org.springframework.context.access

Class ContextSingletonBeanFactoryLocator

java.lang.Object

org.springframework.beans.factory.access.SingletonBeanFactoryLocator

org.springframework.context.access.ContextSingletonBeanFactoryLocator

All Implemented Interfaces:

BeanFactoryLocator

public class ContextSingletonBeanFactoryLocator
extends SingletonBeanFactoryLocator

Variant of SingletonBeanFactoryLocator which creates its internal bean factory reference as an ApplicationContext instead of SingletonBeanFactoryLocator's simple BeanFactory. For almost all usage scenarios, this will not make a difference, since within that ApplicationContext or BeanFactory you are still free to define either BeanFactory or ApplicationContext instances. The main reason one would need to use this class is if bean post-processing (or other ApplicationContext specific features are needed in the bean reference definition itself).

Note: This class uses classpath*:beanRefContext.xml as the default resource location for the bean factory reference definition files. It is not possible nor legal to share definitions with SingletonBeanFactoryLocator at the same time.

Author:

Colin Sampaleanu, Juergen Hoeller

See Also:

SingletonBeanFactoryLocator, DefaultLocatorFactory

Field Summary

Fields

Modifier and Type	Field and Description
private static java.lang.String	DEFAULT_RESOURCE_LOCATION
private static java.util.Map<java.lang.String,BeanFactoryLocator>	instances The keyed singleton instances

Fields inherited from class org.springframework.beans.factory.access.SingletonBeanFactoryLocator

logger

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	ContextSingletonBeanFactoryLocator(java.lang.String resourceLocation) Constructor which uses the the specified name as the resource name of the definition file(s).

Method Summary

Modifier and Type	Method and Description
protected BeanFactory	createDefinition(java.lang.String resourceLocation, java.lang.String factoryKey) Overrides the default method to create definition object as an ApplicationContext instead of the default BeanFactory.
protected void	destroyDefinition(BeanFactory groupDef, java.lang.String selector) Overrides the default method to operate on an ApplicationContext, invoking ConfigurableApplicationContext.close().
static BeanFactoryLocator	getInstance() Returns an instance which uses the default "classpath*:beanRefContext.xml", as the name of the definition file(s).
static BeanFactoryLocator	getInstance(java.lang.String selector) Returns an instance which uses the the specified selector, as the name of the definition file(s).
protected void	initializeDefinition(BeanFactory groupDef) Overrides the default method to refresh the ApplicationContext, invoking ConfigurableApplicationContext.refresh().

Methods inherited from class org.springframework.beans.factory.access.SingletonBeanFactoryLocator

useBeanFactory

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_RESOURCE_LOCATION

private static final java.lang.String DEFAULT_RESOURCE_LOCATION

See Also:

Constant Field Values

instances

private static final java.util.Map<java.lang.String,BeanFactoryLocator> instances

The keyed singleton instances

Constructor Detail

ContextSingletonBeanFactoryLocator

protected ContextSingletonBeanFactoryLocator(java.lang.String resourceLocation)

Constructor which uses the the specified name as the resource name of the definition file(s).

Parameters:

resourceLocation - the Spring resource location to use (either a URL or a "classpath:" / "classpath*:" pseudo URL)

Method Detail

getInstance

public static BeanFactoryLocator getInstance()
                                      throws BeansException

Returns an instance which uses the default "classpath*:beanRefContext.xml", as the name of the definition file(s). All resources returned by the current thread's context class loader's getResources method with this name will be combined to create a definition, which is just a BeanFactory.

Returns:

the corresponding BeanFactoryLocator instance

Throws:

BeansException - in case of factory loading failure

getInstance

public static BeanFactoryLocator getInstance(java.lang.String selector)
                                      throws BeansException

Returns an instance which uses the the specified selector, as the name of the definition file(s). In the case of a name with a Spring "classpath*:" prefix, or with no prefix, which is treated the same, the current thread's context class loader's getResources method will be called with this value to get all resources having that name. These resources will then be combined to form a definition. In the case where the name uses a Spring "classpath:" prefix, or a standard URL prefix, then only one resource file will be loaded as the definition.

Parameters:

selector - the location of the resource(s) which will be read and combined to form the definition for the BeanFactoryLocator instance. Any such files must form a valid ApplicationContext definition.

Returns:

the corresponding BeanFactoryLocator instance

Throws:

BeansException - in case of factory loading failure

createDefinition

protected BeanFactory createDefinition(java.lang.String resourceLocation,
                                       java.lang.String factoryKey)

Overrides the default method to create definition object as an ApplicationContext instead of the default BeanFactory. This does not affect what can actually be loaded by that definition.

The default implementation simply builds a ClassPathXmlApplicationContext.

Overrides:

createDefinition in class SingletonBeanFactoryLocator

Parameters:

resourceLocation - the resource location for this factory group

factoryKey - the bean name of the factory to obtain

Returns:

the corresponding BeanFactory reference

initializeDefinition

protected void initializeDefinition(BeanFactory groupDef)

Overrides the default method to refresh the ApplicationContext, invoking ConfigurableApplicationContext.refresh().

Overrides:

initializeDefinition in class SingletonBeanFactoryLocator

Parameters:

groupDef - the factory returned by createDefinition()

destroyDefinition

protected void destroyDefinition(BeanFactory groupDef,
                                 java.lang.String selector)

Overrides the default method to operate on an ApplicationContext, invoking ConfigurableApplicationContext.close().

Overrides:

destroyDefinition in class SingletonBeanFactoryLocator

Parameters:

groupDef - the factory returned by createDefinition()

selector - the resource location for this factory group