KCauldronX/patches/net/minecraft/world/gen/ChunkProviderServer.java.patch

--- ../src-base/minecraft/net/minecraft/world/gen/ChunkProviderServer.java
+++ ../src-work/minecraft/net/minecraft/world/gen/ChunkProviderServer.java
@@ -1,7 +1,13 @@
 package net.minecraft.world.gen;
 
 import com.google.common.collect.Lists;
+
 import cpw.mods.fml.common.registry.GameRegistry;
+import gnu.trove.impl.sync.TSynchronizedLongObjectMap;
+import gnu.trove.map.TLongObjectMap;
+import gnu.trove.map.hash.TLongObjectHashMap;
+import gnu.trove.procedure.TObjectProcedure;
+
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.Collections;
@@ -9,6 +15,7 @@
 import java.util.List;
 import java.util.Set;
 import java.util.concurrent.ConcurrentHashMap;
+
 import net.minecraft.crash.CrashReport;
 import net.minecraft.crash.CrashReportCategory;
 import net.minecraft.entity.EnumCreatureType;
@@ -33,22 +40,52 @@
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 
+
+
+
+
+// CraftBukkit start
+import java.util.Random;
+
+import net.minecraft.block.BlockSand;
+
+import org.bukkit.Server;
+import org.bukkit.craftbukkit.util.LongHash;
+import org.bukkit.craftbukkit.util.LongHashSet;
+import org.bukkit.craftbukkit.util.LongObjectHashMap;
+import org.bukkit.event.world.ChunkUnloadEvent;
+
+
+
+
+
+// CraftBukkit end
+// Cauldron start
+import cpw.mods.fml.common.FMLCommonHandler;
+import net.minecraft.server.MinecraftServer;
+import net.minecraftforge.cauldron.configuration.CauldronConfig;
+import net.minecraftforge.cauldron.CauldronHooks;
+// Cauldron end
+
 public class ChunkProviderServer implements IChunkProvider
 {
     private static final Logger logger = LogManager.getLogger();
-    private Set chunksToUnload = Collections.newSetFromMap(new ConcurrentHashMap());
-    private Chunk defaultEmptyChunk;
+    public LongHashSet chunksToUnload = new LongHashSet(); // LongHashSet
+    public Chunk defaultEmptyChunk;
     public IChunkProvider currentChunkProvider;
     public IChunkLoader currentChunkLoader;
-    public boolean loadChunkOnProvideRequest = true;
-    public LongHashMap loadedChunkHashMap = new LongHashMap();
-    public List loadedChunks = new ArrayList();
+    public boolean loadChunkOnProvideRequest = MinecraftServer.getServer().cauldronConfig.loadChunkOnRequest.getValue(); // Cauldron - if true, allows mods to force load chunks. to disable, set load-chunk-on-request in cauldron.yml to false
+    public int initialTick; // Cauldron counter to keep track of when this loader was created
+    public kcauldron.ChunkManager chunkManager = new kcauldron.ChunkManager();
+    public List loadedChunks = new ArrayList(); // Cauldron - vanilla compatibility
     public WorldServer worldObj;
     private Set<Long> loadingChunks = com.google.common.collect.Sets.newHashSet();
+    public LongHashMap loadedChunkHashMap = new kcauldron.wrapper.VanillaChunkHashMap(chunkManager); // KCauldron - vanilla/mystcraft compatibility
     private static final String __OBFID = "CL_00001436";
 
     public ChunkProviderServer(WorldServer p_i1520_1_, IChunkLoader p_i1520_2_, IChunkProvider p_i1520_3_)
     {
+        this.initialTick = MinecraftServer.currentTick; // Cauldron keep track of when the loader was created
         this.defaultEmptyChunk = new EmptyChunk(p_i1520_1_, 0, 0);
         this.worldObj = p_i1520_1_;
         this.currentChunkLoader = p_i1520_2_;
@@ -57,16 +94,22 @@
 
     public boolean chunkExists(int p_73149_1_, int p_73149_2_)
     {
-        return this.loadedChunkHashMap.containsItem(ChunkCoordIntPair.chunkXZ2Int(p_73149_1_, p_73149_2_));
+        return this.chunkManager.chunkExists(p_73149_1_, p_73149_2_); // KCauldron
     }
 
