Package 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:

Closeable, AutoCloseable, BeanFactory, HierarchicalBeanFactory, ListableBeanFactory, ApplicationContext, ApplicationEventPublisher, ConfigurableApplicationContext, Lifecycle, MessageSource, EnvironmentCapable, ResourceLoader, ResourcePatternResolver

Direct Known Subclasses:

AbstractRefreshableConfigApplicationContext

public abstract class AbstractRefreshableApplicationContext
extends AbstractApplicationContext

Base class for ApplicationContext implementations which are supposed to support multiple calls to AbstractApplicationContext.refresh(), 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(org.springframework.beans.factory.support.DefaultListableBeanFactory), 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; AnnotationConfigApplicationContext supports @Configuration-annotated classes as a source of bean definitions.

Since:

1.1.3

Author:

Juergen Hoeller, Chris Beams

See Also:

• loadBeanDefinitions(org.springframework.beans.factory.support.DefaultListableBeanFactory)
• DefaultListableBeanFactory
• AbstractRefreshableWebApplicationContext
• AbstractXmlApplicationContext
• ClassPathXmlApplicationContext
• FileSystemXmlApplicationContext
• AnnotationConfigApplicationContext

Nested Class Summary

Nested classes/interfaces inherited from class org.springframework.core.io.DefaultResourceLoader

DefaultResourceLoader.ClassPathContextResource

Field Summary

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

APPLICATION_EVENT_MULTICASTER_BEAN_NAME, LIFECYCLE_PROCESSOR_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.context.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 org.springframework.core.io.ResourceLoader

CLASSPATH_URL_PREFIX

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

CLASSPATH_ALL_URL_PREFIX

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method	Description
protected void	assertBeanFactoryActive()	Overridden to turn it into a no-op: With AbstractRefreshableApplicationContext, getBeanFactory() serves a strong assertion for an active context anyway.
protected void	cancelRefresh(Throwable ex)	Cancel this context's refresh attempt, resetting the active flag after an exception got thrown.
protected final void	closeBeanFactory()	Subclasses must implement this method to release their internal bean factory.
protected DefaultListableBeanFactory	createBeanFactory()	Create an internal bean factory for this context.
protected void	customizeBeanFactory(DefaultListableBeanFactory beanFactory)	Customize the internal bean factory used by this context.
final ConfigurableListableBeanFactory	getBeanFactory()	Subclasses must return their internal bean factory here.
protected final boolean	hasBeanFactory()	Determine whether this context currently holds a bean factory, i.e.
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 final void	refreshBeanFactory()	This implementation performs an actual refresh of this context's underlying bean factory, shutting down the previous bean factory (if any) and initializing a fresh bean factory for the next phase of the context's lifecycle.
void	setAllowBeanDefinitionOverriding(boolean allowBeanDefinitionOverriding)	Set whether it should be allowed to override bean definitions by registering a different definition with the same name, automatically replacing the former.
void	setAllowCircularReferences(boolean allowCircularReferences)	Set whether to allow circular references between beans - and automatically try to resolve them.

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

addApplicationListener, addBeanFactoryPostProcessor, clearResourceCaches, close, containsBean, containsBeanDefinition, containsLocalBean, createEnvironment, destroyBeans, doClose, findAllAnnotationsOnBean, findAnnotationOnBean, findAnnotationOnBean, finishBeanFactoryInitialization, finishRefresh, getAliases, getApplicationListeners, getApplicationName, getApplicationStartup, getAutowireCapableBeanFactory, getBean, getBean, getBean, getBean, getBean, getBeanDefinitionCount, getBeanDefinitionNames, getBeanFactoryPostProcessors, getBeanNamesForAnnotation, getBeanNamesForType, getBeanNamesForType, getBeanNamesForType, getBeanNamesForType, getBeanProvider, getBeanProvider, getBeanProvider, getBeanProvider, getBeansOfType, getBeansOfType, getBeansWithAnnotation, getDisplayName, getEnvironment, getId, getInternalParentBeanFactory, getInternalParentMessageSource, getMessage, getMessage, getMessage, getParent, getParentBeanFactory, getResourcePatternResolver, getResources, getStartupDate, getType, getType, initApplicationEventMulticaster, initLifecycleProcessor, initMessageSource, initPropertySources, invokeBeanFactoryPostProcessors, isActive, isClosed, isPrototype, isRunning, isSingleton, isTypeMatch, isTypeMatch, obtainFreshBeanFactory, onClose, onRefresh, postProcessBeanFactory, prepareBeanFactory, prepareRefresh, publishEvent, publishEvent, publishEvent, refresh, registerBeanPostProcessors, registerListeners, registerShutdownHook, removeApplicationListener, resetCommonCaches, setApplicationStartup, setDisplayName, setEnvironment, setId, setParent, start, stop, toString

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

addProtocolResolver, getClassLoader, getProtocolResolvers, getResource, getResourceByPath, getResourceCache, setClassLoader

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.springframework.context.ConfigurableApplicationContext

addProtocolResolver, setClassLoader

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

getClassLoader, getResource

Constructor Details

AbstractRefreshableApplicationContext

public AbstractRefreshableApplicationContext()

Create a new AbstractRefreshableApplicationContext with no parent.

