Package org.apache.catalina.filters

Class SessionInitializerFilter

java.lang.Object

org.apache.catalina.filters.SessionInitializerFilter

All Implemented Interfaces:

Filter

public class SessionInitializerFilter
extends Object
implements Filter

A Filter that initializes the HttpSession for the HttpServletRequest by calling its getSession() method.

This is required for some operations with WebSocket requests, where it is too late to initialize the HttpSession object, and the current Java WebSocket specification does not provide a way to do so.

Constructor Summary

Constructors

Constructor	Description
SessionInitializerFilter()

Method Summary

Modifier and Type	Method	Description
void	doFilter(ServletRequest request, ServletResponse response, FilterChain chain)	Calls HttpServletRequest's getSession() to initialize the HttpSession and continues processing the chain.

Methods inherited from class java.lang.Object

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

Methods inherited from interface javax.servlet.Filter

destroy, init

Constructor Details

SessionInitializerFilter

public SessionInitializerFilter()

Method Details

doFilter

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

Calls HttpServletRequest's getSession() to initialize the HttpSession and continues processing the chain.

Specified by:

doFilter in interface Filter

Parameters:

request - The request to process

response - The response associated with the request

chain - Provides access to the next filter in the chain for this filter to pass the request and response to for further processing

Throws:

IOException - if an I/O error occurs during this filter's processing of the request

ServletException - if the processing fails for any other reason