventMulticaster()
          Initialize the ApplicationEventMulticaster.

protected void initMessageSource()
          Initialize the MessageSource.

protected void invokeBeanFactoryPostProcessors(ConfigurableListableBeanFactory beanFactory)
          Instantiate and invoke all registered BeanFactoryPostProcessor beans, respecting explicit order if given.

boolean isActive()
          Determine whether this application context is active, that is, whether it has been refreshed at least once and has not been closed yet.

boolean isPrototype(String name)
          Is this bean a prototype?

boolean isRunning()
          Check whether this component is currently running.

boolean isSingleton(String name)
          Is this bean a shared singleton?

boolean isTypeMatch(String name, Class targetType)
          Check whether the bean with the given name matches the specified type.

protected ConfigurableListableBeanFactory obtainFreshBeanFactory()
          Tell the subclass to refresh the internal bean factory.

protected void onClose()
          Template method which can be overridden to add context-specific shutdown work.

protected void onRefresh()
          Template method which can be overridden to add context-specific refresh work.

protected void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory)
          Modify the application context's internal bean factory after its standard initialization.

protected void prepareBeanFactory(ConfigurableListableBeanFactory beanFactory)
          Configure the factory's standard context characteristics, such as the context's ClassLoader and post-processors.

protected void prepareRefresh()
          Prepare this context for refreshing, setting its startup date and active flag.

void publishEvent(ApplicationEvent event)
          Publish the given event to all listeners.

void refresh()
          Load or refresh the persistent representation of the configuration, which might an XML file, properties file, or relational database schema.

protected abstract void refreshBeanFactory()
          Subclasses must implement this method to perform the actual configuration load.

protected void registerBeanPostProcessors(ConfigurableListableBeanFactory beanFactory)
          Instantiate and invoke all registered BeanPostProcessor beans, respecting explicit order if given.

protected void registerListeners()
          Add beans that implement ApplicationListener as listeners.

void registerShutdownHook()
          Register a shutdown hook with the JVM runtime, closing this context on JVM shutdown unless it has already been closed at that time.

void setDisplayName(String displayName)
          Set a friendly name for this context.

void setParent(ApplicationContext parent)
          Set the parent of this application context.

void start()
          Start this component.

void stop()
          Stop this component.

String toString()
          Return information about this context.

Methods inherited from class org.springframework.core.io.DefaultResourceLoader

getClassLoader, getResource, getResourceByPath, setClassLoader

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.springframework.core.io.ResourceLoader

getClassLoader, getResource

Field Summary
`static String`	`APPLICATION_EVENT_MULTICASTER_BEAN_NAME` Name of the ApplicationEventMulticaster bean in the factory.
`protected Log`	`logger` Logger used by this class.
`static String`	`MESSAGE_SOURCE_BEAN_NAME` Name of the MessageSource bean in the factory.

Fields inherited from interface org.springframework.beans.factory.BeanFactory
`FACTORY_BEAN_PREFIX`

Fields inherited from interface org.springframework.core.io.support.ResourcePatternResolver
`CLASSPATH_ALL_URL_PREFIX`

Fields inherited from interface org.springframework.core.io.ResourceLoader
`CLASSPATH_URL_PREFIX`

Constructor Summary
`AbstractApplicationContext()` Create a new AbstractApplicationContext with no parent.
`AbstractApplicationContext(ApplicationContext parent)` Create a new AbstractApplicationContext with the given parent context.

