#107 Fixed an issue, when two threads were trying to insert key/value into database

core/src/cz/nic/tablexia/model/game/Game.java

@@ -27,6 +27,8 @@ import cz.nic.tablexia.util.Log;
 public class Game {
 
     private static final String DATE_AND_TIME_FORMAT = "d.M.yyyy HH:mm:ss", DATE_FORMAT = "d.M.yyyy";
+	private static final Object ATOMIC_LOCK = new Object();
+
     private long id;
     private User user;
     private GameDifficulty difficulty;
@@ -181,19 +183,22 @@ public class Game {
     }
 
     public void setGameScore(final String key, final String value) {
-        final String storedValue = gameScoreMap.get(key);
         new Thread(new Runnable() {
             @Override
             public void run() {
-                if (storedValue == null) {
-                    if (GameScore.insertGameScore(Game.this.getId(), key, value)) {
-                        gameScoreMap.put(key, value);
-                    }
-                } else {
-                    if (!storedValue.equals(value) && GameScore.updateGameScore(Game.this.getId(), key, value)) {
-                        gameScoreMap.put(key, value);
-                    }
-                }
+				synchronized (ATOMIC_LOCK) {
+					final String storedValue = gameScoreMap.get(key);
+					if (storedValue == null) {
+						if (GameScore.insertGameScore(Game.this.getId(), key, value)) {
+							gameScoreMap.put(key, value);
+						}
+					}
+					else {
+						if (!storedValue.equals(value) && GameScore.updateGameScore(Game.this.getId(), key, value)) {
+							gameScoreMap.put(key, value);
+						}
+					}
+				}
             }
         }).start();
     }