Seam-gen from Seam In Action by Dan Allen

[metaphysicist]

Hi

Due to a problem with the H2 database I followed the advice of another poster in a related thread and switched to using MySql with seam-gen. I manually populated the database using the sql scripts provided by Dan Allen in the source code accompanying his book. This has delivered limited success.When I try to open the HoleList page for example I get the following error:

Could not instantiate Seam component: holeList

Here is the top end of the stack trace:

org.jboss.seam.InstantiationException: Could not instantiate Seam component: holeList
at org.jboss.seam.Component.newInstance(Component.java:2144)
at org.jboss.seam.Component.getInstance(Component.java:2021)
at org.jboss.seam.Component.getInstance(Component.java:1983)
at org.jboss.seam.Component.getInstance(Component.java:1977)
at org.jboss.seam.Namespace.getComponentInstance(Namespace.java:55)
at org.jboss.seam.Namespace.getComponentInstance(Namespace.java:50)
at org.jboss.seam.el.SeamELResolver.resolveBase(SeamELResolver.java:148)
at org.jboss.seam.el.SeamELResolver.getValue(SeamELResolver.java:51)
at javax.el.CompositeELResolver.getValue(CompositeELResolver.java:53)

Heer is the bottom end of the stack trace:

Caused by: javax.naming.NameNotFoundException: entityManager not bound
at org.jnp.server.NamingServer.getBinding(NamingServer.java:529)
at org.jnp.server.NamingServer.getBinding(NamingServer.java:537)
at org.jnp.server.NamingServer.getObject(NamingServer.java:543)
at org.jnp.server.NamingServer.lookup(NamingServer.java:296)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:667)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:627)
at javax.naming.InitialContext.lookup(InitialContext.java:351)
at org.jboss.seam.persistence.ManagedPersistenceContext.getEntityManagerFactoryFromJndiOrValueBinding(ManagedPersistenceContext.java:241)
... 126 more


I do have a holeList.class action class under WEB-INF\dev.

Has anyone encountered this error before or understand why it might be happening?

thanks
Paul Meehan

[rgoytacaz]

Hey Paul,

I dont know whats going on, because I have 3 posts about problems in the latest seam-gen (in my case I use postgresql) and nobody answers, like theres an NDA on seam-gen.

I don't wanna make you lose your hopes, but my opnion now, is. Seam-gen DOESNT WORK.

I just went deeper into the book and got the stuff done manually.

Dellacqua

[swd847]

post your persistence.xml and components.xml. The problem is that the server cannot get the entityManager from JNDI.

Also what app server are you using.

[metaphysicist]

Thank you to both posters who replied!

I am using jboss-4.2.2.GA

HERE IS MY components.xml:

<?xml version="1.0" encoding="UTF-8"?>
<components xmlns="http://jboss.com/products/seam/components"
            xmlns:core="http://jboss.com/products/seam/core"
            xmlns:persistence="http://jboss.com/products/seam/persistence"
            xmlns:drools="http://jboss.com/products/seam/drools"
            xmlns:bpm="http://jboss.com/products/seam/bpm"
            xmlns:security="http://jboss.com/products/seam/security"
            xmlns:mail="http://jboss.com/products/seam/mail"
            xmlns:web="http://jboss.com/products/seam/web"
            xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
            xsi:schemaLocation=
                "http://jboss.com/products/seam/core http://jboss.com/products/seam/core-2.2.xsd
                 http://jboss.com/products/seam/persistence http://jboss.com/products/seam/persistence-2.2.xsd
                 http://jboss.com/products/seam/drools http://jboss.com/products/seam/drools-2.2.xsd
                 http://jboss.com/products/seam/bpm http://jboss.com/products/seam/bpm-2.2.xsd
                 http://jboss.com/products/seam/security http://jboss.com/products/seam/security-2.2.xsd
                 http://jboss.com/products/seam/mail http://jboss.com/products/seam/mail-2.2.xsd
                 http://jboss.com/products/seam/web http://jboss.com/products/seam/web-2.2.xsd
                 http://jboss.com/products/seam/components http://jboss.com/products/seam/components-2.2.xsd">

   <core:init debug="@debug@" jndi-pattern="@jndiPattern@"/>

   <core:manager concurrent-request-timeout="500"
                 conversation-timeout="120000"
                 conversation-id-parameter="cid"
                 parent-conversation-id-parameter="pid"/>

