Wuerfel/src/wuerfel/controller/WertAdapter.java

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package wuerfel.controller;

import java.util.concurrent.Flow;
import java.util.concurrent.Flow.Subscriber;
import java.util.concurrent.Flow.Subscription;
import javax.swing.JOptionPane;
import wuerfel.model.WuerfelModel;
import wuerfel.view.WuerfelView;

/**
 *
 * @author leo
 */
public class WertAdapter implements Subscriber<Integer>
{
    private WuerfelView view;
    private WuerfelModel model;
    private Subscription subscription;
    
    public WertAdapter(WuerfelView view, WuerfelModel model)
    {
        this.view = view;
        this.model = model;
    }
    
    public void einschreiben()
    {
        model.addWertSubscription(this);
    }

    @Override
    public void onSubscribe(Flow.Subscription subscription)
    {
        this.subscription = subscription;           // wird bei onNext und onError gebraucht
        subscription.request(1);                    // 1 Wert bekommen
    }

    @Override
    public void onNext(Integer item)
    {
        String strWert = String.valueOf(item);      // Wert in String umwandeln
        view.getLblWert().setText(strWert);
        
        subscription.request(1);                // für nächsten Wert anmelden
    }

    @Override
    public void onError(Throwable throwable)
    {
        JOptionPane.showMessageDialog(view, throwable.toString());
    }

    @Override
    public void onComplete()                    // Fertig
    {
        
    }
    
}