-    public List func_152380_a()
+    public List func_152380_a() // Vanilla compatibility
     {
         return this.loadedChunks;
     }
 
     public void unloadChunksIfNotNearSpawn(int p_73241_1_, int p_73241_2_)
     {
+        // PaperSpigot start - Asynchronous lighting updates
+        Chunk chunk = this.chunkManager.getChunk(p_73241_1_, p_73241_2_); // KCauldron
+        if (chunk != null && chunk.worldObj.spigotConfig.useAsyncLighting && (chunk.pendingLightUpdates.get() > 0 || chunk.worldObj.getTotalWorldTime() - chunk.lightUpdateTime < 20)) {
+            return;
+        }
+        // PaperSpigot end
         if (this.worldObj.provider.canRespawnHere() && DimensionManager.shouldLoadSpawn(this.worldObj.provider.dimensionId))
         {
             ChunkCoordinates chunkcoordinates = this.worldObj.getSpawnPoint();
@@ -74,26 +117,52 @@
             int l = p_73241_2_ * 16 + 8 - chunkcoordinates.posZ;
             short short1 = 128;
 
+            // CraftBukkit start
             if (k < -short1 || k > short1 || l < -short1 || l > short1)
             {
-                this.chunksToUnload.add(Long.valueOf(ChunkCoordIntPair.chunkXZ2Int(p_73241_1_, p_73241_2_)));
+                this.chunksToUnload.add(p_73241_1_, p_73241_2_);
+                // Chunk c = this.loadedChunkHashMap_KC.get(LongHash.toLong(p_73241_1_, p_73241_2_));
+
+                if (chunk != null)
+                {
+                    chunk.mustSave = true;
+                }
+                CauldronHooks.logChunkUnload(this, p_73241_1_, p_73241_2_, "Chunk added to unload queue");
             }
+
+            // CraftBukkit end
         }
         else
         {
-            this.chunksToUnload.add(Long.valueOf(ChunkCoordIntPair.chunkXZ2Int(p_73241_1_, p_73241_2_)));
+            // CraftBukkit start
+            this.chunksToUnload.add(p_73241_1_, p_73241_2_);
+            //Chunk c = this.loadedChunkHashMap_KC.get(LongHash.toLong(p_73241_1_, p_73241_2_));
+
+            if (chunk != null)
+            {
+                chunk.mustSave = true;
+            }
+            CauldronHooks.logChunkUnload(this, p_73241_1_, p_73241_2_, "Chunk added to unload queue");
+            // CraftBukkit end
         }
     }
 
     public void unloadAllChunks()
     {
-        Iterator iterator = this.loadedChunks.iterator();
+        // KCauldron start
+        this.chunkManager.forEach(new cern.colt.function.ObjectProcedure() {
+            @Override
+            public boolean apply(Object arg) {
+                final Chunk chunk = (Chunk) arg;
+                unloadChunksIfNotNearSpawn(chunk.xPosition, chunk.zPosition);
+                return false;
+            }
+        });
+        // KCauldron end
+    }
 
-        while (iterator.hasNext())
-        {
-            Chunk chunk = (Chunk)iterator.next();
-            this.unloadChunksIfNotNearSpawn(chunk.xPosition, chunk.zPosition);
-        }
+    public Chunk getChunkIfLoaded(int x, int z) {
+        return this.chunkManager.getChunk(x, z); // KCauldron
     }
 
