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-rw-r--r--patches/server/0624-Entity-load-save-limit-per-chunk.patch110
1 files changed, 110 insertions, 0 deletions
diff --git a/patches/server/0624-Entity-load-save-limit-per-chunk.patch b/patches/server/0624-Entity-load-save-limit-per-chunk.patch
new file mode 100644
index 0000000000..1e6dba8513
--- /dev/null
+++ b/patches/server/0624-Entity-load-save-limit-per-chunk.patch
@@ -0,0 +1,110 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Jason Penilla <[email protected]>
+Date: Wed, 18 Nov 2020 20:52:25 -0800
+Subject: [PATCH] Entity load/save limit per chunk
+
+Adds a config option to limit the number of entities saved and loaded
+to a chunk. The default values of -1 disable the limit. Although
+defaults are only included for certain entites, this allows setting
+limits for any entity type.
+
+diff --git a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
+index f372caad76d5f59f37d073bb245fca3a037c2bef..1fc750c1f33d8f25a65cf286fd88fd21ab46c0ef 100644
+--- a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
++++ b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
+@@ -8,6 +8,8 @@ import it.unimi.dsi.fastutil.objects.Reference2IntMap;
+ import it.unimi.dsi.fastutil.objects.Reference2IntOpenHashMap;
+ import net.minecraft.world.entity.MobCategory;
+ import com.destroystokyo.paper.antixray.ChunkPacketBlockControllerAntiXray.EngineMode;
++import java.util.HashMap;
++import java.util.Map;
+ import org.bukkit.Bukkit;
+ import org.bukkit.configuration.file.YamlConfiguration;
+ import org.spigotmc.SpigotWorldConfig;
+@@ -140,6 +142,38 @@ public class PaperWorldConfig {
+ );
+ }
+
++ public Map<net.minecraft.world.entity.EntityType<?>, Integer> entityPerChunkSaveLimits = new HashMap<>();
++ private void entityPerChunkSaveLimits() {
++ getInt("entity-per-chunk-save-limit.experience_orb", -1);
++ getInt("entity-per-chunk-save-limit.snowball", -1);
++ getInt("entity-per-chunk-save-limit.ender_pearl", -1);
++ getInt("entity-per-chunk-save-limit.arrow", -1);
++ getInt("entity-per-chunk-save-limit.fireball", -1);
++ getInt("entity-per-chunk-save-limit.small_fireball", -1);
++
++ addEntityPerChunkSaveLimitsFromSection(config.getConfigurationSection("world-settings.default.entity-per-chunk-save-limit"), entityPerChunkSaveLimits);
++ addEntityPerChunkSaveLimitsFromSection(config.getConfigurationSection("world-settings." + worldName + ".entity-per-chunk-save-limit"), entityPerChunkSaveLimits);
++ }
++
++ private static void addEntityPerChunkSaveLimitsFromSection(final org.bukkit.configuration.ConfigurationSection section, final Map<net.minecraft.world.entity.EntityType<?>, Integer> limitMap) {
++ if (section == null) {
++ return;
++ }
++ for (final String key : section.getKeys(false)) {
++ final int value = section.getInt(key);
++ final net.minecraft.world.entity.EntityType<?> type = net.minecraft.world.entity.EntityType.byString(key).orElse(null);
++ if (type == null) {
++ logError("Invalid entity-per-chunk-save-limit config, '" + key+ "' is not a valid entity type. Correct this in paper.yml.");
++ continue;
++ }
++ if (value >= 0) {
++ limitMap.put(type, value);
++ } else {
++ limitMap.remove(type);
++ }
++ }
++ }
++
+ public short keepLoadedRange;
+ private void keepLoadedRange() {
+ keepLoadedRange = (short) (getInt("keep-spawn-loaded-range", Math.min(spigotConfig.viewDistance, 10)) * 16);
+diff --git a/src/main/java/net/minecraft/world/entity/EntityType.java b/src/main/java/net/minecraft/world/entity/EntityType.java
+index d17bde781ff574799054d9696e4d4480fe04a52c..419a7e9614af2328ed401fc954196056243a984c 100644
+--- a/src/main/java/net/minecraft/world/entity/EntityType.java
++++ b/src/main/java/net/minecraft/world/entity/EntityType.java
+@@ -560,9 +560,20 @@ public class EntityType<T extends Entity> implements EntityTypeTest<Entity, T> {
+ final Spliterator<? extends net.minecraft.nbt.Tag> spliterator = entityNbtList.spliterator();
+
+ return StreamSupport.stream(new Spliterator<Entity>() {
++ final java.util.Map<EntityType<?>, Integer> loadedEntityCounts = new java.util.HashMap<>(); // Paper
+ public boolean tryAdvance(Consumer<? super Entity> consumer) {
+ return spliterator.tryAdvance((nbtbase) -> {
+ EntityType.loadEntityRecursive((CompoundTag) nbtbase, world, (entity) -> {
++ // Paper start
++ final EntityType<?> entityType = entity.getType();
++ final int saveLimit = world.paperConfig.entityPerChunkSaveLimits.getOrDefault(entityType, -1);
++ if (saveLimit > -1) {
++ if (this.loadedEntityCounts.getOrDefault(entityType, 0) >= saveLimit) {
++ return null;
++ }
++ this.loadedEntityCounts.merge(entityType, 1, Integer::sum);
++ }
++ // Paper end
+ consumer.accept(entity);
+ return entity;
+ });
+diff --git a/src/main/java/net/minecraft/world/level/chunk/storage/EntityStorage.java b/src/main/java/net/minecraft/world/level/chunk/storage/EntityStorage.java
+index ac1e1a56698bda3a02d76c843562d4f66ad9ffa3..bc46fdff45b174d9c266d1b6b546061a39b4997d 100644
+--- a/src/main/java/net/minecraft/world/level/chunk/storage/EntityStorage.java
++++ b/src/main/java/net/minecraft/world/level/chunk/storage/EntityStorage.java
+@@ -90,7 +90,18 @@ public class EntityStorage implements EntityPersistentStorage<Entity> {
+
+ } else {
+ ListTag listTag = new ListTag();
++ final java.util.Map<net.minecraft.world.entity.EntityType<?>, Integer> savedEntityCounts = new java.util.HashMap<>(); // Paper
+ dataList.getEntities().forEach((entity) -> {
++ // Paper start
++ final EntityType<?> entityType = entity.getType();
++ final int saveLimit = this.level.paperConfig.entityPerChunkSaveLimits.getOrDefault(entityType, -1);
++ if (saveLimit > -1) {
++ if (savedEntityCounts.getOrDefault(entityType, 0) >= saveLimit) {
++ return;
++ }
++ savedEntityCounts.merge(entityType, 1, Integer::sum);
++ }
++ // Paper end
+ CompoundTag compoundTag = new CompoundTag();
+ if (entity.save(compoundTag)) {
+ listTag.add(compoundTag);