AbstractRefreshableApplicationContext

public AbstractRefreshableApplicationContext(@Nullable
 ApplicationContext parent)

Create a new AbstractRefreshableApplicationContext with the given parent context.

Parameters:

parent - the parent context

Method Details

setAllowBeanDefinitionOverriding

public void setAllowBeanDefinitionOverriding(boolean allowBeanDefinitionOverriding)

Set whether it should be allowed to override bean definitions by registering a different definition with the same name, automatically replacing the former. If not, an exception will be thrown. Default is "true".

See Also:

• DefaultListableBeanFactory.setAllowBeanDefinitionOverriding(boolean)

setAllowCircularReferences

public void setAllowCircularReferences(boolean allowCircularReferences)

Set whether to allow circular references between beans - and automatically try to resolve them.

Default is "true". Turn this off to throw an exception when encountering a circular reference, disallowing them completely.

See Also:

• AbstractAutowireCapableBeanFactory.setAllowCircularReferences(boolean)

refreshBeanFactory

protected final void refreshBeanFactory()
                                 throws BeansException

This implementation performs an actual refresh of this context's underlying bean factory, shutting down the previous bean factory (if any) and initializing a fresh bean factory for the next phase of the context's lifecycle.

Specified by:

refreshBeanFactory in class AbstractApplicationContext

Throws:

BeansException - if initialization of the bean factory failed

cancelRefresh

protected void cancelRefresh(Throwable ex)

Description copied from class: AbstractApplicationContext

Cancel this context's refresh attempt, resetting the active flag after an exception got thrown.

Overrides:

cancelRefresh in class AbstractApplicationContext

Parameters:

ex - the exception that led to the cancellation

closeBeanFactory

protected final void closeBeanFactory()

Description copied from class: AbstractApplicationContext

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

Should never throw an exception but rather log shutdown failures.

Specified by:

closeBeanFactory in class AbstractApplicationContext

hasBeanFactory

protected final boolean hasBeanFactory()

Determine whether this context currently holds a bean factory, i.e. has been refreshed at least once and not been closed yet.

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()
• AbstractApplicationContext.closeBeanFactory()

assertBeanFactoryActive

protected void assertBeanFactoryActive()

Overridden to turn it into a no-op: With AbstractRefreshableApplicationContext, getBeanFactory() serves a strong assertion for an active context anyway.

Overrides:

assertBeanFactoryActive in class AbstractApplicationContext

createBeanFactory

protected DefaultListableBeanFactory createBeanFactory()

Create an internal bean factory for this context. Called for each AbstractApplicationContext.refresh() attempt.

The default implementation creates a DefaultListableBeanFactory with the internal bean factory of this context's parent as parent bean factory. Can be overridden in subclasses, for example to customize DefaultListableBeanFactory's settings.

Returns:

the bean factory for this context

See Also:

• DefaultListableBeanFactory.setAllowBeanDefinitionOverriding(boolean)
• DefaultListableBeanFactory.setAllowEagerClassLoading(boolean)
• AbstractAutowireCapableBeanFactory.setAllowCircularReferences(boolean)
• AbstractAutowireCapableBeanFactory.setAllowRawInjectionDespiteWrapping(boolean)

customizeBeanFactory

protected void customizeBeanFactory(DefaultListableBeanFactory beanFactory)

Customize the internal bean factory used by this context. Called for each AbstractApplicationContext.refresh() attempt.

The default implementation applies this context's "allowBeanDefinitionOverriding" and "allowCircularReferences" settings, if specified. Can be overridden in subclasses to customize any of DefaultListableBeanFactory's settings.

Parameters:

beanFactory - the newly created bean factory for this context

See Also:

• DefaultListableBeanFactory.setAllowBeanDefinitionOverriding(boolean)
• AbstractAutowireCapableBeanFactory.setAllowCircularReferences(boolean)
• AbstractAutowireCapableBeanFactory.setAllowRawInjectionDespiteWrapping(boolean)
• DefaultListableBeanFactory.setAllowEagerClassLoading(boolean)

loadBeanDefinitions

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

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:

BeansException - if parsing of the bean definitions failed

IOException - if loading of bean definition files failed

See Also:

• PropertiesBeanDefinitionReader
• XmlBeanDefinitionReader