problem with running a Seam application

[mnrz]

hi

I have a simple application developed by Seam framework, but it has an error when I am going to submit the first page to navigate to another page, the error message as follows:

--------------------
ERROR 04-05 11:41:33,328 (Log4JLogger.java:error:119) -Exception in PhaseListen
er RESTORE_VIEW 1 afterPhase
java.lang.NullPointerException
at org.jboss.seam.contexts.PageContext.getAttributeMap(PageContext.java:
103)
at org.jboss.seam.contexts.PageContext.(PageContext.java:40)
at org.jboss.seam.contexts.Lifecycle.resumePage(Lifecycle.java:323)
at org.jboss.seam.jsf.AbstractSeamPhaseListener.restoreAnyConversationCo
ntext(AbstractSeamPhaseListener.java:39)
at org.jboss.seam.jsf.SeamPhaseListener.afterPhase(SeamPhaseListener.jav
a:63)
at org.apache.myfaces.lifecycle.PhaseListenerManager.informPhaseListener
sAfter(PhaseListenerManager.java:89)
at org.apache.myfaces.lifecycle.LifecycleImpl.restoreView(LifecycleImpl.
java:181)
at org.apache.myfaces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java
:66)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:197)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:252)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:173)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperV
alve.java:213)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextV
alve.java:178)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.j
ava:126)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.j
ava:105)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineVal
ve.java:107)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.jav
a:148)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java
:856)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.proce
ssConnection(Http11Protocol.java:744)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpo
int.java:527)
at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFol
lowerWorkerThread.java:80)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadP
ool.java:684)
at java.lang.Thread.run(Thread.java:595)
ERROR 04-05 11:41:33,375 (Log4JLogger.java:error:119) -Exception in PhaseListen
er RESTORE_VIEW 1 afterPhase
java.lang.NullPointerException
at org.jboss.seam.contexts.PageContext.getAttributeMap(PageContext.java:
103)
at org.jboss.seam.contexts.PageContext.(PageContext.java:40)
at org.jboss.seam.contexts.Lifecycle.resumePage(Lifecycle.java:323)
at org.jboss.seam.jsf.AbstractSeamPhaseListener.restoreAnyConversationCo
ntext(AbstractSeamPhaseListener.java:39)
at org.jboss.seam.jsf.SeamPhaseListener.afterPhase(SeamPhaseListener.jav
a:63)
at org.apache.myfaces.lifecycle.PhaseListenerManager.informPhaseListener
sAfter(PhaseListenerManager.java:89)
at org.apache.myfaces.lifecycle.LifecycleImpl.restoreView(LifecycleImpl.
java:181)
at org.apache.myfaces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java
:66)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:197)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:252)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:173)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperV
alve.java:213)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextV
alve.java:178)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.j
ava:126)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.j
ava:105)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineVal
ve.java:107)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.jav
a:148)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java
:856)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.proce
ssConnection(Http11Protocol.java:744)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpo
int.java:527)
at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFol
lowerWorkerThread.java:80)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadP
ool.java:684)
at java.lang.Thread.run(Thread.java:595)
ERROR 04-05 11:41:33,375 (Log4JLogger.java:error:119) -Servlet.service() for se
rvlet Faces Servlet threw exception
java.lang.NullPointerException
at com.sun.faces.application.ViewHandlerImpl.findMatch(ViewHandlerImpl.j
ava:409)
at com.sun.faces.application.ViewHandlerImpl.calculateLocale(ViewHandler
Impl.java:335)
at org.jboss.seam.jsf.SeamViewHandler.calculateLocale(SeamViewHandler.ja
va:25)
at com.sun.faces.application.ViewHandlerImpl.createView(ViewHandlerImpl.
java:283)
at org.jboss.seam.jsf.SeamViewHandler.createView(SeamViewHandler.java:43
)
at org.apache.myfaces.lifecycle.LifecycleImpl.restoreView(LifecycleImpl.
java:144)
at org.apache.myfaces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java
:66)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:197)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:252)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:173)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperV
alve.java:213)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextV
alve.java:178)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.j
ava:126)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.j
ava:105)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineVal
ve.java:107)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.jav
a:148)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java
:856)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.proce
ssConnection(Http11Protocol.java:744)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpo
int.java:527)
at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFol
lowerWorkerThread.java:80)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadP
ool.java:684)
at java.lang.Thread.run(Thread.java:595)
---------------------

I am using Tomcat version 5.5.9.

please help me out, this problem really confused me.

thank you in advance.

regards

[bfo81]

J2EE Exceptions for themselves are not very informative (that's why debugging really s....). Please post some of your code ;).

[mnrz]

Hi

Ok
this is the code that implements the listener interface:
-----------------------------
package com.payvand.seam;

import java.util.List;
import javax.ejb.Stateless;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;

import org.hibernate.validator.Valid;
import org.jboss.seam.annotations.In;
import org.jboss.seam.annotations.Name;
import org.jboss.seam.core.FacesMessages;

@Stateless
@Name("regis")
public class SessionAction implements Listeners{

@In @Valid
private User user;

@PersistenceContext
private EntityManager em;

public String register() {
// TODO Auto-generated method stub
List listUser=em.createQuery("select username from User where username=:username")
.setParameter("username",user.getUserName()).getResultList();
if(listUser.size()==0){
em.persist(user);
return "/register.jsp";
}
else
{
FacesMessages.instance().add("User #{user.username} already exists");
return null;
}

}

}
-----------------
this is the component.xml file :




false
#{ejbName}/local






----------
here is my ejb-jar.xml:

<ejb-jar>
<assembly-descriptor>
<interceptor-binding>
<ejb-name>*</ejb-name>
<interceptor-class>org.jboss.seam.ejb.SeamInterceptor</interceptor-class>
</interceptor-binding>
</assembly-descriptor>
</ejb-jar>
---
and this is persistence.xml:


