1 - First Try

src/subscriber/Datenmodell1.java

+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+
+package subscriber;
+
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.Flow.Subscriber;
+import java.util.concurrent.SubmissionPublisher;
+
+/**
+ *
+ * @author le
+ */
+public class Datenmodell1 implements Runnable
+{
+  private int faktor;
+  private int wert;
+  public boolean active;
+  private volatile boolean laufend;
+  private SubmissionPublisher<Integer> iPublisher;
+  private ExecutorService eService;
+  
+  public Datenmodell1()
+  {
+    faktor = 10;
+    wert = 1;
+    laufend = false;
+    iPublisher = new SubmissionPublisher<>();
+    eService = Executors.newSingleThreadExecutor();
+    laufend = true;
+    eService.submit(this);
+    
+    active = false; 
+  }
+  
+  public void start(){
+    active = true;
+  }
+  
+  public void stop()
+  {
+    active = false;
+  }
+  
+  public void addWertSubscription(Subscriber<Integer> subscriber)
+  {
+    iPublisher.subscribe(subscriber);
+  }
+
+  @Override
+  public void run()
+  {
+    while (laufend)
+    {
+      try
+      {
+        Thread.sleep(5);
+      }
+      catch (Exception e)
+      {
+        System.err.println(e);
+      }
+      wert = calculateWert();
+      System.out.println(wert); // just for displaying that the thread is running
+      if (active){
+        iPublisher.submit(wert);      
+      }
+    }
+  }
+  
+  public int calculateWert(){
+    return (int)(Math.random()*6) + 1;
+  }
+}

src/subscriber/Datenmodell2.java

+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+
+package subscriber;
+
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.Flow.Subscriber;
+import java.util.concurrent.SubmissionPublisher;
+
+/**
+ *
+ * @author le
+ */
+public class Datenmodell2 implements Runnable
+{
+  private int faktor;
+  private int wert;
+  private volatile boolean laufend;
+  private SubmissionPublisher<Integer> iPublisher;
+  private ExecutorService eService;
+  
+  public Datenmodell2()
+  {
+    faktor = 10;
+    wert = 1;
+    laufend = false;
+    iPublisher = new SubmissionPublisher<>();
+    eService = Executors.newSingleThreadExecutor(); 
+  }
+  
+  public void start()
+  {
+    laufend = true;
+    eService.submit(this);
+  }
+  
+  public void stop()
+  {
+    laufend = false;
+  }
+  
+  public void addWertSubscription(Subscriber<Integer> subscriber)
+  {
+    iPublisher.subscribe(subscriber);
+  }
+
+  @Override
+  public void run()
+  {
+    while (laufend)
+    {
+      try
+      {
+        Thread.sleep(5);
+      }
+      catch (Exception e)
+      {
+        System.err.println(e);
+      }
+      wert = calculateWert();
+      System.out.println(wert); // just for displaying that the thread is running
+      iPublisher.submit(wert);      
+    }
+  }
+  
+  public int calculateWert(){
+    return (int)(Math.random()*6) + 1;
+  }
+}

src/subscriber/Start.java

+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+
+package subscriber;
+
+import javax.swing.JOptionPane;
+import javax.swing.UIManager;
+
+/**
+ * Builder Class
+ * @author le
+ */
+public class Start
+{
+  public Start()
+  {
+    Datenmodell3 model = new Datenmodell3();
+    SubscriberView view = new SubscriberView();
+    StartStopController controller = new StartStopController(view, model);
+    WertAdapter wAdapter = new WertAdapter(view, model);
+    controller.registerEvents();
+    wAdapter.einschreiben();
+    view.setVisible(true);
+  }
+
+  /**
+   * @param args the command line arguments
+   */
+  public static void main(String[] args) 
+  {
+    try
+    {
+      UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
+    }
+    catch (Exception ex)
+    {
+      JOptionPane.showMessageDialog(null, ex.toString());
+    }
+    new Start();
+  }
+}

src/subscriber/StartStopController.java

+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+
+package subscriber;
+
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+
+/**
+ *
+ * @author le
+ */
+public class StartStopController implements ActionListener
+{
+  private SubscriberView view;
+  private Datenmodell3 model;
+  
+  public StartStopController(SubscriberView view, Datenmodell3 model)
+  {
+    this.view = view;
+    this.model = model;
+  }
+  
+  public void registerEvents()
+  {
+    view.getBtnStart().addActionListener(this);
+    view.getBtnStop().addActionListener(this);
+  }
+
+  @Override
+  public void actionPerformed(ActionEvent evt)
+  {
+    if (evt.getSource() == view.getBtnStart())
+    {
+      model.start();
+    }
+    else
+    {
+      model.stop();
+    }
+  }
+}

