Moved client side disconnection handling to this branch and reimplemented it with develop functionality.

#refactor #issue[47]

src/main/java/seng302/visualiser/ClientToServerThread.java

@@ -5,7 +5,6 @@ import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
 import java.net.Socket;
-import java.time.LocalDateTime;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
@@ -15,10 +14,6 @@ import java.util.TimerTask;
 import java.util.concurrent.ConcurrentLinkedQueue;
 import java.util.zip.CRC32;
 import java.util.zip.Checksum;
-import javafx.application.Platform;
-import javafx.scene.control.Alert;
-import javafx.scene.control.Alert.AlertType;
-import javafx.scene.control.ButtonType;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import seng302.gameServer.messages.BoatAction;
@@ -46,16 +41,20 @@ public class ClientToServerThread implements Runnable {
         void newPacket();
     }
 
+    @FunctionalInterface
+    public interface DisconnectedFromHostListener {
+        void notifYDisconnection (String message);
+    }
+
     private class ByteReadException extends Exception {
         private ByteReadException(String message) {
             super(message);
         }
     }
 
-    private static final int LOG_LEVEL = 1;
-
     private Queue<StreamPacket> streamPackets = new ConcurrentLinkedQueue<>();
     private List<ClientSocketListener> listeners = new ArrayList<>();
+    private List<DisconnectedFromHostListener> disconnectionListeners = new ArrayList<>();
     private Thread thread;
 
     private Socket socket;
@@ -72,7 +71,6 @@ public class ClientToServerThread implements Runnable {
 
     private int clientId = -1;
 
-//    private Boolean updateClient = true;
     private ByteArrayOutputStream crcBuffer;
     private boolean socketOpen = true;
 
@@ -99,20 +97,6 @@ public class ClientToServerThread implements Runnable {
         thread.start();
     }
 
-    /**
-     * Prints out log messages and the time happened.
-     * Only perform task if log level is below LOG_LEVEL variable.
-     *
-     * @param message a string of message to be printed out
-     * @param logLevel an int for log level
-     */
-    static void clientLog(String message, int logLevel) {
-        if (logLevel <= LOG_LEVEL) {
-            System.out.println(
-                "[CLIENT " + LocalDateTime.now().toLocalTime().toString() + "] " + message);
-        }
-    }
-
     /**
      * Perform the thread loop. It exits the loop if ClientState connected to host
      * variable is false.
@@ -121,7 +105,7 @@ public class ClientToServerThread implements Runnable {
         int sync1;
         int sync2;
         // TODO: 14/07/17 wmu16 - Work out how to fix this while loop
-        while(socketOpen) {
+        while(!socket.isClosed() && socket.isConnected() && socketOpen) {
             try {
                 crcBuffer = new ByteArrayOutputStream();
                 sync1 = readByte();
@@ -153,26 +137,25 @@ public class ClientToServerThread implements Runnable {
                             }
                         }
                     } else {
-                        clientLog("Packet has been dropped", 1);
+                        logger.warn("Packet has been dropped", 1);
                     }
                 }
             } catch (ByteReadException e) {
-                e.printStackTrace();
+                logger.warn("Byte read exception on ClientToServerThread", 1);
                 closeSocket();
-                Platform.runLater(() -> {
+                notifyDisconnectListeners("Connection to server was interrupted");
-                    Alert alert = new Alert(AlertType.ERROR);
-                    alert.setHeaderText("Host has disconnected");
-                    alert.setContentText("Cannot find Server");
-                    alert.showAndWait();
-                });
-                clientLog(e.getMessage(), 1);
-                return;
             }
         }
+        logger.warn("Closed connection to server", 1);
         closeSocket();
-        clientLog("Closed connection to Server", 0);
+        notifyDisconnectListeners("Connection to server was terminated");
     }
 
+    private void notifyDisconnectListeners (String message) {
+        for (DisconnectedFromHostListener listener : disconnectionListeners) {
+            listener.notifYDisconnection(message);
+        }
+    }
 
