java.lang.Object
- org.springframework.web.context.AbstractContextLoaderInitializer

All Implemented Interfaces:
WebApplicationInitializer
Direct Known Subclasses:
AbstractDispatcherServletInitializer
```
public abstract class AbstractContextLoaderInitializer
extends Object
implements WebApplicationInitializer
```
Convenient base class for WebApplicationInitializer implementations that register a ContextLoaderListener in the servlet context.
The only method required to be implemented by subclasses is createRootApplicationContext(), which gets invoked from registerContextLoaderListener(ServletContext).
Since:
3.2
Author:
Arjen Poutsma, Chris Beams, Juergen Hoeller

Field Summary
Fields
Modifier and Type Field Description
protected Log logger
Logger available to subclasses

Constructor Summary
Constructors
Constructor Description
AbstractContextLoaderInitializer()

Method Summary

All Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method	Description
`protected abstract WebApplicationContext`	`createRootApplicationContext()`	Create the "root" application context to be provided to the `ContextLoaderListener`.
`protected ApplicationContextInitializer<?>[]`	`getRootApplicationContextInitializers()`	Specify application context initializers to be applied to the root application context that the `ContextLoaderListener` is being created with.
`void`	`onStartup(ServletContext servletContext)`	Configure the given `ServletContext` with any servlets, filters, listeners context-params and attributes necessary for initializing this web application.
`protected void`	`registerContextLoaderListener(ServletContext servletContext)`	Register a `ContextLoaderListener` against the given servlet context.

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

- Field Detail
  - logger
```
protected final Log logger
```
    Logger available to subclasses
- Constructor Detail
  - AbstractContextLoaderInitializer
```
public AbstractContextLoaderInitializer()
```
- Method Detail
  - onStartup
```
public void onStartup(ServletContext servletContext)
               throws ServletException
```
    Description copied from interface: WebApplicationInitializer
    Configure the given ServletContext with any servlets, filters, listeners context-params and attributes necessary for initializing this web application. See examples above.
    Specified by:
    onStartup in interface WebApplicationInitializer
    Parameters:
    servletContext - the ServletContext to initialize
    Throws:
    ServletException - if any call against the given ServletContext throws a ServletException
  - registerContextLoaderListener
```
protected void registerContextLoaderListener(ServletContext servletContext)
```
    Register a ContextLoaderListener against the given servlet context. The ContextLoaderListener is initialized with the application context returned from the createRootApplicationContext() template method.
    Parameters:
    servletContext - the servlet context to register the listener against
  - createRootApplicationContext
```
protected abstract WebApplicationContext createRootApplicationContext()
```
    Create the "root" application context to be provided to the ContextLoaderListener.
    The returned context is delegated to ContextLoaderListener(WebApplicationContext) and will be established as the parent context for any DispatcherServlet application contexts. As such, it typically contains middle-tier services, data sources, etc.
    Returns:
    the root application context, or null if a root context is not desired
    See Also:
    AbstractDispatcherServletInitializer
  - getRootApplicationContextInitializers
```
protected ApplicationContextInitializer<?>[] getRootApplicationContextInitializers()
```
    Specify application context initializers to be applied to the root application context that the ContextLoaderListener is being created with.
    Since:
    4.2
    See Also:
    createRootApplicationContext(), ContextLoader.setContextInitializers(org.springframework.context.ApplicationContextInitializer<?>...)

Class AbstractContextLoaderInitializer

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

logger

Constructor Detail

AbstractContextLoaderInitializer

Method Detail

onStartup

registerContextLoaderListener

createRootApplicationContext

getRootApplicationContextInitializers