     public Chunk loadChunk(int p_73158_1_, int p_73158_2_)
@@ -103,9 +172,9 @@
 
     public Chunk loadChunk(int par1, int par2, Runnable runnable)
     {
-        long k = ChunkCoordIntPair.chunkXZ2Int(par1, par2);
-        this.chunksToUnload.remove(Long.valueOf(k));
-        Chunk chunk = (Chunk)this.loadedChunkHashMap.getValueByKey(k);
+        this.chunksToUnload.remove(par1, par2);
+        Chunk chunk = (Chunk) this.chunkManager.getChunk(par1, par2); // KCauldron
+        boolean newChunk = false;
         AnvilChunkLoader loader = null;
 
         if (this.currentChunkLoader instanceof AnvilChunkLoader)
@@ -113,6 +182,8 @@
             loader = (AnvilChunkLoader) this.currentChunkLoader;
         }
 
+        CauldronHooks.logChunkLoad(this, "Get", par1, par2, true);
+
         // We can only use the queue for already generated chunks
         if (chunk == null && loader != null && loader.chunkExists(this.worldObj, par1, par2))
         {
@@ -128,6 +199,12 @@
         }
         else if (chunk == null)
         {
+            // KCauldron start
+            if (runnable != null) {
+                kcauldron.ChunkGenerator.INSTANCE.queueChunkGeneration(this, par1, par2, new net.minecraftforge.common.chunkio.ChunkIOExecutor.RunnableCallback(runnable));
+                return null;
+            }
+            // KCauldron end
             chunk = this.originalLoadChunk(par1, par2);
         }
 
@@ -142,18 +219,20 @@
 
     public Chunk originalLoadChunk(int p_73158_1_, int p_73158_2_)
     {
-        long k = ChunkCoordIntPair.chunkXZ2Int(p_73158_1_, p_73158_2_);
-        this.chunksToUnload.remove(Long.valueOf(k));
-        Chunk chunk = (Chunk)this.loadedChunkHashMap.getValueByKey(k);
+        generatorLock.lock(); try { // KCauldron
+        this.chunksToUnload.remove(p_73158_1_, p_73158_2_);
+        Chunk chunk = (Chunk) this.chunkManager.getChunk(p_73158_1_, p_73158_2_); // KCauldron
+        boolean newChunk = false; // CraftBukkit
 
         if (chunk == null)
         {
-            boolean added = loadingChunks.add(k);
+            worldObj.timings.syncChunkLoadTimer.startTiming(); // Spigot
+            boolean added = loadingChunks.add(LongHash.toLong(p_73158_1_, p_73158_2_));
             if (!added)
             {
                 cpw.mods.fml.common.FMLLog.bigWarning("There is an attempt to load a chunk (%d,%d) in dimension %d that is already being loaded. This will cause weird chunk breakages.", p_73158_1_, p_73158_2_, worldObj.provider.dimensionId);
             }
-            chunk = ForgeChunkManager.fetchDormantChunk(k, this.worldObj);
+            chunk = ForgeChunkManager.fetchDormantChunk(LongHash.toLong(p_73158_1_, p_73158_2_), this.worldObj);
             if (chunk == null)
             {
                 chunk = this.safeLoadChunk(p_73158_1_, p_73158_2_);
@@ -176,30 +255,84 @@
                         CrashReport crashreport = CrashReport.makeCrashReport(throwable, "Exception generating new chunk");
                         CrashReportCategory crashreportcategory = crashreport.makeCategory("Chunk to be generated");
                         crashreportcategory.addCrashSection("Location", String.format("%d,%d", new Object[] {Integer.valueOf(p_73158_1_), Integer.valueOf(p_73158_2_)}));
-                        crashreportcategory.addCrashSection("Position hash", Long.valueOf(k));
+                        crashreportcategory.addCrashSection("Position hash", LongHash.toLong(p_73158_1_, p_73158_2_));
                         crashreportcategory.addCrashSection("Generator", this.currentChunkProvider.makeString());
                         throw new ReportedException(crashreport);
                     }
                 }
+
+                newChunk = true; // CraftBukkit
             }
 
