Base is null
w17chm4n Oct 3, 2007 9:30 AMI`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 ?