Change ChunkletManager to a notify/demand system

Allowing NullChunkletManager to bypass the ChunkletUnloader as it is not needed.

src/main/java/com/gmail/nossr50/listeners/WorldListener.java

@@ -33,6 +33,6 @@ public class WorldListener implements Listener {
 
     @EventHandler
     public void onChunkUnload(ChunkUnloadEvent event) {
-        ChunkletUnloader.addToList(event.getChunk());
+        mcMMO.placeStore.chunkUnloaded(event.getChunk().getX(), event.getChunk().getZ(), event.getWorld());
     }
 }

src/main/java/com/gmail/nossr50/runnables/ChunkletUnloader.java

@@ -6,6 +6,7 @@ import java.util.Map;
 import java.util.Map.Entry;
 
 import org.bukkit.Chunk;
+import org.bukkit.World;
 
 import com.gmail.nossr50.mcMMO;
 
@@ -26,6 +27,10 @@ public class ChunkletUnloader implements Runnable {
         unloadedChunks.put(chunk, 0);
     }
 
+    public static void addToList(int cx, int cz, World world) {
+        addToList(world.getChunkAt(cx, cz));
+    }
+
     @Override
     public void run() {
         for (Iterator<Entry<Chunk, Integer>> it = unloadedChunks.entrySet().iterator() ; it.hasNext() ; ) {
@@ -37,7 +42,7 @@ public class ChunkletUnloader implements Runnable {
 
                 //Chunklets are unloaded only if their chunk has been unloaded for minimumInactiveTime
                 if (inactiveTime >= minimumInactiveTime) {
-                    mcMMO.placeStore.chunkUnloaded(chunk.getX(), chunk.getZ(), chunk.getWorld());
+                    mcMMO.placeStore.unloadChunk(chunk.getX(), chunk.getZ(), chunk.getWorld());
                     it.remove();
                     continue;
                 }

src/main/java/com/gmail/nossr50/util/blockmeta/ChunkletManager.java

@@ -15,7 +15,35 @@ public interface ChunkletManager {
     public void loadChunklet(int cx, int cy, int cz, World world);
 
     /**
-     * Informs the ChunkletManager a chunk is loaded, it should load appropriate data
+     * Unload a specific chunklet
+     *
+     * @param cx Chunklet X coordinate that needs to be unloaded
+     * @param cy Chunklet Y coordinate that needs to be unloaded
+     * @param cz Chunklet Z coordinate that needs to be unloaded
+     * @param world World that the chunklet needs to be unloaded from
+     */
+    public void unloadChunklet(int cx, int cy, int cz, World world);
+
+    /**
+     * Load a given Chunk's Chunklet data
+     *
+     * @param cx Chunk X coordinate that is to be loaded
+     * @param cz Chunk Z coordinate that is to be loaded
+     * @param world World that the Chunk is in
+     */
+    public void loadChunk(int cx, int cz, World world);
+
+    /**
+     * Unload a given Chunk's Chunklet data
+     *
+     * @param cx Chunk X coordinate that is to be unloaded
+     * @param cz Chunk Z coordinate that is to be unloaded
+     * @param world World that the Chunk is in
+     */
+    public void unloadChunk(int cx, int cz, World world);
+
+    /**
+     * Informs the ChunkletManager a chunk is loaded
      *
      * @param cx Chunk X coordinate that is loaded
      * @param cz Chunk Z coordinate that is loaded
@@ -24,7 +52,7 @@ public interface ChunkletManager {
     public void chunkLoaded(int cx, int cz, World world);
 
     /**
-     * Informs the ChunkletManager a chunk is unloaded, it should unload and save appropriate data
+     * Informs the ChunkletManager a chunk is unloaded
      *
      * @param cx Chunk X coordinate that is unloaded
      * @param cz Chunk Z coordinate that is unloaded

src/main/java/com/gmail/nossr50/util/blockmeta/HashChunkletManager.java

@@ -16,6 +16,7 @@ import org.bukkit.World;
 import org.bukkit.block.Block;
 
 import com.gmail.nossr50.mcMMO;
+import com.gmail.nossr50.runnables.ChunkletUnloader;
 
 public class HashChunkletManager implements ChunkletManager {
     private HashMap<String, ChunkletStore> store = new HashMap<String, ChunkletStore>();
@@ -37,28 +38,44 @@ public class HashChunkletManager implements ChunkletManager {
     }
 