     /**
      * Sends a request to the server asking for a source ID
@@ -184,7 +167,8 @@ public class ClientToServerThread implements Runnable {
             os.write(requestMessage.getBuffer());
         } catch (IOException e) {
             logger.error("Could not send registration request. Exiting");
-            System.exit(1);
+            closeSocket();
+            notifyDisconnectListeners("Failed to register with server");
         }
     }
 
@@ -200,7 +184,6 @@ public class ClientToServerThread implements Runnable {
 
         if (status.equals(RegistrationResponseStatus.SUCCESS_PLAYING)){
             clientId = sourceId;
-
             return;
         }
 
@@ -214,11 +197,8 @@ public class ClientToServerThread implements Runnable {
         else{
             alertErrorText = "Could not connect to server";
         }
-
+        closeSocket();
-        Platform.runLater(() -> {
+        notifyDisconnectListeners(alertErrorText);
-            new Alert(AlertType.ERROR, alertErrorText, ButtonType.OK).showAndWait();
-            System.exit(1);
-        });
     }
 
     /**
@@ -228,7 +208,7 @@ public class ClientToServerThread implements Runnable {
      * - MAINTAIN_HEADING = DOWNWIND and UPWIND packets stop being sent.
      * @param actionType The boat action that will dictate packets sent.
      */
-    public void sendBoatAction(BoatAction actionType) {
+    public void sendBoatActionMessage(BoatAction actionType) {
         switch (actionType) {
             case MAINTAIN_HEADING:
                 if (upwindTimerFlag) {
@@ -249,7 +229,7 @@ public class ClientToServerThread implements Runnable {
                         new TimerTask() {
                             @Override
                             public void run() {
-                                sendBoatAction(new BoatActionMessage(BoatAction.DOWNWIND));
+                                sendBoatActionMessage(new BoatActionMessage(BoatAction.DOWNWIND));
                             }
                         }, 0, PACKET_SENDING_INTERVAL_MS
                     );
@@ -262,14 +242,14 @@ public class ClientToServerThread implements Runnable {
                         new TimerTask() {
                             @Override
                             public void run() {
-                                sendBoatAction(new BoatActionMessage(BoatAction.UPWIND));
+                                sendBoatActionMessage(new BoatActionMessage(BoatAction.UPWIND));
                             }
                         }, 0, PACKET_SENDING_INTERVAL_MS
                     );
                 }
                 break;
             default:
-                sendBoatAction(new BoatActionMessage(actionType));
+                sendBoatActionMessage(new BoatActionMessage(actionType));
                 break;
         }
     }
@@ -287,12 +267,14 @@ public class ClientToServerThread implements Runnable {
      * Sends a boat action of the given message type.
      * @param message The given message type.
      */
-    private void sendBoatAction(BoatActionMessage message) {
+    private void sendBoatActionMessage(BoatActionMessage message) {
         if (clientId != -1) {
             try {
                 os.write(message.getBuffer());
             } catch (IOException e) {
-                clientLog("Could not write to server", 1);
+                logger.warn("IOException on attempting to sendBoatActionMessage from Client");
+                closeSocket();
+                notifyDisconnectListeners("Cannot communicate with server");
             }
         }
     }
@@ -301,7 +283,7 @@ public class ClientToServerThread implements Runnable {
         try {
             socket.close();
         } catch (IOException e) {
-            clientLog("Failed to close the socket", 1);
+            logger.warn("IOException on attempting to close ClientToServerSocket");
         }
     }
 
@@ -321,13 +303,23 @@ public class ClientToServerThread implements Runnable {
         listeners.remove(streamListener);
     }
 
