11:12 p.m.
Hello,
I am a newbie trying to use Spring 2.0 and EJB3 together for a project.
I have EJB3 APIs that work fine when I access them through the JSP, withput the Spring
framework on JBoss 4.2.1.
Now I'm trying to introduce Spring 2.0 to the picture and want the Spring beans to
call my EJB Session beans.
The following is my Jboss-spring.xml file
<?xml version="1.0" encoding="UTF-8"?>
| <beans xmlns="http://www.springframework.org/schema/beans"
| xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
| xmlns:jee="http://www.springframework.org/schema/jee"
| xsi:schemaLocation="http://www.springframework.org/schema/beans
| http://www.springframework.org/schema/beans/spring-beans-2.0.xsd
| http://www.springframework.org/schema/jee
| http://www.springframework.org/schema/jee/spring-jee-2.0.xsd">
|
| <bean id="personstatelessejb"
class="org.springframework.jndi.JndiObjectFactoryBean">
| <property name="jndiName"
value="Lms/PersonStatelessBean/remote" />
| <property name="resourceRef" value="true" />
| </bean>
| <bean id="personSpringBean"
class="com.lms.spring.PersonSpringBean">
| <property name="personStateless"
ref="personstatelessejb" />
| </bean>
| </beans>
|
This is my EJB session bean
package com.lms.ejbs;
|
| import javax.ejb.*;
| import javax.persistence.*;
| import java.util.*;
|
| @Stateless
| public class PersonStatelessBean implements PersonStateless {
| @PersistenceContext(unitName="lmsPU") private EntityManager em;
| public String testBean() {
| return "the server returned this string";
| }
|
| public List<Person> getAllPersons()
| {
| ArrayList<Person> toReturn = new ArrayList();
| Query q = em.createQuery("SELECT o FROM Person o");
| for (Object po : q.getResultList()) {
| toReturn.add((Person) po);
| }
| return toReturn;
| }
| /**validates user and returns true/false
|
|
| @author Vasudha*/
|
| public boolean validateUser(String email, String password) throws
UserNotFoundException
| {
| boolean result = false;
| System.out.println("validateUser() begin");
| Query q = em.createQuery("select person from com.lms.ejbs.Person as person
where person.email = :email and person.password = :password");
| q.setParameter("email",email);
| q.setParameter("password",password);
| try
| {
|
| Person person = (Person)q.getSingleResult();
|
| if(person != null)
| {
| result = true;
| System.out.println("Output from named query");
| System.out.println(person.getFirstName());
| System.out.println(person.getLastName());
|
| em.flush();
| }
| }
| catch(NoResultException nre)
| {
| System.out.println("Invalid Username password ");
| throw new UserNotFoundException("Invalid username and password");
|
| }
| catch(NonUniqueResultException nure)
| {
| System.out.println("Multiple results");
| throw new UserNotFoundException("Invalid username and password");
| }
|
| System.out.println("validateUser() end");
| return result;
|
|
| }
|
| /**retrieves a Person's profile object
|
| @throws UserNotFoundException
| @author Vasudha*/
|
| public Person getPerson(String email) throws UserNotFoundException
| {
| Query q = em.createQuery("select person from com.lms.ejbs.Person as person
where person.email =:email");
| q.setParameter("email",email);
| Person person = null;
| try
| {
| person = (Person)q.getSingleResult();
| }
| catch(NoResultException nre)
| {
| System.out.println("Invalid username ");
| throw new UserNotFoundException("Invalid username");
| }
| catch(NonUniqueResultException nure)
| {
| System.out.println("Multiple results");
| throw new UserNotFoundException("Invalid username");
| }
|
| return person;
| }
|
|
| }
The following is my Spring bean code:
package com.lms.spring;
|
| import java.util.List;
|
| import com.lms.ejbs.Person;
| import com.lms.ejbs.PersonStateless;
|
| public class PersonSpringBean implements IPersonSpring {
|
|
| private PersonStateless personStateless;
| public PersonSpringBean() {
| }
|
| // Setter injection of PersonStatelessEJB
| public void setPersonStateless(PersonStateless personStateless) {
| this.personStateless = personStateless;
| }
|
| public String testBean() {
| return personStateless.testBean();
| }
| public List<Person> getAllPersons() {
| List<Person> lp = null;
| try {
| lp = personStateless.getAllPersons();
| } catch(Exception e) {
| e.printStackTrace();
| }
| return lp;
| }
|
| public boolean validateUser(String email, String password) {
| try {
| return personStateless.validateUser(email, password);
| } catch(Exception e) {
| e.printStackTrace();
| }
| return false;
| }
| public Person getPerson(String email) {
| Person p = null;
| try {
| p = personStateless.getPerson(email);
