web.xml: filter-name and filter-mapping
<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE web-app
PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.2//EN"
"http://java.sun.com/j2ee/dtds/web-app_2_2.dtd">
<web-app>
<filter>
<filter-name>log</filter-name>
<filter-class>LogFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>log</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
</web-app>
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