[Memory-opti:fix leak] Fix World leak in WirelessChargerController (#212)

src/main/java/crazypants/enderio/CommonProxy.java

@@ -1,7 +1,5 @@
 package crazypants.enderio;
 
-import java.text.DecimalFormat;
-
 import net.minecraft.entity.player.EntityPlayer;
 import net.minecraft.potion.Potion;
 import net.minecraft.potion.PotionEffect;
@@ -21,15 +19,15 @@ import crazypants.enderio.conduit.IConduit;
 import crazypants.enderio.conduit.render.ConduitRenderer;
 import crazypants.enderio.machine.hypercube.HyperCubeRegister;
 import crazypants.enderio.machine.transceiver.ServerChannelRegister;
+import crazypants.enderio.machine.wireless.WirelessChargerController;
 
 public class CommonProxy {
 
-    private static final DecimalFormat FORMAT = new DecimalFormat("########0.000");
-
     protected long serverTickCount = 0;
     protected long clientTickCount = 0;
     protected final TickTimer tickTimer = new TickTimer();
     public ConduitNetworkTickHandler conduitNetworkTickHandler = null;
+    public WirelessChargerController wirelessChargerController = null;
 
     public CommonProxy() {}
 
@@ -86,6 +84,8 @@ public class CommonProxy {
     public void onServerAboutToStart(FMLServerAboutToStartEvent event) {
         conduitNetworkTickHandler = new ConduitNetworkTickHandler();
         FMLCommonHandler.instance().bus().register(conduitNetworkTickHandler);
+        wirelessChargerController = new WirelessChargerController();
+        FMLCommonHandler.instance().bus().register(wirelessChargerController);
     }
 
     public void onServerStarted(FMLServerStartedEvent event) {
@@ -97,6 +97,8 @@ public class CommonProxy {
         HyperCubeRegister.unload();
         FMLCommonHandler.instance().bus().unregister(conduitNetworkTickHandler);
         conduitNetworkTickHandler = null;
+        FMLCommonHandler.instance().bus().unregister(wirelessChargerController);
+        wirelessChargerController = null;
     }
 
     public final class TickTimer {

src/main/java/crazypants/enderio/machine/wireless/TileWirelessCharger.java

@@ -6,6 +6,7 @@ import net.minecraft.world.World;
 import net.minecraftforge.common.util.ForgeDirection;
 
 import cofh.api.energy.IEnergyContainerItem;
+import crazypants.enderio.EnderIO;
 import crazypants.enderio.TileEntityEio;
 import crazypants.enderio.network.PacketHandler;
 import crazypants.enderio.power.IInternalPowerReceiver;
@@ -28,7 +29,7 @@ public class TileWirelessCharger extends TileEntityEio implements IInternalPower
     @Override
     public void invalidate() {
         super.invalidate();
-        WirelessChargerController.instance.deregisterCharger(this);
+        EnderIO.proxy.wirelessChargerController.deregisterCharger(this);
         registered = false;
     }
 
@@ -40,7 +41,7 @@ public class TileWirelessCharger extends TileEntityEio implements IInternalPower
         }
 
         if (!registered) {
-            WirelessChargerController.instance.registerCharger(this);
+            EnderIO.proxy.wirelessChargerController.registerCharger(this);
             registered = true;
         }
 

src/main/java/crazypants/enderio/machine/wireless/WirelessChargedLocation.java

@@ -1,8 +1,6 @@
 package crazypants.enderio.machine.wireless;
 
 import java.util.ArrayList;
-import java.util.Collections;
-import java.util.Comparator;
 import java.util.List;
 
 import net.minecraft.item.ItemStack;
@@ -10,6 +8,8 @@ import net.minecraft.tileentity.TileEntity;
 
 import com.enderio.core.common.util.BlockCoord;
 
+import crazypants.enderio.EnderIO;
+
 public class WirelessChargedLocation {
 
     private final TileEntity te;
@@ -18,34 +18,30 @@ public class WirelessChargedLocation {
 
     public WirelessChargedLocation(TileEntity te) {
         this.te = te;
-        this.chargers = new ArrayList<IWirelessCharger>();
+        this.chargers = new ArrayList<>();
         /*
          * Set lastChangeCount to one less than the current change count so that the charger list is updated on first
          * use (unless ~4B changes happen in between). Do this instead directly updating so that WirelessChargedLocation
          * can be used while the TileEntity is still in construction (or loading).
          */
-        this.lastChangeCount = WirelessChargerController.instance.getChangeCount() - 1;
+        this.lastChangeCount = EnderIO.proxy.wirelessChargerController.getChangeCount() - 1;
     }
 