Method Summary
`void`	`addApplicationListener(ApplicationListener listener)` Add a new ApplicationListener that will be notified on context events such as context refresh and context shutdown.
`void`	`addBeanFactoryPostProcessor(BeanFactoryPostProcessor beanFactoryPostProcessor)` Add a new BeanFactoryPostProcessor that will get applied to the internal bean factory of this application context on refresh, before any of the bean definitions get evaluated.
`protected void`	`addListener(ApplicationListener listener)` Subclasses can invoke this method to register a listener.
`void`	`close()` Close this application context, destroying all beans in its bean factory.
`protected abstract void`	`closeBeanFactory()` Subclasses must implement this method to release their internal bean factory.
`boolean`	`containsBean(String name)` Does this bean factory contain a bean with the given name?
`boolean`	`containsBeanDefinition(String name)` Check if this bean factory contains a bean definition with the given name.
`boolean`	`containsLocalBean(String name)` Return whether the local bean factory contains a bean of the given name, ignoring beans defined in ancestor contexts.
`void`	`destroy()` DisposableBean callback for destruction of this instance.
`protected void`	`destroyBeans()` Template method for destroying all beans that this context manages.
`protected void`	`doClose()` Actually performs context closing: publishes a ContextClosedEvent and destroys the singletons in the bean factory of this application context.
`String[]`	`getAliases(String name)` Return the aliases for the given bean name, if any.
`List`	`getApplicationListeners()` Return the list of statically specified ApplicationListeners.
`AutowireCapableBeanFactory`	`getAutowireCapableBeanFactory()` Return this context's internal bean factory as AutowireCapableBeanFactory, if already available.
`Object`	`getBean(String name)` Return an instance, which may be shared or independent, of the specified bean.
`Object`	`getBean(String name, Class requiredType)` Return an instance, which may be shared or independent, of the specified bean.
`int`	`getBeanDefinitionCount()` Return the number of beans defined in the factory.
`String[]`	`getBeanDefinitionNames()` Return the names of all beans defined in this factory.
`abstract ConfigurableListableBeanFactory`	`getBeanFactory()` Subclasses must return their internal bean factory here.
`List`	`getBeanFactoryPostProcessors()` Return the list of BeanFactoryPostProcessors that will get applied to the internal BeanFactory.
`String[]`	`getBeanNamesForType(Class type)` Return the names of beans matching the given type (including subclasses), judging from either bean definitions or the value of `getObjectType` in the case of FactoryBeans.
`String[]`	`getBeanNamesForType(Class type, boolean includePrototypes, boolean allowEagerInit)` Return the names of beans matching the given type (including subclasses), judging from either bean definitions or the value of `getObjectType` in the case of FactoryBeans.
`Map`	`getBeansOfType(Class type)` Return the bean instances that match the given object type (including subclasses), judging from either bean definitions or the value of `getObjectType` in the case of FactoryBeans.
`Map`	`getBeansOfType(Class type, boolean includePrototypes, boolean allowEagerInit)` Return the bean instances that match the given object type (including subclasses), judging from either bean definitions or the value of `getObjectType` in the case of FactoryBeans.
`String`	`getDisplayName()` Return a friendly name for this context.
`protected BeanFactory`	`getInternalParentBeanFactory()` Return the internal bean factory of the parent context if it implements ConfigurableApplicationContext; else, return the parent context itself.
`protected MessageSource`	`getInternalParentMessageSource()` Return the internal message source of the parent context if it is an AbstractApplicationContext too; else, return the parent context itself.
`protected Collection`	`getLifecycleBeans()` Return a Collection of all singleton beans that implement the Lifecycle interface in this context.
`String`	`getMessage(MessageSourceResolvable resolvable, Locale locale)` Try to resolve the message using all the attributes contained within the `MessageSourceResolvable` argument that was passed in.
`String`	`getMessage(String code, Object[] args, Locale locale)` Try to resolve the message.
`String`	`getMessage(String code, Object[] args, String defaultMessage, Locale locale)` Try to resolve the message.
`ApplicationContext`	`getParent()` Return the parent context, or `null` if there is no parent (that is, this context is the root of the context hierarchy).
`BeanFactory`	`getParentBeanFactory()` Return the parent bean factory, or `null` if there is none.
`protected ResourcePatternResolver`	`getResourcePatternResolver()` Return the ResourcePatternResolver to use for resolving location patterns into Resource instances.
`Resource[]`	`getResources(String locationPattern)` Resolve the given location pattern into Resource objects.
`long`	`getStartupDate()` Return the timestamp (ms) when this context was first loaded.
`Class`	`getType(String name)` Determine the type of the bean with the given name.
`protected void`	`initApplicationEventMulticaster()` Initialize the ApplicationEventMulticaster.
`protected void`	`initMessageSource()` Initialize the MessageSource.
`protected void`	`invokeBeanFactoryPostProcessors(ConfigurableListableBeanFactory beanFactory)` Instantiate and invoke all registered BeanFactoryPostProcessor beans, respecting explicit order if given.
`boolean`	`isActive()` Determine whether this application context is active, that is, whether it has been refreshed at least once and has not been closed yet.
`boolean`	`isPrototype(String name)` Is this bean a prototype?
`boolean`	`isRunning()` Check whether this component is currently running.
`boolean`	`isSingleton(String name)` Is this bean a shared singleton?
`boolean`	`isTypeMatch(String name, Class targetType)` Check whether the bean with the given name matches the specified type.
`protected ConfigurableListableBeanFactory`	`obtainFreshBeanFactory()` Tell the subclass to refresh the internal bean factory.
`protected void`	`onClose()` Template method which can be overridden to add context-specific shutdown work.
`protected void`	`onRefresh()` Template method which can be overridden to add context-specific refresh work.
`protected void`	`postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory)` Modify the application context's internal bean factory after its standard initialization.
`protected void`	`prepareBeanFactory(ConfigurableListableBeanFactory beanFactory)` Configure the factory's standard context characteristics, such as the context's ClassLoader and post-processors.
`protected void`	`prepareRefresh()` Prepare this context for refreshing, setting its startup date and active flag.
`void`	`publishEvent(ApplicationEvent event)` Publish the given event to all listeners.
`void`	`refresh()` Load or refresh the persistent representation of the configuration, which might an XML file, properties file, or relational database schema.
`protected abstract void`	`refreshBeanFactory()` Subclasses must implement this method to perform the actual configuration load.
`protected void`	`registerBeanPostProcessors(ConfigurableListableBeanFactory beanFactory)` Instantiate and invoke all registered BeanPostProcessor beans, respecting explicit order if given.
`protected void`	`registerListeners()` Add beans that implement ApplicationListener as listeners.
`void`	`registerShutdownHook()` Register a shutdown hook with the JVM runtime, closing this context on JVM shutdown unless it has already been closed at that time.
`void`	`setDisplayName(String displayName)` Set a friendly name for this context.
`void`	`setParent(ApplicationContext parent)` Set the parent of this application context.
`void`	`start()` Start this component.
`void`	`stop()` Stop this component.
`String`	`toString()` Return information about this context.

