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filters
Class ExampleFilter  

java.lang.Object
  filters.ExampleFilter

All Implemented Interfaces:

javax.servlet.Filter

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public final class ExampleFilter

extends java.lang.Object

implements javax.servlet.Filter

Example filter that can be attached to either an individual servlet or to a URL pattern. This filter performs the following functions:

• Attaches itself as a request attribute, under the attribute name defined by the value of the attribute initialization parameter.
• Calculates the number of milliseconds required to perform the servlet processing required by this request, including any subsequently defined filters, and logs the result to the servlet context log for this application.

Version:

$Revision: 267129 $ $Date: 2004-03-18 11:40:35 -0500 (Thu, 18 Mar 2004) $

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Field Summary
private  java.lang.String	attribute           The request attribute name under which we store a reference to ourself.
private  javax.servlet.FilterConfig	filterConfig           The filter configuration object we are associated with.

 

Constructor Summary

ExampleFilter()

 

Method Summary
void	destroy()           Take this filter out of service.
void	doFilter(javax.servlet.ServletRequest request, javax.servlet.ServletResponse response, javax.servlet.FilterChain chain)           Time the processing that is performed by all subsequent filters in the current filter stack, including the ultimately invoked servlet.
void	init(javax.servlet.FilterConfig filterConfig)           Place this filter into service.
java.lang.String	toString()           Return a String representation of this object.

 

Methods inherited from class java.lang.Object

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

 

Field Detail

attribute

private java.lang.String attribute

The request attribute name under which we store a reference to ourself.

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filterConfig

private javax.servlet.FilterConfig filterConfig

The filter configuration object we are associated with. If this value is null, this filter instance is not currently configured.

Constructor Detail

ExampleFilter

public ExampleFilter()

Method Detail

destroy

public void destroy()

Take this filter out of service.

Specified by:

destroy in interface javax.servlet.Filter

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doFilter

public void doFilter(javax.servlet.ServletRequest request,
                     javax.servlet.ServletResponse response,
                     javax.servlet.FilterChain chain)
              throws java.io.IOException,
                     javax.servlet.ServletException

Time the processing that is performed by all subsequent filters in the current filter stack, including the ultimately invoked servlet.

Specified by:

doFilter in interface javax.servlet.Filter

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init

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

Place this filter into service.

Specified by:

init in interface javax.servlet.Filter

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toString

public java.lang.String toString()

Return a String representation of this object.

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