249 lines
9.2 KiB
Diff
249 lines
9.2 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Aikar <aikar@aikar.co>
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Date: Mon, 17 Sep 2018 23:37:31 -0400
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Subject: [PATCH] Optimize Server World Map
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Minecraft moved worlds to a hashmap in 1.13.1.
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This creates inconsistent order for iteration of the map.
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This patch restores World management to be back as an Array.
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.values() will allow us to iterate as it was pre 1.13.1 by
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ArrayList, giving consistent ordering and effecient iteration performance.
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KeySet and EntrySet iteration is proxied to the List iterator,
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and should retain manipulation behavior but nothing should be doing that.
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Getting a World by dimension ID is now back a constant time operation.
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Hopefully no other plugins try to mess with this map, as we are only handling
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known NMS used methods, but we can add more if naughty plugins are found later.
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diff --git a/src/main/java/com/destroystokyo/paper/PaperWorldMap.java b/src/main/java/com/destroystokyo/paper/PaperWorldMap.java
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new file mode 100644
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index 0000000000000000000000000000000000000000..6bb2f98b4574bff7ac50ed44833726544f2c6011
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--- /dev/null
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+++ b/src/main/java/com/destroystokyo/paper/PaperWorldMap.java
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@@ -0,0 +1,191 @@
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+package com.destroystokyo.paper;
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+
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+import net.minecraft.server.DimensionManager;
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+import net.minecraft.server.WorldServer;
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+
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+import javax.annotation.Nonnull;
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+import java.util.AbstractSet;
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+import java.util.ArrayList;
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+import java.util.Collection;
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+import java.util.HashMap;
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+import java.util.Iterator;
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+import java.util.List;
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+import java.util.Map;
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+import java.util.Set;
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+
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+public class PaperWorldMap extends HashMap<DimensionManager, WorldServer> {
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+ private final List<WorldServer> worlds = new ArrayList<>();
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+ private final List<WorldServer> worldsIterable = new ArrayList<WorldServer>() {
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+ @Override
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+ public Iterator<WorldServer> iterator() {
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+ Iterator<WorldServer> iterator = super.iterator();
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+ return new Iterator<WorldServer>() {
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+ private WorldServer last;
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+
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+ @Override
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+ public boolean hasNext() {
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+ return iterator.hasNext();
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+ }
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+
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+ @Override
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+ public WorldServer next() {
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+ this.last = iterator.next();
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+ return last;
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+ }
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+
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+ @Override
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+ public void remove() {
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+ worlds.set(last.worldProvider.getDimensionManager().getDimensionID() + 1, null);
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+ }
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+ };
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+ }
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+ };
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+ @Override
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+ public int size() {
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+ return worldsIterable.size();
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+ }
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+
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+ @Override
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+ public boolean isEmpty() {
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+ return worldsIterable.isEmpty();
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+ }
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+
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+ @Override
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+ public WorldServer get(Object key) {
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+ // Will hit the below method
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+ return key instanceof DimensionManager ? get((DimensionManager) key) : null;
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+ }
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+
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+ public WorldServer get(DimensionManager key) {
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+ int id = key.getDimensionID()+1;
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+ return worlds.size() > id ? worlds.get(id) : null;
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+ }
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+
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+ @Override
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+ public boolean containsKey(Object key) {
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+ // will hit below method
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+ return key instanceof DimensionManager && containsKey((DimensionManager) key);
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+ }
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+ public boolean containsKey(DimensionManager key) {
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+ return get(key) != null;
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+ }
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+
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+ @Override
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+ public WorldServer put(DimensionManager key, WorldServer value) {
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+ while (worlds.size() <= key.getDimensionID()+1) {
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+ worlds.add(null);
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+ }
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+ WorldServer old = worlds.set(key.getDimensionID()+1, value);
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+ if (old != null) {
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+ worldsIterable.remove(old);
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+ }
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+ worldsIterable.add(value);
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+ return old;
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+ }
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+
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+ @Override
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+ public void putAll(Map<? extends DimensionManager, ? extends WorldServer> m) {
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+ for (Entry<? extends DimensionManager, ? extends WorldServer> e : m.entrySet()) {
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+ put(e.getKey(), e.getValue());
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+ }
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+ }
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+
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+ @Override
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+ public WorldServer remove(Object key) {
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+ return key instanceof DimensionManager ? remove((DimensionManager) key) : null;
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+ }
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+
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+ public WorldServer remove(DimensionManager key) {
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+ WorldServer old;
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+ if (key.getDimensionID()+1 == worlds.size() - 1) {
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+ old = worlds.remove(key.getDimensionID()+1);
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+ } else {
