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AbstractRefreshableApplicationContext (Spring Framework) - Spring Framework 1.2.9 API 文档英文版

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org.springframework.context.support
Class AbstractRefreshableApplicationContext

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

All Implemented Interfaces:

BeanFactory, DisposableBean, HierarchicalBeanFactory, ListableBeanFactory, ApplicationContext, ApplicationEventPublisher, ConfigurableApplicationContext, MessageSource, ResourceLoader, ResourcePatternResolver

Direct Known Subclasses:

AbstractRefreshableWebApplicationContext, AbstractXmlApplicationContext

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public abstract class AbstractRefreshableApplicationContext
extends AbstractApplicationContext

Base class for ApplicationContext implementations that are supposed to support multiple refreshs, creating a new internal bean factory instance every time. Typically (but not necessarily), such a context will be driven by a set of config locations to load bean definitions from.

The only method to be implemented by subclasses is loadBeanDefinitions, which gets invoked on each refresh. A concrete implementation is supposed to load bean definitions into the given DefaultListableBeanFactory, typically delegating to one or more specific bean definition readers.

Note that there is a similar base class for WebApplicationContexts. AbstractRefreshableWebApplicationContext provides the same subclassing strategy, but additionally pre-implements all context functionality for web environments. There is also a pre-defined way to receive config locations for a web context.

Concrete standalone subclasses of this base class, reading in a specific bean definition format, are ClassPathXmlApplicationContext and FileSystemXmlApplicationContext, which both derive from the common AbstractXmlApplicationContext base class.

Since:

1.1.3

Author:

Juergen Hoeller

See Also:

loadBeanDefinitions(org.springframework.beans.factory.support.DefaultListableBeanFactory), DefaultListableBeanFactory, PropertiesBeanDefinitionReader, XmlBeanDefinitionReader, AbstractRefreshableWebApplicationContext, AbstractXmlApplicationContext, ClassPathXmlApplicationContext, FileSystemXmlApplicationContext

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Field Summary

 

Fields inherited from class org.springframework.context.support.AbstractApplicationContext
APPLICATION_EVENT_MULTICASTER_BEAN_NAME, logger, MESSAGE_SOURCE_BEAN_NAME

 

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

 

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, CLASSPATH_URL_PREFIX

 

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

 

Method Summary
protected  DefaultListableBeanFactory	createBeanFactory()           Create the bean factory for this context.
ConfigurableListableBeanFactory	getBeanFactory()           Subclasses must return their internal bean factory here.
protected abstract  void	loadBeanDefinitions(DefaultListableBeanFactory beanFactory)           Load bean definitions into the given bean factory, typically through delegating to one or more bean definition readers.
protected  void	refreshBeanFactory()           Subclasses must implement this method to perform the actual configuration load.

 

Methods inherited from class org.springframework.context.support.AbstractApplicationContext

addBeanFactoryPostProcessor, addListener, close, containsBean, containsBeanDefinition, containsLocalBean, destroy, getAliases, getBean, getBean, getBeanDefinitionCount, getBeanDefinitionNames, getBeanDefinitionNames, getBeanFactoryPostProcessors, getBeanNamesForType, getBeanNamesForType, getBeansOfType, getBeansOfType, getDisplayName, getInternalParentBeanFactory, getInternalParentMessageSource, getMessage, getMessage, getMessage, getParent, getParentBeanFactory, getResourcePatternResolver, getResources, getStartupDate, getType, isSingleton, onRefresh, postProcessBeanFactory, publishEvent, refresh, setDisplayName, setParent, toString

 

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
getResource

 

Constructor Detail

AbstractRefreshableApplicationContext

public AbstractRefreshableApplicationContext()

Create a new AbstractRefreshableApplicationContext with no parent.

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AbstractRefreshableApplicationContext

public AbstractRefreshableApplicationContext(ApplicationContext parent)

Create a new AbstractRefreshableApplicationContext with the given parent context.

Parameters:

parent - the parent context

Method Detail

refreshBeanFactory

protected final void refreshBeanFactory()
                                 throws BeansException

Description copied from class: AbstractApplicationContext

Subclasses must implement this method to perform the actual configuration load. The method is invoked by AbstractApplicationContext.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.

Specified by:

refreshBeanFactory in class AbstractApplicationContext

Throws:

BeansException - if initialization of the bean factory failed

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getBeanFactory

public final ConfigurableListableBeanFactory getBeanFactory()

Description copied from class: AbstractApplicationContext

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

Specified by:

getBeanFactory in class AbstractApplicationContext

Returns:

this application context's internal bean factory (never null)

See Also:

AbstractApplicationContext.refreshBeanFactory()

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createBeanFactory

protected DefaultListableBeanFactory createBeanFactory()

Create the bean factory for this context.

Default implementation creates a DefaultListableBeanFactory with the internal bean factory of this context's parent as parent bean factory.

Can be overridden in subclasses.

Returns:

the bean factory for this context

See Also:

DefaultListableBeanFactory, AbstractApplicationContext.getInternalParentBeanFactory()

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loadBeanDefinitions

protected abstract void loadBeanDefinitions(DefaultListableBeanFactory beanFactory)
                                     throws IOException,
                                            BeansException

Load bean definitions into the given bean factory, typically through delegating to one or more bean definition readers.

Parameters:

beanFactory - the bean factory to load bean definitions into

Throws:

IOException - if loading of bean definition files failed

BeansException - if parsing of the bean definitions failed

See Also:

PropertiesBeanDefinitionReader, XmlBeanDefinitionReader

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