org.springframework.web.context.support
Class WebApplicationContextUtils

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

public abstract class WebApplicationContextUtils
extends java.lang.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, DelegatingVariableResolver

Constructor Summary
WebApplicationContextUtils()
           
 
Method Summary
static WebApplicationContext getRequiredWebApplicationContext(javax.servlet.ServletContext sc)
          Find the root WebApplicationContext for this web application, which is typically loaded via ContextLoaderListener.
static WebApplicationContext getWebApplicationContext(javax.servlet.ServletContext sc)
          Find the root WebApplicationContext for this web application, which is typically loaded via ContextLoaderListener.
static WebApplicationContext getWebApplicationContext(javax.servlet.ServletContext sc, java.lang.String attrName)
          Find a custom WebApplicationContext for this web application.
 
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(javax.servlet.ServletContext sc)
                                                              throws java.lang.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:
java.lang.IllegalStateException - if the root WebApplicationContext could not be found
See Also:
WebApplicationContext.ROOT_WEB_APPLICATION_CONTEXT_ATTRIBUTE

getWebApplicationContext

public static WebApplicationContext getWebApplicationContext(javax.servlet.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(javax.servlet.ServletContext sc,
                                                             java.lang.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