Methods inherited from class org.springframework.core.io.DefaultResourceLoader
`getClassLoader, getResource, getResourceByPath, setClassLoader`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

Methods inherited from interface org.springframework.core.io.ResourceLoader
`getClassLoader, getResource`

Field Detail

MESSAGE_SOURCE_BEAN_NAME

public static final String MESSAGE_SOURCE_BEAN_NAME

Name of the MessageSource bean in the factory. If none is supplied, message resolution is delegated to the parent.

See Also:: MessageSource, Constant Field Values

APPLICATION_EVENT_MULTICASTER_BEAN_NAME

public static final String APPLICATION_EVENT_MULTICASTER_BEAN_NAME

Name of the ApplicationEventMulticaster bean in the factory. If none is supplied, a default SimpleApplicationEventMulticaster is used.

See Also:: ApplicationEventMulticaster, SimpleApplicationEventMulticaster, Constant Field Values

logger

protected final Log logger

Logger used by this class. Available to subclasses.

Constructor Detail

AbstractApplicationContext

public AbstractApplicationContext()

Create a new AbstractApplicationContext with no parent.

AbstractApplicationContext

public AbstractApplicationContext(ApplicationContext parent)

Create a new AbstractApplicationContext with the given parent context.

Parameters:: parent - the parent context

Method Detail

getParent

public ApplicationContext getParent()

Return the parent context, or null if there is no parent (that is, this context is the root of the context hierarchy).

Specified by:: getParent in interface ApplicationContext

Returns:: the parent context, or null if there is no parent

getAutowireCapableBeanFactory

public AutowireCapableBeanFactory getAutowireCapableBeanFactory()
                                                         throws IllegalStateException

Return this context's internal bean factory as AutowireCapableBeanFactory, if already available.

Specified by:: getAutowireCapableBeanFactory in interface ApplicationContext

Returns:: the AutowireCapableBeanFactory for this context
Throws:: IllegalStateException - if the context does not support the AutowireCapableBeanFactory interface or does not hold an autowire-capable bean factory yet (usually if refresh() has never been called)
See Also:: getBeanFactory()

setDisplayName

public void setDisplayName(String displayName)

Set a friendly name for this context. Typically done during initialization of concrete context implementations.

getDisplayName

public String getDisplayName()

Return a friendly name for this context.

Specified by:: getDisplayName in interface ApplicationContext

Returns:: a display name for this context

getStartupDate

public long getStartupDate()

Return the timestamp (ms) when this context was first loaded.

Specified by:: getStartupDate in interface ApplicationContext

Returns:: the timestamp (ms) when this context was first loaded

publishEvent

public void publishEvent(ApplicationEvent event)

Publish the given event to all listeners.

Note: Listeners get initialized after the MessageSource, to be able to access it within listener implementations. Thus, MessageSource implementations cannot publish events.

Specified by:: publishEvent in interface ApplicationEventPublisher

Parameters:: event - the event to publish (may be application-specific or a standard framework event)
See Also:: RequestHandledEvent

getResourcePatternResolver

protected ResourcePatternResolver getResourcePatternResolver()

Return the ResourcePatternResolver to use for resolving location patterns into Resource instances. Default is a PathMatchingResourcePatternResolver, supporting Ant-style location patterns.

Can be overridden in subclasses, for extended resolution strategies, for example in a web environment.

Do not call this when needing to resolve a location pattern. Call the context's getResources method instead, which will delegate to the ResourcePatternResolver.

Returns:: the ResourcePatternResolver for this context
See Also:: getResources(java.lang.String), PathMatchingResourcePatternResolver

setParent

public void setParent(ApplicationContext parent)

Description copied from interface: ConfigurableApplicationContext

Set the parent of this application context.

Note that the parent shouldn't be changed: It should only be set outside a constructor if it isn't available when an object of this class is created, for example in case of WebApplicationContext setup.

Specified by:: setParent in interface ConfigurableApplicationContext

Parameters:: parent - the parent context
See Also:: ConfigurableWebApplicationContext

addBeanFactoryPostProcessor

public void addBeanFactoryPostProcessor(BeanFactoryPostProcessor beanFactoryPostProcessor)

Description copied from interface: ConfigurableApplicationContext

Add a new BeanFactoryPostProcessor that will get applied to the internal bean factory of this application context on refresh, before any of the bean definitions get evaluated. To be invoked during context configuration.

Specified by:: addBeanFactoryPostProcessor in interface ConfigurableApplicationContext

Parameters:: beanFactoryPostProcessor - the factory processor to register

getBeanFactoryPostProcessors

public List getBeanFactoryPostProcessors()

Return the list of BeanFactoryPostProcessors that will get applied to the internal BeanFactory.

See Also:: BeanFactoryPostProcessor

addApplicationListener

public void addApplicationListener(ApplicationListener listener)

Description copied from interface: ConfigurableApplicationContext

Add a new ApplicationListener that will be notified on context events such as context refresh and context shutdown.

Note that any ApplicationListener registered here will be applied on refresh of this context. If a listener is added after the initial refresh, it will be applied on next refresh of the context.

Specified by:: addApplicationListener in interface ConfigurableApplicationContext

Parameters:: listener - the ApplicationListener to register
See Also:: ContextRefreshedEvent, ContextClosedEvent

getApplicationListeners

public List getApplicationListeners()

Return the list of statically specified ApplicationListeners.

