java.lang.Object
- org.springframework.web.context.ContextLoader
- - org.springframework.web.context.ContextLoaderListener

All Implemented Interfaces:
EventListener, ServletContextListener
```
public class ContextLoaderListener
extends ContextLoader
implements ServletContextListener
```
Bootstrap listener to start up and shut down Spring's root WebApplicationContext. Simply delegates to ContextLoader as well as to ContextCleanupListener.
This listener should be registered after Log4jConfigListener in web.xml, if the latter is used.
As of Spring 3.1, ContextLoaderListener supports injecting the root web application context via the ContextLoaderListener(WebApplicationContext) constructor, allowing for programmatic configuration in Servlet 3.0+ environments. See WebApplicationInitializer for usage examples.
Since:
17.02.2003
Author:
Juergen Hoeller, Chris Beams
See Also:
ContextLoader.setContextInitializers(org.springframework.context.ApplicationContextInitializer<?>...), WebApplicationInitializer, Log4jConfigListener

Field Summary
- Fields inherited from class org.springframework.web.context.ContextLoader
  CONFIG_LOCATION_PARAM, CONTEXT_CLASS_PARAM, CONTEXT_ID_PARAM, CONTEXT_INITIALIZER_CLASSES_PARAM, GLOBAL_INITIALIZER_CLASSES_PARAM, LOCATOR_FACTORY_KEY_PARAM, LOCATOR_FACTORY_SELECTOR_PARAM

Constructor Summary

Constructors
Constructor	Description
`ContextLoaderListener()`	Create a new `ContextLoaderListener` that will create a web application context based on the "contextClass" and "contextConfigLocation" servlet context-params.
`ContextLoaderListener(WebApplicationContext context)`	Create a new `ContextLoaderListener` with the given application context.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`contextDestroyed(ServletContextEvent event)`	Close the root web application context.
`void`	`contextInitialized(ServletContextEvent event)`	Initialize the root web application context.

Methods inherited from class org.springframework.web.context.ContextLoader
closeWebApplicationContext, configureAndRefreshWebApplicationContext, createWebApplicationContext, customizeContext, determineContextClass, determineContextInitializerClasses, getCurrentWebApplicationContext, initWebApplicationContext, loadParentContext, setContextInitializers

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - ContextLoaderListener
```
public ContextLoaderListener()
```
    Create a new ContextLoaderListener that will create a web application context based on the "contextClass" and "contextConfigLocation" servlet context-params. See ContextLoader superclass documentation for details on default values for each.
    This constructor is typically used when declaring ContextLoaderListener as a <listener> within web.xml, where a no-arg constructor is required.
    The created application context will be registered into the ServletContext under the attribute name WebApplicationContext.ROOT_WEB_APPLICATION_CONTEXT_ATTRIBUTE and the Spring application context will be closed when the contextDestroyed(javax.servlet.ServletContextEvent) lifecycle method is invoked on this listener.
    See Also:
    ContextLoader, ContextLoaderListener(WebApplicationContext), contextInitialized(ServletContextEvent), contextDestroyed(ServletContextEvent)
  - ContextLoaderListener
```
public ContextLoaderListener(WebApplicationContext context)
```
    Create a new ContextLoaderListener with the given application context. This constructor is useful in Servlet 3.0+ environments where instance-based registration of listeners is possible through the ServletContext.addListener(java.lang.String) API.
    The context may or may not yet be refreshed. If it (a) is an implementation of ConfigurableWebApplicationContext and (b) has not already been refreshed (the recommended approach), then the following will occur:
    If the given context has not already been assigned an id, one will be assigned to it
    ServletContext and ServletConfig objects will be delegated to the application context
    ContextLoader.customizeContext(javax.servlet.ServletContext, org.springframework.web.context.ConfigurableWebApplicationContext) will be called
    Any ApplicationContextInitializers specified through the "contextInitializerClasses" init-param will be applied.
    refresh() will be called
    If the context has already been refreshed or does not implement ConfigurableWebApplicationContext, none of the above will occur under the assumption that the user has performed these actions (or not) per his or her specific needs.
    See WebApplicationInitializer for usage examples.
    In any case, the given application context will be registered into the ServletContext under the attribute name WebApplicationContext.ROOT_WEB_APPLICATION_CONTEXT_ATTRIBUTE and the Spring application context will be closed when the contextDestroyed(javax.servlet.ServletContextEvent) lifecycle method is invoked on this listener.
    Parameters:
    context - the application context to manage
    See Also:
    contextInitialized(ServletContextEvent), contextDestroyed(ServletContextEvent)
- Method Detail
  - contextInitialized
```
public void contextInitialized(ServletContextEvent event)
```
    Initialize the root web application context.
    Specified by:
    contextInitialized in interface ServletContextListener
  - contextDestroyed
```
public void contextDestroyed(ServletContextEvent event)
```
    Close the root web application context.
    Specified by:
    contextDestroyed in interface ServletContextListener

Class ContextLoaderListener

Field Summary

Fields inherited from class org.springframework.web.context.ContextLoader

Constructor Summary

Method Summary

Methods inherited from class org.springframework.web.context.ContextLoader

Methods inherited from class java.lang.Object

Constructor Detail

ContextLoaderListener

ContextLoaderListener

Method Detail

contextInitialized

contextDestroyed