| } catch(Exception e) {
| e.printStackTrace();
| }
| return p;
| }
| }
|
The following is my servelet code:
package com.lms.web;
|
| import javax.naming.Context;
| import javax.naming.InitialContext;
| import javax.naming.NamingException;
| import javax.servlet.*;
| import javax.servlet.http.*;
|
| import org.springframework.beans.factory.BeanFactory;
| import org.springframework.beans.factory.xml.XmlBeanFactory;
| import org.springframework.core.io.ClassPathResource;
|
| import java.io.*;
| import java.util.List;
|
| import com.lms.ejbs.*;
| import com.lms.spring.PersonSpringBean;
|
|
|
| public class LmsStatelessEJBServlet extends HttpServlet {
|
| private PersonSpringBean statelessBean;
| //private PersonStateless statelessBean;
|
|
| public void init() {
| /*try {
| Context context = new InitialContext();
| statelessBean = (PersonStateless)
context.lookup("PersonStatelessBean/remote");
| } catch (NamingException e) {
| // TODO Auto-generated catch block
| e.printStackTrace();
| }
| */
| try {
| Context context = new InitialContext();
| statelessBean = (PersonSpringBean)
context.lookup("Lmss/personSpringBean");
| System.out.println(statelessBean);
| } catch (NamingException e) {
| // TODO Auto-generated catch block
| e.printStackTrace();
| }
|
|
| // BeanFactory factory =
| // new XmlBeanFactory(new ClassPathResource("jboss-spring.xml"));
| //statelessBean =
| // (PersonSpringBean) factory.getBean("personSpringBean");
| }
|
| public void doPost(HttpServletRequest req, HttpServletResponse resp)
| throws ServletException, IOException {
| doGet(req, resp);
| }
|
| public void doGet(HttpServletRequest req, HttpServletResponse resp)
| throws ServletException, IOException
| {
| PrintWriter writer = resp.getWriter();
| writer.write("The stateless bean returned this string: " +
| statelessBean.testBean());
|
|
|
|
| List<Person> people = statelessBean.getAllPersons();
| for (Person person : people) {
| writer.write("Email retrieved: " + person.getEmail() +
"\n");
| }
| try
| {
| boolean result = statelessBean.validateUser("marzo(a)mail.com",
"fred");
| writer.write("Result: " + result + "\n");
| }
| catch(Exception unfe)
| {
| writer.write("Invalid username/password");
| }
| }
| }
I downloaded the jboss-spring-jdk5.jar. But there is no other associated files available
for download for the latest version. Hence I included the jboss-service.xml from the
previous version. And setup the deployer directory in the deploy folder of Jboss.
I have three different packages that I deploy to the Jboss deploy folder
1)Lms.ejb3 containing
->com.lms.ejbs.ejb3 classes
->META-INF/persistence.xml
->jndi.properties
2)Lmss.jar containing
->spring bean classes,
->META-INF/jboss-spring.xml
->jndi.properties.
3)Lmsw.war containing
->WEB-INF/classes/com.lms.web.LmsStatelessEjbServlet
->web.xml
->WEB-INF/log4j.properties
->jboss-spring.xml
This is the error I get when I run the application:
20:57:25,515 INFO [Server] JBoss (MX MicroKernel) [4.2.1.GA (build: SVNTag=JBos
| s_4_2_1_GA date=200707131605)] Started in 38s:31ms
| 20:57:32,265 ERROR [STDERR] javax.naming.NameNotFoundException: Lmss not bound
| 20:57:32,265 ERROR [STDERR] at org.jnp.server.NamingServer.getBinding(Naming
| Server.java:529)
| 20:57:32,265 ERROR [STDERR] at org.jnp.server.NamingServer.getBinding(Naming
| Server.java:537)
| 20:57:32,265 ERROR [STDERR] at org.jnp.server.NamingServer.getObject(NamingS
| erver.java:543)
| 20:57:32,265 ERROR [STDERR] at org.jnp.server.NamingServer.lookup(NamingServ
| er.java:267)
| 20:57:32,265 ERROR [STDERR] at sun.reflect.NativeMethodAccessorImpl.invoke0(
| Native Method)
| 20:57:32,265 ERROR [STDERR] at sun.reflect.NativeMethodAccessorImpl.invoke(N
| ativeMethodAccessorImpl.java:39)
| 20:57:32,265 ERROR [STDERR] at sun.reflect.DelegatingMethodAccessorImpl.invo
| ke(DelegatingMethodAccessorImpl.java:25)
| 20:57:32,281 ERROR [STDERR] at java.lang.reflect.Method.invoke(Method.java:5
| 85)
| 20:57:32,281 ERROR [STDERR] at sun.rmi.server.UnicastServerRef.dispatch(Unic
| astServerRef.java:294)
| 20:57:32,281 ERROR [STDERR] at sun.rmi.transport.Transport$1.run(Transport.j
| ava:153)
| 20:57:32,281 ERROR [STDERR] at java.security.AccessController.doPrivileged(N
| ative Method)
| 20:57:32,281 ERROR [STDERR] at sun.rmi.transport.Transport.serviceCall(Trans
| port.java:149)
| 20:57:32,281 ERROR [STDERR] at sun.rmi.transport.tcp.TCPTransport.handleMess
| ages(TCPTransport.java:466)
| 20:57:32,281 ERROR [STDERR] at sun.rmi.transport.tcp.TCPTransport$Connection
| Handler.run(TCPTransport.java:707)
| 20:57:32,281 ERROR [STDERR] at java.lang.Thread.run(Thread.java:595)
