19 September 2013

Invoking a Filter By Calling a Servlet

If we need to invoke a Filter when calling a particular servlet the following is the snippet for doing as such


   <filter>
         <filter-name>ViewerFilter</filter-name>
        <filter-class>org.xxx.ViewerFilter</filter-class>
    </filter>
   <filter-mapping>
        <filter-name>ViewerFilter</filter-name>
        <servlet-name>ViewerServlet</servlet-name>
   </filter-mapping>


<servlet>
<servlet-name>ViewerServlet</servlet-name>
<servlet-class>org.xxx.ViewerServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>ViewerServlet</servlet-name>
<url-pattern>/frameset</url-pattern>
</servlet-mapping>


So with the above snippet in “web.xml” if we call the “ViewerServlet” the  “ViewerFilter” is automatically executed.

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