Problème appel de methode entre projet Web et projet EJB
Bonjour,
J'ai un soucis de communication entre mon Projet Web(JSF) et mon Projet EJB. Lors de l'appel , coté web, d'une méthode coté EJB, l'objet passé en paramètre est apparemment "null".
Du côté EJB :
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| package com.ejb.IEJBSession;
import java.util.List;
import javax.ejb.Local;
import javax.ejb.Remote;
import com.ejb.entities.Wine;
@Local
public interface IWineSession {
public void add(Wine wine);
public void delete(Wine wine);
public List<Wine> showListOfWines();
} |
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| package com.ejb.EJBSession;
import java.util.List;
import javax.ejb.Stateless;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.persistence.Query;
import com.ejb.IEJBSession.IWineSession;
import com.ejb.entities.Wine;
@Stateless
public class WineSession implements IWineSession {
@PersistenceContext(unitName="WineCaveEJB")
private EntityManager em;
public void add(Wine wine) {
// TODO Auto-generated method stub
em.persist(wine);
}
public void delete(Wine wine){
wine = em.merge(wine);
em.remove(wine);
}
public List<Wine> showListOfWines() {
// TODO Auto-generated method stub
Query query = em.createNamedQuery("wineList");
List<Wine> wineList = query.getResultList();
return wineList;
}
} |
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| package com.ejb.entities;
import java.io.Serializable;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.NamedQueries;
import javax.persistence.NamedQuery;
@Entity
@NamedQueries({
@NamedQuery(name ="wineList", query = "SELECT w from Wine w")
})
public class Wine implements Serializable{
private static final long serialVersionUID = -4335426208843293310L;
@Id
private Integer id;
private String name;
public Wine(){};
public Wine(Integer id, String name){
this.id=id;
this.name=name;
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
} |
Coté client j'ai mon managed bean que je souhaite tester :
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| package com.bean;
import javax.ejb.EJB;
import com.ejb.EJBSession.WineSession;
import com.ejb.IEJBSession.IWineSession;
import com.ejb.entities.Wine;
public class WineBean {
@EJB
private IWineSession wineSession;
Wine currentWine;
public WineBean(){setCurrentWine(new Wine());}
public String addWine(){
Wine wine = new Wine(1,"Bordeaux");
wineSession.add(wine);
System.out.println("Vin ajouté");
return "addedWine";
}
public Wine getCurrentWine(){
return currentWine;
}
public void setCurrentWine(Wine wine){
this.currentWine=wine;
}
} |
Quand j'exécute le projet, j'ai une erreur quand il appelle la methode wineSession.addWine(wine)
Voici l'erreur :
Citation:
java.lang.NullPointerException
at com.bean.WineBean.addWine(WineBean.java:40)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.apache.el.parser.AstValue.invoke(AstValue.java:170)
at org.apache.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:276)
at org.apache.jasper.el.JspMethodExpression.invoke(JspMethodExpression.java:68)
at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:88)
at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:102)
at javax.faces.component.UICommand.broadcast(UICommand.java:387)
at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:475)
at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:756)
at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:82)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:100)
at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:265)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:235)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:190)
at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:92)
at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.process(SecurityContextEstablishmentValve.java:126)
at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.invoke(SecurityContextEstablishmentValve.java:70)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:158)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:330)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:829)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:598)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Unknown Source)
Apparemment l'objet Wine ne passe pas d'un projet à l'autre.
Merci d'avance pour votre aide.
