Remove saving to database on disable.

https://github.com/BentoBoxWorld/Level/issues/229

First, the top ten tables are never actually used or loaded. They are
created in memory by loading the island levels. So there is no reason to
keep saving them.
Second, the island level data is saved every time it is changed, so
there is no need to save all of the cache on exit.

src/main/java/world/bentobox/level/Level.java

@@ -247,11 +247,6 @@ public class Level extends Addon implements Listener {
     public void onDisable() {
         // Stop the pipeline
         this.getPipeliner().stop();
-        // Save player data and the top tens
-        if (manager != null) {
-            manager.save();
-        }
-
     }
 
     private void loadBlockSettings() {

src/main/java/world/bentobox/level/LevelsManager.java

@@ -64,8 +64,6 @@ public class LevelsManager {
     private final Database<IslandLevels> handler;
     // A cache of island levels.
     private final Map<String, IslandLevels> levelsCache;
-
-    private final Database<TopTenData> topTenHandler;
     // Top ten lists
     private final Map<World,TopTenData> topTenLists;
     // Background
@@ -79,8 +77,6 @@ public class LevelsManager {
         // Set up the database handler to store and retrieve data
         // Note that these are saved by the BentoBox database
         handler = new Database<>(addon, IslandLevels.class);
-        // Top Ten handler
-        topTenHandler = new Database<>(addon, TopTenData.class);
         // Initialize the cache
         levelsCache = new HashMap<>();
         // Initialize top ten lists
@@ -181,8 +177,6 @@ public class LevelsManager {
             }
             // Save result
             setIslandResults(island.getWorld(), island.getOwner(), r);
-            // Save top ten
-            addon.getManager().saveTopTen(island.getWorld());
             // Save the island scan details
             result.complete(r);
         });
@@ -418,11 +412,11 @@ public class LevelsManager {
                 .collect(Collectors.toMap(
                         Map.Entry::getKey, Map.Entry::getValue, (e1, e2) -> e1, LinkedHashMap::new)));
     }
-    
+
     void createAndCleanRankings(@NonNull World world) {
         topTenLists.computeIfAbsent(world, TopTenData::new);
         // Remove player from top ten if they are online and do not have the perm
-        topTenLists.get(world).getTopTen().keySet().removeIf(u -> !hasTopTenPerm(world, u)); 
+        topTenLists.get(world).getTopTen().keySet().removeIf(u -> !hasTopTenPerm(world, u));
     }
 
     /**
@@ -441,12 +435,12 @@ public class LevelsManager {
     public int getRank(@NonNull World world, UUID uuid) {
         createAndCleanRankings(world);
         Stream<Entry<UUID, Long>> stream = topTenLists.get(world).getTopTen().entrySet().stream()
-        .filter(e -> addon.getIslands().isOwner(world, e.getKey()))
+                .filter(e -> addon.getIslands().isOwner(world, e.getKey()))
-        .filter(l -> l.getValue() > 0)
+                .filter(l -> l.getValue() > 0)
-        .sorted(Collections.reverseOrder(Map.Entry.comparingByValue()));
+                .sorted(Collections.reverseOrder(Map.Entry.comparingByValue()));
         return takeWhile(stream, x -> !x.getKey().equals(uuid)).map(Map.Entry::getKey).collect(Collectors.toList()).size() + 1;
     }
-    
+
     /**
      * Java 8's version of Java 9's takeWhile
      * @param stream
@@ -457,7 +451,7 @@ public class LevelsManager {
         CustomSpliterator<T> customSpliterator = new CustomSpliterator<>(stream.spliterator(), predicate);
         return StreamSupport.stream(customSpliterator, false);
     }
-    
+
     /**
      * Checks if player has the correct top ten perm to have their level saved
      * @param world
@@ -475,15 +469,14 @@ public class LevelsManager {
     void loadTopTens() {
         topTenLists.clear();
         Bukkit.getScheduler().runTaskAsynchronously(addon.getPlugin(), () -> {
-            addon.log("Generating Top Ten Tables");
+            addon.log("Generating rankings");
             handler.loadObjects().forEach(il -> {
                 if (il.getLevel() > 0) {
                     addon.getIslands().getIslandById(il.getUniqueId()).ifPresent(i -> this.addToTopTen(i, il.getLevel()));
                 }
             });
             topTenLists.keySet().forEach(w -> {
-                addon.log("Loaded top ten for " + w.getName());
+                addon.log("Generated rankings for " + w.getName());
-                this.saveTopTen(w);
             });
 
         });
@@ -497,27 +490,10 @@ public class LevelsManager {
     public void removeEntry(World world, UUID uuid) {
         if (topTenLists.containsKey(world)) {
             topTenLists.get(world).getTopTen().remove(uuid);
-            topTenHandler.saveObjectAsync(topTenLists.get(world));
         }
 
     }
 
-    /**
-     * Saves all player data and the top ten
-     */
-    public void save() {
-        levelsCache.values().forEach(handler::saveObjectAsync);
-        topTenLists.values().forEach(topTenHandler::saveObjectAsync);
-    }
-
-    /**
-     * Save the top ten for world
-     * @param world - world
-     */
-    public void saveTopTen(World world) {
-        topTenHandler.saveObjectAsync(topTenLists.get(world));
-    }
-
     /**
      * Set an initial island level
      * @param island - the island to set. Must have a non-null world

src/test/java/world/bentobox/level/LevelsManagerTest.java

@@ -401,14 +401,6 @@ public class LevelsManagerTest {
         assertFalse(tt.containsKey(uuid));
     }
 
-    /**
-     * Test method for {@link world.bentobox.level.LevelsManager#save()}.
-     */
-    @Test
-    public void testSave() {
-        lm.save();
-    }
-
     /**
      * Test method for {@link world.bentobox.level.LevelsManager#setInitialIslandLevel(world.bentobox.bentobox.database.objects.Island, long)}.
      */
@@ -443,7 +435,7 @@ public class LevelsManagerTest {
         }
          */
     }
-    
+
     /**
      * Test method for {@link world.bentobox.level.LevelsManager#getRank(World, UUID)}
      */
@@ -453,7 +445,7 @@ public class LevelsManagerTest {
         Map<World, TopTenData> ttl = lm.getTopTenLists();
         Map<UUID, Long> tt = ttl.get(world).getTopTen();
         for (long i = 100; i < 150; i++) {
-           tt.put(UUID.randomUUID(), i);
+            tt.put(UUID.randomUUID(), i);
         }
         // Put player as lowest rank
         tt.put(uuid, 10L);