com.opensymphony.webwork.lifecycle
Class RequestLifecycleFilter

java.lang.Object
  com.opensymphony.webwork.lifecycle.RequestLifecycleFilter

All Implemented Interfaces:

Filter

public class RequestLifecycleFilter

extends Object

implements Filter

A filter to handle the lifecycle of an HTTP request-based XWork component manager.

Author:

Scott N. Smith, Joe Walnes, Bill Lynch (docs)

Constructor Summary

RequestLifecycleFilter()

Method Summary

protected com.opensymphony.xwork.interceptor.component.DefaultComponentManager	createComponentManager() Returns a new DefaultComponentManager instance.
void	destroy() Does nothing.
void	doFilter(ServletRequest request, ServletResponse response, FilterChain chain) Initializes an XWork component manager for the lifetime of the request.
protected ServletContext	getServletContext(HttpSession session) Servlet 2.3 specifies that the servlet context can be retrieved from the session.
void	init(FilterConfig filterConfig) Does nothing.

Methods inherited from class java.lang.Object

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

Constructor Detail

RequestLifecycleFilter

public RequestLifecycleFilter()

Method Detail

destroy

public void destroy()

Does nothing.

Specified by:

destroy in interface Filter

doFilter

public void doFilter(ServletRequest request,
                     ServletResponse response,
                     FilterChain chain)
              throws IOException,
                     ServletException

Initializes an XWork component manager for the lifetime of the request. Once the manager is initialized, control is passed down the filter chain and when it returns the container is destroyed.

Specified by:

doFilter in interface Filter

Parameters:

request - the ServletRequest object

response - the ServletResponse object

chain - the FilterChain object

Throws:

IOException - if an error occurs while executing the filter

ServletException - if an error occurs while executing the filter

init

public void init(FilterConfig filterConfig)
          throws ServletException

Does nothing.

Specified by:

init in interface Filter

Throws:

ServletException

getServletContext

protected ServletContext getServletContext(HttpSession session)

Servlet 2.3 specifies that the servlet context can be retrieved from the session. Unfortunately, some versions of WebLogic can only retrieve the servlet context from the filter config. Hence, this method enables subclasses to retrieve the servlet context from other sources.

Parameters:

session - the HTTP session where, in Servlet 2.3, the servlet context can be retrieved

Returns:

the servlet context.

createComponentManager

protected com.opensymphony.xwork.interceptor.component.DefaultComponentManager createComponentManager()

Returns a new DefaultComponentManager instance. This method is useful for developers wishing to subclass this class and provide a different implementation of DefaultComponentManager.

Returns:

a new DefaultComponentManager instance.