-            this.loadedChunkHashMap.add(k, chunk);
-            this.loadedChunks.add(chunk);
-            loadingChunks.remove(k);
-            chunk.onChunkLoad();
+            this.chunkManager.putChunk(chunk, p_73158_1_, p_73158_2_); // KCauldron
+            this.loadedChunks.add(chunk); // Cauldron - vanilla compatibility
+            loadingChunks.remove(LongHash.toLong(p_73158_1_, p_73158_2_)); // Cauldron - LongHash
+
+            if (chunk != null)
+            {
+                chunk.onChunkLoad();
+            }
+            // CraftBukkit start
+            Server server = this.worldObj.getServer();
+
+            if (server != null)
+            {
+                /*
+                 * If it's a new world, the first few chunks are generated inside
+                 * the World constructor. We can't reliably alter that, so we have
+                 * no way of creating a CraftWorld/CraftServer at that point.
+                 */
+                server.getPluginManager().callEvent(new org.bukkit.event.world.ChunkLoadEvent(chunk.bukkitChunk, newChunk));
+            }
+
+            // Update neighbor counts
+            for (int x = -2; x < 3; x++) {
+                for (int z = -2; z < 3; z++) {
+                    if (x == 0 && z == 0) {
+                        continue;
+                    }
+
+                    Chunk neighbor = this.getChunkIfLoaded(chunk.xPosition + x, chunk.zPosition + z);
+                    if (neighbor != null) {
+                        neighbor.setNeighborLoaded(-x, -z);
+                        chunk.setNeighborLoaded(x, z);
+                    }
+                }
+            }
+            // CraftBukkit end
             chunk.populateChunk(this, this, p_73158_1_, p_73158_2_);
+            worldObj.timings.syncChunkLoadTimer.stopTiming(); // Spigot
         }
 
         return chunk;
+        } finally { generatorLock.unlock(); } // KCauldron
     }
 
     public Chunk provideChunk(int p_73154_1_, int p_73154_2_)
     {
-        Chunk chunk = (Chunk)this.loadedChunkHashMap.getValueByKey(ChunkCoordIntPair.chunkXZ2Int(p_73154_1_, p_73154_2_));
-        return chunk == null ? (!this.worldObj.findingSpawnPoint && !this.loadChunkOnProvideRequest ? this.defaultEmptyChunk : this.loadChunk(p_73154_1_, p_73154_2_)) : chunk;
+        // CraftBukkit start
+        Chunk chunk = this.chunkManager.getChunk(p_73154_1_, p_73154_2_); // KCauldron
+        chunk = chunk == null ? (shouldLoadChunk() ? this.loadChunk(p_73154_1_, p_73154_2_) : this.defaultEmptyChunk) : chunk; // Cauldron handle forge server tick events and load the chunk within 5 seconds of the world being loaded (for chunk loaders)
+
+        if (chunk == this.defaultEmptyChunk)
+        {
+            return chunk;
+        }
+
+        if ((p_73154_1_ != chunk.xPosition || p_73154_2_ != chunk.zPosition) && !worldObj.isProfilingWorld())
+        {
+            logger.error("Chunk (" + chunk.xPosition + ", " + chunk.zPosition + ") stored at  (" + p_73154_1_ + ", " + p_73154_2_ + ") in world '" + worldObj.getWorld().getName() + "'");
+            logger.error(chunk.getClass().getName());
+            Throwable ex = new Throwable();
+            ex.fillInStackTrace();
+            ex.printStackTrace();
+        }
+        chunk.lastAccessedTick = MinecraftServer.getServer().getTickCounter(); // Cauldron
+        return chunk;
+        // CraftBukkit end
     }
 