See Also:: ApplicationListener

refresh

public void refresh()
             throws BeansException,
                    IllegalStateException

Description copied from interface: ConfigurableApplicationContext

Load or refresh the persistent representation of the configuration, which might an XML file, properties file, or relational database schema.

As this is a startup method, it should destroy already created singletons if it fails, to avoid dangling resources. In other words, after invocation of that method, either all or no singletons at all should be instantiated.

Specified by:: refresh in interface ConfigurableApplicationContext

Throws:: BeansException - if the bean factory could not be initialized; IllegalStateException - if already initialized and multiple refresh attempts are not supported

prepareRefresh

protected void prepareRefresh()

Prepare this context for refreshing, setting its startup date and active flag.

obtainFreshBeanFactory

protected ConfigurableListableBeanFactory obtainFreshBeanFactory()

Tell the subclass to refresh the internal bean factory.

Returns:: the fresh BeanFactory instance
See Also:: refreshBeanFactory(), getBeanFactory()

prepareBeanFactory

protected void prepareBeanFactory(ConfigurableListableBeanFactory beanFactory)

Configure the factory's standard context characteristics, such as the context's ClassLoader and post-processors.

Parameters:: beanFactory - the BeanFactory to configure

postProcessBeanFactory

protected void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory)

Modify the application context's internal bean factory after its standard initialization. All bean definitions will have been loaded, but no beans will have been instantiated yet. This allows for registering special BeanPostProcessors etc in certain ApplicationContext implementations.

Parameters:: beanFactory - the bean factory used by the application context

invokeBeanFactoryPostProcessors

protected void invokeBeanFactoryPostProcessors(ConfigurableListableBeanFactory beanFactory)

Instantiate and invoke all registered BeanFactoryPostProcessor beans, respecting explicit order if given. Must be called before singleton instantiation.

registerBeanPostProcessors

protected void registerBeanPostProcessors(ConfigurableListableBeanFactory beanFactory)

Instantiate and invoke all registered BeanPostProcessor beans, respecting explicit order if given.

Must be called before any instantiation of application beans.

initMessageSource

protected void initMessageSource()

Initialize the MessageSource. Use parent's if none defined in this context.

initApplicationEventMulticaster

protected void initApplicationEventMulticaster()

Initialize the ApplicationEventMulticaster. Uses SimpleApplicationEventMulticaster if none defined in the context.

See Also:: SimpleApplicationEventMulticaster

onRefresh

protected void onRefresh()
                  throws BeansException

Template method which can be overridden to add context-specific refresh work. Called on initialization of special beans, before instantiation of singletons.

This implementation is empty.

Throws:: BeansException - in case of errors
See Also:: refresh()

registerListeners

protected void registerListeners()

Add beans that implement ApplicationListener as listeners. Doesn't affect other listeners, which can be added without being beans.

addListener

protected void addListener(ApplicationListener listener)

Subclasses can invoke this method to register a listener. Any beans in the context that are listeners are automatically added.

Parameters:: listener - the listener to register

registerShutdownHook

public void registerShutdownHook()

Register a shutdown hook with the JVM runtime, closing this context on JVM shutdown unless it has already been closed at that time.

Delegates to doClose() for the actual closing procedure.

Specified by:: registerShutdownHook in interface ConfigurableApplicationContext

See Also:: Runtime.addShutdownHook(java.lang.Thread), close(), doClose()

destroy

public void destroy()

DisposableBean callback for destruction of this instance. Only called when the ApplicationContext itself is running as a bean in another BeanFactory or ApplicationContext, which is rather unusual.

The close method is the native way to shut down an ApplicationContext.

Specified by:: destroy in interface DisposableBean

See Also:: close(), SingletonBeanFactoryLocator

close

public void close()

Close this application context, destroying all beans in its bean factory.

Delegates to doClose() for the actual closing procedure. Also removes a JVM shutdown hook, if registered, as it's not needed anymore.

Specified by:: close in interface ConfigurableApplicationContext

See Also:: doClose(), registerShutdownHook()

doClose

protected void doClose()

Actually performs context closing: publishes a ContextClosedEvent and destroys the singletons in the bean factory of this application context.

Called by both close() and a JVM shutdown hook, if any.

See Also:: ContextClosedEvent, ConfigurableBeanFactory.destroySingletons(), close(), registerShutdownHook()

destroyBeans

protected void destroyBeans()

Template method for destroying all beans that this context manages. The default implementation destroy all cached singletons in this context, invoking DisposableBean.destroy() and/or the specified "destroy-method".

Can be overridden to add context-specific bean destruction steps right before or right after standard singleton destruction, while the context's BeanFactory is still active.

See Also:: getBeanFactory(), ConfigurableBeanFactory.destroySingletons()

onClose

protected void onClose()

Template method which can be overridden to add context-specific shutdown work. The default implementation is empty.

Called at the end of doClose()'s shutdown procedure, after this context's BeanFactory has been closed. If custom shutdown logic needs to execute while the BeanFactory is still active, override the destroyBeans() method instead.

isActive

public boolean isActive()

Description copied from interface: ConfigurableApplicationContext

Determine whether this application context is active, that is, whether it has been refreshed at least once and has not been closed yet.