   <!-- Make sure this URL pattern is the same as that used by the Faces Servlet -->
   <web:hot-deploy-filter url-pattern="*.seam"/>

   <!-- If you are still using JBoss 4, uncomment this to have you PU started -->
   <persistence:entity-manager-factory name="entityManagerFactory"
                      persistence-unit-name="open18"
                                  installed="@seamBootstrapsPu@"/>

   <persistence:managed-persistence-context name="entityManager" auto-create="true"
                          entity-manager-factory="@seamEmfRef@"
                      persistence-unit-jndi-name="@puJndiName@"/>

   <drools:rule-base name="securityRules">
      <drools:rule-files><value>/security.drl</value></drools:rule-files>
   </drools:rule-base>

   <security:rule-based-permission-resolver security-rules="#{securityRules}"/>

   <security:identity authenticate-method="#{authenticator.authenticate}" remember-me="true"/>

   <event type="org.jboss.seam.security.notLoggedIn">
      <action execute="#{redirect.captureCurrentView}"/>
   </event>
   <event type="org.jboss.seam.security.loginSuccessful">
      <action execute="#{redirect.returnToCapturedView}"/>
   </event>

   <mail:mail-session host="localhost" port="25"/>

   <!-- For use with jBPM pageflow or process management -->
   <!--
   <bpm:jbpm>
      <bpm:process-definitions></bpm:process-definitions>
      <bpm:pageflow-definitions></bpm:pageflow-definitions>
   </bpm:jbpm>
   -->

</components>

HERE IS MY persistence.xml for the dev profile (persistence-dev.xml):

<?xml version="1.0" encoding="UTF-8"?>
<!-- Persistence deployment descriptor for dev profile -->
<persistence xmlns="http://java.sun.com/xml/ns/persistence"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd"
             version="1.0">
            
   <persistence-unit name="open18" transaction-type="JTA">
      <provider>org.hibernate.ejb.HibernatePersistence</provider>
      <jta-data-source>open18Datasource</jta-data-source>
      <properties>
         <property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect"/>
         <property name="hibernate.hbm2ddl.auto" value="update"/>
         <property name="hibernate.show_sql" value="true"/>
         <property name="hibernate.format_sql" value="true"/>
         <property name="hibernate.default_catalog" value="open18"/>
         <property name="hibernate.default_schema" value="open18"/>
         <!-- Only relevant if Seam is loading the persistence unit (Java SE bootstrap) -->
         <property name="hibernate.transaction.manager_lookup_class" value="@transactionManagerLookupClass@"/>
      </properties>
   </persistence-unit>
   
</persistence>



THANK YOU

[metaphysicist]

I upgraded to version 5 of JBOSS AS and the problem seems to have gone away. But I do get a new exception now:

org.jboss.seam.InstantiationException: Could not instantiate Seam component: courseList
     at org.jboss.seam.Component.newInstance(Component.java:2144)
     at org.jboss.seam.Component.getInstance(Component.java:2021)
     at org.jboss.seam.Component.getInstance(Component.java:1983)
     at org.jboss.seam.Component.getInstance(Component.java:1977)
     at org.jboss.seam.Namespace.getComponentInstance(Namespace.java:55)
     at org.jboss.seam.Namespace.getComponentInstance(Namespace.java:50)
     at org.jboss.seam.el.SeamELResolver.resolveBase(SeamELResolver.java:148)
     at org.jboss.seam.el.SeamELResolver.getValue(SeamELResolver.java:51)
     at javax.el.CompositeELResolver.getValue(CompositeELResolver.java:54)
     at com.sun.faces.el.FacesCompositeELResolver.getValue(FacesCompositeELResolver.java:72)
     at org.jboss.el.parser.AstIdentifier.getValue(AstIdentifier.java:44)
     at org.jboss.el.parser.AstValue.getValue(AstValue.java:63)
     at org.jboss.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:186)
     at com.sun.facelets.el.TagValueExpression.getValue(TagValueExpression.java:71)
     at javax.faces.component.UIOutput.getValue(UIOutput.java:184)
     at com.sun.faces.renderkit.html_basic.HtmlBasicInputRenderer.getValue(HtmlBasicInputRenderer.java:201)
     at com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.getCurrentValue(HtmlBasicRenderer.java:284)
     at com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.encodeEnd(HtmlBasicRenderer.java:154)
     at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:861)
     at org.jboss.seam.ui.util.cdk.RendererBase.renderChild(RendererBase.java:190)
     at org.jboss.seam.ui.util.cdk.RendererBase.renderChildren(RendererBase.java:166)
     at org.jboss.seam.ui.renderkit.DecorateRendererBase.doEncodeChildren(DecorateRendererBase.java:152)
     at org.jboss.seam.ui.util.cdk.RendererBase.encodeChildren(RendererBase.java:92)
     at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:837)
     at org.ajax4jsf.renderkit.RendererBase.renderChild(RendererBase.java:277)
     at org.ajax4jsf.renderkit.RendererBase.renderChildren(RendererBase.java:258)
     at org.richfaces.renderkit.html.SimpleToggleControlTemplate.doEncodeChildren(SimpleToggleControlTemplate.java:347)
     at org.richfaces.renderkit.html.SimpleToggleControlTemplate.doEncodeChildren(SimpleToggleControlTemplate.java:342)
     at org.ajax4jsf.renderkit.RendererBase.encodeChildren(RendererBase.java:120)
     at org.richfaces.renderkit.html.SimpleTogglePanelRenderer.encodeChildren(SimpleTogglePanelRenderer.java:186)
     at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:837)
     at javax.faces.component.UIComponent.encodeAll(UIComponent.java:930)
     at javax.faces.render.Renderer.encodeChildren(Renderer.java:148)
     at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:837)
     at javax.faces.component.UIComponent.encodeAll(UIComponent.java:930)
     at javax.faces.component.UIComponent.encodeAll(UIComponent.java:933)
     at com.sun.facelets.FaceletViewHandler.renderView(FaceletViewHandler.java:592)
     at org.ajax4jsf.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:100)
     at org.ajax4jsf.application.AjaxViewHandler.renderView(AjaxViewHandler.java:176)
     at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:110)
     at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:100)
     at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:139)
     at javax.faces.webapp.FacesServlet.service(FacesServlet.java:266)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
     at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:83)
     at org.jboss.seam.web.IdentityFilter.doFilter(IdentityFilter.java:40)
     at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
     at org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:90)
     at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
     at org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:64)
     at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
     at org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:45)
     at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
     at org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:178)
     at org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:290)
     at org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:368)
     at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:495)
     at org.jboss.seam.web.Ajax4jsfFilter.doFilter(Ajax4jsfFilter.java:56)
     at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
     at org.jboss.seam.web.LoggingFilter.doFilter(LoggingFilter.java:60)
     at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
     at org.jboss.seam.web.HotDeployFilter.doFilter(HotDeployFilter.java:53)
     at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
     at org.jboss.seam.servlet.SeamFilter.doFilter(SeamFilter.java:158)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
     at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:235)
     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
     at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:190)
     at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:433)
     at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:92)
     at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.process(SecurityContextEstablishmentValve.java:126)
     at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.invoke(SecurityContextEstablishmentValve.java:70)
     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
     at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:158)
     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
     at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:330)
     at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:829)
     at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:598)
     at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
     at java.lang.Thread.run(Thread.java:619)
Caused by: java.lang.NullPointerException
     at org.hibernate.cache.impl.bridge.RegionFactoryCacheProviderBridge.nextTimestamp(RegionFactoryCacheProviderBridge.java:85)
     at org.hibernate.impl.SessionFactoryImpl.openSession(SessionFactoryImpl.java:526)
     at org.hibernate.ejb.EntityManagerImpl.getRawSession(EntityManagerImpl.java:87)
     at org.hibernate.ejb.EntityManagerImpl.getSession(EntityManagerImpl.java:67)
     at org.hibernate.ejb.AbstractEntityManagerImpl.joinTransaction(AbstractEntityManagerImpl.java:436)
     at org.hibernate.ejb.AbstractEntityManagerImpl.postInit(AbstractEntityManagerImpl.java:82)
     at org.hibernate.ejb.EntityManagerImpl.<init>(EntityManagerImpl.java:61)
     at org.hibernate.ejb.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:39)
     at org.hibernate.ejb.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:34)
     at org.jboss.jpa.injection.InjectedEntityManagerFactory.createEntityManager(InjectedEntityManagerFactory.java:82)
     at org.jboss.seam.persistence.ManagedPersistenceContext.initEntityManager(ManagedPersistenceContext.java:78)
     at org.jboss.seam.persistence.ManagedPersistenceContext.getEntityManager(ManagedPersistenceContext.java:107)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
     at java.lang.reflect.Method.invoke(Method.java:597)
     at org.jboss.seam.util.Reflections.invoke(Reflections.java:22)
     at org.jboss.seam.util.Reflections.invokeAndWrap(Reflections.java:144)
     at org.jboss.seam.Component.callComponentMethod(Component.java:2249)
     at org.jboss.seam.Component.unwrap(Component.java:2275)
     at org.jboss.seam.Component.getInstance(Component.java:2041)
     at org.jboss.seam.Component.getInstance(Component.java:1983)
     at org.jboss.seam.Component.getInstance(Component.java:1977)
     at org.jboss.seam.Component.getInstance(Component.java:1972)
     at org.jboss.seam.framework.Controller.getComponentInstance(Controller.java:272)
     at org.jboss.seam.framework.PersistenceController.getPersistenceContext(PersistenceController.java:20)
     at org.jboss.seam.framework.EntityQuery.getEntityManager(EntityQuery.java:159)
     at org.jboss.seam.framework.EntityQuery.validate(EntityQuery.java:39)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
     at java.lang.reflect.Method.invoke(Method.java:597)
     at org.jboss.seam.util.Reflections.invoke(Reflections.java:22)
     at org.jboss.seam.intercept.RootInvocationContext.proceed(RootInvocationContext.java:32)
     at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:56)
     at org.jboss.seam.transaction.RollbackInterceptor.aroundInvoke(RollbackInterceptor.java:28)
     at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
     at org.jboss.seam.transaction.TransactionInterceptor$1.work(TransactionInterceptor.java:97)
     at org.jboss.seam.util.Work.workInTransaction(Work.java:47)
     at org.jboss.seam.transaction.TransactionInterceptor.aroundInvoke(TransactionInterceptor.java:91)
     at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
     at org.jboss.seam.core.MethodContextInterceptor.aroundInvoke(MethodContextInterceptor.java:44)
     at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
     at org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:107)
     at org.jboss.seam.intercept.JavaBeanInterceptor.interceptInvocation(JavaBeanInterceptor.java:185)
     at org.jboss.seam.intercept.JavaBeanInterceptor.invoke(JavaBeanInterceptor.java:103)
     at com.mydomain.open18.action.CourseList_$$_javassist_seam_2.validate(CourseList_$$_javassist_seam_2.java)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
     at java.lang.reflect.Method.invoke(Method.java:597)
     at org.jboss.seam.util.Reflections.invoke(Reflections.java:22)
     at org.jboss.seam.util.Reflections.invokeAndWrap(Reflections.java:144)
     at org.jboss.seam.Component.callComponentMethod(Component.java:2249)
     at org.jboss.seam.Component.callCreateMethod(Component.java:2172)
     at org.jboss.seam.Component.newInstance(Component.java:2132)
     ... 85 more