+    public void addDisconnectionListener (DisconnectedFromHostListener listener) {
+        disconnectionListeners.add(listener);
+    }
+
+    public void removeDisconnectionListener (DisconnectedFromHostListener listener) {
+        disconnectionListeners.remove(listener);
+    }
+
     private int readByte() throws ByteReadException {
         int currentByte = -1;
         try {
             currentByte = is.read();
             crcBuffer.write(currentByte);
         } catch (IOException e) {
-            clientLog("Read byte failed", 1);
+            logger.warn("IOException on readByte Client side", 1);
+            closeSocket();
+            notifyDisconnectListeners("Cannot read from server.");
         }
         if (currentByte == -1) {
             throw new ByteReadException("InputStream reach end of stream");
@@ -349,8 +341,7 @@ public class ClientToServerThread implements Runnable {
         }
     }
 
-    public int getClientId () {
+    int getClientId () {
         return clientId;
     }
-
 }

src/main/java/seng302/visualiser/GameClient.java

@@ -10,6 +10,8 @@ import javafx.collections.FXCollections;
 import javafx.collections.ObservableList;
 import javafx.fxml.FXMLLoader;
 import javafx.scene.Node;
+import javafx.scene.control.Alert;
+import javafx.scene.control.Alert.AlertType;
 import javafx.scene.input.KeyEvent;
 import javafx.scene.layout.Pane;
 import seng302.gameServer.GameState;
@@ -69,12 +71,11 @@ public class GameClient {
      */
     public void runAsClient(String ipAddress, Integer portNumber) {
         try {
-            socketThread = new ClientToServerThread(ipAddress, portNumber);
+            startClientToServerThread(ipAddress, portNumber);
-        } catch (IOException ioe) {
+            socketThread.addDisconnectionListener((cause) -> {
-            ioe.printStackTrace();
+                showConnectionError(cause);
-            System.out.println("Unable to connect to host...");
+                Platform.runLater(this::loadStartScreen);
-        }
+            });
-
             socketThread.addStreamObserver(this::parsePackets);
             LobbyController lobbyController = loadLobby();
             lobbyController.setPlayerListSource(clientLobbyList);
@@ -91,6 +92,10 @@ public class GameClient {
 
             lobbyController.addCloseListener((exitCause) -> this.loadStartScreen());
             this.lobbyController = lobbyController;
+        } catch (IOException ioe) {
+            showConnectionError("Unable to find server");
+            Platform.runLater(this::loadStartScreen);
+        }
     }
 
     /**
@@ -99,22 +104,18 @@ public class GameClient {
      * @param portNumber Port to connect to.
      */
     public void runAsHost(String ipAddress, Integer portNumber) {
-        server = new MainServerThread();
         try {
-            socketThread = new ClientToServerThread(ipAddress, portNumber);
+            startClientToServerThread(ipAddress, portNumber);
-        } catch (IOException ioe) {
+            socketThread.addDisconnectionListener((cause) -> {
-            ioe.printStackTrace();
+                Platform.runLater(this::loadStartScreen);
-            System.out.println("Unable to make local connection to host...");
+            });
-        }
-        socketThread.addStreamObserver(this::parsePackets);
             LobbyController lobbyController = loadLobby();
             lobbyController.setPlayerListSource(clientLobbyList);
 
-        if (regattaData != null){
+            if (regattaData != null) {
                 lobbyController.setTitle("Hosting: " + regattaData.getRegattaName());
                 lobbyController.setCourseName(regattaData.getCourseName());
-        }
+            } else {
-        else{
                 lobbyController.setTitle("Hosting: " + ipAddress);
                 lobbyController.setCourseName("");
             }
@@ -128,9 +129,12 @@ public class GameClient {
                     loadStartScreen();
                 }
             });
-
             this.lobbyController = lobbyController;
             server.setGameClient(this);
+        } catch (IOException ioe) {
+            showConnectionError("Cannot connect to server as host");
+            Platform.runLater(this::loadStartScreen);
+        }
     }
 
     private void loadStartScreen() {
@@ -145,10 +149,24 @@ public class GameClient {
             holderPane.getChildren().clear();
             holderPane.getChildren().add(fxmlLoader.load());
         } catch (IOException e) {
-            e.printStackTrace();
+            showConnectionError("JavaFX crashed. Please restart the app");
         }
     }
 
