Filters and wlserver6.1 - Unable to deploy

Question

All,
I am new to deploying Filter. I have a simple Filter class and am trying to log
every request. Below is the part of web.xml:
     <filter>
          <filter-name>Blocker</filter-name>
               <filter-class>
                    com.icechill.filters.BlockBrowserFilter
               </filter-class>
     </filter>
     <filter-mapping>
          <filter-name>Blocker</filter-name>
          <url-pattern>iceChill</url-pattern>
     </filter-mapping>
During wlserver6.1 startup, I get the exception below and none of the webapp works.
Please help. Thanks.
java.lang.AbstractMethodError
at weblogic.servlet.internal.WebAppServletContext.registerFilter(WebAppServletContext.java:1945)
at weblogic.servlet.internal.WebAppServletContext.initFromDescriptors(WebAppServletContext.java:1307)
at weblogic.servlet.internal.WebAppServletContext.init(WebAppServletContext.java:880)
at weblogic.servlet.internal.WebAppServletContext.<init>(WebAppServletContext.java:815)
at weblogic.servlet.internal.HttpServer.loadWebApp(HttpServer.java:428)
at weblogic.j2ee.WebAppComponent.deploy(WebAppComponent.java:74)
at weblogic.j2ee.Application.addComponent(Application.java:163)

Answer 1

Now I know the answer. Even though you can run wlserver6.1 with J2EE1.3 features,
the Filter object expected by interal wlserver6.1 classes is according to non
final servlet 2.3 spec.
All you have to do is, add couple of methods in the custom Filter class:
setFilterConfig(FilterConfig config);
getFilterConfig();
init() method is never called.
Also you can't substitute an instance of HttpServletRequestWrapper when calling
doFilter() on the FilterChain object if you run wlportal4.0 applications.
ApplicationHelper class in com.bea.p13n.management package expects an instance
of weblogic.servlet.internal.ServletRequestImpl which is a final class.
Having said that, can anyone from BEA tell me if custom Filters can be implemented
using HttpRequestWrapper in wl7.0?
Thanks.
"Sai S Prasad" <[email protected]> wrote:
>
Sorry. Below is the correct version of web.xml:
     <filter>
          <filter-name>Blocker</filter-name>
               <filter-class>
                    com.icechill.filters.BlockBrowserFilter
               </filter-class>
     </filter>
     <filter-mapping>
          <filter-name>Blocker</filter-name>
          <url-pattern>/*</url-pattern>
     </filter-mapping>
"Sai S Prasad" <[email protected]> wrote:
All,
I am new to deploying Filter. I have a simple Filter class and am trying
to log
every request. Below is the part of web.xml:
     <filter>
          <filter-name>Blocker</filter-name>
               <filter-class>
                    com.icechill.filters.BlockBrowserFilter
               </filter-class>
     </filter>
     <filter-mapping>
          <filter-name>Blocker</filter-name>
          <url-pattern>iceChill</url-pattern>
     </filter-mapping>
During wlserver6.1 startup, I get the exception below and none of the
webapp works.
Please help. Thanks.
java.lang.AbstractMethodError
at weblogic.servlet.internal.WebAppServletContext.registerFilter(WebAppServletContext.java:1945)
at weblogic.servlet.internal.WebAppServletContext.initFromDescriptors(WebAppServletContext.java:1307)
at weblogic.servlet.internal.WebAppServletContext.init(WebAppServletContext.java:880)
at weblogic.servlet.internal.WebAppServletContext.<init>(WebAppServletContext.java:815)
at weblogic.servlet.internal.HttpServer.loadWebApp(HttpServer.java:428)
at weblogic.j2ee.WebAppComponent.deploy(WebAppComponent.java:74)
at weblogic.j2ee.Application.addComponent(Application.java:163)