Specified by:: isActive in interface ConfigurableApplicationContext

Returns:: whether the context is still active
See Also:: ConfigurableApplicationContext.refresh(), ConfigurableApplicationContext.close(), ConfigurableApplicationContext.getBeanFactory()

getBean

public Object getBean(String name)
               throws BeansException

Description copied from interface: BeanFactory

Return an instance, which may be shared or independent, of the specified bean.

This method allows a Spring BeanFactory to be used as a replacement for the Singleton or Prototype design pattern. Callers may retain references to returned objects in the case of Singleton beans.

Translates aliases back to the corresponding canonical bean name. Will ask the parent factory if the bean cannot be found in this factory instance.

Specified by:: getBean in interface BeanFactory

Parameters:: name - the name of the bean to retrieve
Returns:: an instance of the bean
Throws:: NoSuchBeanDefinitionException - if there is no bean definition with the specified name; BeansException - if the bean could not be obtained

getBean

public Object getBean(String name,
                      Class requiredType)
               throws BeansException

Description copied from interface: BeanFactory

Return an instance, which may be shared or independent, of the specified bean.

Behaves the same as BeanFactory.getBean(String), but provides a measure of type safety by throwing a BeanNotOfRequiredTypeException if the bean is not of the required type. This means that ClassCastException can't be thrown on casting the result correctly, as can happen with BeanFactory.getBean(String).

Translates aliases back to the corresponding canonical bean name. Will ask the parent factory if the bean cannot be found in this factory instance.

Specified by:: getBean in interface BeanFactory

Parameters:: name - the name of the bean to retrieve; requiredType - type the bean must match. Can be an interface or superclass of the actual class, or null for any match. For example, if the value is Object.class, this method will succeed whatever the class of the returned instance.
Returns:: an instance of the bean
Throws:: BeanNotOfRequiredTypeException - if the bean is not of the required type; NoSuchBeanDefinitionException - if there's no such bean definition; BeansException - if the bean could not be created

containsBean

public boolean containsBean(String name)

Description copied from interface: BeanFactory

Does this bean factory contain a bean with the given name? More specifically, is BeanFactory.getBean(java.lang.String) able to obtain a bean instance for the given name?

Translates aliases back to the corresponding canonical bean name. Will ask the parent factory if the bean cannot be found in this factory instance.

Specified by:: containsBean in interface BeanFactory

Parameters:: name - the name of the bean to query
Returns:: whether a bean with the given name is defined

isSingleton

public boolean isSingleton(String name)
                    throws NoSuchBeanDefinitionException

Description copied from interface: BeanFactory

Is this bean a shared singleton? That is, will BeanFactory.getBean(java.lang.String) always return the same instance?

Note: This method returning false does not clearly indicate independent instances. It indicates non-singleton instances, which may correspond to a scoped bean as well. Use the BeanFactory.isPrototype(java.lang.String) operation to explicitly check for independent instances.

Translates aliases back to the corresponding canonical bean name. Will ask the parent factory if the bean cannot be found in this factory instance.

Specified by:: isSingleton in interface BeanFactory

Parameters:: name - the name of the bean to query
Returns:: whether this bean corresponds to a singleton instance
Throws:: NoSuchBeanDefinitionException - if there is no bean with the given name
See Also:: BeanFactory.getBean(java.lang.String), BeanFactory.isPrototype(java.lang.String)

isPrototype

public boolean isPrototype(String name)
                    throws NoSuchBeanDefinitionException

Description copied from interface: BeanFactory

Is this bean a prototype? That is, will BeanFactory.getBean(java.lang.String) always return independent instances?

Note: This method returning false does not clearly indicate a singleton object. It indicates non-independent instances, which may correspond to a scoped bean as well. Use the BeanFactory.isSingleton(java.lang.String) operation to explicitly check for a shared singleton instance.

Translates aliases back to the corresponding canonical bean name. Will ask the parent factory if the bean cannot be found in this factory instance.

Specified by:: isPrototype in interface BeanFactory

Parameters:: name - the name of the bean to query
Returns:: whether this bean will always deliver independent instances
Throws:: NoSuchBeanDefinitionException - if there is no bean with the given name
See Also:: BeanFactory.getBean(java.lang.String), BeanFactory.isSingleton(java.lang.String)

isTypeMatch

public boolean isTypeMatch(String name,
                           Class targetType)
                    throws NoSuchBeanDefinitionException

Description copied from interface: BeanFactory

Check whether the bean with the given name matches the specified type. More specifically, check whether a BeanFactory.getBean(java.lang.String) call for the given name would return an object that is assignable to the specified target type.

Translates aliases back to the corresponding canonical bean name. Will ask the parent factory if the bean cannot be found in this factory instance.

Specified by:: isTypeMatch in interface BeanFactory

Parameters:: name - the name of the bean to query; targetType - the type to match against
Returns:: true if the bean type matches, false if it doesn't match or cannot be determined yet
Throws:: NoSuchBeanDefinitionException - if there is no bean with the given name
See Also:: BeanFactory.getBean(java.lang.String), BeanFactory.getType(java.lang.String)

getType

public Class getType(String name)
              throws NoSuchBeanDefinitionException

Description copied from interface: BeanFactory

Determine the type of the bean with the given name. More specifically, determine the type of object that BeanFactory.getBean(java.lang.String) would return for the given name.

For a FactoryBean, return the type of object that the FactoryBean creates, as exposed by FactoryBean.getObjectType().

