Seam, problem with EntityManager

[grdzeli_kaci]

hi all,
i have template using facelets, i have left menu and body pages, both of them has session beans, in the left menu bean i have generated richfaces HtmlPanelBarItem component, for leftmenu, in the body page i have richfaces tree componet generated from it's bean. all works fine i see PanelBar components in the left menu page and tree component on the body page, but then i tried to expand tree i got an exception, that in the left menu bean entitymanager is null :(, here is my example:
1.faces-config.xml

 <managed-bean>
 <managed-bean-name>library</managed-bean-name> <managed-bean-class>com.liliko.billing.businesslayer.beans.common.Library</managed-bean-class>
 <managed-bean-scope>request</managed-bean-scope>
 </managed-bean>

 <managed-bean>
 <managed-bean-name>menu</managed-bean-name> <managed-bean-class>com.liliko.billing.businesslayer.beans.common.MenuBean</managed-bean-class>
 <managed-bean-scope>session</managed-bean-scope>
 </managed-bean>

2. MenuBean.java

@Name("menu")
@Scope(ScopeType.SESSION)
public class MenuBean {

 @In(value="#{entityManager}")
 private EntityManager entityManager;
 ............................................

3. Library.java (body)

@Name("library")
@Scope(ScopeType.PAGE)
public class Library implements TreeNode {

 @In(value="#{entityManager}")
 private EntityManager entityManager;
..................................

exception occured when i tried to expand tree :(, why is the entitymanager null on this time ?
error trace:

Caused by: org.jboss.seam.RequiredException: In attribute requires non-null value: menu.#{entityManager}
 at org.jboss.seam.Component.getValueToInject(Component.java:1923)
 at org.jboss.seam.Component.injectAttributes(Component.java:1372)
 at org.jboss.seam.Component.inject(Component.java:1203)

_________________
Regards,
Paata

[hispeedsurfer]

if you have the following in components.xml

<core:managed-persistence-context name="entityManager"
 auto-create="true"
 persistence-unit-jndi-name="java:/TestEntityManagerFactory"/>

you can use

@In(create=true)
 private EntityManager entityManager;

But one question. Why you have managed-bean stuff in faces-config.xml?
This should be handelt from your annotations in your bean, I think!

[g00se24]

You don't need

@In(create=true)
EntityManager entityManager;

@In should be sufficent

Greets

[grdzeli_kaci]

"g00se24" wrote:
You don't need

@In(create=true)
EntityManager entityManager;

@In should be sufficent

Greets

HI ALL,
Thank you very much for your posts, i tried everything but myu problem still appears,
problem is not on first time, i see tabpane and tree component generated from database, all works fine but when i tried to expand tree than an exception occured,


i did not understand what happend :(, why got entitymanager null ?


________________
Regards,
Paata

[grdzeli_kaci]

if i remove generate tabpane from database and set simple string, everuthing works fine, tree also work.

[grdzeli_kaci]

can anybody help me ?

[lowecg2004]

Have you got an entry in persistence.xml that corresponds to your entity manager factory?

components.xml

 <core:managed-persistence-context name="entityManager"
 auto-create="true"
 persistence-unit-jndi-name="java:/dvdEntityManagerFactory"/>


persistence.xml
<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="dvdDatabase">
 <provider>org.hibernate.ejb.HibernatePersistence</provider>
 <jta-data-source>java:/dvdDatasource</jta-data-source>
 <properties>
 <property name="hibernate.hbm2ddl.auto" value="create-drop"/>
 <property name="hibernate.cache.use_query_cache" value="true"/>
 <property name="hibernate.show_sql" value="true"/>

 <property name="hibernate.cache.provider_class"
 value="org.hibernate.cache.HashtableCacheProvider"/>

 <!-- use a file system based index -->
 <property name="hibernate.search.default.directory_provider"
 value="org.hibernate.search.store.FSDirectoryProvider"/>
 <!-- directory where the indexes will be stored -->
 <property name="hibernate.search.default.indexBase" value="./dvdindexes"/>
 <!-- Not needed with HA 3.3 -->
 <property name="hibernate.ejb.event.post-insert" value="org.hibernate.search.event.FullTextIndexEventListener"/>
 <property name="hibernate.ejb.event.post-update" value="org.hibernate.search.event.FullTextIndexEventListener"/>
 <property name="hibernate.ejb.event.post-delete" value="org.hibernate.search.event.FullTextIndexEventListener"/>

 <property name="jboss.entity.manager.factory.jndi.name"
 value="java:/dvdEntityManagerFactory" />
 </properties>
 </persistence-unit>
</persistence>

One other potential trap is that I have just upgraded from Seam 1.2.1 to 2.0b1 and "managed-persistence-context" has been moved from namespace core to persistence. If this is the case, then don't forget to add the persistence namespace to your XML namespace config:

xmlns:persistence="http://jboss.com/products/seam/persistence"

<persistence:managed-persistence-context name="entityManager"
auto-create="true"
persistence-unit-jndi-name="java:/dvdEntityManagerFactory" />

See DVD store example for complete code.

