org.springframework.web.context.support
Class WebApplicationContextUtils

java.lang.Object
  org.springframework.web.context.support.WebApplicationContextUtils

public abstract class WebApplicationContextUtils
extends Object

Convenience methods for retrieving the root WebApplicationContext for a given ServletContext. This is e.g. useful for accessing a Spring context from within custom web views or Struts actions.

Note that there are more convenient ways of accessing the root context for many web frameworks, either part of Spring or available as external library. This helper class is just the most generic way to access the root context.

Author:

Juergen Hoeller

See Also:

ContextLoader, FrameworkServlet, DispatcherServlet, FacesContextUtils, SpringBeanVariableResolver, SpringBeanFacesELResolver

Constructor Summary

WebApplicationContextUtils()

Method Summary

static WebApplicationContext	getRequiredWebApplicationContext(ServletContext sc) Find the root WebApplicationContext for this web application, which is typically loaded via ContextLoaderListener.
static WebApplicationContext	getWebApplicationContext(ServletContext sc) Find the root WebApplicationContext for this web application, which is typically loaded via ContextLoaderListener.
static WebApplicationContext	getWebApplicationContext(ServletContext sc, String attrName) Find a custom WebApplicationContext for this web application.
static void	registerEnvironmentBeans(ConfigurableListableBeanFactory bf, ServletContext sc) Register web-specific environment beans ("contextParameters", "contextAttributes") with the given BeanFactory, as used by the WebApplicationContext.
static void	registerEnvironmentBeans(ConfigurableListableBeanFactory bf, ServletContext sc, ServletConfig config) Register web-specific environment beans ("contextParameters", "contextAttributes") with the given BeanFactory, as used by the WebApplicationContext.
static void	registerWebApplicationScopes(ConfigurableListableBeanFactory beanFactory) Register web-specific scopes ("request", "session", "globalSession") with the given BeanFactory, as used by the WebApplicationContext.
static void	registerWebApplicationScopes(ConfigurableListableBeanFactory beanFactory, ServletContext sc) Register web-specific scopes ("request", "session", "globalSession", "application") with the given BeanFactory, as used by the WebApplicationContext.

Methods inherited from class java.lang.Object

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

Constructor Detail

WebApplicationContextUtils

public WebApplicationContextUtils()

Method Detail

getRequiredWebApplicationContext

public static WebApplicationContext getRequiredWebApplicationContext(ServletContext sc)
                                                              throws IllegalStateException

Find the root WebApplicationContext for this web application, which is typically loaded via ContextLoaderListener.

Will rethrow an exception that happened on root context startup, to differentiate between a failed context startup and no context at all.

Parameters:

sc - ServletContext to find the web application context for

Returns:

the root WebApplicationContext for this web app

Throws:

IllegalStateException - if the root WebApplicationContext could not be found

See Also:

WebApplicationContext.ROOT_WEB_APPLICATION_CONTEXT_ATTRIBUTE

getWebApplicationContext

public static WebApplicationContext getWebApplicationContext(ServletContext sc)

Find the root WebApplicationContext for this web application, which is typically loaded via ContextLoaderListener.

Will rethrow an exception that happened on root context startup, to differentiate between a failed context startup and no context at all.

Parameters:

sc - ServletContext to find the web application context for

Returns:

the root WebApplicationContext for this web app, or null if none

See Also:

WebApplicationContext.ROOT_WEB_APPLICATION_CONTEXT_ATTRIBUTE

getWebApplicationContext

public static WebApplicationContext getWebApplicationContext(ServletContext sc,
                                                             String attrName)

Find a custom WebApplicationContext for this web application.

Parameters:

sc - ServletContext to find the web application context for

attrName - the name of the ServletContext attribute to look for

Returns:

the desired WebApplicationContext for this web app, or null if none

registerWebApplicationScopes

public static void registerWebApplicationScopes(ConfigurableListableBeanFactory beanFactory)

Register web-specific scopes ("request", "session", "globalSession") with the given BeanFactory, as used by the WebApplicationContext.

Parameters:

beanFactory - the BeanFactory to configure

registerWebApplicationScopes

public static void registerWebApplicationScopes(ConfigurableListableBeanFactory beanFactory,
                                                ServletContext sc)

Register web-specific scopes ("request", "session", "globalSession", "application") with the given BeanFactory, as used by the WebApplicationContext.

Parameters:

beanFactory - the BeanFactory to configure

sc - the ServletContext that we're running within

registerEnvironmentBeans

public static void registerEnvironmentBeans(ConfigurableListableBeanFactory bf,
                                            ServletContext sc)

Register web-specific environment beans ("contextParameters", "contextAttributes") with the given BeanFactory, as used by the WebApplicationContext.

Parameters:

bf - the BeanFactory to configure

sc - the ServletContext that we're running within

registerEnvironmentBeans

public static void registerEnvironmentBeans(ConfigurableListableBeanFactory bf,
                                            ServletContext sc,
                                            ServletConfig config)

Register web-specific environment beans ("contextParameters", "contextAttributes") with the given BeanFactory, as used by the WebApplicationContext.

Parameters:

bf - the BeanFactory to configure

sc - the ServletContext that we're running within

config - the ServletConfig of the containing Portlet