PaperMC/patches/server/0856-Fire-CauldronLevelChange-on-initial-fill.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: Jake Potrebic <jake.m.potrebic@gmail.com>
Date: Tue, 29 Mar 2022 13:46:23 -0700
Subject: [PATCH] Fire CauldronLevelChange on initial fill
Also don't fire level events or game events if stalactite
drip is cancelled
diff --git a/src/main/java/net/minecraft/world/level/block/CauldronBlock.java b/src/main/java/net/minecraft/world/level/block/CauldronBlock.java
index 53089c3a36bf2c0ec1bc9b436884deff0c30f028..46846ac9981e447fc6886aecf82563378a4f5548 100644
--- a/src/main/java/net/minecraft/world/level/block/CauldronBlock.java
+++ b/src/main/java/net/minecraft/world/level/block/CauldronBlock.java
@@ -36,10 +36,18 @@ public class CauldronBlock extends AbstractCauldronBlock {
public void handlePrecipitation(BlockState state, Level world, BlockPos pos, Biome.Precipitation precipitation) {
if (CauldronBlock.shouldHandlePrecipitation(world, precipitation)) {
if (precipitation == Biome.Precipitation.RAIN) {
- world.setBlockAndUpdate(pos, Blocks.WATER_CAULDRON.defaultBlockState());
+ // Paper start - call event for initial fill
+ if (!LayeredCauldronBlock.changeLevel(state, world, pos, Blocks.WATER_CAULDRON.defaultBlockState(), null, CauldronLevelChangeEvent.ChangeReason.NATURAL_FILL)) {
+ return;
+ }
+ // Paper end
world.gameEvent((Entity) null, GameEvent.BLOCK_CHANGE, pos);
} else if (precipitation == Biome.Precipitation.SNOW) {
- world.setBlockAndUpdate(pos, Blocks.POWDER_SNOW_CAULDRON.defaultBlockState());
+ // Paper start - call event for initial fill
+ if (!LayeredCauldronBlock.changeLevel(state, world, pos, Blocks.POWDER_SNOW_CAULDRON.defaultBlockState(), null, CauldronLevelChangeEvent.ChangeReason.NATURAL_FILL)) {
+ return;
+ }
+ // Paper end
world.gameEvent((Entity) null, GameEvent.BLOCK_CHANGE, pos);
}
@@ -57,11 +65,19 @@ public class CauldronBlock extends AbstractCauldronBlock {
if (fluid == Fluids.WATER) {
iblockdata1 = Blocks.WATER_CAULDRON.defaultBlockState();
- LayeredCauldronBlock.changeLevel(state, world, pos, iblockdata1, null, CauldronLevelChangeEvent.ChangeReason.NATURAL_FILL); // CraftBukkit
+ // Paper start - don't send level event or game event if cancelled
+ if (!LayeredCauldronBlock.changeLevel(state, world, pos, iblockdata1, null, CauldronLevelChangeEvent.ChangeReason.NATURAL_FILL)) { // CraftBukkit
+ return;
+ }
+ // Paper end
world.levelEvent(1047, pos, 0);
} else if (fluid == Fluids.LAVA) {
iblockdata1 = Blocks.LAVA_CAULDRON.defaultBlockState();
- LayeredCauldronBlock.changeLevel(state, world, pos, iblockdata1, null, CauldronLevelChangeEvent.ChangeReason.NATURAL_FILL); // CraftBukkit
+ // Paper start - don't send level event or game event if cancelled
+ if (!LayeredCauldronBlock.changeLevel(state, world, pos, iblockdata1, null, CauldronLevelChangeEvent.ChangeReason.NATURAL_FILL)) { // CraftBukkit
+ return;
+ }
+ // Paper end
world.levelEvent(1046, pos, 0);
}
diff --git a/src/main/java/net/minecraft/world/level/block/LayeredCauldronBlock.java b/src/main/java/net/minecraft/world/level/block/LayeredCauldronBlock.java
index 24d2da792bc498adf4251555a538df4cafe2e827..1a7cb12fd3f183c00079d679452a01b8df8d2bbb 100644
--- a/src/main/java/net/minecraft/world/level/block/LayeredCauldronBlock.java
+++ b/src/main/java/net/minecraft/world/level/block/LayeredCauldronBlock.java
@@ -91,7 +91,7 @@ public class LayeredCauldronBlock extends AbstractCauldronBlock {
}
// CraftBukkit start
- public static boolean changeLevel(BlockState iblockdata, Level world, BlockPos blockposition, BlockState newBlock, Entity entity, CauldronLevelChangeEvent.ChangeReason reason) {
+ public static boolean changeLevel(BlockState iblockdata, Level world, BlockPos blockposition, BlockState newBlock, @javax.annotation.Nullable Entity entity, CauldronLevelChangeEvent.ChangeReason reason) { // Paper - entity is nullable
CraftBlockState newState = CraftBlockStates.getBlockState(world, blockposition);
newState.setData(newBlock);