complete overhaul of client / server communication. Several methods renamed, tweaked protocol.

src/main/java/ch/unibas/dmi/dbis/cs108/BudaLogConfig.java

@@ -16,7 +16,7 @@ public class BudaLogConfig {
     LoggerContext ctx = (LoggerContext) LogManager.getContext(false);
     Configuration config = ctx.getConfiguration();
     LoggerConfig loggerConfig = config.getLoggerConfig(LogManager.ROOT_LOGGER_NAME);
-    loggerConfig.setLevel(Level.TRACE); // change level here
+    loggerConfig.setLevel(Level.DEBUG); // change level here
     ctx.updateLoggers();  // This causes all Loggers to refetch information from their LoggerConfig.
   }
 

src/main/java/ch/unibas/dmi/dbis/cs108/multiplayer/client/Client.java

@@ -6,6 +6,7 @@ import ch.unibas.dmi.dbis.cs108.multiplayer.helpers.ClientPinger;
 
 import java.net.Socket;
 import java.io.*;
+import java.net.SocketException;
 import java.net.UnknownHostException;
 import java.util.Scanner;
 import org.apache.logging.log4j.LogManager;
@@ -27,14 +28,9 @@ public class Client {
       this.socket = socket;
       this.out = new BufferedWriter(new OutputStreamWriter(socket.getOutputStream()));
       this.in = new BufferedReader((new InputStreamReader((socket.getInputStream()))));
-
-      //TODO add the system based generated username here.
-      //TODO hide connecting logik(next 4 lines)
       this.userName = userName;
-      this.out.write(getUsername());
+      sendMsgToServer(getUsername());
-      this.out.newLine();
+      clientPinger = new ClientPinger(this, this.socket);
-      this.out.flush();
-      clientPinger = new ClientPinger(this.out, this.socket);
     } catch (IOException e) {
       e.printStackTrace();
       closeEverything(socket, in, out);
@@ -44,20 +40,19 @@ public class Client {
   /**
    * Sends a message to the Server in a formatted way COMND$msg
    */
-  public void sendMessage() {
+  public void userInputListener() {
-    try {
+    new Thread(new Runnable() {
+      @Override
+      public void run() {
         Scanner sc = new Scanner(System.in);
-      while (socket.isConnected()) {
+        while (socket.isConnected() && !socket.isClosed()) {
           String msg = sc.nextLine();
           String formattedMSG = MessageFormatter.formatMsg(msg);
-        out.write(formattedMSG);
+          sendMsgToServer(formattedMSG);
-        out.newLine();
-        out.flush();
         }
-    } catch (IOException e) {
+        LOGGER.debug("userInputListener is done");
-      e.printStackTrace();
-      closeEverything(socket, in, out);
       }
+    }).start();
   }
 
 
@@ -74,16 +69,19 @@ public class Client {
 
         String chatMsg;
 
-        while (socket.isConnected()) {
+        while (socket.isConnected() && !socket.isClosed()) {
           try {
             chatMsg = in.readLine();
-            parse(chatMsg);
+            if (chatMsg != null) {
+              parse(chatMsg);           //todo: i think this trows an error BC chatMsg is null if client disconnects
+            }
           } catch (IOException e) {
             e.printStackTrace();
             closeEverything(socket, in, out);
           }
 
         }
+        LOGGER.debug("chatListener is done");
       }
     }).start();
   }
@@ -152,7 +150,7 @@ public class Client {
       client.chatListener();
       Thread cP = new Thread(client.clientPinger);
       cP.start();
-      client.sendMessage();     //this one blocks.
+      client.userInputListener();     //this one blocks.
     } catch (UnknownHostException e) {
       System.out.println("Invalid host IP");
     } catch (IOException e) {

src/main/java/ch/unibas/dmi/dbis/cs108/multiplayer/client/JClientProtocolParser.java

@@ -38,6 +38,9 @@ public class JClientProtocolParser {
          */
         System.out.println(msg.substring(6));
         break;
+      case "QUITC":
+        //c.closeEverything(); todo: this line.
+        System.out.println("bye!");
       default:
         System.out.println("Received unknown command");
     }

