Paper/Spigot-Server-Patches/0356-Optimize-Server-World-Map.patch

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From 6c00757284ea40b18a629c0be9fa09042496f06d Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Mon, 17 Sep 2018 23:37:31 -0400
Subject: [PATCH] Optimize Server World Map
Minecraft moved worlds to a hashmap in 1.13.1.
This creates inconsistent order for iteration of the map.
This patch restores World management to be back as an Array.
.values() will allow us to iterate as it was pre 1.13.1 by
ArrayList, giving consistent ordering and effecient iteration performance.
KeySet and EntrySet iteration is proxied to the List iterator,
and should retain manipulation behavior but nothing should be doing that.
Getting a World by dimension ID is now back a constant time operation.
Hopefully no other plugins try to mess with this map, as we are only handling
known NMS used methods, but we can add more if naughty plugins are found later.
diff --git a/src/main/java/com/destroystokyo/paper/PaperWorldMap.java b/src/main/java/com/destroystokyo/paper/PaperWorldMap.java
new file mode 100644
index 0000000000..af9e4455c6
--- /dev/null
+++ b/src/main/java/com/destroystokyo/paper/PaperWorldMap.java
@@ -0,0 +1,191 @@
+package com.destroystokyo.paper;
+
+import net.minecraft.server.DimensionManager;
+import net.minecraft.server.WorldServer;
+
+import javax.annotation.Nonnull;
+import java.util.AbstractSet;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+public class PaperWorldMap extends HashMap<DimensionManager, WorldServer> {
+ private final List<WorldServer> worlds = new ArrayList<>();
+ private final List<WorldServer> worldsIterable = new ArrayList<WorldServer>() {
+ @Override
+ public Iterator<WorldServer> iterator() {
+ Iterator<WorldServer> iterator = super.iterator();
+ return new Iterator<WorldServer>() {
+ private WorldServer last;
+
+ @Override
+ public boolean hasNext() {
+ return iterator.hasNext();
+ }
+
+ @Override
+ public WorldServer next() {
+ this.last = iterator.next();
+ return last;
+ }
+
+ @Override
+ public void remove() {
+ worlds.set(last.dimension.getDimensionID()+1, null);
+ }
+ };
+ }
+ };
+ @Override
+ public int size() {
+ return worldsIterable.size();
+ }
+
+ @Override
+ public boolean isEmpty() {
+ return worldsIterable.isEmpty();
+ }
+
+ @Override
+ public WorldServer get(Object key) {
+ // Will hit the below method
+ return key instanceof DimensionManager ? get((DimensionManager) key) : null;
+ }
+
+ public WorldServer get(DimensionManager key) {
+ int id = key.getDimensionID()+1;
+ return worlds.size() > id ? worlds.get(id) : null;
+ }
+
+ @Override
+ public boolean containsKey(Object key) {
+ // will hit below method
+ return key instanceof DimensionManager && containsKey((DimensionManager) key);
+ }
+ public boolean containsKey(DimensionManager key) {
+ return get(key) != null;
+ }
+
+ @Override
+ public WorldServer put(DimensionManager key, WorldServer value) {
+ while (worlds.size() <= key.getDimensionID()+1) {
+ worlds.add(null);
+ }
+ WorldServer old = worlds.set(key.getDimensionID()+1, value);
+ if (old != null) {
+ worldsIterable.remove(old);
+ }
+ worldsIterable.add(value);
+ return old;
+ }
+
+ @Override
+ public void putAll(Map<? extends DimensionManager, ? extends WorldServer> m) {
+ for (Entry<? extends DimensionManager, ? extends WorldServer> e : m.entrySet()) {
+ put(e.getKey(), e.getValue());
+ }
+ }
+
+ @Override
+ public WorldServer remove(Object key) {
+ return key instanceof DimensionManager ? remove((DimensionManager) key) : null;
+ }
+
+ public WorldServer remove(DimensionManager key) {
+ WorldServer old;
+ if (key.getDimensionID()+1 == worlds.size() - 1) {
+ old = worlds.remove(key.getDimensionID()+1);
+ } else {
+ old = worlds.set(key.getDimensionID() + 1, null);
+ }
+ if (old != null) {
+ worldsIterable.remove(old);
+ }
+ return old;
+ }
+
+ @Override
+ public void clear() {
+ throw new RuntimeException("What the hell are you doing?");
+ }
+
+ @Override
+ public boolean containsValue(Object value) {
+ return value instanceof WorldServer && get(((WorldServer) value).dimension) != null;
+ }
+
+ @Nonnull
+ @Override
+ public Set<DimensionManager> keySet() {
+ return new AbstractSet<DimensionManager>() {
+ @Override
+ public Iterator<DimensionManager> iterator() {
+ Iterator<WorldServer> iterator = worldsIterable.iterator();
+ return new Iterator<DimensionManager>() {
+
+ @Override
+ public boolean hasNext() {
+ return iterator.hasNext();
+ }
+
+ @Override
+ public DimensionManager next() {
+ return iterator.next().dimension;
+ }
+
+ @Override
+ public void remove() {
+ iterator.remove();
+ }
+ };
+ }
+
+ @Override
+ public int size() {
+ return worlds.size();
+ }
+ };
+ }
+
+ @Override
+ public Collection<WorldServer> values() {
+ return worldsIterable;