[jkoops]

One other potential trap is that I have just upgraded from Seam 1.2.1 to 2.0b1 and "managed-persistence-context" has been moved from namespace core to persistence. If this is the case, then don't forget to add the persistence namespace to your XML namespace config:

xmlns:persistence="http://jboss.com/products/seam/persistence"

<persistence:managed-persistence-context name="entityManager"
auto-create="true"
persistence-unit-jndi-name="java:/dvdEntityManagerFactory" />

Please add this to the seam2migration.txt, I spent one day on this.

[grdzeli_kaci]

hi lowecg2004,
first of all thank you for your post, i tried all versions of seam and jboss application server,
is this so difficult that use seam and richfaces together ???
i already tried this for a week but could not resolve :(
environment :

1. JBoss AS 4.2.0GA
2. Seam 2.0.0.BETA1
3. Richfaces 3.0.1
4.ajax4jsf 1.1.1



here is my example simple dynamic tree generation into seam component :
1.MenuBean.java (Seam Component)

@Name("menu")
@Scope(ScopeType.SESSION)
public class MenuBean{

 @In
 private EntityManager entityManager;

 private HtmlPanelBar bar = new HtmlPanelBar();
 public MenuBean() {
 }

 public HtmlPanelBar getBar() {
 if (bar!=null && bar.getChildren()!=null) {
 bar.getChildren().clear();
 }

 ArrayList<Menu> arraylist = (ArrayList<Menu>)entityManager.createNamedQuery("Menu.findAll").getResultList();
 for (Menu elem : arraylist) {
 HtmlPanelBarItem item= new HtmlPanelBarItem();
 item.setLabel("Blaaaa");

 Library library = new Library();
 HtmlTree tree = new HtmlTree();
 tree.setStyle("width:150px");
 tree.setValue(library.getData());
 tree.setVar("item");
 tree.setNodeFace(library.getType());


 Iterator<Artist> itArtists = library.getArtists().values().iterator();
 while (itArtists.hasNext()) {
 Artist artist = (Artist)itArtists.next();

 HtmlTreeNode artistNode = new HtmlTreeNode();
 artistNode.setType("artist");
 HtmlOutputText artistText = new HtmlOutputText();
 artistText.setValue(artist.getName());

 Iterator<Album> itAlbums = artist.getAlbums();
 while (itAlbums.hasNext()) {
 Album album = (Album) itAlbums.next();

 HtmlTreeNode albumNode = new HtmlTreeNode();
 albumNode.setType("album");
 HtmlOutputText albumText = new HtmlOutputText();
 albumText.setValue(album.getTitle());

 Iterator<Song> itSongs = album.getSongs();
 while (itSongs.hasNext()) {
 Song song = (Song) itSongs.next();

 HtmlTreeNode songNode = new HtmlTreeNode();
 songNode.setType("song");
 HtmlOutputText songText = new HtmlOutputText();
 songText.setValue(song.getTitle());

 tree.getChildren().add(songNode);
 }
 tree.getChildren().add(albumNode);
 tree.getChildren().add(artistNode);
 item.getChildren().add(tree);
 bar.getChildren().add(item);
 }
 }
 }
 return bar;
 }
 public void setBar(HtmlPanelBar bar) {
 this.bar = bar;
 }
}

1.Home.xhtml (Presentation Layer)

 <ui:define name="body">

 <h:messages globalOnly="true" styleClass="message"/>
 <h:form id="bodyForm">
 <rich:panel>
 <f:facet name="header">Welcome!</f:facet>
 <p>This empty shell application includes:</p>
 <ul>
 <li>Ant build script</li>
 <li>Deployment to JBoss AS</li>
 <li>Integration testing using TestNG and JBoss Embeddable EJB3</li>
 <li>EJB 3.0 Seam components</li>
 <li>Templated Facelets views</li>
 <li>HSQL (or MySQL) Datasource</li>
 <li>Default CSS stylesheet</li>
 <li>Internationalization support</li>
 </ul>
 <rich:panelBar binding="#{menu.bar}" width="500" height="600">
 </rich:panelBar>
 </rich:panel>
 </h:form>
 </ui:define>

i always get this error :