     private void updateChargers() {
-        WirelessChargerController wcc = WirelessChargerController.instance;
+        WirelessChargerController wcc = EnderIO.proxy.wirelessChargerController;
         chargers.clear();
         lastChangeCount = wcc.getChangeCount();
         final BlockCoord bc = new BlockCoord(te);
         wcc.getChargers(te.getWorldObj(), bc, chargers);
-        Collections.sort(chargers, new Comparator<IWirelessCharger>() {
-
-            @Override
-            public int compare(IWirelessCharger o1, IWirelessCharger o2) {
-                int dist1 = o1.getLocation().getDistSq(bc);
-                int dist2 = o2.getLocation().getDistSq(bc);
-                return dist1 - dist2;
-            }
+        chargers.sort((o1, o2) -> {
+            int dist1 = o1.getLocation().getDistSq(bc);
+            int dist2 = o2.getLocation().getDistSq(bc);
+            return dist1 - dist2;
         });
     }
 
     private void checkChangeCount() {
-        if (lastChangeCount != WirelessChargerController.instance.getChangeCount()) {
+        if (lastChangeCount != EnderIO.proxy.wirelessChargerController.getChangeCount()) {
             updateChargers();
         }
     }

src/main/java/crazypants/enderio/machine/wireless/WirelessChargerController.java

@@ -8,11 +8,9 @@ import net.minecraft.entity.player.EntityPlayer;
 import net.minecraft.inventory.IInventory;
 import net.minecraft.item.ItemStack;
 import net.minecraft.world.World;
-import net.minecraftforge.common.MinecraftForge;
 
 import com.enderio.core.common.util.BlockCoord;
 
-import cpw.mods.fml.common.FMLCommonHandler;
 import cpw.mods.fml.common.eventhandler.SubscribeEvent;
 import cpw.mods.fml.common.gameevent.TickEvent;
 import cpw.mods.fml.relauncher.Side;
@@ -21,20 +19,17 @@ import crazypants.util.BaublesUtil;
 
 public class WirelessChargerController {
 
-    public static WirelessChargerController instance = new WirelessChargerController();
-
-    public static final int RANGE = Config.wirelessChargerRange;
-    public static final int RANGE_SQ = RANGE * RANGE;
-
-    static {
-        FMLCommonHandler.instance().bus().register(WirelessChargerController.instance);
-        MinecraftForge.EVENT_BUS.register(WirelessChargerController.instance);
-    }
-
+    private static final int RANGE = Config.wirelessChargerRange;
+    private static final int RANGE_SQ = RANGE * RANGE;
     private final Map<Integer, Map<BlockCoord, IWirelessCharger>> perWorldChargers = new HashMap<Integer, Map<BlockCoord, IWirelessCharger>>();
     private int changeCount;
 
-    private WirelessChargerController() {}
+    @SubscribeEvent
+    public void onPlayerTick(TickEvent.PlayerTickEvent event) {
+        if (event.side != Side.CLIENT && event.phase == TickEvent.Phase.END) {
+            chargePlayersItems(event.player);
+        }
+    }
 
     public void registerCharger(IWirelessCharger charger) {
         if (charger == null) {
@@ -54,28 +49,7 @@ public class WirelessChargerController {
         changeCount++;
     }
 
-    @SubscribeEvent
-    public void onPlayerTick(TickEvent.PlayerTickEvent event) {
-        if (event.side == Side.CLIENT || event.phase != TickEvent.Phase.END) {
-            return;
-        }
-        chargePlayersItems(event.player);
-    }
-
-    public int getChangeCount() {
-        return changeCount;
-    }
-
-    public void getChargers(World world, BlockCoord bc, Collection<IWirelessCharger> res) {
-        Map<BlockCoord, IWirelessCharger> chargers = getChargersForWorld(world);
-        for (IWirelessCharger wc : chargers.values()) {
-            if (wc.getLocation().getDistSq(bc) <= RANGE_SQ) {
-                res.add(wc);
-            }
-        }
-    }
-
-    public void chargePlayersItems(EntityPlayer player) {
+    private void chargePlayersItems(EntityPlayer player) {
         Map<BlockCoord, IWirelessCharger> chargers = getChargersForWorld(player.worldObj);
         if (chargers.isEmpty()) {
             return;
@@ -108,13 +82,21 @@ public class WirelessChargerController {
         return res;
     }
 
-    private Map<BlockCoord, IWirelessCharger> getChargersForWorld(World world) {
-        Map<BlockCoord, IWirelessCharger> res = perWorldChargers.get(world.provider.dimensionId);
-        if (res == null) {
-            res = new HashMap<BlockCoord, IWirelessCharger>();
-            perWorldChargers.put(world.provider.dimensionId, res);
+    public int getChangeCount() {
+        return changeCount;
+    }
+
+    public void getChargers(World world, BlockCoord bc, Collection<IWirelessCharger> res) {
+        Map<BlockCoord, IWirelessCharger> chargers = getChargersForWorld(world);
+        for (IWirelessCharger wc : chargers.values()) {
+            if (wc.getLocation().getDistSq(bc) <= RANGE_SQ) {
+                res.add(wc);
+            }
         }
-        return res;
+    }
+
+    private Map<BlockCoord, IWirelessCharger> getChargersForWorld(World world) {
+        return perWorldChargers.computeIfAbsent(world.provider.dimensionId, k -> new HashMap<>());
     }
 
     public Collection<IWirelessCharger> getChargers(World world) {