| 20:57:32,281 ERROR [STDERR] at sun.rmi.transport.StreamRemoteCall.exceptionR
| eceivedFromServer(StreamRemoteCall.java:247)
| 20:57:32,281 ERROR [STDERR] at sun.rmi.transport.StreamRemoteCall.executeCal
| l(StreamRemoteCall.java:223)
| 20:57:32,281 ERROR [STDERR] at sun.rmi.server.UnicastRef.invoke(UnicastRef.j
| ava:126)
| 20:57:32,281 ERROR [STDERR] at org.jnp.server.NamingServer_Stub.lookup(Unkno
| wn Source)
| 20:57:32,281 ERROR [STDERR] at org.jnp.interfaces.NamingContext.lookup(Namin
| gContext.java:627)
| 20:57:32,281 ERROR [STDERR] at org.jnp.interfaces.NamingContext.lookup(Namin
| gContext.java:589)
| 20:57:32,281 ERROR [STDERR] at javax.naming.InitialContext.lookup(InitialCon
| text.java:351)
| 20:57:32,281 ERROR [STDERR] at com.lms.web.LmsStatelessEJBServlet.init(LmsSt
| atelessEJBServlet.java:38)
| 20:57:32,281 ERROR [STDERR] at javax.servlet.GenericServlet.init(GenericServ
| let.java:212)
| 20:57:32,281 ERROR [STDERR] at org.apache.catalina.core.StandardWrapper.load
| Servlet(StandardWrapper.java:1161)
| 20:57:32,281 ERROR [STDERR] at org.apache.catalina.core.StandardWrapper.allo
| cate(StandardWrapper.java:806)
| 20:57:32,281 ERROR [STDERR] at org.apache.catalina.core.StandardWrapperValve
| .invoke(StandardWrapperValve.java:129)
| 20:57:32,281 ERROR [STDERR] at org.apache.catalina.core.StandardContextValve
| .invoke(StandardContextValve.java:175)
| 20:57:32,281 ERROR [STDERR] at org.jboss.web.tomcat.security.SecurityAssocia
| tionValve.invoke(SecurityAssociationValve.java:179)
| 20:57:32,281 ERROR [STDERR] at org.jboss.web.tomcat.security.JaccContextValv
| e.invoke(JaccContextValve.java:84)
| 20:57:32,281 ERROR [STDERR] at org.apache.catalina.core.StandardHostValve.in
| voke(StandardHostValve.java:128)
| 20:57:32,281 ERROR [STDERR] at org.apache.catalina.valves.ErrorReportValve.i
| nvoke(ErrorReportValve.java:104)
| 20:57:32,281 ERROR [STDERR] at org.jboss.web.tomcat.service.jca.CachedConnec
| tionValve.invoke(CachedConnectionValve.java:157)
| 20:57:32,281 ERROR [STDERR] at org.apache.catalina.core.StandardEngineValve.
| invoke(StandardEngineValve.java:109)
| 20:57:32,281 ERROR [STDERR] at org.apache.catalina.connector.CoyoteAdapter.s
| ervice(CoyoteAdapter.java:241)
| 20:57:32,281 ERROR [STDERR] at org.apache.coyote.http11.Http11Processor.proc
| ess(Http11Processor.java:844)
| 20:57:32,281 ERROR [STDERR] at org.apache.coyote.http11.Http11Protocol$Http1
| 1ConnectionHandler.process(Http11Protocol.java:580)
| 20:57:32,281 ERROR [STDERR] at org.apache.tomcat.util.net.JIoEndpoint$Worker
| .run(JIoEndpoint.java:447)
| 20:57:32,281 ERROR [STDERR] at java.lang.Thread.run(Thread.java:595)
| 20:57:32,312 ERROR [[LmsStatelessEJBServlet]] Servlet.service() for servlet LmsS
| tatelessEJBServlet threw exception
| java.lang.NullPointerException
| at com.lms.web.LmsStatelessEJBServlet.doGet(LmsStatelessEJBServlet.java:
| 62)
| at javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
| at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
| at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
| icationFilterChain.java:290)
| at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
| ilterChain.java:206)
| at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFi
| lter.java:96)
| at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
| icationFilterChain.java:235)
| at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
| ilterChain.java:206)
| at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperV
| alve.java:230)
| at org.apache.catalina.core.StandardContextValve.invoke(StandardContextV
| alve.java:175)
| at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(Securit
| yAssociationValve.java:179)
| at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValv
| e.java:84)
| at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.j
| ava:128)
| at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.j
| ava:104)
| at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedC
| onnectionValve.java:157)
| at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineVal
| ve.java:109)
| at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.jav
| a:241)
| at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java
| :844)
| at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.proce
| ss(Http11Protocol.java:580)
| at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:44
| 7)
| at java.lang.Thread.run(Thread.java:595)
|
|
|
|
| Can somebody please point out where I am wrong and throw some light on how to go about
this?
|
|
| Thanks,
| Vasudha
|
|
|
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