public class SessionInitializerFilter extends Object implements Filter
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 and Description |
|---|
SessionInitializerFilter() |
| Modifier and Type | Method and Description |
|---|---|
void |
destroy()
Called by the web container to indicate to a filter that it is being
taken out of service.
|
void |
doFilter(ServletRequest request,
ServletResponse response,
FilterChain chain)
Calls
HttpServletRequest's getSession() to initialize the
HttpSession and continues processing the chain. |
void |
init(FilterConfig filterConfig)
Called by the web container to indicate to a filter that it is being
placed into service.
|
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException
HttpServletRequest's getSession() to initialize the
HttpSession and continues processing the chain.doFilter in interface Filterrequest - The request to processresponse - The response associated with the requestchain - Provides access to the next filter in the chain for this
filter to pass the request and response to for further
processingIOException - if an I/O error occurs during this filter's
processing of the requestServletException - if the processing fails for any other reasonpublic void init(FilterConfig filterConfig) throws ServletException
javax.servlet.FilterThe web container cannot place the filter into service if the init method either:
init in interface FilterfilterConfig - The configuration information associated with the
filter instance being initialisedServletException - if the initialisation failspublic void destroy()
javax.servlet.FilterCopyright © 2000-2021 Apache Software Foundation. All Rights Reserved.