Paper/patches/server/0146-Entity-fromMobSpawner.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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Diff

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: BillyGalbreath <Blake.Galbreath@GMail.com>
Date: Sun, 18 Jun 2017 18:17:05 -0500
Subject: [PATCH] Entity#fromMobSpawner()
diff --git a/src/main/java/net/minecraft/world/entity/Entity.java b/src/main/java/net/minecraft/world/entity/Entity.java
index 6e1b53317c4107f907e551a9baeaf64909f6de87..65a22c154807c416a63fbf68dad72175b51a52d4 100644
--- a/src/main/java/net/minecraft/world/entity/Entity.java
+++ b/src/main/java/net/minecraft/world/entity/Entity.java
@@ -380,6 +380,7 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource {
// Spigot end
// Paper start
protected int numCollisions = 0; // Paper
+ public boolean spawnedViaMobSpawner; // Paper - Yes this name is similar to above, upstream took the better one
@javax.annotation.Nullable
private org.bukkit.util.Vector origin;
@javax.annotation.Nullable
@@ -2020,6 +2021,10 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource {
}
nbt.put("Paper.Origin", this.newDoubleList(origin.getX(), origin.getY(), origin.getZ()));
}
+ // Save entity's from mob spawner status
+ if (spawnedViaMobSpawner) {
+ nbt.putBoolean("Paper.FromMobSpawner", true);
+ }
// Paper end
return nbt;
} catch (Throwable throwable) {
@@ -2159,6 +2164,8 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource {
this.originWorld = originWorld;
origin = new org.bukkit.util.Vector(originTag.getDouble(0), originTag.getDouble(1), originTag.getDouble(2));
}
+
+ spawnedViaMobSpawner = nbt.getBoolean("Paper.FromMobSpawner"); // Restore entity's from mob spawner status
// Paper end
} catch (Throwable throwable) {
diff --git a/src/main/java/net/minecraft/world/level/BaseSpawner.java b/src/main/java/net/minecraft/world/level/BaseSpawner.java
index e5b56a85d76d1417dda2d14b1b03850bbb070f4c..5304b0455b070006922e1b5471e9c0ababc58aa2 100644
--- a/src/main/java/net/minecraft/world/level/BaseSpawner.java
+++ b/src/main/java/net/minecraft/world/level/BaseSpawner.java
@@ -159,6 +159,7 @@ public abstract class BaseSpawner {
}
// Spigot End
}
+ entity.spawnedViaMobSpawner = true; // Paper
// Spigot Start
if (org.bukkit.craftbukkit.event.CraftEventFactory.callSpawnerSpawnEvent(entity, pos).isCancelled()) {
Entity vehicle = entity.getVehicle();
diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java
index b9599f4f431098d63be98b5175890371103f8813..d3a8c68f5186f69432fb8af8b34b174b04368fc1 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java
@@ -1260,5 +1260,10 @@ public abstract class CraftEntity implements org.bukkit.entity.Entity {
//noinspection ConstantConditions
return originVector.toLocation(world);
}
+
+ @Override
+ public boolean fromMobSpawner() {
+ return getHandle().spawnedViaMobSpawner;
+ }
// Paper end
}