src/subscriber/SubscriberView.form

+<?xml version="1.0" encoding="UTF-8" ?>
+
+<Form version="1.3" maxVersion="1.9" type="org.netbeans.modules.form.forminfo.JFrameFormInfo">
+  <Properties>
+    <Property name="defaultCloseOperation" type="int" value="3"/>
+  </Properties>
+  <SyntheticProperties>
+    <SyntheticProperty name="formSize" type="java.awt.Dimension" value="-84,-19,0,5,115,114,0,18,106,97,118,97,46,97,119,116,46,68,105,109,101,110,115,105,111,110,65,-114,-39,-41,-84,95,68,20,2,0,2,73,0,6,104,101,105,103,104,116,73,0,5,119,105,100,116,104,120,112,0,0,1,38,0,0,1,109"/>
+    <SyntheticProperty name="formSizePolicy" type="int" value="0"/>
+    <SyntheticProperty name="generateSize" type="boolean" value="true"/>
+    <SyntheticProperty name="generateCenter" type="boolean" value="true"/>
+  </SyntheticProperties>
+  <AuxValues>
+    <AuxValue name="FormSettings_autoResourcing" type="java.lang.Integer" value="0"/>
+    <AuxValue name="FormSettings_autoSetComponentName" type="java.lang.Boolean" value="false"/>
+    <AuxValue name="FormSettings_generateFQN" type="java.lang.Boolean" value="true"/>
+    <AuxValue name="FormSettings_generateMnemonicsCode" type="java.lang.Boolean" value="false"/>
+    <AuxValue name="FormSettings_i18nAutoMode" type="java.lang.Boolean" value="false"/>
+    <AuxValue name="FormSettings_layoutCodeTarget" type="java.lang.Integer" value="1"/>
+    <AuxValue name="FormSettings_listenerGenerationStyle" type="java.lang.Integer" value="0"/>
+    <AuxValue name="FormSettings_variablesLocal" type="java.lang.Boolean" value="false"/>
+    <AuxValue name="FormSettings_variablesModifier" type="java.lang.Integer" value="2"/>
+  </AuxValues>
+
+  <Layout class="org.netbeans.modules.form.compat2.layouts.DesignBorderLayout"/>
+  <SubComponents>
+    <Container class="javax.swing.JPanel" name="jPanel1">
+      <Constraints>
+        <Constraint layoutClass="org.netbeans.modules.form.compat2.layouts.DesignBorderLayout" value="org.netbeans.modules.form.compat2.layouts.DesignBorderLayout$BorderConstraintsDescription">
+          <BorderConstraints direction="First"/>
+        </Constraint>
+      </Constraints>
+
+      <Layout class="org.netbeans.modules.form.compat2.layouts.DesignFlowLayout"/>
+      <SubComponents>
+        <Component class="javax.swing.JButton" name="btnStart">
+          <Properties>
+            <Property name="text" type="java.lang.String" value="Start"/>
+          </Properties>
+        </Component>
+        <Component class="javax.swing.JButton" name="btnStop">
+          <Properties>
+            <Property name="text" type="java.lang.String" value="Stopp"/>
+          </Properties>
+        </Component>
+      </SubComponents>
+    </Container>
+    <Component class="javax.swing.JLabel" name="lblZahl">
+      <Properties>
+        <Property name="font" type="java.awt.Font" editor="org.netbeans.beaninfo.editors.FontEditor">
+          <Font name="Ubuntu" size="60" style="0"/>
+        </Property>
+        <Property name="horizontalAlignment" type="int" value="0"/>
+        <Property name="text" type="java.lang.String" value="1"/>
+      </Properties>
+      <Constraints>
+        <Constraint layoutClass="org.netbeans.modules.form.compat2.layouts.DesignBorderLayout" value="org.netbeans.modules.form.compat2.layouts.DesignBorderLayout$BorderConstraintsDescription">
+          <BorderConstraints direction="Center"/>
+        </Constraint>
+      </Constraints>
+    </Component>
+  </SubComponents>
+</Form>