src/main/java/ch/unibas/dmi/dbis/cs108/multiplayer/client/MessageFormatter.java

@@ -19,16 +19,20 @@ public class MessageFormatter {
   public static String formatMsg(String msg) {
     String header = ""; //header is first two characters
     StringBuilder stringBuilder = new StringBuilder();
-    String s; // just a friendly helper to save message in
+    String s = ""; // just a friendly helper to save message in
     try {
       header = msg.substring(0, 2);
     } catch (IndexOutOfBoundsException e) {
-      e.printStackTrace();
+      header = "";
     }
     switch (header) {
       case "/c":
         stringBuilder.append("CHATA$");
+        try {
           s = msg.substring(3);
+        } catch (Exception e) {
+          System.out.println("You didn't even write a chat line, you silly billy!");
+        }
         break;
       case "/q":
         stringBuilder.append("QUITS$");
@@ -36,7 +40,11 @@ public class MessageFormatter {
         break;
       case "/n":
         stringBuilder.append("NAMEC$");
+        try {
           s = msg.substring(3);
+        } catch (Exception e) {
+          System.out.println("Well what do you want your name to be?");
+        }
         break;
       default:
         s = msg;

src/main/java/ch/unibas/dmi/dbis/cs108/multiplayer/helpers/ClientPinger.java

@@ -1,6 +1,7 @@
 package ch.unibas.dmi.dbis.cs108.multiplayer.helpers;
 
 import ch.unibas.dmi.dbis.cs108.BudaLogConfig;
+import ch.unibas.dmi.dbis.cs108.multiplayer.client.Client;
 import java.io.BufferedWriter;
 import java.io.IOException;
 import java.net.Socket;
@@ -18,19 +19,17 @@ public class ClientPinger implements Runnable {
 
   private boolean gotPingBack;    //should be set to true when client gets a pingback.
   private boolean isConnected;    //set to true unless the ClientPinger detects a connection loss.
-  BufferedWriter out;             //the output of this client through which the pings are sent
+  private final Client client;
-  private Socket socket;
+  private final Socket socket;
 
   /**
    * @param socket the socket the Client is connected to which is used to end the thread if the
    *               connection is lost.
-   *
-   * @param out    the output through which the pings are sent.
    */
-  public ClientPinger(BufferedWriter out, Socket socket) {
+  public ClientPinger(Client client, Socket socket) {
     gotPingBack = false;
     isConnected = true;
-    this.out = out;
+    this.client = client;
     this.socket = socket;
   }
 
@@ -38,11 +37,9 @@ public class ClientPinger implements Runnable {
   public void run() {
     try {
       Thread.sleep(2000);
-      while (socket.isConnected()) {
+      while (socket.isConnected() && !socket.isClosed()) {
         gotPingBack = false;
-        out.write("CPING");
+        client.sendMsgToServer("CPING");
-        out.newLine();
-        out.flush();
         Thread.sleep(4000);
         if (gotPingBack) {
           if (!isConnected) {         //if !isConnected, then the connection had been lost before.
@@ -56,8 +53,8 @@ public class ClientPinger implements Runnable {
           }
         }
       }
-      isConnected = false;         //in case the socket accidentally disconnects (can this happen?)
+      isConnected = false;
-    } catch (InterruptedException | IOException e) {
+    } catch (InterruptedException e) {
       e.printStackTrace();
     }
   }

src/main/java/ch/unibas/dmi/dbis/cs108/multiplayer/helpers/Protocol.txt

@@ -2,7 +2,10 @@ Client commands:
 
 Implemented:
  * CHATA$message      Send chat message to all
- * QUITS              quit server/ leave server
+ * QUITS              request to quit server/ leave server. The server should then remove the
+                      relevant ClientHandler and close the sockets, but before doing so, it sends
+                      "QUITC" to the client to confirm the quitting. The client doesn't close any
+                      sockets until receiving "QUITC"
  * CPING              Ping from client to server.
  * PINGB              Pingback from client to server.
  * NAMEC$name         Change name to whatever is specified
@@ -22,6 +25,7 @@ Server Commands:
 Implemented:
  * SPING              Ping from server to client
  * PINGB              Pingback from client to server.
+ * QUITC              Confirms to the client that they are being disconnected from the server.
 
 Future / planned:
  * MSGRS              "Message received": Paramaters: a string detailing to the client that and what the server received as command.