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+ old = worlds.set(key.getDimensionID() + 1, null);
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+ }
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+ if (old != null) {
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+ worldsIterable.remove(old);
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+ }
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+ return old;
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+ }
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+
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+ @Override
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+ public void clear() {
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+ throw new RuntimeException("What the hell are you doing?");
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+ }
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+
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+ @Override
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+ public boolean containsValue(Object value) {
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+ return value instanceof WorldServer && get(((WorldServer) value).worldProvider.getDimensionManager()) != null;
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+ }
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+
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+ @Nonnull
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+ @Override
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+ public Set<DimensionManager> keySet() {
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+ return new AbstractSet<DimensionManager>() {
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+ @Override
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+ public Iterator<DimensionManager> iterator() {
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+ Iterator<WorldServer> iterator = worldsIterable.iterator();
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+ return new Iterator<DimensionManager>() {
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+
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+ @Override
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+ public boolean hasNext() {
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+ return iterator.hasNext();
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+ }
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+
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+ @Override
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+ public DimensionManager next() {
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+ return iterator.next().worldProvider.getDimensionManager();
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+ }
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+
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+ @Override
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+ public void remove() {
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+ iterator.remove();
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+ }
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+ };
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+ }
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+
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+ @Override
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+ public int size() {
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+ return worlds.size();
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+ }
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+ };
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+ }
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+
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+ @Override
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+ public Collection<WorldServer> values() {
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+ return worldsIterable;
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+ }
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+
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+ @Override
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+ public Set<Entry<DimensionManager, WorldServer>> entrySet() {
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+ return new AbstractSet<Entry<DimensionManager, WorldServer>>() {
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+ @Override
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+ public Iterator<Entry<DimensionManager, WorldServer>> iterator() {
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+ Iterator<WorldServer> iterator = worldsIterable.iterator();
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+ return new Iterator<Entry<DimensionManager, WorldServer>>() {
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+
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+ @Override
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+ public boolean hasNext() {
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+ return iterator.hasNext();
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+ }
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+
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+ @Override
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+ public Entry<DimensionManager, WorldServer> next() {
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+ WorldServer entry = iterator.next();
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+ return new SimpleEntry<>(entry.worldProvider.getDimensionManager(), entry);
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+ }
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+
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+ @Override
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+ public void remove() {
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+ iterator.remove();
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+ }
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+ };
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+ }
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+
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+ @Override
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+ public int size() {
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+ return worldsIterable.size();
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+ }
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+ };
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+ }
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+}
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diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
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index 85f989829b5ad1d7681b57cf68519a4806b26ea1..bbda856c148588402731c03cd166acd2e1f4eee3 100644
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--- a/src/main/java/net/minecraft/server/MinecraftServer.java
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+++ b/src/main/java/net/minecraft/server/MinecraftServer.java
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@@ -88,7 +88,7 @@ public abstract class MinecraftServer extends IAsyncTaskHandlerReentrant<TickTas
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public final DataFixer dataConverterManager;
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private String serverIp;
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private int serverPort = -1;
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- public final Map<DimensionManager, WorldServer> worldServer = Maps.newLinkedHashMap(); // CraftBukkit - keep order, k+v already use identity methods
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+ public final Map<DimensionManager, WorldServer> worldServer = new com.destroystokyo.paper.PaperWorldMap(); // Paper;
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private PlayerList playerList;
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private volatile boolean isRunning = true;
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private volatile boolean isRestarting = false; // Paper - flag to signify we're attempting to restart
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@@ -459,7 +459,7 @@ public abstract class MinecraftServer extends IAsyncTaskHandlerReentrant<TickTas
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}
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}
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this.a(this.getDifficulty(), true);
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- for (WorldServer worldserver : this.getWorlds()) {
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+ for (WorldServer worldserver : com.google.common.collect.Lists.newArrayList(this.getWorlds())) { // Paper - avoid como if 1 world triggers another world
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this.loadSpawn(worldserver.getChunkProvider().playerChunkMap.worldLoadListener, worldserver);
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this.server.getPluginManager().callEvent(new org.bukkit.event.world.WorldLoadEvent(worldserver.getWorld()));
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}
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@@ -607,7 +607,6 @@ public abstract class MinecraftServer extends IAsyncTaskHandlerReentrant<TickTas
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// this.nextTick = SystemUtils.getMonotonicMillis() + 10L;
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this.executeModerately();
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// Iterator iterator = DimensionManager.a().iterator();
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-
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if (true) {
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DimensionManager dimensionmanager = worldserver.worldProvider.getDimensionManager();
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ForcedChunk forcedchunk = (ForcedChunk) worldserver.getWorldPersistentData().b(ForcedChunk::new, "chunks");
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