Translates aliases back to the corresponding canonical bean name. Will ask the parent factory if the bean cannot be found in this factory instance.

Specified by:: getType in interface BeanFactory

Parameters:: name - the name of the bean to query
Returns:: the type of the bean, or null if not determinable
Throws:: NoSuchBeanDefinitionException - if there is no bean with the given name
See Also:: BeanFactory.getBean(java.lang.String), BeanFactory.isTypeMatch(java.lang.String, java.lang.Class)

getAliases

public String[] getAliases(String name)

Description copied from interface: BeanFactory

Return the aliases for the given bean name, if any. All of those aliases point to the same bean when used in a BeanFactory.getBean(java.lang.String) call.

If the given name is an alias, the corresponding original bean name and other aliases (if any) will be returned, with the original bean name being the first element in the array.

Will ask the parent factory if the bean cannot be found in this factory instance.

Specified by:: getAliases in interface BeanFactory

Parameters:: name - the bean name to check for aliases
Returns:: the aliases, or an empty array if none
See Also:: BeanFactory.getBean(java.lang.String)

containsBeanDefinition

public boolean containsBeanDefinition(String name)

Description copied from interface: ListableBeanFactory

Check if this bean factory contains a bean definition with the given name.

Does not consider any hierarchy this factory may participate in, and ignores any singleton beans that have been registered by other means than bean definitions.

Specified by:: containsBeanDefinition in interface ListableBeanFactory

Parameters:: name - the name of the bean to look for
Returns:: if this bean factory contains a bean definition with the given name
See Also:: BeanFactory.containsBean(java.lang.String)

getBeanDefinitionCount

public int getBeanDefinitionCount()

Description copied from interface: ListableBeanFactory

Return the number of beans defined in the factory.

Does not consider any hierarchy this factory may participate in, and ignores any singleton beans that have been registered by other means than bean definitions.

Specified by:: getBeanDefinitionCount in interface ListableBeanFactory

Returns:: the number of beans defined in the factory

getBeanDefinitionNames

public String[] getBeanDefinitionNames()

Description copied from interface: ListableBeanFactory

Return the names of all beans defined in this factory.

Does not consider any hierarchy this factory may participate in, and ignores any singleton beans that have been registered by other means than bean definitions.

Specified by:: getBeanDefinitionNames in interface ListableBeanFactory

Returns:: the names of all beans defined in this factory, or an empty array if none defined

getBeanNamesForType

public String[] getBeanNamesForType(Class type)

Description copied from interface: ListableBeanFactory

Return the names of beans matching the given type (including subclasses), judging from either bean definitions or the value of getObjectType in the case of FactoryBeans.

Does consider objects created by FactoryBeans, which means that FactoryBeans will get initialized. If the object created by the FactoryBean doesn't match, the raw FactoryBean itself will be matched against the type.

Does not consider any hierarchy this factory may participate in. Use BeanFactoryUtils' beanNamesForTypeIncludingAncestors to include beans in ancestor factories too.

Note: Does not ignore singleton beans that have been registered by other means than bean definitions.

This version of getBeanNamesForType matches all kinds of beans, be it singletons, prototypes, or FactoryBeans. In most implementations, the result will be the same as for getBeanNamesOfType(type, true, true).

Bean names returned by this method should always return bean names in the order of definition in the backend configuration, as far as possible.

Specified by:: getBeanNamesForType in interface ListableBeanFactory

Parameters:: type - the class or interface to match, or null for all bean names
Returns:: the names of beans (or objects created by FactoryBeans) matching the given object type (including subclasses), or an empty array if none
See Also:: FactoryBean.getObjectType(), BeanFactoryUtils.beanNamesForTypeIncludingAncestors(ListableBeanFactory, Class)

getBeanNamesForType

public String[] getBeanNamesForType(Class type,
                                    boolean includePrototypes,
                                    boolean allowEagerInit)

Description copied from interface: ListableBeanFactory

Return the names of beans matching the given type (including subclasses), judging from either bean definitions or the value of getObjectType in the case of FactoryBeans.

Does consider objects created by FactoryBeans if the "allowEagerInit" flag is set, which means that FactoryBeans will get initialized. If the object created by the FactoryBean doesn't match, the raw FactoryBean itself will be matched against the type. If "allowEagerInit" is not set, only raw FactoryBeans will be checked (which doesn't require initialization of each FactoryBean). $ *

Does not consider any hierarchy this factory may participate in. Use BeanFactoryUtils' beanNamesForTypeIncludingAncestors to include beans in ancestor factories too.

Note: Does not ignore singleton beans that have been registered by other means than bean definitions.

Bean names returned by this method should always return bean names in the order of definition in the backend configuration, as far as possible.

Specified by:: getBeanNamesForType in interface ListableBeanFactory

Parameters:: type - the class or interface to match, or null for all bean names; includePrototypes - whether to include prototype beans too or just singletons (also applies to FactoryBeans); allowEagerInit - whether to initialize lazy-init singletons and objects created by FactoryBeans (or by factory methods with a "factory-bean" reference) for the type check. Note that FactoryBeans need to be eagerly initialized to determine their type: So be aware that passing in "true" for this flag will initialize FactoryBeans and "factory-bean" references.
Returns:: the names of beans (or objects created by FactoryBeans) matching the given object type (including subclasses), or an empty array if none
See Also:: FactoryBean.getObjectType(), BeanFactoryUtils.beanNamesForTypeIncludingAncestors(ListableBeanFactory, Class, boolean, boolean)

getBeansOfType

public Map getBeansOfType(Class type)
                   throws BeansException

Description copied from interface: ListableBeanFactory

Return the bean instances that match the given object type (including subclasses), judging from either bean definitions or the value of getObjectType in the case of FactoryBeans.

