Paper/patches/server/0594-Only-set-despawnTimer-for-Wandering-Traders-spawned-.patch
Spottedleaf 01a13871de
Rewrite chunk system (#8177)
Patch documentation to come

Issues with the old system that are fixed now:
- World generation does not scale with cpu cores effectively.
- Relies on the main thread for scheduling and maintaining chunk state, dropping chunk load/generate rates at lower tps.
- Unreliable prioritisation of chunk gen/load calls that block the main thread.
- Shutdown logic is utterly unreliable, as it has to wait for all chunks to unload - is it guaranteed that the chunk system is in a state on shutdown that it can reliably do this? Watchdog shutdown also typically failed due to thread checks, which is now resolved.
- Saving of data is not unified (i.e can save chunk data without saving entity data, poses problems for desync if shutdown is really abnormal.
- Entities are not loaded with chunks. This caused quite a bit of headache for Chunk#getEntities API, but now the new chunk system loads entities with chunks so that they are ready whenever the chunk loads in. Effectively brings the behavior back to 1.16 era, but still storing entities in their own separate regionfiles.

The above list is not complete. The patch documentation will complete it.

New chunk system hard relies on starlight and dataconverter, and most importantly the new concurrent utilities in ConcurrentUtil.

Some of the old async chunk i/o interface (i.e the old file io thread reroutes _some_ calls to the new file io thread) is kept for plugin compat reasons. It will be removed in the next major version of minecraft.

The old legacy chunk system patches have been moved to the removed folder in case we need them again.
2022-09-26 01:02:51 -07:00

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jason Penilla <11360596+jpenilla@users.noreply.github.com>
Date: Fri, 19 Mar 2021 16:07:21 -0700
Subject: [PATCH] Only set despawnTimer for Wandering Traders spawned by
MobSpawnerTrader
diff --git a/src/main/java/net/minecraft/world/entity/EntityType.java b/src/main/java/net/minecraft/world/entity/EntityType.java
index 4b8024f8f62caaa417de6798522c2beb98e00fc4..e7bfd61be4974dbe6abc2ebb870664ff1fce19cb 100644
--- a/src/main/java/net/minecraft/world/entity/EntityType.java
+++ b/src/main/java/net/minecraft/world/entity/EntityType.java
@@ -347,6 +347,12 @@ public class EntityType<T extends Entity> implements EntityTypeTest<Entity, T> {
@Nullable
public T spawn(ServerLevel worldserver, @Nullable CompoundTag nbttagcompound, @Nullable Component ichatbasecomponent, @Nullable Player entityhuman, BlockPos blockposition, MobSpawnType enummobspawn, boolean flag, boolean flag1, org.bukkit.event.entity.CreatureSpawnEvent.SpawnReason spawnReason) {
+ // Paper start - add consumer to modify entity before spawn
+ return this.spawn(worldserver, nbttagcompound, ichatbasecomponent, entityhuman, blockposition, enummobspawn, flag, flag1, spawnReason, null);
+ }
+ @Nullable
+ public T spawn(ServerLevel worldserver, @Nullable CompoundTag nbttagcompound, @Nullable Component ichatbasecomponent, @Nullable Player entityhuman, BlockPos blockposition, MobSpawnType enummobspawn, boolean flag, boolean flag1, org.bukkit.event.entity.CreatureSpawnEvent.SpawnReason spawnReason, @Nullable java.util.function.Consumer<T> op) {
+ // Paper end
// Paper start - Call PreCreatureSpawnEvent
org.bukkit.entity.EntityType type = org.bukkit.entity.EntityType.fromName(EntityType.getKey(this).getPath());
if (type != null) {
@@ -362,6 +368,7 @@ public class EntityType<T extends Entity> implements EntityTypeTest<Entity, T> {
}
// Paper end
T t0 = this.create(worldserver, nbttagcompound, ichatbasecomponent, entityhuman, blockposition, enummobspawn, flag, flag1);
+ if (t0 != null && op != null) op.accept(t0); // Paper
if (t0 != null) {
worldserver.addFreshEntityWithPassengers(t0, spawnReason);
diff --git a/src/main/java/net/minecraft/world/entity/npc/WanderingTrader.java b/src/main/java/net/minecraft/world/entity/npc/WanderingTrader.java
index d7cb3d8b37f225ee4796246aa907da1092fa9a0d..abb2c5c4ac481c7529aa29322babb1929235e15a 100644
--- a/src/main/java/net/minecraft/world/entity/npc/WanderingTrader.java
+++ b/src/main/java/net/minecraft/world/entity/npc/WanderingTrader.java
@@ -59,7 +59,7 @@ public class WanderingTrader extends net.minecraft.world.entity.npc.AbstractVill
public WanderingTrader(EntityType<? extends WanderingTrader> type, Level world) {
super(type, world);
- this.setDespawnDelay(48000); // CraftBukkit - set default from MobSpawnerTrader
+ //this.setDespawnDelay(48000); // CraftBukkit - set default from MobSpawnerTrader // Paper - move back to MobSpawnerTrader - Vanilla behavior is that only traders spawned by it have this value set.
}
@Override
diff --git a/src/main/java/net/minecraft/world/entity/npc/WanderingTraderSpawner.java b/src/main/java/net/minecraft/world/entity/npc/WanderingTraderSpawner.java
index fcde09e155727fe0b8b6acc79700fe4122fd22f0..daa7c4bd8a3f6c28f02b7117b061f0def29e3743 100644
--- a/src/main/java/net/minecraft/world/entity/npc/WanderingTraderSpawner.java
+++ b/src/main/java/net/minecraft/world/entity/npc/WanderingTraderSpawner.java
@@ -123,7 +123,7 @@ public class WanderingTraderSpawner implements CustomSpawner {
return false;
}
- WanderingTrader entityvillagertrader = (WanderingTrader) EntityType.WANDERING_TRADER.spawn(world, (CompoundTag) null, (Component) null, (Player) null, blockposition2, MobSpawnType.EVENT, false, false, org.bukkit.event.entity.CreatureSpawnEvent.SpawnReason.NATURAL); // CraftBukkit
+ WanderingTrader entityvillagertrader = (WanderingTrader) EntityType.WANDERING_TRADER.spawn(world, (CompoundTag) null, (Component) null, (Player) null, blockposition2, MobSpawnType.EVENT, false, false, org.bukkit.event.entity.CreatureSpawnEvent.SpawnReason.NATURAL, trader -> trader.setDespawnDelay(48000)); // CraftBukkit // Paper - set despawnTimer before spawn events called
if (entityvillagertrader != null) {
for (int i = 0; i < 2; ++i) {