-    private Chunk safeLoadChunk(int p_73239_1_, int p_73239_2_)
+    public Chunk safeLoadChunk(int p_73239_1_, int p_73239_2_) // CraftBukkit - private -> public
     {
         if (this.currentChunkLoader == null)
         {
@@ -209,6 +342,7 @@
         {
             try
             {
+                CauldronHooks.logChunkLoad(this, "Safe Load", p_73239_1_, p_73239_2_, false); // Cauldron
                 Chunk chunk = this.currentChunkLoader.loadChunk(this.worldObj, p_73239_1_, p_73239_2_);
 
                 if (chunk != null)
@@ -217,8 +351,11 @@
 
                     if (this.currentChunkProvider != null)
                     {
+                        worldObj.timings.syncChunkLoadStructuresTimer.startTiming(); // Spigot
                         this.currentChunkProvider.recreateStructures(p_73239_1_, p_73239_2_);
+                        worldObj.timings.syncChunkLoadStructuresTimer.stopTiming(); // Spigot
                     }
+                    chunk.lastAccessedTick = MinecraftServer.getServer().getTickCounter(); // Cauldron
                 }
 
                 return chunk;
@@ -231,7 +368,7 @@
         }
     }
 
-    private void safeSaveExtraChunkData(Chunk p_73243_1_)
+    public void safeSaveExtraChunkData(Chunk p_73243_1_)   // CraftBukkit - private -> public
     {
         if (this.currentChunkLoader != null)
         {
@@ -246,7 +383,7 @@
         }
     }
 
-    private void safeSaveChunk(Chunk p_73242_1_)
+    public void safeSaveChunk(Chunk p_73242_1_)   // CraftBukkit - private -> public
     {
         if (this.currentChunkLoader != null)
         {
@@ -254,15 +391,18 @@
             {
                 p_73242_1_.lastSaveTime = this.worldObj.getTotalWorldTime();
                 this.currentChunkLoader.saveChunk(this.worldObj, p_73242_1_);
+                // CraftBukkit start - IOException to Exception
             }
-            catch (IOException ioexception)
+            catch (Exception ioexception)
             {
                 logger.error("Couldn\'t save chunk", ioexception);
             }
+            /* Remove extra exception
             catch (MinecraftException minecraftexception)
             {
                 logger.error("Couldn\'t save chunk; already in use by another instance of Minecraft?", minecraftexception);
             }
+            // CraftBukkit end */
         }
     }
 
@@ -277,6 +417,35 @@
             if (this.currentChunkProvider != null)
             {
                 this.currentChunkProvider.populate(p_73153_1_, p_73153_2_, p_73153_3_);
+                // CraftBukkit start
+                BlockSand.fallInstantly = true;
+                Random random = new Random();
+                random.setSeed(worldObj.getSeed());
+                long xRand = random.nextLong() / 2L * 2L + 1L;
+                long zRand = random.nextLong() / 2L * 2L + 1L;
+                random.setSeed((long) p_73153_2_ * xRand + (long) p_73153_3_ * zRand ^ worldObj.getSeed());
+                org.bukkit.World world = this.worldObj.getWorld();
+
+                if (world != null)
+                {
+                    this.worldObj.populating = true;
+
+                    try
+                    {
+                        for (org.bukkit.generator.BlockPopulator populator : world.getPopulators())
+                        {
+                            populator.populate(world, random, chunk.bukkitChunk);
+                        }
+                    }
+                    finally
+                    {
+                        this.worldObj.populating = false;
+                    }
+                }
+
+                BlockSand.fallInstantly = false;
+                this.worldObj.getServer().getPluginManager().callEvent(new org.bukkit.event.world.ChunkPopulateEvent(chunk.bukkitChunk));
+                // CraftBukkit end
                 GameRegistry.generateWorld(p_73153_2_, p_73153_3_, worldObj, currentChunkProvider, p_73153_1_);
                 chunk.setChunkModified();
             }
@@ -286,11 +455,13 @@
     public boolean saveChunks(boolean p_73151_1_, IProgressUpdate p_73151_2_)
     {
         int i = 0;
-        ArrayList arraylist = Lists.newArrayList(this.loadedChunks);
+        // Cauldron start - use thread-safe method for iterating loaded chunks
+        Object[] chunks = this.loadedChunks.toArray();
 
