org.chwf.servlet.engine
Class InitFilter

java.lang.Object
  |
  +--org.chwf.servlet.filter.FilterSupport
        |
        +--org.chwf.servlet.engine.InitFilter

All Implemented Interfaces:

javax.servlet.Filter

public class InitFilter

extends FilterSupport

A filter that initializes the Chrysalis environment. It invokes init() during pre-processing and release() during post-processing, with guard methods to ensure that initialization only happens once per request (in case this filter appears more than once in the chain).

Author:

Paul Strack

Constructor Summary

InitFilter()

Method Summary

void	doHttpFilter(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response, javax.servlet.FilterChain chain) Process filter.
void	init(javax.servlet.FilterConfig config) Stores config.
static void	init(javax.servlet.ServletContext context, javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response) Initialize the Chrysalis environment.
static void	release(javax.servlet.http.HttpServletRequest request) Release the Chrysalis environment.

Methods inherited from class org.chwf.servlet.filter.FilterSupport

destroy, doFilter, getConfig

Methods inherited from class java.lang.Object

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

Constructor Detail

InitFilter

public InitFilter()

Method Detail

init

public void init(javax.servlet.FilterConfig config)
          throws javax.servlet.ServletException

Stores config.

Overrides:

init in class FilterSupport

Parameters:

config - The config.

Throws:

javax.servlet.ServletException - For servlet exceptions.

doHttpFilter

public void doHttpFilter(javax.servlet.http.HttpServletRequest request,
                         javax.servlet.http.HttpServletResponse response,
                         javax.servlet.FilterChain chain)
                  throws java.io.IOException,
                         javax.servlet.ServletException

Process filter.

Overrides:

doHttpFilter in class FilterSupport

Parameters:

request - The request.

response - The response.

chain - The filter chain.

Throws:

javax.servlet.ServletException - For servlet exceptions.

java.io.IOException - For IO exceptions.

init

public static void init(javax.servlet.ServletContext context,
                        javax.servlet.http.HttpServletRequest request,
                        javax.servlet.http.HttpServletResponse response)

Initialize the Chrysalis environment.

Parameters:

context - The servlet context.

request - The request.

response - The response.

release

public static void release(javax.servlet.http.HttpServletRequest request)
                    throws javax.servlet.ServletException

Release the Chrysalis environment.

Parameters:

request - The request.

Throws:

javax.servlet.ServletException - For release errors.