+    private void showConnectionError (String message) {
+        Platform.runLater(() -> {
+            Alert alert = new Alert(AlertType.ERROR);
+            alert.setHeaderText("Connection Error");
+            alert.setContentText(message);
+            alert.showAndWait();
+        });
+    }
+
+    private void startClientToServerThread (String ipAddress, int portNumber) throws IOException {
+        socketThread = new ClientToServerThread(ipAddress, portNumber);
+        socketThread.addStreamObserver(this::parsePackets);
+    }
+
     /**
      * Loads a view of the lobby into the clients pane
      *
@@ -353,13 +371,13 @@ public class GameClient {
     private void keyPressed(KeyEvent e) {
         switch (e.getCode()) {
             case SPACE: // align with vmg
-                socketThread.sendBoatAction(BoatAction.VMG); break;
+                socketThread.sendBoatActionMessage(BoatAction.VMG); break;
             case PAGE_UP: // upwind
-                socketThread.sendBoatAction(BoatAction.UPWIND); break;
+                socketThread.sendBoatActionMessage(BoatAction.UPWIND); break;
             case PAGE_DOWN: // downwind
-                socketThread.sendBoatAction(BoatAction.DOWNWIND); break;
+                socketThread.sendBoatActionMessage(BoatAction.DOWNWIND); break;
             case ENTER: // tack/gybe
-                socketThread.sendBoatAction(BoatAction.TACK_GYBE); break;
+                socketThread.sendBoatActionMessage(BoatAction.TACK_GYBE); break;
         }
     }
 
@@ -368,12 +386,12 @@ public class GameClient {
         switch (e.getCode()) {
             //TODO 12/07/17 Determine the sail state and send the appropriate packet (eg. if sails are in, send a sail out packet)
             case SHIFT:  // sails in/sails out
-                socketThread.sendBoatAction(BoatAction.SAILS_IN);
+                socketThread.sendBoatActionMessage(BoatAction.SAILS_IN);
                 allBoatsMap.get(socketThread.getClientId()).toggleSail();
                 break;
             case PAGE_UP:
             case PAGE_DOWN:
-                socketThread.sendBoatAction(BoatAction.MAINTAIN_HEADING); break;
+                socketThread.sendBoatActionMessage(BoatAction.MAINTAIN_HEADING); break;
         }
     }
 

src/main/java/seng302/visualiser/GameView.java

@@ -277,7 +277,31 @@ public class GameView extends Pane {
             colour = Color.BLACK;
         }
 
-        //Creating mark arrows.
+        createMarkArrows(sequence);
+
+        //Scale race to markers if there is no border.
+        if (borderPoints == null) {
+            rescaleRace(new ArrayList<>(markerObjects.keySet()));
+        }
+        //Move the Markers to initial position.
+        markerObjects.forEach(((mark, marker) -> {
+            Point2D p2d = findScaledXY(mark.getLat(), mark.getLng());
+            marker.setLayoutX(p2d.getX());
+            marker.setLayoutY(p2d.getY());
+        }));
+        Platform.runLater(() -> {
+            markers.getChildren().clear();
+            markers.getChildren().addAll(gates);
+            markers.getChildren().addAll(markerObjects.values());
+        });
+    }
+
+    /**
+     * Calculates all the data needed for to create mark arrows. Requires that a course has been
+     * added to the gameview.
+     * @param sequence The order in which marks are traversed.
+     */
+    private void createMarkArrows (List<Corner> sequence) {
         for (int i=1; i < sequence.size()-1; i++) { //General case.
             double averageLat = 0;
             double averageLng = 0;
@@ -297,7 +321,7 @@ public class GameView extends Pane {
                 averageLng += mark.getLng();
             }
             GeoPoint nextMarkAv = new GeoPoint(averageLat / numMarks, averageLng / numMarks);
-            // TODO: 16/08/17 This comparison is cancer and deserves to die.
+            // TODO: 16/08/17 This comparison doesn't need to exist but the alternative is to user server enum client side.
             for (Mark mark : course.get(i).getMarks()) {
                 markerObjects.get(mark).addArrows(
                     mark.getRoundingSide() == RoundingSide.STARBOARD ? MarkArrowFactory.RoundingSide.STARBOARD : MarkArrowFactory.RoundingSide.PORT,
@@ -306,9 +330,11 @@ public class GameView extends Pane {
                 );
             }
         }
+        createStartLineArrows();
+        createFinishLineArrows();
+    }
 
