Added Autosave

src/main/java/eu/ruekov/ruakij/LinkedBeaconTeleporters/Main.java

@@ -42,6 +42,8 @@ public class Main extends JavaPlugin {
 
         LinkedBeaconTeleporterManager.init();
 
+        initAutoSave();
+
         log.info("Plugin activated");
     }
 
@@ -90,4 +92,12 @@ public class Main extends JavaPlugin {
             ex.printStackTrace();
         }
     }
+
+    static int autosaveInterval = 600 * 20;
+    static void initAutoSave(){
+        Bukkit.getScheduler().scheduleSyncRepeatingTask(plugin, () -> {
+            saveData();
+
+        }, autosaveInterval, autosaveInterval);
+    }
 }

src/main/java/eu/ruekov/ruakij/LinkedBeaconTeleporters/linkedBeaconTeleporter/LinkedBeaconTeleporterManager.java

@@ -83,7 +83,17 @@ public class LinkedBeaconTeleporterManager {
         Main.log.info("All done!");
     }
 
-    public static boolean saveData(){
+    static int oldDataHashCode;
+    public static boolean writeData(){
+        // Check if data changed
+        int dataHashCode = placedLBTsById.hashCode();
+        if(oldDataHashCode != dataHashCode){
+            // Changed
+            oldDataHashCode = dataHashCode;
+        }
+        else // Did not change
+            return false;
+
         Main.data = new YamlConfiguration();
         for(String teleporterId : placedLBTsById.keySet()){
             List<LinkedBeaconTeleporter> LBTs = placedLBTsById.get(teleporterId);