在不同应用程序中从jsf再次调用远程EJB3 bean-未设置委托

Question

我在从JSF托管Bean调用远程ejb的第二次时遇到一个奇怪的异常。 第一次调用bean时，结果将返回到屏幕。 但是，如果我再单击一次第二次调用ejb的操作，则会收到以下异常：

 SystemErr     R java.rmi.RemoteException: CORBA BAD_OPERATION 0x0 No; nested exception is: 
    org.omg.CORBA.BAD_OPERATION: The delegate has not been set!  vmcid: 0x0  minor code: 0  completed: No
[10/06/13 09:35:26:341 BST] 00000041 SystemErr     R    at com.ibm.CORBA.iiop.UtilDelegateImpl.mapSystemException(UtilDelegateImpl.java:330)
[10/06/13 09:35:26:341 BST] 00000041 SystemErr     R    at javax.rmi.CORBA.Util.mapSystemException(Util.java:84)
[10/06/13 09:35:26:341 BST] 00000041 SystemErr     R    at com.ibm.CORBA.iiop.UtilDelegateImpl.isLocal(UtilDelegateImpl.java:739)
[10/06/13 09:35:26:341 BST] 00000041 SystemErr     R    at javax.rmi.CORBA.Util.isLocal(Util.java:281)
[10/06/13 09:35:26:341 BST] 00000041 SystemErr     R    at com.ejb.view._BelgianBeerSessionBeanRemote_Stub.getAllBeveragesForCountry(_BelgianBeerSessionBeanRemote_Stub.java)
[10/06/13 09:35:26:341 BST] 00000041 SystemErr     R    at com.web.BeerStorePageBean.getBeersForCountry(BeerStorePageBean.java:64)

有谁知道这是为什么，以及我需要做些什么来解决它？

EJB和jsf位于单独的Web应用程序中。 ejb接口和jta实体位于每个应用程序内的jar文件中。 就像我之前说过的，第一次检索国家列表的调用成功返回，但是第二次获得一个国家的啤酒的调用返回了以下异常：

这是我的托管Bean。

@ManagedBean
@ViewScoped
public class BeerStorePageBean implements Serializable {

    private static final long serialVersionUID = -303245258622324227L;
    @EJB(lookup = "java:global/BelgianBeersEarProject/BelgianBeersEJBProject/BelgianBeerSessionBean!com.ejb.view.BelgianBeerSessionBeanRemote")
    private BelgianBeerSessionBeanRemote store;
    private List<Beverage> beverages = null;

    public List<Beverage> getBeverages() {
        return beverages;
    }

    public void setBeverages(List<Beverage> beverages) {
        this.beverages = beverages;
    }

    public BelgianBeerSessionBeanRemote getStore() {
        return store;
    }

    public void setStore(BelgianBeerSessionBeanRemote store) {
        this.store = store;
    }

    private List<Country> countries = null;

    @PostConstruct
    public void populateCountries() {
        countries = store.getAllCountries();

    }

    public List<Country> getAllCountries() {

        return countries;
    }

    public void getBeersForCountry(Country c) {

        try {
            setBeverages(getStore().getAllBeveragesForCountry(c.getId()));
        } catch (Exception e) {
            e.printStackTrace();
            FacesContext.getCurrentInstance().addMessage(
                    null,
                    new FacesMessage("There was an error getting the beers: "
                            + e.getMessage()));
        }

    }



}

这是我的EJB：

@Stateless
public class BelgianBeerSessionBean implements BelgianBeerSessionBeanRemote,
        BelgianBeerSessionBeanLocal {

    private static final long serialVersionUID = 7878013037900683879L;
    @PersistenceContext(unitName = "BeerJPAProject")
    private EntityManager em;

    public BelgianBeerSessionBean() {
        // TODO Auto-generated constructor stub
    }

    @TransactionAttribute(TransactionAttributeType.NOT_SUPPORTED)
    public List<Country> getAllCountries() {

        TypedQuery<Country> q = em.createNamedQuery("getCountries",
                Country.class);
        return q.getResultList();
    }

    @TransactionAttribute(TransactionAttributeType.REQUIRED)
    public void saveCountries(List<Country> countries) {
        for (Country c : countries) {
            em.persist(c);
        }

    }

    @Override
    @TransactionAttribute(TransactionAttributeType.NOT_SUPPORTED)
    public List<Beverage> getAllBeveragesForCountry(int countryId) {
        TypedQuery<Beverage> q = em.createNamedQuery("getBeveragesByCountry",
                Beverage.class);
        q.setParameter("countryId", countryId);
        return q.getResultList();
    }
}

这是ejb接口

public interface BelgianBeerSessionInterface extends Serializable {
    List<Country> getAllCountries();

    void saveCountries(List<Country> countries);

    List<Beverage> getAllBeveragesForCountry(int countryId);
}


@Remote
public interface BelgianBeerSessionBeanRemote extends
        BelgianBeerSessionInterface, Serializable{

}

@Local
public interface BelgianBeerSessionBeanLocal extends
        BelgianBeerSessionInterface {

}

Answer 1

我相信这是由PM61337解决的 ，该问题解决了与JSF状态反序列化有关的各种问题。 APAR中的异常表明本地EJB代理未正确序列化，而您的问题是远程EJB代理/存根的反序列化不正确。