// EJB 3.0 Style business interfaces
// Each of these interfaces are already annotated in the classes
// themselves with @Remote and @Local, so annotating them here
// in the bean class again is not really required.
@Remote({FriendlyPersonRemote.class})
@Local({FriendlyPersonLocal.class})

// EJB 2.1 Style component interfaces
// These interfaces, however, must be annotated here in the bean class.
// Use of @RemoteHome in the FriendlyPersonEjbHome class itself is not allowed.
// Use of @LocalHome in the FriendlyPersonEjbLocalHome class itself is also not allowed.
@RemoteHome(FriendlyPersonEjbHome.class)
@LocalHome(FriendlyPersonEjbLocalHome.class)

@Stateful(name="FriendlyPerson")
public class FriendlyPersonImpl implements FriendlyPersonLocal, FriendlyPersonRemote {

    private final HashMap<String, MessageFormat> greetings;
    private final Properties languagePreferences;

    private String defaultLanguage;

    public FriendlyPersonImpl() {
        greetings = new HashMap();
        languagePreferences = new Properties();
        defaultLanguage = Locale.getDefault().getLanguage();

        addGreeting("en", "Hello {0}!");
        addGreeting("es", "Hola {0}!");
        addGreeting("fr", "Bonjour {0}!");
        addGreeting("pl", "Witaj {0}!");
    }

    /**
     * This method corresponds to the FriendlyPersonEjbHome.create() method
     * and the FriendlyPersonEjbLocalHome.create()
     *
     * If you do not have an EJBHome or EJBLocalHome interface, this method
     * can be deleted.
     */
    @Init
    public void create(){}

    /**
     * This method corresponds to the following methods:
     *  - EJBObject.remove()
     *  - EJBHome.remove(ejbObject)
     *  - EJBLocalObject.remove()
     *  - EJBLocalHome.remove(ejbObject)
     *
     * If you do not have an EJBHome or EJBLocalHome interface, this method
     * can be deleted.
     */
    @Remove
    public void remove(){}

    public String greet(String friend) {
        String language = languagePreferences.getProperty(friend, defaultLanguage);
        return greet(language, friend);
    }

    public String greet(String language, String friend) {
        MessageFormat greeting = greetings.get(language);
        if (greeting == null) {
            Locale locale = new Locale(language);
            return "Sorry, I don't speak " + locale.getDisplayLanguage() + ".";
        }

        return greeting.format(new Object[]{friend});
    }

    public void addGreeting(String language, String message) {
        greetings.put(language, new MessageFormat(message));
    }

    public void setLanguagePreferences(String friend, String language) {
        languagePreferences.put(friend, language);
    }

    public String getDefaultLanguage() {
        return defaultLanguage;
    }

    public void setDefaultLanguage(String defaultLanguage) {
        this.defaultLanguage = defaultLanguage;
    }
}

import javax.ejb.CreateException;
import javax.ejb.EJBHome;
import java.rmi.RemoteException;

public interface FriendlyPersonEjbHome extends EJBHome {
    FriendlyPersonEjbObject create() throws CreateException, RemoteException;
}

import javax.ejb.EJBObject;
import java.rmi.RemoteException;

public interface FriendlyPersonEjbObject extends EJBObject {
    String greet(String friend) throws RemoteException;

    String greet(String language, String friend)  throws RemoteException;

    void addGreeting(String language, String message) throws RemoteException;

    void setLanguagePreferences(String friend, String language) throws RemoteException;

    String getDefaultLanguage() throws RemoteException;

    void setDefaultLanguage(String defaultLanguage) throws RemoteException;

}

public void testEjbHomeAndEjbObject() throws Exception {
    Object object = initialContext.lookup("FriendlyPersonRemoteHome");
    FriendlyPersonEjbHome home = (FriendlyPersonEjbHome) object;
    FriendlyPersonEjbObject friendlyPerson = home.create();

    friendlyPerson.setDefaultLanguage("en");

    assertEquals("Hello David!", friendlyPerson.greet("David"));
    assertEquals("Hello Amelia!", friendlyPerson.greet("Amelia"));

    friendlyPerson.setLanguagePreferences("Amelia", "es");

    assertEquals("Hello David!", friendlyPerson.greet("David"));
    assertEquals("Hola Amelia!", friendlyPerson.greet("Amelia"));

    // Amelia took some French, let's see if she remembers
    assertEquals("Bonjour Amelia!", friendlyPerson.greet("fr", "Amelia"));

    // Dave should take some Polish and if he had, he could say Hi in Polish
    assertEquals("Witaj Dave!", friendlyPerson.greet("pl", "Dave"));

    // Let's see if I speak Portuguese
    assertEquals("Sorry, I don't speak " + new Locale("pt").getDisplayLanguage() + ".", friendlyPerson.greet("pt", "David"));

    // Ok, well I've been meaning to learn, so...
    friendlyPerson.addGreeting("pt", "Ola {0}!");

    assertEquals("Ola David!", friendlyPerson.greet("pt", "David"));
}