RandomSec/broker/core/WEB-INF/web.xml

<?xml version="1.0"?>

<!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>
     
    <servlet>
        <servlet-name>refine-broker</servlet-name>
        <servlet-class>edu.mit.simile.butterfly.Butterfly</servlet-class>
    </servlet>

    <servlet-mapping>
        <servlet-name>refine-broker</servlet-name>
        <url-pattern>/*</url-pattern>
    </servlet-mapping>
        
</web-app>