Getting ClassNotFoundException when trying to implement web filter in my JSF app

Question

i have a JSF app and for some reasons i need to refresh the page on browser back button.I tried implementing the solution given in Force JSF to refresh page / view / form when opened via link or back button by BalusC ,the only difference is that my app runs with servlet version 2.5 so i did the mapping in web.xml as below

<?xml version="1.0" encoding="UTF-8"?>

http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5"> javax.faces.STATE_SAVING_METHOD client javax.faces.CONFIG_FILES /WEB-INF/faces-config.xml com.sun.faces.config.ConfigureListener javax.faces.PROJECT_STAGE Production javax.faces.DATETIMECONVERTER_DEFAULT_TIMEZONE_IS_SYSTEM_TIMEZONE true login.xhtml FacesServlet javax.faces.webapp.FacesServlet 1 FacesServlet /faces/ FacesServlet .jsf FacesServlet .faces FacesServlet .xhtml SessionUtil SessionUtil com.gaic.lpsr.utilclasses.SessionUtil SessionUtil /SessionUtil

<filter>
    <filter-name>cacheFilter</filter-name>
    <filter-class>com.gaic.lpsr.utilclasses.NoCacheFilter.java</filter-class>
</filter>
<filter-mapping>
    <filter-name>cacheFilter</filter-name>
    <servlet-name>FacesServlet</servlet-name>

</filter-mapping>

My filter class is

public class NoCacheFilter implements Filter {

@Override
public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException {
    HttpServletRequest request = (HttpServletRequest) req;
    HttpServletResponse response = (HttpServletResponse) res;

    if (!request.getRequestURI().startsWith(request.getContextPath() + ResourceHandler.RESOURCE_IDENTIFIER)) { // Skip JSF resources (CSS/JS/Images/etc)
        response.setHeader("Cache-Control", "no-cache, no-store, must-revalidate"); // HTTP 1.1.
        response.setHeader("Pragma", "no-cache"); // HTTP 1.0.
        response.setDateHeader("Expires", 0); // Proxies.
    }

    chain.doFilter(req, res);
}

@Override
public void destroy() {
    // TODO Auto-generated method stub

}

@Override
public void init(FilterConfig arg0) throws ServletException {
    // TODO Auto-generated method stub

}

// ...

}

I have included the jar servlet-api-2.5.jar.When i try to deploy app in tomcat server(version 6.0.29) i am getting the below error.

SEVERE: Exception starting filter cacheFilter

java.lang.ClassNotFoundException: com.gaic.lpsr.utilclasses.NoCacheFilter.java at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1645) at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1491) at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:269) at org.apache.catalina.core.ApplicationFilterConfig.setFilterDef(ApplicationFilterConfig.java:422) at org.apache.catalina.core.ApplicationFilterConfig.(ApplicationFilterConfig.java:115) at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4001) at org.apache.catalina.core.StandardContext.start(StandardContext.java:4651) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045) at org.apache.catalina.core.StandardHost.start(StandardHost.java:785) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045) at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:445) at org.apache.catalina.core.StandardService.start(StandardService.java:519) at org.apache.catalina.core.StandardServer.start(StandardServer.java:710) at org.apache.catalina.startup.Catalina.start(Catalina.java:581) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)

Please guide me how to fix this problem.

rks rks · Accepted Answer · 2014-02-07T09:56:27

Did silly mistake in web.xml :).Solved by removing .java extension in filter mapping

<filter-class>com.gaic.lpsr.utilclasses.NoCacheFilter</filter-class>

Getting ClassNotFoundException when trying to implement web filter in my JSF app

1 Answers