Does not consider any hierarchy this factory may participate in. Use BeanFactoryUtils' beansOfTypeIncludingAncestors to include beans in ancestor factories too.

Note: Does not ignore singleton beans that have been registered by other means than bean definitions.

This version of getBeansOfType matches all kinds of beans, be it singletons, prototypes, or FactoryBeans. In most implementations, the result will be the same as for getBeansOfType(type, true, true).

The Map returned by this method should always return bean names and corresponding bean instances in the order of definition in the backend configuration, as far as possible. This will usually mean that either JDK 1.4 or Commons Collections needs to be available.

Specified by:: getBeansOfType in interface ListableBeanFactory

Parameters:: type - the class or interface to match, or null for all concrete beans
Returns:: a Map with the matching beans, containing the bean names as keys and the corresponding bean instances as values
Throws:: BeansException - if a bean could not be created
See Also:: FactoryBean.getObjectType(), BeanFactoryUtils.beansOfTypeIncludingAncestors(ListableBeanFactory, Class)

getBeansOfType

public Map getBeansOfType(Class type,
                          boolean includePrototypes,
                          boolean allowEagerInit)
                   throws BeansException

Description copied from interface: ListableBeanFactory

Return the bean instances that match the given object type (including subclasses), judging from either bean definitions or the value of getObjectType in the case of FactoryBeans.

Does not consider any hierarchy this factory may participate in. Use BeanFactoryUtils' beansOfTypeIncludingAncestors to include beans in ancestor factories too.

Note: Does not ignore singleton beans that have been registered by other means than bean definitions.

Specified by:: getBeansOfType in interface ListableBeanFactory

Parameters:: type - the class or interface to match, or null for all concrete beans; includePrototypes - whether to include prototype beans too or just singletons (also applies to FactoryBeans); allowEagerInit - whether to initialize lazy-init singletons and objects created by FactoryBeans (or by factory methods with a "factory-bean" reference) for the type check. Note that FactoryBeans need to be eagerly initialized to determine their type: So be aware that passing in "true" for this flag will initialize FactoryBeans and "factory-bean" references.
Returns:: a Map with the matching beans, containing the bean names as keys and the corresponding bean instances as values
Throws:: BeansException - if a bean could not be created
See Also:: FactoryBean.getObjectType(), BeanFactoryUtils.beansOfTypeIncludingAncestors(ListableBeanFactory, Class, boolean, boolean)

getParentBeanFactory

public BeanFactory getParentBeanFactory()

Description copied from interface: HierarchicalBeanFactory

Return the parent bean factory, or null if there is none.

Specified by:: getParentBeanFactory in interface HierarchicalBeanFactory

containsLocalBean

public boolean containsLocalBean(String name)

Description copied from interface: HierarchicalBeanFactory

Return whether the local bean factory contains a bean of the given name, ignoring beans defined in ancestor contexts.

This is an alternative to containsBean, ignoring a bean of the given name from an ancestor bean factory.

Specified by:: containsLocalBean in interface HierarchicalBeanFactory

Parameters:: name - the name of the bean to query
Returns:: whether a bean with the given name is defined in the local factory
See Also:: BeanFactory.containsBean(java.lang.String)

getInternalParentBeanFactory

protected BeanFactory getInternalParentBeanFactory()

Return the internal bean factory of the parent context if it implements ConfigurableApplicationContext; else, return the parent context itself.

See Also:: ConfigurableApplicationContext.getBeanFactory()

getMessage

public String getMessage(String code,
                         Object[] args,
                         String defaultMessage,
                         Locale locale)

Description copied from interface: MessageSource

Try to resolve the message. Return default message if no message was found.

Specified by:: getMessage in interface MessageSource

Parameters:: code - the code to lookup up, such as 'calculator.noRateSet'. Users of this class are encouraged to base message names on the relevant fully qualified class name, thus avoiding conflict and ensuring maximum clarity.; args - array of arguments that will be filled in for params within the message (params look like "{0}", "{1,date}", "{2,time}" within a message), or null if none.; defaultMessage - String to return if the lookup fails; locale - the Locale in which to do the lookup
Returns:: the resolved message if the lookup was successful; otherwise the default message passed as a parameter
See Also:: MessageFormat

getMessage

public String getMessage(String code,
                         Object[] args,
                         Locale locale)
                  throws NoSuchMessageException

Description copied from interface: MessageSource

Try to resolve the message. Treat as an error if the message can't be found.

Specified by:: getMessage in interface MessageSource

Parameters:: code - the code to lookup up, such as 'calculator.noRateSet'; args - Array of arguments that will be filled in for params within the message (params look like "{0}", "{1,date}", "{2,time}" within a message), or null if none.; locale - the Locale in which to do the lookup
Returns:: the resolved message
Throws:: NoSuchMessageException - if the message wasn't found
See Also:: MessageFormat

getMessage

public String getMessage(MessageSourceResolvable resolvable,
                         Locale locale)
                  throws NoSuchMessageException

Description copied from interface: MessageSource

Try to resolve the message using all the attributes contained within the MessageSourceResolvable argument that was passed in.

