ClientPinger and ServerPinger "merged" from the ping branch

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

@@ -30,9 +30,21 @@ public class ClientPinger implements Runnable{
     public void run() {
         try {
             while (socket.isConnected()) {
+                gotPingBack = false;
                 out.write("CPING");
+                out.newLine();
+                out.flush();
                 Thread.sleep(2000);
-                if (!gotPingBack) isConnected = false;
+                if (gotPingBack) {
+                    if (!isConnected) {         //if !isConnected, then the connection had been lost before.
+                        isConnected = true;
+                        System.out.println("Connection regained!");
+                    }
+                } else {
+                    isConnected = false;
+                    System.out.println("Lost connection. Waiting to reconnect...");
+                }
+
             }
             isConnected = false;                 //in case the socket accidentally disconnects (can this happen?)
         } catch (InterruptedException e) {

src/main/java/ch/unibas/dmi/dbis/cs108/Multiplayer/helpers/PingListener.java

@@ -1,8 +0,0 @@
-package ch.unibas.dmi.dbis.cs108.Multiplayer.helpers;
-
-public class PingListener implements Runnable {
-    @Override
-    public void run() {
-
-    }
-}

src/main/java/ch/unibas/dmi/dbis/cs108/Multiplayer/helpers/PingPong.java

@@ -1,24 +0,0 @@
-package ch.unibas.dmi.dbis.cs108.Multiplayer.helpers;
-
-/**
- * PingPong offers services to for listening and sending
- * Pings to a communication partner.
- * Runs on a Thread as not to disturb other communication channels.(Is this necessary?)
- */
-public class PingPong implements PingPongInterface {
-    @Override
-    public void pingListener(String ping) {
-
-    }
-
-    @Override
-    public String pongSender() {
-        return null;
-    }
-
-    @Override
-    public void run() {
-
-    }
-    //TODO: Impl
-}

src/main/java/ch/unibas/dmi/dbis/cs108/Multiplayer/helpers/PingPongInterface.java

@@ -1,6 +0,0 @@
-package ch.unibas.dmi.dbis.cs108.Multiplayer.helpers;
-
-public interface PingPongInterface extends Runnable{
-    void pingListener(String ping);
-    String pongSender();
-}

src/main/java/ch/unibas/dmi/dbis/cs108/Multiplayer/helpers/PongSender.java

@@ -1,8 +0,0 @@
-package ch.unibas.dmi.dbis.cs108.Multiplayer.helpers;
-
-public class PongSender implements Runnable{
-    @Override
-    public void run() {
-
-    }
-}

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

@@ -30,9 +30,20 @@ public class ServerPinger implements Runnable{
     public void run() {
         try {
             while (socket.isConnected()) {
+                gotPingBack = false;
                 out.write("SPING");
+                out.newLine();
+                out.flush();
                 Thread.sleep(2000);
-                if (!gotPingBack) isConnected = false;
+                if (gotPingBack) {
+                    if (!isConnected) {         //if !isConnected, then the connection had been lost before.
+                        isConnected = true;
+                        System.out.println("Connection regained!");
+                    }
+                } else {
+                    isConnected = false;
+                    System.out.println("Lost connection. Waiting to reconnect...");
+                }
             }
             isConnected = false;                 //in case the socket accidentally disconnects (can this happen?)
         } catch (InterruptedException e) {