hi there,
i am new to Jboss - development with seam and have problems with my first
Database - project :
I generated a SeamWebProject by Jboss Tools for Eclipse and ReverseEngineered a
Database into the Seam - Project, e.g. the Class ArticleHome :
/ Generated 13.08.2008 15:14:13 by Hibernate Tools 3.2.2.GA
import javax.ejb.Stateless;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
/**
* Home object for domain model class Article.
* @see de.medint.webshop.Article
* @author Hibernate Tools
*/
@Stateless
public class ArticleHome {
private static final Log log = LogFactory.getLog(ArticleHome.class);
@PersistenceContext
private EntityManager entityManager;
public void persist(Article transientInstance) {
log.debug("persisting Article instance");
try {
entityManager.persist(transientInstance);
log.debug("persist successful");
} catch (RuntimeException re) {
log.error("persist failed", re);
throw re;
}
}
}
The components.xml looks as follows :
<?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: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/bpm
http://jboss.com/products/seam/bpm-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="true" jndi-pattern="@jndiPattern@"/>
<core:manager concurrent-request-timeout="500"
conversation-timeout="120000"
conversation-id-parameter="cid"
parent-conversation-id-parameter="pid"/>
<persistence:managed-persistence-context name="entityManager"
auto-create="true"
persistence-unit-jndi-name="java:/webshopEntityManagerFactory"/>
<drools:rule-base name="securityRules">
<drools:rule-files>
/security.drl
</drools:rule-files>
</drools:rule-base>
<security:identity security-rules="#{securityRules}"
authenticate-method="#{authenticator.authenticate}" remember-me="true"/>
<mail:mail-session host="localhost" port="2525" username="test"
password="test" />
<!-- For use with jBPM pageflow or process management -->
<!--
<bpm:jbpm>
<bpm:process-definitions></bpm:process-definitions>
<bpm:pageflow-definitions></bpm:pageflow-definitions>
</bpm:jbpm>
-->
Heres the 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="webshop">
org.hibernate.ejb.HibernatePersistence
<jta-data-source>java:/webshopDatasource</jta-data-source>
</persistence-unit>
Using a function of ArticleHome i get a NullPointer on Entitymanager...
whats wrong - can somebody help?
thnx
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