-        for (int j = 0; j < arraylist.size(); ++j)
+        for (int j = 0; j < chunks.length; ++j)
         {
-            Chunk chunk = (Chunk)arraylist.get(j);
+            Chunk chunk = (Chunk)chunks[j];
+            //Cauldron end
 
             if (p_73151_1_)
             {
@@ -325,36 +496,73 @@
     {
         if (!this.worldObj.levelSaving)
         {
-            for (ChunkCoordIntPair forced : this.worldObj.getPersistentChunks().keySet())
+            // Cauldron start - remove any chunk that has a ticket associated with it
+            if (!this.chunksToUnload.isEmpty())
             {
-                this.chunksToUnload.remove(ChunkCoordIntPair.chunkXZ2Int(forced.chunkXPos, forced.chunkZPos));
+                for (ChunkCoordIntPair forcedChunk : this.worldObj.getPersistentChunks().keys())
+                {
+                    this.chunksToUnload.remove(forcedChunk.chunkXPos, forcedChunk.chunkZPos);
+                }
             }
+            // Cauldron end
+            // CraftBukkit start
+            Server server = this.worldObj.getServer();
 
-            for (int i = 0; i < 100; ++i)
+            for (int i = 0; i < 100 && !this.chunksToUnload.isEmpty(); i++)
             {
-                if (!this.chunksToUnload.isEmpty())
+                long chunkcoordinates = this.chunksToUnload.popFirst();
+                Chunk chunk = this.chunkManager.getChunk(LongHash.msw(chunkcoordinates), LongHash.lsw(chunkcoordinates));
+
+                if (chunk == null)
                 {
-                    Long olong = (Long)this.chunksToUnload.iterator().next();
-                    Chunk chunk = (Chunk)this.loadedChunkHashMap.getValueByKey(olong.longValue());
+                    continue;
+                }
 
-                    if (chunk != null)
-                    {
-                        chunk.onChunkUnload();
-                        this.safeSaveChunk(chunk);
-                        this.safeSaveExtraChunkData(chunk);
-                        this.loadedChunks.remove(chunk);
-                        ForgeChunkManager.putDormantChunk(ChunkCoordIntPair.chunkXZ2Int(chunk.xPosition, chunk.zPosition), chunk);
-                        if(loadedChunks.size() == 0 && ForgeChunkManager.getPersistentChunksFor(this.worldObj).size() == 0 && !DimensionManager.shouldLoadSpawn(this.worldObj.provider.dimensionId)){
-                            DimensionManager.unloadWorld(this.worldObj.provider.dimensionId);
-                            return currentChunkProvider.unloadQueuedChunks();
+                // Cauldron static - check if the chunk was accessed recently and keep it loaded if there are players in world
+                /*if (!shouldUnloadChunk(chunk) && this.worldObj.playerEntities.size() > 0)
+                {
+                    CauldronHooks.logChunkUnload(this, chunk.xPosition, chunk.zPosition, "** Chunk kept from unloading due to recent activity");
+                    continue;
+                }*/
+                // Cauldron end
+
+
+                ChunkUnloadEvent event = new ChunkUnloadEvent(chunk.bukkitChunk);
+                server.getPluginManager().callEvent(event);
+
+                if (!event.isCancelled())
+                {
+                    CauldronHooks.logChunkUnload(this, chunk.xPosition, chunk.zPosition, "Unloading Chunk at");
+
+                    chunk.onChunkUnload();
+                    this.safeSaveChunk(chunk);
+                    this.safeSaveExtraChunkData(chunk);
+                    // Update neighbor counts
+                    for (int x = -2; x < 3; x++) {
+                        for (int z = -2; z < 3; z++) {
+                            if (x == 0 && z == 0) {
+                                continue;
+                            }
+
+                            Chunk neighbor = this.getChunkIfLoaded(chunk.xPosition + x, chunk.zPosition + z);
+                            if (neighbor != null) {
+                                neighbor.setNeighborUnloaded(-x, -z);
+                                chunk.setNeighborUnloaded(x, z);
+                            }
                         }
                     }
-
-                    this.chunksToUnload.remove(olong);
-                    this.loadedChunkHashMap.remove(olong.longValue());
+                    this.chunkManager.remove(chunk.xPosition, chunk.zPosition); // KCauldron
+                    this.loadedChunks.remove(chunk); // Cauldron - vanilla compatibility
+                    ForgeChunkManager.putDormantChunk(chunkcoordinates, chunk);
+                    if(this.chunkManager.size() == 0 && ForgeChunkManager.getPersistentChunksFor(this.worldObj).size() == 0 && !DimensionManager.shouldLoadSpawn(this.worldObj.provider.dimensionId)){
+                        DimensionManager.unloadWorld(this.worldObj.provider.dimensionId);
+                        return currentChunkProvider.unloadQueuedChunks();
+                    }
                 }
             }
 
