javawebparts.filter
Class ElapsedTimeFilter

java.lang.Object
  |
  +--javawebparts.filter.ElapsedTimeFilter
All Implemented Interfaces:
javax.servlet.Filter

public class ElapsedTimeFilter
extends java.lang.Object
implements javax.servlet.Filter

This filter writes to the log a message at the end of every request to show the elapsed time for the request. It allows for including or excluding paths from filter functionality.

Init parameters are:


Example configuration in web.xml:

<filter>
  <filter-name>ElapsedTimeFilter</filter-name>
  <filter-class>javawebparts.filter.ElapsedTimeFilter</ filter-class>
  <init-param>
    <param-name>pathSpec</param-name>
    <param-value>include</param-value>
  </init-param>
  <init-param>
    <param-name>pathList</param-name>
    <param-value>*</param-value>
  </init-param>
</filter>

<filter-mapping>
  <filter-name>ElapsedTimeFilter</filter-name>
  <url-pattern>/*</url-pattern>
</filter-mapping>

Author:
Frank W. Zammetti.

Field Summary
private static org.apache.commons.logging.Log log
          Log instance.
private  java.util.ArrayList pathList
          List of paths for filter functionality determination.
private  java.lang.String pathSpec
          Whether pathList includes or excludes.
 
Constructor Summary
ElapsedTimeFilter()
           
 
Method Summary
 void destroy()
          Destroy.
 void doFilter(javax.servlet.ServletRequest request, javax.servlet.ServletResponse response, javax.servlet.FilterChain filterChain)
          Do filter's work.
 void init(javax.servlet.FilterConfig filterConfig)
          Initialize this filter.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

log

private static org.apache.commons.logging.Log log
Log instance.


pathSpec

private java.lang.String pathSpec
Whether pathList includes or excludes.


pathList

private java.util.ArrayList pathList
List of paths for filter functionality determination.

Constructor Detail

ElapsedTimeFilter

public ElapsedTimeFilter()
Method Detail

init

public void init(javax.servlet.FilterConfig filterConfig)
          throws javax.servlet.ServletException
Initialize this filter.

Specified by:
init in interface javax.servlet.Filter
Parameters:
filterConfig - The configuration information for this filter.
Throws:
javax.servlet.ServletException - ServletException.

destroy

public void destroy()
Destroy.

Specified by:
destroy in interface javax.servlet.Filter

doFilter

public void doFilter(javax.servlet.ServletRequest request,
                     javax.servlet.ServletResponse response,
                     javax.servlet.FilterChain filterChain)
              throws javax.servlet.ServletException,
                     java.io.IOException
Do filter's work.

Specified by:
doFilter in interface javax.servlet.Filter
Parameters:
request - The current request object.
response - The current response object.
filterChain - The current filter chain.
Throws:
javax.servlet.ServletException - ServletException.
java.io.IOException - IOException.


Copyright 2005 Frank W. Zammetti