src/main/java/ch/unibas/dmi/dbis/cs108/multiplayer/helpers/ServerPinger.java

@@ -38,9 +38,9 @@ public class ServerPinger implements Runnable {
   public void run() {
     try {
       Thread.sleep(2000);
-      while (socket.isConnected()) {
+      while (socket.isConnected() && !socket.isClosed()) {
         gotPingBack = false;
-        out.write("SPING");
+        out.write("SPING");     //todo: throws exception when client disconnects.
         out.newLine();
         out.flush();
         Thread.sleep(4000);

src/main/java/ch/unibas/dmi/dbis/cs108/multiplayer/server/ClientHandler.java

@@ -17,6 +17,7 @@ public class ClientHandler implements Runnable {
   private BufferedWriter out;
   private BufferedReader in;
   private Socket socket;
+  private
   Scanner sc;
   public ServerPinger serverPinger;
   public static HashSet<ClientHandler> connectedClients = new HashSet<>();
@@ -44,10 +45,9 @@ public class ClientHandler implements Runnable {
       serverPinger = new ServerPinger(out, socket);
       Thread sP = new Thread(serverPinger);
       sP.start();
-      broadcastMessage("SERVER: " + clientUserName + " has joined the Server");
+      broadcastChatMessage("SERVER: " + clientUserName + " has joined the Server");
     } catch (IOException e) {
       e.printStackTrace();
-      closeEverything(socket, in, out);
     }
   }
 
@@ -87,13 +87,12 @@ public class ClientHandler implements Runnable {
    **/
   public void run() {
     String msg;
-    while (socket.isConnected()) {
+    while (socket.isConnected() && !socket.isClosed()) {
       try {
         msg = in.readLine();      //todo: here is where the server throws an exception when the client quits
         JServerProtocolParser.parse(msg, this);
       } catch (IOException e) {
         e.printStackTrace();
-        closeEverything(socket, in, out);
         break;
       }
     }
@@ -116,7 +115,7 @@ public class ClientHandler implements Runnable {
     String h = this.clientUserName; //just a friendly little helper
     this.clientUserName = newName;
     AllClientNames.allNames(newName);
-    broadcastMessage(h + " have changed their nickname to " + clientUserName);
+    broadcastChatMessage(h + " have changed their nickname to " + clientUserName);
   }
 
   /**
@@ -124,10 +123,9 @@ public class ClientHandler implements Runnable {
    *
    * @param msg the Message to be broadcasted
    */
-
+  public void broadcastChatMessage(String msg) {
-  public void broadcastMessage(String msg) {
     for (ClientHandler client : connectedClients) {
-      client.sendMsgToClient("CHATM:" + clientUserName + ": \"" + msg + "\"");
+      client.sendMsgToClient("CHATM$" + clientUserName + ": \"" + msg + "\"");
     }
   }
 
@@ -135,9 +133,9 @@ public class ClientHandler implements Runnable {
    * todo: check for exception if out is closed.
    * @param msg the given message
    */
-
   public void sendMsgToClient(String msg) {
     try {
+      //todo: socket closed handling
       out.write(msg);
       out.newLine();
       out.flush();
@@ -150,8 +148,8 @@ public class ClientHandler implements Runnable {
    * Does what it sounds like
    */
   public void removeClientHandler() {
+    broadcastChatMessage("SERVER: " + clientUserName + " has left the server");
     connectedClients.remove(this);
-    broadcastMessage("SERVER: " + clientUserName + " has left the server");
   }
 
   /**
@@ -161,9 +159,14 @@ public class ClientHandler implements Runnable {
    * @param in the in-Stream reader to be closed
    * @param out the out-Stream Write to be closed
    */
-  public void closeEverything(Socket socket, BufferedReader in, BufferedWriter out) {
+  public void disconnectClient() {
+    sendMsgToClient("QUITC");
     removeClientHandler();
+    socket = this.getSocket();
+    in = this.getIn();
+    out = this.getOut();
     try {
+      Thread.sleep(100);
       if (in != null) {
         in.close();
       }
@@ -173,12 +176,10 @@ public class ClientHandler implements Runnable {
       if (socket != null) {
         socket.close();
       }
-    } catch (IOException e) {
+    } catch (IOException | InterruptedException e) {
       e.printStackTrace();
     }
   }
 
-  public void decodeMsg(String msg) {
 
-  }
 }

src/main/java/ch/unibas/dmi/dbis/cs108/multiplayer/server/JServerProtocolParser.java

@@ -30,7 +30,7 @@ public class JServerProtocolParser {
     switch (header) {
       case CHATA:
         //sends chat message to all connected clients
-        h.broadcastMessage(msg.substring(6));
+        h.broadcastChatMessage(msg.substring(6));
         break;
       case "NAMEC":
         //changes name to whatever follows NAMEC$. If the new name is already in use, it will append
@@ -47,7 +47,7 @@ public class JServerProtocolParser {
         break;
       case "QUITS":
         //safely disconnects the user
-        h.closeEverything(h.getSocket(), h.getIn(), h.getOut());
+        h.disconnectClient();
         break;
       default:
         System.out.println("Received unknown command");