-        // TODO: 16/08/17 Make this cleaner
+    private void createStartLineArrows () {
-        //First mark case
         double averageLat = 0;
         double averageLng = 0;
         int numMarks = 0;
@@ -325,10 +351,12 @@ public class GameView extends Pane {
                 GeoUtility.getBearing(mark, firstMarkAv)
             );
         }
-        //Last Mark case
+    }
-        numMarks = 0;
+
-        averageLat = 0;
+    private void createFinishLineArrows () {
-        averageLng = 0;
+        double numMarks = 0;
+        double averageLat = 0;
+        double averageLng = 0;
         for (Mark mark : course.get(course.size()-2).getMarks()) {
             numMarks += 1;
             averageLat += mark.getLat();
@@ -342,22 +370,6 @@ public class GameView extends Pane {
                 GeoUtility.getBearing(mark, mark)
             );
         }
-
-        //Scale race to markers if there is no border.
-        if (borderPoints == null) {
-            rescaleRace(new ArrayList<>(markerObjects.keySet()));
-        }
-        //Move the Markers to initial position.
-        markerObjects.forEach(((mark, marker) -> {
-            Point2D p2d = findScaledXY(mark.getLat(), mark.getLng());
-            marker.setLayoutX(p2d.getX());
-            marker.setLayoutY(p2d.getY());
-        }));
-        Platform.runLater(() -> {
-            markers.getChildren().clear();
-            markers.getChildren().addAll(gates);
-            markers.getChildren().addAll(markerObjects.values());
-        });
     }
 
     /**

src/test/java/seng302/visualiser/ClientToServerTests/RegularPacketsTest.java

@@ -30,12 +30,12 @@ public class RegularPacketsTest {
 //        ServerYacht yacht = new ArrayList<>(GameState.getYachts().values()).get(0);
 //        double startAngle = yacht.getHeading();
 //        long startTime = System.currentTimeMillis();
-//        clientThread.sendBoatAction(BoatAction.UPWIND);
+//        clientThread.sendBoatActionMessage(BoatAction.UPWIND);
 //        Thread.sleep(200);
 //        while (Math.abs(yacht.getHeading() - startAngle) < TEST_DISTANCE) {
 //            Thread.sleep(1);
 //        }
-//        clientThread.sendBoatAction(BoatAction.MAINTAIN_HEADING);
+//        clientThread.sendBoatActionMessage(BoatAction.MAINTAIN_HEADING);
 //        long endTime = System.currentTimeMillis();
 //        SleepThreadMaxDelay();
 //        //Allowed to be two loops of delay due to loop delay and processing delay at client + server ends.
@@ -50,7 +50,7 @@ public class RegularPacketsTest {
 //        SleepThreadMaxDelay();
 //        Yacht yacht = new ArrayList<>(GameState.getYachts().values()).get(0);
 //        boolean startState = yacht.getSailIn();
-//        clientThread.sendBoatAction(BoatAction.SAILS_IN);
+//        clientThread.sendBoatActionMessage(BoatAction.SAILS_IN);
 //        SleepThreadMaxDelay();
 //        Assert.assertEquals(startState, !yacht.getSailIn());
 //    }

src/test/java/steps/ToggleSailSteps.java

@@ -36,7 +36,7 @@ public class ToggleSailSteps {
     public void the_user_has_pressed(String arg1) throws Throwable {
         startTime = System.currentTimeMillis();
         if (arg1 == "shift") {
-            client.sendBoatAction(BoatAction.SAILS_IN);
+            client.sendBoatActionMessage(BoatAction.SAILS_IN);
         }
     }