Help please

["Martin Gainty" <mgainty (at) hotmail.com>]

Kevin-

To use CompressionFilter you 
1)override doFilter method to provide filtering response via previously defined 'FilterChain'
2)wrap your regular response as a CompressionServletResponse before sending back to client (as in this example from Kief Morris)

public void doFilter(ServletRequest request
                         ServletResponse response,

                         FilterChain chain)

        throws IOException, ServletException 

    { 


        long startTime = System.currentTimeMillis();

        chain.doFilter(request, response);

        long stopTime = System.currentTimeMillis();

        System.out.println("Time to execute request: " + (stopTime - startTime) + 

            " milliseconds"); 


    }

Later on in the service() doGet() or doPut() methods check the response to  build the appropriate CompressionServletResponseWrapper

if (response instanceof HttpServletResponse) {
        CompressionServletResponseWrapper wrappedResponse =

            new CompressionServletResponseWrapper((HttpServletResponse)response);

        wrappedResponse.setCompressionThreshold(compressionThreshold);

        if (debug > 0) {

            System.out.println("doFilter gets called with compression");

        }
}

Make SURE the actual class (which is displayed from your web.xml) 
is on your classpath or your class is located in  $TOMCAT_HOME/webapps/NameOfYourWebApp/WEB-INF/classes)

The example $TOMCAT_HOME\webapps\servlets-examples\WEB-INF\web.xml displays

<filter>
        <filter-name>Compression Filter</filter-name>
        <filter-class>compressionFilters.CompressionFilter</filter-class>
</filter>


HTH
Martin--

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  ----- Original Message ----- 
  From: Kevin Mullin 
  To: users (at) tomcat.apache.org 
  Sent: Friday, September 15, 2006 11:27 AM
  Subject: Help please



  I've just downloaded Tomcat 5.5.17 and am trying to run it on our mainframe system that is running z/OS 1.7 operating system.  I am getting a failure in Tomcat that says: 
  java.lang.ClassNotFoundException: compressionFilters.CompressionFilter 
  Does anyone know what is causing this, and what I can do to correct it?



        Kevin Mullin
        Sr. Analyst
        IBM Corporation
        (206) 345-7068
        mullink (at) us.ibm.com