<persistence-unit name="userDatabase">
org.hibernate.ejb.HibernatePersistence
<jta-data-source>java:/DefaultDS</jta-data-source>



</persistence-unit>

---
and finally this is the JSP file:

<%@ taglib uri="http://java.sun.com/jsf/html" prefix="h" %>
<%@ taglib uri="http://java.sun.com/jsf/core" prefix="f" %>
<%@ taglib uri="http://jboss.com/products/seam/taglib" prefix="s" %>


<f:view>
<h:form>

<s:validateAll>

Username
<h:inputText value="#{user.userName}" required="true">


Password
<h:inputSecret value="#{user.pass}" required="true">


</s:validateAll>

<h:messages/>
<h:commandButton type="submit" value="Listeners" action="#{regis.register}">
</h:form>

</f:view>

[mnrz]

hi
I thinks the problem is about the register.seam, in the index.jsp there is a link refer to register.seam. when I try to display the page by specifying the http://..../register.jsp, the browser going to display the page but an error occured because of the jsf tags, it says dosnt know those tags. but when I try to show the page in form : http://..../register.seam the following error has been displayed:
----------
java.lang.NullPointerException
com.sun.faces.application.ViewHandlerImpl.findMatch(ViewHandlerImpl.java:409)
com.sun.faces.application.ViewHandlerImpl.calculateLocale(ViewHandlerImpl.java:335)
org.jboss.seam.jsf.SeamViewHandler.calculateLocale(SeamViewHandler.java:25)
com.sun.faces.application.ViewHandlerImpl.createView(ViewHandlerImpl.java:283)
org.jboss.seam.jsf.SeamViewHandler.createView(SeamViewHandler.java:43)
org.apache.myfaces.lifecycle.LifecycleImpl.restoreView(LifecycleImpl.java:144)
org.apache.myfaces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:66)
javax.faces.webapp.FacesServlet.service(FacesServlet.java:197)

[bfo81]

Why is <s:validateAll> empty in the JSP? Maybe you should put the rest (from username to commandButton) in it.

[mnrz]

No it was some tag nested in that but I removed them to see if problem resolved.
if I remove the tag <s:validateAll> nothing will resolve.

as I figured out, it never reach to that page, I think the server cant find that jsp page to show the page, may be something's wrong with url-patterns. the error occured before reach to that jsp file.

thanks

[gavin.king]

Show your web.xml

[mnrz]

Hi Gavin
here is my web.xml

----------------
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.4"
xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">


<!-- Seam -->


<listener-class>org.jboss.seam.servlet.SeamListener</listener-class>



<filter-name>Seam Redirect Filter</filter-name>
<filter-class>org.jboss.seam.servlet.SeamRedirectFilter</filter-class>


<filter-mapping>
<filter-name>Seam Redirect Filter</filter-name>
<url-pattern>*.seam</url-pattern>
</filter-mapping>

<!-- MyFaces -->


<listener-class>org.apache.myfaces.webapp.StartupServletContextListener</listener-class>


<context-param>
<param-name>javax.faces.STATE_SAVING_METHOD</param-name>
<param-value>client</param-value>
</context-param>


<servlet-name>Faces Servlet</servlet-name>
<servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
<load-on-startup>1</load-on-startup>


<!-- Faces Servlet Mapping -->
<servlet-mapping>
<servlet-name>Faces Servlet</servlet-name>
<url-pattern>*.seam</url-pattern>
</servlet-mapping>

</web-app>

[mnrz]

Hi
any idea?

[mnrz]

Show your web.xml

Hi Gavin, Please help me.

[gavin.king]

Looks OK. How about faces-config.xml?

[mnrz]

Looks OK. How about faces-config.xml?

this is my faces-config.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE faces-config
PUBLIC "-//Sun Microsystems, Inc.//DTD JavaServer Faces Config 1.0//EN"
"http://java.sun.com/dtd/web-facesconfig_1_0.dtd">
<faces-config>

<!-- Phase listener needed for all Seam applications -->


<phase-listener>org.jboss.seam.jsf.SeamPhaseListener</phase-listener>


</faces-config>
------------------
component.xml




false
#{ejbName}/local





---------
this is the code between body tag of index.jsp

Welcome to TestSeam

<table border=0>

Register


----
there is a link to a page namely register.jsp inside a folder with the name "pages"

the first page works properly but when I click on the link the exception occurs.

[mnrz]

Looks OK. How about faces-config.xml?

this is my faces-config.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE faces-config
PUBLIC "-//Sun Microsystems, Inc.//DTD JavaServer Faces Config 1.0//EN"
 "http://java.sun.com/dtd/web-facesconfig_1_0.dtd">
<faces-config>

 <!-- Phase listener needed for all Seam applications -->

 <lifecycle>
 <phase-listener>org.jboss.seam.jsf.SeamPhaseListener</phase-listener>
 </lifecycle>

</faces-config>

------------------
component.xml

<components>

 <component name="org.jboss.seam.core.init">
 <property name="myFacesLifecycleBug">false</property>
 <property name="jndiPattern">#{ejbName}/local</property>
 </component>

 <component class="org.jboss.seam.core.Ejb"
 installed="true"/>

</components>

---------
this is the code between body tag of index.jsp

 <p>Welcome to TestSeam</p>
 <table border=0>
 <tr>
 <td><a href="pages/register.seam">Register</a></td></td>
 </tr>
 </table>

----
there is a link to a page namely register.jsp inside a folder with the name "pages"

the first page works properly but when I click on the link the exception occurs.

[gavin.king]

What version of myfaces are you using?

[mnrz]

Hi
I am using myface1.1.3, all the jar files are the same in downloaded Seam framework.