程序包 cn.taketoday.web.servlet

类 ContextLoaderListener

java.lang.Object

cn.taketoday.web.servlet.ContextLoader

cn.taketoday.web.servlet.ContextLoaderListener

所有已实现的接口:

ServletContextListener, EventListener

public class ContextLoaderListener
extends ContextLoader
implements ServletContextListener

Bootstrap listener to start up and shut down Framework's root WebApplicationContext. Simply delegates to ContextLoader as well as to ContextCleanupListener.

ContextLoaderListener supports injecting the root web application context via the ContextLoaderListener(WebApplicationContext) constructor, allowing for programmatic configuration in Servlet initializers. See ApplicationContextInitializer for usage examples.

从以下版本开始:

4.0

作者:

Juergen Hoeller, Chris Beams

另请参阅:

• ContextLoader.setContextInitializers(cn.taketoday.context.ApplicationContextInitializer...)
• ApplicationContextInitializer

字段概要

从类继承的字段 cn.taketoday.web.servlet.ContextLoader

CONFIG_LOCATION_PARAM, CONTEXT_CLASS_PARAM, CONTEXT_ID_PARAM, CONTEXT_INITIALIZER_CLASSES_PARAM, GLOBAL_INITIALIZER_CLASSES_PARAM

构造器概要

构造器

构造器	说明
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.

方法概要

修饰符和类型	方法	说明
void	contextDestroyed(ServletContextEvent event)	Close the root web application context.
void	contextInitialized(ServletContextEvent event)	Initialize the root web application context.

从类继承的方法 cn.taketoday.web.servlet.ContextLoader

closeWebApplicationContext, configureAndRefreshWebApplicationContext, createWebApplicationContext, customizeContext, determineContextClass, determineContextInitializerClasses, getCurrentWebApplicationContext, initWebApplicationContext, loadParentContext, setContextInitializers

从类继承的方法 java.lang.Object

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

构造器详细资料

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 Framework application context will be closed when the contextDestroyed(jakarta.servlet.ServletContextEvent) lifecycle method is invoked on this listener.

另请参阅:

• 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 initializers 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(jakarta.servlet.ServletContext, cn.taketoday.web.servlet.ConfigurableWebApplicationContext) will be called
• Any ApplicationContextInitializer cn.taketoday.context.ApplicationContextInitializer 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 ApplicationContextInitializer 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 Framework application context will be closed when the contextDestroyed(jakarta.servlet.ServletContextEvent) lifecycle method is invoked on this listener.

参数:

context - the application context to manage

另请参阅:

• contextInitialized(ServletContextEvent)
• contextDestroyed(ServletContextEvent)

方法详细资料

contextInitialized

public void contextInitialized(ServletContextEvent event)

Initialize the root web application context.

指定者:

contextInitialized 在接口中 ServletContextListener

contextDestroyed

public void contextDestroyed(ServletContextEvent event)

Close the root web application context.

指定者:

contextDestroyed 在接口中 ServletContextListener