NOTE: We must throw a NoSuchMessageException on this method since at the time of calling this method we aren't able to determine if the defaultMessage property of the resolvable is null or not.

Specified by:: getMessage in interface MessageSource

Parameters:: resolvable - value object storing attributes required to properly resolve a message; locale - the Locale in which to do the lookup
Returns:: the resolved message
Throws:: NoSuchMessageException - if the message wasn't found
See Also:: MessageFormat

getInternalParentMessageSource

protected MessageSource getInternalParentMessageSource()

Return the internal message source of the parent context if it is an AbstractApplicationContext too; else, return the parent context itself.

getResources

public Resource[] getResources(String locationPattern)
                        throws IOException

Description copied from interface: ResourcePatternResolver

Resolve the given location pattern into Resource objects.

Overlapping resource entries that point to the same physical resource should be avoided, as far as possible. The result should have set semantics.

Specified by:: getResources in interface ResourcePatternResolver

Parameters:: locationPattern - the location pattern to resolve
Returns:: the corresponding Resource objects
Throws:: IOException - in case of I/O errors

start

public void start()

Description copied from interface: Lifecycle

Start this component. Should not throw an exception if the component is already running.

In the case of a container, this will propagate the start signal to all components that apply.

Specified by:: start in interface Lifecycle

stop

public void stop()

Description copied from interface: Lifecycle

Stop this component. Should not throw an exception if the component isn't started yet.

In the case of a container, this will propagate the stop signal to all components that apply.

Specified by:: stop in interface Lifecycle

isRunning

public boolean isRunning()

Description copied from interface: Lifecycle

Check whether this component is currently running.

In the case of a container, this will return true only if all components that apply are currently running.

Specified by:: isRunning in interface Lifecycle

Returns:: whether the component is currently running

getLifecycleBeans

protected Collection getLifecycleBeans()

Return a Collection of all singleton beans that implement the Lifecycle interface in this context.

Returns:: Collection of Lifecycle beans

refreshBeanFactory

protected abstract void refreshBeanFactory()
                                    throws BeansException,
                                           IllegalStateException

Subclasses must implement this method to perform the actual configuration load. The method is invoked by refresh() before any other initialization work.

A subclass will either create a new bean factory and hold a reference to it, or return a single BeanFactory instance that it holds. In the latter case, it will usually throw an IllegalStateException if refreshing the context more than once.

Throws:: BeansException - if initialization of the bean factory failed; IllegalStateException - if already initialized and multiple refresh attempts are not supported

closeBeanFactory

protected abstract void closeBeanFactory()

Subclasses must implement this method to release their internal bean factory. This method gets invoked by close() after all other shutdown work.

Should never throw an exception but rather log shutdown failures.

getBeanFactory

public abstract ConfigurableListableBeanFactory getBeanFactory()
                                                        throws IllegalStateException

Subclasses must return their internal bean factory here. They should implement the lookup efficiently, so that it can be called repeatedly without a performance penalty.

Note: Subclasses should check whether the context is still active before returning the internal bean factory. The internal factory should generally be considered unavailable once the context has been closed.

Specified by:: getBeanFactory in interface ConfigurableApplicationContext

Returns:: this application context's internal bean factory (never null)
Throws:: IllegalStateException - if the context does not hold an internal bean factory yet (usually if refresh() has never been called) or if the context has been closed already
See Also:: refreshBeanFactory(), closeBeanFactory()

toString

public String toString()

Return information about this context.

Overrides:: toString in class Object

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AbstractApplicationContext (Spring Framework API 2.1) - Spring Framework 2.1.0 API 文档英文版

org.springframework.context.support Class AbstractApplicationContext

MESSAGE_SOURCE_BEAN_NAME

APPLICATION_EVENT_MULTICASTER_BEAN_NAME

logger

AbstractApplicationContext

AbstractApplicationContext

getParent

getAutowireCapableBeanFactory

setDisplayName

getDisplayName

getStartupDate

publishEvent

getResourcePatternResolver

setParent

addBeanFactoryPostProcessor

getBeanFactoryPostProcessors

addApplicationListener

getApplicationListeners

refresh

prepareRefresh

obtainFreshBeanFactory

prepareBeanFactory

postProcessBeanFactory

invokeBeanFactoryPostProcessors

registerBeanPostProcessors

initMessageSource

initApplicationEventMulticaster

onRefresh

registerListeners

addListener

registerShutdownHook

destroy

close

doClose

destroyBeans

onClose

isActive

getBean

getBean

containsBean

isSingleton

isPrototype

isTypeMatch

getType

getAliases

containsBeanDefinition

getBeanDefinitionCount

getBeanDefinitionNames

getBeanNamesForType

getBeanNamesForType

getBeansOfType

getBeansOfType

getParentBeanFactory

containsLocalBean

getInternalParentBeanFactory

getMessage

getMessage

getMessage

getInternalParentMessageSource

getResources

start

stop

isRunning

getLifecycleBeans

refreshBeanFactory

closeBeanFactory

getBeanFactory

toString

org.springframework.context.support
Class AbstractApplicationContext