     @Override
-    public void chunkLoaded(int cx, int cz, World world) {
-        //File dataDir = new File(world.getWorldFolder(), "mcmmo_data");
-        //File cxDir = new File(dataDir, "" + cx);
-        //if(!cxDir.exists()) return;
-        //File czDir = new File(cxDir, "" + cz);
-        //if(!czDir.exists()) return;
-
-        //for(int y = 0; y < 4; y++) {
-        //    File yFile = new File(czDir, "" + y);
-        //    if(!yFile.exists()) {
-        //        continue;
-        //    } else {
-        //        ChunkletStore in = deserializeChunkletStore(yFile);
-        //        if(in != null) {
-        //            store.put(world.getName() + "," + cx + "," + cz + "," + y, in);
-        //        }
-        //    }
-        //}
+    public void unloadChunklet(int cx, int cy, int cz, World world) {
+        File dataDir = new File(world.getWorldFolder(), "mcmmo_data");
+        if(store.containsKey(world.getName() + "," + cx + "," + cz + "," + cy)) {
+            File cxDir = new File(dataDir, "" + cx);
+            if(!cxDir.exists()) cxDir.mkdir();
+            File czDir = new File(cxDir, "" + cz);
+            if(!czDir.exists()) czDir.mkdir();
+            File yFile = new File(czDir, "" + cy);
+
+            ChunkletStore out = store.get(world.getName() + "," + cx + "," + cz + "," + cy);
+            serializeChunkletStore(out, yFile);
+            store.remove(world.getName() + "," + cx + "," + cz + "," + cy);
+        }
     }
 
     @Override
-    public void chunkUnloaded(int cx, int cz, World world) {
+    public void loadChunk(int cx, int cz, World world) {
+        File dataDir = new File(world.getWorldFolder(), "mcmmo_data");
+        File cxDir = new File(dataDir, "" + cx);
+        if(!cxDir.exists()) return;
+        File czDir = new File(cxDir, "" + cz);
+        if(!czDir.exists()) return;
+
+        for(int y = 0; y < 4; y++) {
+            File yFile = new File(czDir, "" + y);
+            if(!yFile.exists()) {
+                continue;
+            } else {
+                ChunkletStore in = deserializeChunkletStore(yFile);
+                if(in != null) {
+                    store.put(world.getName() + "," + cx + "," + cz + "," + y, in);
+                }
+            }
+        }
+    }
+
+    @Override
+    public void unloadChunk(int cx, int cz, World world) {
         File dataDir = new File(world.getWorldFolder(), "mcmmo_data");
 
         for(int y = 0; y < 4; y++) {
@@ -76,6 +93,16 @@ public class HashChunkletManager implements ChunkletManager {
         }
     }
 
+    @Override
+    public void chunkLoaded(int cx, int cz, World world) {
+        //loadChunk(cx, cz, world);
+    }
+
+    @Override
+    public void chunkUnloaded(int cx, int cz, World world) {
+        ChunkletUnloader.addToList(cx, cx, world);
+    }
+
     @Override
     public void saveWorld(World world) {
         String worldName = world.getName();

src/main/java/com/gmail/nossr50/util/blockmeta/NullChunkletManager.java

@@ -14,6 +14,21 @@ public class NullChunkletManager implements ChunkletManager {
         return;
     }
 
+	@Override
+	public void unloadChunklet(int cx, int cy, int cz, World world) {
+		return;
+	}
+
+	@Override
+	public void loadChunk(int cx, int cz, World world) {
+		return;
+	}
+
+	@Override
+	public void unloadChunk(int cx, int cz, World world) {
+		return;
+	}
+
     @Override
     public void chunkLoaded(int cx, int cz, World world) {
         return;