2 Replies Latest reply on Jan 23, 2007 8:33 AM by Saif KHan

    configuring Display Tag library with seam

    Saif KHan Newbie

      dear fellows,

      I am have configured the display tag library with jboss seam. It is working to the extent of displaying the data in the <display:table name="list" />.

      when i use the <display:table name="list" export="true" />. It displays the data table and the export options, but when click on export CSV or excel. It gives me the following exception of :

      11:39:35,000 ERROR [UIComponentTag] Faces context not found. getResponseWriter will fail. Check if the FacesServlet has been initialized at all in your web.xml.
      11:39:35,015 ERROR [[jsp]] Servlet.service() for servlet jsp threw exception
      java.lang.NullPointerException
       at javax.faces.webapp.UIComponentTag.setupResponseWriter(UIComponentTag.java:615)
       at javax.faces.webapp.UIComponentTag.doStartTag(UIComponentTag.java:217)
       at org.apache.myfaces.taglib.core.ViewTag.doStartTag(ViewTag.java:71)
       at org.apache.jsp.secretquestions_jsp._jspx_meth_f_view_0(secretquestions_jsp.java:203)
       at org.apache.jsp.secretquestions_jsp._jspService(secretquestions_jsp.java:178)
       at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
       at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
       at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:332)
       at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
       at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
       at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
       at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
       at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
       at org.displaytag.filter.ResponseOverrideFilter.doFilter(ResponseOverrideFilter.java:140)
       at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
       at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
       at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
       at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
       at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
       at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
       at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
       at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:175)
       at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:74)
       at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
       at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
       at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
       at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
       at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
       at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
       at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
       at org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112)
       at java.lang.Thread.run(Thread.java:595)
      


      I have configured the filter and filter mapping for the display tag in the web.xml like:

      <!-- Filter for Display Taglib -->
       <filter>
       <filter-name>ResponseOverrideFilter</filter-name>
       <filter-class>org.displaytag.filter.ResponseOverrideFilter</filter-class>
       </filter>
      
       <filter-mapping>
       <filter-name>ResponseOverrideFilter</filter-name>
       <url-pattern>*.seam</url-pattern>
       </filter-mapping>
       <filter-mapping>
       <filter-name>ResponseOverrideFilter</filter-name>
       <url-pattern>*.jsp</url-pattern>
       </filter-mapping>
      


      can anyone help me on this problem,
      thank you in advance