[metaphysicist]

NullPointerException it seems?

[swd847]

This bit is the problem:

 at org.hibernate.cache.impl.bridge.RegionFactoryCacheProviderBridge.nextTimestamp(RegionFactoryCacheProviderBridge.java:85)

This is to do with the hibernate 2nd level cache (I think), which seems odd considering you do not have it enabled in persistence.xml

[metaphysicist]

Rodrigo Dellacqua might be right. Maybe it's time to give up on seam-gen and start doing stuff manually - unless someone else has the last word?

[rgoytacaz]

Just like my other post, Stuart was the only one that tried to help.

Nobody else cares..

Thx Stuart!

[metaphysicist]

Thanks for the reality check. I wish you well.

[mohamedhimi]

I had struggled this day with this issue.
It seems it has to do with seam 2.2.0 GA in combination with jboss as 4.2.2GA. Seam-gen generates the project, you can deploye it, all goes fine, till you trigger an action in the UI...then you get the entityManager not found issue. I have tried to reverse engineer from H2 and SQL server database, but no difference. I think it's more a jndi lookup issue.

Btw, creating seam project using the jboss tools plug-ins, works fine. But you get a project without ant build preparation.

I discovered that, Seam-gen works fine, when using seam 2.1.2 distribution in combination with jboss as 4.2.2GA.