+ }
+
+ @Override
+ public Set<Entry<DimensionManager, WorldServer>> entrySet() {
+ return new AbstractSet<Entry<DimensionManager, WorldServer>>() {
+ @Override
+ public Iterator<Entry<DimensionManager, WorldServer>> iterator() {
+ Iterator<WorldServer> iterator = worldsIterable.iterator();
+ return new Iterator<Entry<DimensionManager, WorldServer>>() {
+
+ @Override
+ public boolean hasNext() {
+ return iterator.hasNext();
+ }
+
+ @Override
+ public Entry<DimensionManager, WorldServer> next() {
+ WorldServer entry = iterator.next();
+ return new SimpleEntry<>(entry.dimension, entry);
+ }
+
+ @Override
+ public void remove() {
+ iterator.remove();
+ }
+ };
+ }
+
+ @Override
+ public int size() {
+ return worldsIterable.size();
+ }
+ };
+ }
+}
diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
index 4543ac8f15..d2ee4e5781 100644
--- a/src/main/java/net/minecraft/server/MinecraftServer.java
+++ b/src/main/java/net/minecraft/server/MinecraftServer.java
Updated Upstream (Bukkit/CraftBukkit/Spigot) Upstream has released updates that appears to apply and compile correctly. This update has not been tested by PaperMC and as with ANY update, please do your own testing Warning: this commit contains more mapping changes from upstream, As always, ensure that you have working backups and test this build before deployment; Developers working on paper will, yet again, need to delete their work/Minecraft/1.13.2 folder Bukkit Changes: 7fca5fd4 SPIGOT-4558: Preserve user order in the face of copied defaults in configurations 15c9b1eb Ignore spurious slot IDs sent by client, e.g. in enchanting tables 5d2a10c5 SPIGOT-3747: Add API for force loaded chunks d6dd2bb3 SPIGOT-3538: Add getHitBlockFace for ProjectileHitEvent 771db4aa SPIGOT-794: Call EntityPlaceEvent for Minecart placement 55462509 Add InventoryView#getSlotType 2f3ce5b6 Remove EntityTransformEvent and CustomItemTagContainer from draft API f04ad7b6 Make ProjectileLaunchEvent extend EntitySpawnEvent ccb85808 Define EntitySpawnEvent b8cc3ebe Add PlayerItemDamageEvent 184a495d Ease ClassLoader Deadlocks Where Possible 11ac4728 Expand Boolean Prompt Values in Conversation API aae62d51 Added getAllSessionData() to the Conversation API. 9290ff91 Add InventoryView#getInventory API 995e530f Add API to get / set base arrow damage CraftBukkit Changes: c4a67eed SPIGOT-4556: Fix plugins closing inventory during drop events 5be2ddcb Replace version constants with methods to prevent compiler inlining a5b9c7b3 Use API method to create offset command completions 2bc7d1df SPIGOT-3747: Add API for force loaded chunks a408f375 SPIGOT-3538: Add getHitBlockFace for ProjectileHitEvent b54b9409 SPIGOT-2864: Make Arrow / Item setTicksLived behave like FallingBlock 79ded7a8 SPIGOT-1811: Death message not shown on respawn screen b4a4f15d SPIGOT-943: InventoryCloseEvent called on death regardless of open inventory 0afed592 SPIGOT-794: Call EntityPlaceEvent for Minecart placement 2b2d084a Add InventoryView#getSlotType 01a9959a Do not use deprecated ItemSpawnEvent constructor 9642498d SPIGOT-4547: Call EntitySpawnEvent as general spawn fallback event 963f4a5f Add PlayerItemDamageEvent 63db0445 Add API to get / set base arrow damage 531c25d7 Add CraftMagicNumbers.MAPPINGS_VERSION for use by NMS plugins d05c8b14 Mappings Update bd36e200 SPIGOT-4551: Ignore invalid attribute modifier slots Spigot Changes: 518206a1 Remove redundant trove depend 1959ad21 MC-11211,SPIGOT-4552: Fix placing double slabs at y = 255 29ab5e43 SPIGOT-3661: Allow arguments in restart-script 7cc46316 SPIGOT-852: Growth modifiers for beetroots, potatoes, carrots 82e117e1 Squelch "fatal: Resolve operation not in progress" message 0a1a68e7 Mappings Update & Patch Rebuild
2019-01-01 04:15:55 +01:00
@@ -82,7 +82,7 @@ public abstract class MinecraftServer implements IAsyncTaskHandler, IMojangStati
public final DataFixer dataConverterManager;
private String serverIp;
private int q = -1;
- public final Map<DimensionManager, WorldServer> worldServer = Maps.newLinkedHashMap(); // CraftBukkit - keep order, k+v already use identity methods
+ public final Map<DimensionManager, WorldServer> worldServer = new com.destroystokyo.paper.PaperWorldMap(); // Paper;
private PlayerList playerList;
private boolean isRunning = true;
private boolean isRestarting = false; // Paper - flag to signify we're attempting to restart
@@ -546,7 +546,7 @@ public abstract class MinecraftServer implements IAsyncTaskHandler, IMojangStati
}
}
- for (WorldServer world : this.getWorlds()) {
+ for (WorldServer world : com.google.common.collect.Lists.newArrayList(this.getWorlds())) { // Paper - avoid como if 1 world triggers another world
this.server.getPluginManager().callEvent(new org.bukkit.event.world.WorldLoadEvent(world.getWorld()));
}
// CraftBukkit end
--
2.21.0