[jboss-user] [EJB 3.0] - EntityManager Injection, Null Pointer Exception. (Sorry...)

I wanted the entitymanager have been injected by the container. But after a lot of trial, I decided to ask the question. Here is the situation, JBoss Server:jboss-4.2.2.GA My ear file structure: | surgeonfish.ear | |----surgeonfish-ds.xml | |----META-INF | |----application.xml | |----jboss-app.xml | |----MANIFEST.MF | |----surgeonfish.jar | |----com.beans... | |----META-INF | |----persistence.xml | |----MANIFEST.MF | |----surgeonfish.war | |----META-INF | |----MANIFEST.MF | |----WEB-INF | |----classes | |----lib | |----web.xml | ---------------- HERE ARE MY CONFIG FILES: ---------------- surgeonfish-ds.xml: | <?xml version="1.0" encoding="UTF-8"?> | <datasources> | <local-tx-datasource> | <jndi-name>time_reporting_data_source</jndi-name> | <connection-url>jdbc:mysql://localhost:3306/timereporting</connection-url> | <driver-class>com.mysql.jdbc.Driver</driver-class> | <user-name>root</user-name> | <password>test</password> | <exception-sorter-class-name>org.jboss.resource.adapter.jdbc.vendor.MySQLExceptionSorter</exception-sorter-class-name> | <metadata> | <type-mapping>mySQL</type-mapping> | </metadata> | </local-tx-datasource> | </datasources> | ---------------- application.xml | <application> | <display-name>Surgeonfish</display-name> | <module> | <web> | <web-uri>surgeonfish.war</web-uri> | <context-root>/surgeonfish</context-root> | </web> | </module> | <module> | <ejb>surgeonfish.jar</ejb> | </module> | </application> | --------------- jboss-app.xml: | <jboss-app> | <module> | <service>surgeonfish-ds.xml</service> | </module> | <loader-repository> | surgeonfish:archive=surgeonfish.ear | </loader-repository> | </jboss-app> | -------------- | persistence.xml: | <persistence> | <persistence-unit name="time_report_persistence_context"> | <provider>org.hibernate.ejb.HibernatePersistence</provider> | <jta-data-source>java:/time_reporting_data_source</jta-data-source> | <jar-file>../surgeonfish.jar</jar-file> | <properties> | <property name="hibernate.hbm2ddl.auto" value="create-drop"/> | <property name="hibernate.show_sql" value="true"/> | <property name="dialect">org.hibernate.dialect.MySQLDialect</property> | <property name="hibernate.transaction.manager_lookup_class" value="org.hibernate.transaction.JBossTransactionManagerLookup"/> | </properties> | </persistence-unit> | </persistence> | ---------------------- Here my test bean: | package com.xyz...; | | | import javax.ejb.Local; | import javax.ejb.Stateless; | import javax.persistence.EntityManager; | import javax.persistence.EntityManagerFactory; | import javax.persistence.Persistence; | import javax.persistence.PersistenceContext; | import org.apache.commons.logging.Log; | import org.apache.commons.logging.LogFactory; | | @Stateless | @Local(value=PrStaffInterface.class) | public class PrStaffHome { | | private static final Log log = LogFactory.getLog(PrStaffHome.class); | | @PersistenceContext(unitName="time_report_persistence_context") | private EntityManager entityManager; | | public PrStaff findById(Integer id) { | log.debug("getting PrStaff instance with id: " + id); | try { | /* | EntityManagerFactory emf = Persistence.createEntityManagerFactory("time_report_persistence_context"); | EntityManager em = emf.createEntityManager(); | PrStaff instance1 = em.find(PrStaff.class, id); | ---this lines working without any error...--- | */ | | PrStaff instance = entityManager.find(PrStaff.class, id);->I am taking null pointer exception here... | System.out.println("instance:"+instance); | log.debug("get successful"); | return instance; | } catch (RuntimeException re) { | log.error("get failed", re); | throw re; | } | } | } | I cant find reason, why container is not injecting the entity manager. Of course I am missing something but I cant find. Thanks for your helps... View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4158700#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...