Caused by: org.jboss.seam.RequiredException: In attribute requires non-null value: menu.entityManager
 at org.jboss.seam.Component.getValueToInject(Component.java:2042)
 at org.jboss.seam.Component.injectAttributes(Component.java:1481)
 at org.jboss.seam.Component.inject(Component.java:1302)

i tried to find something into seam code but i could not find anything for this issue,
you told me about configurations lowecg200, here is my configurations :

1.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:security="http://jboss.com/products/seam/security"
 xmlns:mail="http://jboss.com/products/seam/mail"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xsi:schemaLocation=
 "http://jboss.com/products/seam/core http://jboss.com/products/seam/core-2.0.xsd
 http://jboss.com/products/seam/persistence http://jboss.com/products/seam/persistence-2.0.xsd
 http://jboss.com/products/seam/drools http://jboss.com/products/seam/drools-2.0.xsd
 http://jboss.com/products/seam/security http://jboss.com/products/seam/security-2.0.xsd
 http://jboss.com/products/seam/mail http://jboss.com/products/seam/mail-2.0.xsd
 http://jboss.com/products/seam/components http://jboss.com/products/seam/components-2.0.xsd">

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

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


 <persistence:managed-persistence-context name="entityManager"
 auto-create="true"
 persistence-unit-jndi-name="java:/NewBillingEntityManagerFactory"/>

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

 <security:identity authenticate-method="#{authenticator.authenticate}"
 security-rules="#{securityRules}"/>

 <event type="org.jboss.seam.notLoggedIn">
 <action expression="#{redirect.captureCurrentView}"/>
 </event>
 <event type="org.jboss.seam.postAuthenticate">
 <action expression="#{redirect.returnToCapturedView}"/>
 </event>
 <mail:mail-session host="localhost" port="2525" username="test" password="test" />
</components>

here is managed-persistence-context defined
2.persistence.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="NewBilling">
 <provider>org.hibernate.ejb.HibernatePersistence</provider>
 <jta-data-source>java:/NewBillingDatasource</jta-data-source>
 <properties>
 <property name="hibernate.hbm2ddl.auto" value="validate"/>
 <property name="hibernate.cache.use_query_cache" value="true"/>
 <property name="hibernate.show_sql" value="true"/>
 <property name="hibernate.cache.provider_class" value="org.hibernate.cache.HashtableCacheProvider"/>

 <!-- use a file system based index -->
 <property name="hibernate.search.default.directory_provider"
 value="org.hibernate.search.store.FSDirectoryProvider"/>
 <!-- directory where the indexes will be stored -->
 <property name="hibernate.search.default.indexBase" value="./dvdindexes"/>
 <!-- Not needed with HA 3.3 -->
 <property name="hibernate.ejb.event.post-insert" value="org.hibernate.search.event.FullTextIndexEventListener"/>
 <property name="hibernate.ejb.event.post-update" value="org.hibernate.search.event.FullTextIndexEventListener"/>
 <property name="hibernate.ejb.event.post-delete" value="org.hibernate.search.event.FullTextIndexEventListener"/>


 <property name="jboss.entity.manager.factory.jndi.name" value="java:/NewBillingEntityManagerFactory"/>

 <property name="hibernate.default_schema" value="JITS"/>
 </properties>
 </persistence-unit>
</persistence>

also here is jndi.name defined correctly.
i also saw dvd example and i could not find difference into configurations.

have you ever tried to use richfaces and seam together ??

and i have one another question also, if i have one ejb interface and seam components which is also bean for component (for example richfaces treenode bean) how i can call ejb component ?? @EJB does not work, i like separated logic : business layer - presentation layer, how i can call ejb component ?


Any idea will be appreciated.

________________________
Regards,
Paata.

[lowecg2004]

Hello Paata,

Your code and persistence.xml/components.xml config look okay to me. Do you have an entry in your startup logs that looks like the following?

16:53:36,554 INFO [Component] Component: entityManager, scope: CONVERSATION, type: JAVA_BEAN, class: org.jboss.seam.persistence.ManagedPersistenceContext

If your entityManager was successfully created then you'll have an entry like the one above. Otherwise, you'll not. This will at least tell us if there is a config issue or not.

Have you still got the managed-bean config from your original post hanging around?

I'm using RichFaces without any problems.

As for your EJB3 question - I don't know the answer to this, hopefully someone else can help you here. Maybe you could try making your Seam POJO into a SFSB? As a SFSB you could also try @PersistenceContext for getting at your entityManager?

