关于 jms：Java MessageDriven Beans 问题

Java MessageDriven Beans Issue

我需要帮助解决此类问题：

Exception attempting to inject Unresolved Message-Destination-Ref web.News/[email protected]@null into class web.News: Lookup failed for 'java:comp/env/web.News/queue' in SerialContext[myEnv={java.naming.factory.initial=com.sun.enterprise.naming.impl.SerialInitContextFactory, java.naming.factory.state=com.sun.corba.ee.impl.presentation.rmi.JNDIStateFactoryImpl, java.naming.factory.url.pkgs=com.sun.enterprise.naming}

这是我的实体类

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package ejb;

import java.io.Serializable;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;

/**
*
* @author Maciej1
*/
@Entity
public class NewsItem implements Serializable {

private String heading;
private String body;

private static final long serialVersionUID = 1L;
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private Long id;

public Long getId() {
return id;
}

public void setId(Long id) {
this.id = id;
}

@Override
public int hashCode() {
int hash = 0;
hash += (id != null ? id.hashCode() : 0);
return hash;
}

@Override
public boolean equals(Object object) {
// TODO: Warning - this method won't work in the case the id fields are not set
if (!(object instanceof NewsItem)) {
return false;
}
NewsItem other = (NewsItem) object;
if ((this.id == null && other.id != null) || (this.id != null && !this.id.equals(other.id))) {
return false;
}
return true;
}

@Override
public String toString() {
return"ejb.NewsItem[ id=" + id +" ]";
}

/**
* @return the heading
*/
public String getHeading() {
return heading;
}

/**
* @param heading the heading to set
*/
public void setHeading(String heading) {
this.heading = heading;
}

/**
* @return the body
*/
public String getBody() {
return body;
}

/**
* @param body the body to set
*/
public void setBody(String body) {
this.body = body;
}
}

这是我的消息驱动 Beans 类：

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package ejb;

import javax.ejb.ActivationConfigProperty;
import javax.ejb.MessageDriven;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.MessageListener;
import javax.jms.ObjectMessage;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;

/**
*
* @author Maciej1
*/
@MessageDriven(mappedName ="jms/NewsQueue", activationConfig = {
@ActivationConfigProperty(propertyName ="destinationType", propertyValue ="javax.jms.Queue")
})
public class NewsMDB implements MessageListener {

@PersistenceContext(unitName ="MDBLabPU")
private EntityManager em;

public NewsMDB() {
}

@Override
public void onMessage(Message message) {

ObjectMessage msg = null;
try {
if (message instanceof ObjectMessage) {
msg = (ObjectMessage) message;
NewsItem e = (NewsItem) msg.getObject();
saveObject(e);
}
} catch (JMSException e) {
e.printStackTrace();
}
}

public void saveObject(Object object) {
em.persist(object);
}

}

最后我的班级与JavaServer Faces进行通信：

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package web;

import ejb.NewsItem;
import ejb.NewsItemFacadeLocal;
import java.util.List;
import javax.annotation.Resource;
import javax.ejb.EJB;
import javax.enterprise.context.RequestScoped;
import javax.inject.Named;
import javax.jms.Connection;
import javax.jms.ConnectionFactory;
import javax.jms.JMSException;
import javax.jms.MessageProducer;
import javax.jms.ObjectMessage;
import javax.jms.Session;

/**
*
* @author Maciej1
*/
@Named
@RequestScoped
public class News {

@EJB
private NewsItemFacadeLocal newsItemFacade;
@Resource(lookup="java:comp/DefaultJMSConnectionFactory")
private ConnectionFactory connectionFactory;
@Resource(lookup="jms/NewsQueue")
private javax.jms.Queue queue;

private String headingText ="headingText";
private String bodyText ="bodyText";

void sendNewsItem(String heading, String body)
{
try {
Connection connection = connectionFactory.createConnection();
Session session;
session = connection.createSession(true, 0);
MessageProducer messageProducer = session.createProducer(queue);
ObjectMessage message = session.createObjectMessage();
NewsItem e = new NewsItem();
e.setHeading(heading);
e.setBody(body);
message.setObject(e);
messageProducer.send(message);
messageProducer.close();
connection.close();
} catch (JMSException
ex) {
ex.printStackTrace();
}
}

public List<NewsItem> getNewsItems()
{
return newsItemFacade.findAll();
}

public String submitNews(){
sendNewsItem(getHeadingText(), getBodyText());
return null;
}

你能帮我解决这个问题吗？