+            // CraftBukkit end
+
             if (this.currentChunkLoader != null)
             {
                 this.currentChunkLoader.chunkTick();
@@ -371,7 +579,7 @@
 
     public String makeString()
     {
-        return "ServerChunkCache: " + this.loadedChunkHashMap.getNumHashElements() + " Drop: " + this.chunksToUnload.size();
+        return "ServerChunkCache: " + this.chunkManager.size() + " Drop: " + this.chunksToUnload.size(); // Cauldron
     }
 
     public List getPossibleCreatures(EnumCreatureType p_73155_1_, int p_73155_2_, int p_73155_3_, int p_73155_4_)
@@ -386,8 +594,53 @@
 
     public int getLoadedChunkCount()
     {
-        return this.loadedChunkHashMap.getNumHashElements();
+        return this.chunkManager.size(); // KCauldron
     }
 
     public void recreateStructures(int p_82695_1_, int p_82695_2_) {}
+
+    // Cauldron start
+    private boolean shouldLoadChunk()
+    {
+        return this.worldObj.findingSpawnPoint ||
+                this.loadChunkOnProvideRequest ||
+                (MinecraftServer.callingForgeTick && MinecraftServer.getServer().cauldronConfig.loadChunkOnForgeTick.getValue()) ||
+                (MinecraftServer.currentTick - initialTick <= 100);
+    }
+
+    public long lastAccessed(int x, int z)
+    {
+        final Chunk chunk = this.chunkManager.getChunk(x, z); // KCauldron
+        return chunk == null ? 0 : chunk.lastAccessedTick; // KCauldron
+    }
+
+    /*private boolean shouldUnloadChunk(Chunk chunk)
+    {
+        if (chunk == null) return false;
+        return MinecraftServer.getServer().getTickCounter() - chunk.lastAccessedTick > CauldronConfig.chunkGCGracePeriod.getValue();
+    }*/
+    // Cauldron end
+    // KCauldron start
+    private final java.util.concurrent.locks.Lock generatorLock = new java.util.concurrent.locks.ReentrantLock();
+    
+    public boolean loadAsync(int x, int z, boolean generateOnRequest, kcauldron.ChunkCallback callback) {
+        Chunk chunk = getChunkIfLoaded(x, z);
+        if (chunk != null) {
+            callback.onChunkLoaded(chunk);
+        } else if (((net.minecraft.world.chunk.storage.AnvilChunkLoader) currentChunkLoader).chunkExists(worldObj, x, z)) {
+            net.minecraftforge.common.chunkio.ChunkIOExecutor.queueChunkLoad(this.worldObj,
+                    (net.minecraft.world.chunk.storage.AnvilChunkLoader) currentChunkLoader, this, x, z, callback);
+        } else if (generateOnRequest) {
+            callback.onChunkLoaded(originalLoadChunk(x, z));
+        } else {
+            return false;
+        }
+        return true;
+    }
+
+    public void loadAsync(int x, int z, kcauldron.ChunkCallback callback) {
+        if (!loadAsync(x, z, false, callback))
+            kcauldron.ChunkGenerator.INSTANCE.queueChunkGeneration(this, x, z, callback);
+    }
+    // KCauldron end
 }