Could you post your web.xml and faces-config.xml?

Regards,

Chris.

[grdzeli_kaci]

HI lowecg2004, i saw log and i found this :

04:03:56,515 INFO [Component] Component: org.jboss.seam.core.init, scope: APPLICATION, type: JAVA_BEAN, class: org.jboss.seam.core.Init
04:03:56,559 INFO [Initialization] Installing components...
04:03:56,593 INFO [Component] Component: authenticator, scope: EVENT, type: JAVA_BEAN, class: action.com.liliko.billing.businesslayer.beans.session.Authenticator
04:03:56,635 INFO [Component] Component: entityManager, scope: CONVERSATION, type: JAVA_BEAN, class: org.jboss.seam.persistence.ManagedPersistenceContext
04:03:56,653 INFO [Component] Component: menu, scope: SESSION, type: JAVA_BEAN, class: model.MenuBean

entity manager exist,
here is my web.xml :

<?xml version="1.0" ?>
<web-app 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"
 version="2.4">

 <!-- Ajax4jsf -->

 <context-param>
 <param-name>org.ajax4jsf.VIEW_HANDLERS</param-name>
 <param-value>com.sun.facelets.FaceletViewHandler</param-value>
 </context-param>

 <context-param>
 <param-name>org.ajax4jsf.SKIN</param-name>
 <param-value>blueSky</param-value>
 </context-param>

 <!-- Seam -->

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

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

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

 <servlet>
 <servlet-name>Seam Resource Servlet</servlet-name>
 <servlet-class>org.jboss.seam.servlet.ResourceServlet</servlet-class>
 </servlet>

 <servlet-mapping>
 <servlet-name>Seam Resource Servlet</servlet-name>
 <url-pattern>/seam/resource/*</url-pattern>
 </servlet-mapping>

 <!-- Facelets development mode (disable in production) -->

 <context-param>
 <param-name>facelets.DEVELOPMENT</param-name>
 <param-value>true</param-value>
 </context-param>

 <!-- JSF -->

 <context-param>
 <param-name>javax.faces.DEFAULT_SUFFIX</param-name>
 <param-value>.xhtml</param-value>
 </context-param>

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

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

 <security-constraint>
 <display-name>Restrict raw XHTML Documents</display-name>
 <web-resource-collection>
 <web-resource-name>XHTML</web-resource-name>
 <url-pattern>*.xhtml</url-pattern>
 </web-resource-collection>
 <auth-constraint>
 <role-name>NONE</role-name>
 </auth-constraint>
 </security-constraint>

</web-app>

and my faces-config.xml

<?xml version='1.0' encoding='UTF-8'?>
<faces-config version="1.2"
 xmlns="http://java.sun.com/xml/ns/javaee"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-facesconfig_1_2.xsd">

 <application>
 <locale-config>
 <default-locale>en</default-locale>
 <supported-locale>en</supported-locale>
 <supported-locale>ka</supported-locale>
 <supported-locale>de</supported-locale>
 <supported-locale>fr</supported-locale>
 </locale-config>
 <message-bundle>messages</message-bundle>
 </application>

 <application>
 <view-handler>com.sun.facelets.FaceletViewHandler</view-handler>
 </application>
</faces-config>

is this configuration files incorrect ?
i use seam gen fro project creation, i don't understand why this not working :(


_____________
Regards,
Paata

[grdzeli_kaci]

this files identical with dvd example files,
why this is not working :(,

[grdzeli_kaci]

i found example which load data from xml file, i use seam 2.0 beta version and richfaces with ajax4jsf, here is another problem, i tried to load xml file into seam component like this :

InputSource ins1 = new InputSource(getClass().getResourceAsStream("data.xml"));
Digester digester = new Digester();
 Rule rule = new Rule();
 final List rulesList = new ArrayList(1);
 rulesList.add(rule);

 RulesBase rulesBase = new RulesBase() {
 protected List lookup(String namespace, String name) {
 return rulesList;
 }
 };
 digester.setRules(rulesBase);
 digester.setNamespaceAware(true);
 digester.parse(ins1);

but i got an error :

java.net.MalformedURLException

i have this fine into my ejb jar file, but i can't read it :(
is there any incorrect ?


__________________
Regards,
Paata.

[jrodri]

grdzeli_kaci:

Could you fix the problem?

Could you post the code fixed

Regards


Jaime

[mickknutson]

"jrodri" wrote:

grdzeli_kaci:

Could you fix the problem?

Could you post the code fixed

Regards


Jaime

Any update you can post here please?