src/subscriber/SubscriberView.java

+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+package subscriber;
+
+/**
+ *
+ * @author le
+ */
+public class SubscriberView extends javax.swing.JFrame
+{
+  /**
+   * @return the btnStart
+   */
+  public javax.swing.JButton getBtnStart()
+  {
+    return btnStart;
+  }
+
+  /**
+   * @return the btnStop
+   */
+  public javax.swing.JButton getBtnStop()
+  {
+    return btnStop;
+  }
+
+  /**
+   * @return the lblZahl
+   */
+  public javax.swing.JLabel getLblZahl()
+  {
+    return lblZahl;
+  }
+
+  /**
+   * Creates new form SubscriberView
+   */
+  public SubscriberView()
+  {
+    initComponents();
+  }
+
+  /**
+   * This method is called from within the constructor to initialize the form.
+   * WARNING: Do NOT modify this code. The content of this method is always
+   * regenerated by the Form Editor.
+   */
+  @SuppressWarnings("unchecked")
+  // <editor-fold defaultstate="collapsed" desc="Generated Code">//GEN-BEGIN:initComponents
+  private void initComponents()
+  {
+
+    jPanel1 = new javax.swing.JPanel();
+    btnStart = new javax.swing.JButton();
+    btnStop = new javax.swing.JButton();
+    lblZahl = new javax.swing.JLabel();
+
+    setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
+
+    btnStart.setText("Start");
+    jPanel1.add(btnStart);
+
+    btnStop.setText("Stopp");
+    jPanel1.add(btnStop);
+
+    getContentPane().add(jPanel1, java.awt.BorderLayout.PAGE_START);
+
+    lblZahl.setFont(new java.awt.Font("Ubuntu", 0, 60)); // NOI18N
+    lblZahl.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
+    lblZahl.setText("1");
+    getContentPane().add(lblZahl, java.awt.BorderLayout.CENTER);
+
+    setSize(new java.awt.Dimension(365, 294));
+    setLocationRelativeTo(null);
+  }// </editor-fold>//GEN-END:initComponents
+
+  /**
+   * @param args the command line arguments
+   */
+  public static void main(String args[])
+  {
+    /* Set the Nimbus look and feel */
+    //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
+    /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
+         * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html 
+     */
+    try
+    {
+      for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels())
+      {
+        if ("Nimbus".equals(info.getName()))
+        {
+          javax.swing.UIManager.setLookAndFeel(info.getClassName());
+          break;
+        }
+      }
+    }
+    catch (ClassNotFoundException ex)
+    {
+      java.util.logging.Logger.getLogger(SubscriberView.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
+    }
+    catch (InstantiationException ex)
+    {
+      java.util.logging.Logger.getLogger(SubscriberView.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
+    }
+    catch (IllegalAccessException ex)
+    {
+      java.util.logging.Logger.getLogger(SubscriberView.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
+    }
+    catch (javax.swing.UnsupportedLookAndFeelException ex)
+    {
+      java.util.logging.Logger.getLogger(SubscriberView.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
+    }
+    //</editor-fold>
+
+    /* Create and display the form */
+    java.awt.EventQueue.invokeLater(new Runnable()
+    {
+      public void run()
+      {
+        new SubscriberView().setVisible(true);
+      }
+    });
+  }
+
+  // Variables declaration - do not modify//GEN-BEGIN:variables
+  private javax.swing.JButton btnStart;
+  private javax.swing.JButton btnStop;
+  private javax.swing.JPanel jPanel1;
+  private javax.swing.JLabel lblZahl;
+  // End of variables declaration//GEN-END:variables
+}

src/subscriber/WertAdapter.java

+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+
+package subscriber;
+
+import java.util.concurrent.Flow.Subscriber;
+import java.util.concurrent.Flow.Subscription;
+
+/**
+ *
+ * @author le
+ */
+public class WertAdapter implements Subscriber<Integer>
+{
+  private SubscriberView view;
+  private Datenmodell3 model;
+  private Subscription subscription;
+  
+  public WertAdapter(SubscriberView view, Datenmodell3 model)
+  {
+    this.view = view;
+    this.model = model;
+  }
+  
+  public void einschreiben()
+  {
+    model.addWertSubscription(this);
+  }
+
+  @Override
+  public void onSubscribe(Subscription subscription)
+  {
+    this.subscription = subscription;
+    subscription.request(1);
+  }
+
+  @Override
+  public void onNext(Integer item)
+  {
+    view.getLblZahl().setText(String.valueOf(item));
+    subscription.request(1);
+  }
+
+  @Override
+  public void onError(Throwable throwable)
+  {
+  }
+
+  @Override
+  public void onComplete()
+  {
+  }
+
+ 
+}