Mise à jour d'une interface graphique après avoir reçu de nouvelles données de la requête http

Question

Je veux créer un petit outil pour surveiller mon favori Let's Player Gronkh.

ce que j'ai jusqu'à présent:

Une classe principale:

public class mainClass { 
    public static void main(final String[] args) throws Exception { 
     // final String url = "https://api.twitch.tv/kraken/streams/gronkh/"; 

     // final workerClass w = new workerClass(url); 
     gronkhGui.launch(); 

     // String URL = "http://eu.battle.net/api/d3/profile/tortoc-2624/"; 
     // final String bNetString = d3AccInfo.request.sendGet(URL); 
     // System.out.println(bNetString); 

    } 
} 

A Gui:

public class gronkhGui extends JFrame { 

    public gronkhGui() { 
     getContentPane().setLayout(
       new FormLayout(new ColumnSpec[] { 
         FormFactory.RELATED_GAP_COLSPEC, 
         FormFactory.DEFAULT_COLSPEC, 
         FormFactory.RELATED_GAP_COLSPEC, 
         FormFactory.DEFAULT_COLSPEC, 
         FormFactory.RELATED_GAP_COLSPEC, 
         FormFactory.DEFAULT_COLSPEC, }, new RowSpec[] { 
         FormFactory.RELATED_GAP_ROWSPEC, 
         FormFactory.DEFAULT_ROWSPEC, 
         FormFactory.RELATED_GAP_ROWSPEC, 
         FormFactory.DEFAULT_ROWSPEC, 
         FormFactory.RELATED_GAP_ROWSPEC, 
         FormFactory.DEFAULT_ROWSPEC, 
         FormFactory.RELATED_GAP_ROWSPEC, 
         FormFactory.DEFAULT_ROWSPEC, 
         FormFactory.RELATED_GAP_ROWSPEC, 
         FormFactory.DEFAULT_ROWSPEC, 
         FormFactory.RELATED_GAP_ROWSPEC, 
         FormFactory.DEFAULT_ROWSPEC, 
         FormFactory.RELATED_GAP_ROWSPEC, 
         FormFactory.DEFAULT_ROWSPEC, 
         FormFactory.RELATED_GAP_ROWSPEC, 
         FormFactory.DEFAULT_ROWSPEC, 
         FormFactory.RELATED_GAP_ROWSPEC, 
         FormFactory.DEFAULT_ROWSPEC, })); 

     final JLabel textLabel = new JLabel("Gronkh ist: "); 
     textLabel.setFont(new Font("Calibri", Font.PLAIN, 14)); 
     getContentPane().add(textLabel, "6, 2"); 

     final JLabel stateLabel = new JLabel(""); 
     stateLabel.setFont(new Font("Calibri", Font.PLAIN, 30)); 
     getContentPane().add(stateLabel, "6, 6"); 

     final JLabel gameLabel = new JLabel(""); 
     getContentPane().add(gameLabel, "6, 10"); 

     final JLabel gameLabelText = new JLabel(""); 
     getContentPane().add(gameLabelText, "6, 12"); 

     final JLabel viewerLabel = new JLabel(""); 
     getContentPane().add(viewerLabel, "6, 16"); 

     final JLabel viewerLabelText = new JLabel(""); 
     getContentPane().add(viewerLabelText, "6, 18"); 

     final String url = "https://api.twitch.tv/kraken/streams/gronkh/"; 

     final workerClass w = new workerClass(url); 
     if (w.state.equals("OFFLINE")) { 
      stateLabel.setText(w.state); 
      gameLabel.setText(""); 
      gameLabelText.setText(""); 
      viewerLabel.setText(""); 
      viewerLabelText.setText(""); 
      getContentPane().setBackground(Color.red); 
     } else { 
      stateLabel.setText(w.state); 
      gameLabel.setText("Gronkh spielt:"); 
      gameLabelText.setText(w.game); 
      viewerLabel.setText("Zuschauer:"); 
      viewerLabelText.setText(w.viewers); 
      getContentPane().setBackground(Color.green); 
     } 
    } 

    public static void launch() { 
     final gronkhGui gui = new gronkhGui(); 
     gui.setVisible(true); 
     gui.setBounds(400, 200, 170, 304); 
    } 

} 

Une classe ouvrière:

public class workerClass { 

    public String state; 
    public String game; 
    public String viewers; 
    public String name; 

    public workerClass(final String url) { 
     String request = ""; 

     try { 
      request = gronkhInfo.request.sendGet(url); 
     } catch (final Exception e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
     } 
     if (!request.contains("\"stream\":null")) { 
      this.state = "ONLINE"; 
      this.game = request.substring(request.indexOf("game\" : \"") + 8, 
        request.indexOf("\",\"viewers")); 
      this.viewers = request.substring(
        request.indexOf("viewers\": ") + 10, 
        request.indexOf(",\"created_at")); 
      this.name = request.substring(
        request.indexOf("display_name\": \"") + 16, 
        request.indexOf("\",\"game")); 

     } else { 
      this.state = "OFFLINE"; 
     } 
    } 
} 

Une classe de demande:

public class request { 
    public final static String USER_AGENT = "Mozilla/5.0"; 

    public static String sendGet(final String url) throws Exception { 

     final URL obj = new URL(url); 
     final HttpURLConnection con = (HttpURLConnection) obj.openConnection(); 
     con.setRequestMethod("GET"); 
     con.setRequestProperty("User-Agent", USER_AGENT); 
     final BufferedReader in = new BufferedReader(new InputStreamReader(
       con.getInputStream())); 
     String inputLine; 
     final StringBuffer response = new StringBuffer(); 

     while ((inputLine = in.readLine()) != null) { 
      response.append(inputLine); 
     } 
     in.close(); 

     final String respo = response.toString(); 
     return respo; 

    } 
} 

Ce que je veux maintenant faire est de mettre à jour le Gui par exemple toutes les 30 secondes. Cela signifie que je dois à nouveau faire une requête http, puis renouveler l'interface graphique.

Comment puis-je faire cela?

Answer 1

Vous pouvez définir workerClass comme fil Runnable et vous pourriez exécuter toutes les 30 secondes en utilisant comme exécuteur ScheduledThreadPool:

ScheduledExecutorService sevice = Executors.newScheduledThreadPool(1); 
sevice.schedule(new workerClass(), 30, TimeUnit.SECONDS); 

Et vous pourriez dire avec GUI informer nouvelle chaîne créée de workerClass.