[jboss-user] [JBoss Seam] - Base is null

w17chm4n do-not-reply at jboss.com
Wed Oct 3 09:30:17 EDT 2007


I`m having a problem while trying to run my application (Seam 1.2.1) on JBoss 4.0.5.

Let the code explain...

controllertest.jsp (jsf)

  | <%@page contentType="text/html"%>
  | <%@page pageEncoding="UTF-8"%>
  | 
  | <%@taglib prefix="f" uri="http://java.sun.com/jsf/core"%>
  | <%@taglib prefix="h" uri="http://java.sun.com/jsf/html"%>
  | 
  | <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
  | 
  | <html>
  |     <body>
  |         <f:view>
  |             <h:form id="controller">
  |                 <p>
  |                     <h:commandButton value="Add new category (QuestionCategoryManger)" action="#{QuestionCategoryManager.test}"/>
  |                 </p>
  |             </h:form>
  |         </f:view>
  |     </body>
  | </html>
  | 

QuestionCategoryManager

  | import java.util.List;
  | import javax.ejb.Local;
  | 
  | @Local
  | public interface QuestionCategoryManager {
  |     String test();
  |     void addCategory(String categoryName);
  |     void removeCategory(long id, boolean withQuestions);
  |     void removeCategory(String categoryName, boolean withQuestions);
  |     QuestionCategory getQuestionCategoryById(long id);
  |     QuestionCategory getQuestionCategoryByName(String categoryName);
  |     List<QuestionCategory> getAllQuestionsCategories();
  | }
  | 

QuestionCategoryControllerBean

  | mport javax.ejb.Stateless;
  | import javax.persistence.EntityManager;
  | import javax.persistence.PersistenceContext;
  | 
  | 
  | /**
  |  *
  |  * @author W17chM4n
  |  */
  | 
  | @Stateless(name="QuestionCategoryManger")
  | public class QuestionCategoryManagerBean implements QuestionCategoryManager {
  |     
  |     @PersistenceContext
  |     private EntityManager em;
  |     
  |     public String test() {
  |         return "success";
  |     }
  |     
  |     public void addCategory(String categoryName) {
  |         em.persist(new QuestionCategory(categoryName));
  |     }
  |     
  |     public void removeCategory(long id, boolean withQuestions) {
  |     }
  |     
  |     public void removeCategory(String categoryName, boolean withQuestions) {
  |     }
  |     
  |     public QuestionCategory getQuestionCategoryByName(String categoryName) {
  |         return (QuestionCategory)em.createQuery("from QuestionCategory q where q.categoryName='" + categoryName + "'").getSingleResult();
  |     }
  |     
  |     public QuestionCategory getQuestionCategoryById(long id) {
  |         return (QuestionCategory)em.createQuery("from QuestionCategory q where q.id="+String.valueOf(id)).getSingleResult();
  |     }
  |     
  |     public List<QuestionCategory> getAllQuestionsCategories() {
  |         return em.createQuery("from QuestionCategory q").getResultList();
  |     }
  | }
  | 

So here it is. I`m building it with maven, and while deploying, everything is allright. But when i push the button i get this:


  | 15:21:35,596 ERROR [[Faces Servlet]] Servlet.service() for servlet Faces Servlet threw exception
  | javax.faces.FacesException: Error calling action method of component with id controller:_idJsp0
  |         at org.apache.myfaces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:74)
  |         at javax.faces.component.UICommand.broadcast(UICommand.java:106)
  |         at javax.faces.component.UIViewRoot._broadcastForPhase(UIViewRoot.java:94)
  |         at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:168)
  |         at org.apache.myfaces.lifecycle.LifecycleImpl.invokeApplication(LifecycleImpl.java:343)
  |         at org.apache.myfaces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:86)
  |         at javax.faces.webapp.FacesServlet.service(FacesServlet.java:137)
  |         at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
  |         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.jboss.web.tomcat.tc5.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:156)
  |         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)
  | Caused by: javax.faces.el.EvaluationException: Exception while invoking expression #{QuestionCategoryManager.test}
  |         at org.apache.myfaces.el.MethodBindingImpl.invoke(MethodBindingImpl.java:165)
  |         at org.jboss.seam.actionparam.ActionParamBindingHelper.invokeTheExpression(ActionParamBindingHelper.java:58)
  |         at org.jboss.seam.actionparam.ActionParamMethodBinding.invoke(ActionParamMethodBinding.java:75)
  |         at org.apache.myfaces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:63)
  |         ... 25 more
  | Caused by: javax.faces.el.PropertyNotFoundException: Base is null: QuestionCategoryManager
  |         at org.apache.myfaces.el.ValueBindingImpl.resolveToBaseAndProperty(ValueBindingImpl.java:460)
  |         at org.apache.myfaces.el.MethodBindingImpl.resolveToBaseAndProperty(MethodBindingImpl.java:180)
  |         at org.apache.myfaces.el.MethodBindingImpl.invoke(MethodBindingImpl.java:114)
  |         ... 28 more
  | 

I don`t know why seam can`t find ejb bean. Is there a way to test if SeamInterceptor is running ?

JNDI Namespace tells that the bean exists:

  | +- Inquisitor (class: org.jnp.interfaces.NamingContext)
  |   |   +- QuestionCategoryManger (class: org.jnp.interfaces.NamingContext)
  |   |   |   +- local (proxy: $Proxy191 implements interface com.blstream.inquisitor.ejb3.interfaces.QuestionCategoryManager,interface org.jboss.ejb3.JBossProxy,interface javax.ejb.EJBLocalObject)
  | 

Can anybody help me ?

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