PaperMC/patches/server/0988-Handle-Oversized-block-entities-in-chunks.patch
Spottedleaf 8c5b837e05 Rework async chunk api implementation
Firstly, the old methods all routed to the CompletableFuture method.
However, the CF method could not guarantee that if the caller
was off-main that the future would be "completed" on-main. Since
the callback methods used the CF one, this meant that the callback
methods did not guarantee that the callbacks were to be called on
the main thread.

Now, all methods route to getChunkAtAsync(x, z, gen, urgent, cb)
so that the methods with the callback are guaranteed to invoke
the callback on the main thread. The CF behavior remains unchanged;
it may still appear to complete on main if invoked off-main.

Secondly, remove the scheduleOnMain invocation in the async
chunk completion. This unnecessarily delays the callback
by 1 tick.

Thirdly, add getChunksAtAsync(minX, minZ, maxX, maxZ, ...) which
will load chunks within an area. This method is provided as a helper
as keeping all chunks loaded within an area can be complicated to
implement for plugins (due to the lacking ticket API), and is
already implemented internally anyways.

Fourthly, remove the ticket addition that occured with getChunkAt
and getChunkAtAsync. The ticket addition may delay the unloading
of the chunk unnecessarily. It also fixes a very rare timing bug
where the future/callback would be completed after the chunk
unloads.
2024-11-18 23:00:59 -08:00

66 lines
3.6 KiB
Diff

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Wed, 6 May 2020 05:00:57 -0400
Subject: [PATCH] Handle Oversized block entities in chunks
Splits out Extra Packets if too many TE's are encountered to prevent
creating too large of a packet to sed.
Feature patch
Co-authored-by: Spottedleaf <Spottedleaf@users.noreply.github.com>
diff --git a/src/main/java/net/minecraft/network/protocol/game/ClientboundLevelChunkPacketData.java b/src/main/java/net/minecraft/network/protocol/game/ClientboundLevelChunkPacketData.java
index 1e75cd33c32f0e2923681da64b9b73b279933c1b..0a8d07bf68b0ceabd13c70196d357fce79dcc2c3 100644
--- a/src/main/java/net/minecraft/network/protocol/game/ClientboundLevelChunkPacketData.java
+++ b/src/main/java/net/minecraft/network/protocol/game/ClientboundLevelChunkPacketData.java
@@ -27,6 +27,14 @@ public class ClientboundLevelChunkPacketData {
private final CompoundTag heightmaps;
private final byte[] buffer;
private final List<ClientboundLevelChunkPacketData.BlockEntityInfo> blockEntitiesData;
+ // Paper start - Handle oversized block entities in chunks
+ private final java.util.List<net.minecraft.network.protocol.Packet<?>> extraPackets = new java.util.ArrayList<>();
+ private static final int TE_LIMIT = Integer.getInteger("Paper.excessiveTELimit", 750);
+
+ public List<net.minecraft.network.protocol.Packet<?>> getExtraPackets() {
+ return this.extraPackets;
+ }
+ // Paper end - Handle oversized block entities in chunks
// Paper start - Anti-Xray - Add chunk packet info
@Deprecated @io.papermc.paper.annotation.DoNotUse public ClientboundLevelChunkPacketData(LevelChunk chunk) { this(chunk, null); }
@@ -50,8 +58,18 @@ public class ClientboundLevelChunkPacketData {
extractChunkData(new FriendlyByteBuf(this.getWriteBuffer()), chunk, chunkPacketInfo);
// Paper end
this.blockEntitiesData = Lists.newArrayList();
+ int totalTileEntities = 0; // Paper - Handle oversized block entities in chunks
for (Entry<BlockPos, BlockEntity> entry2 : chunk.getBlockEntities().entrySet()) {
+ // Paper start - Handle oversized block entities in chunks
+ if (++totalTileEntities > TE_LIMIT) {
+ var packet = entry2.getValue().getUpdatePacket();
+ if (packet != null) {
+ this.extraPackets.add(packet);
+ continue;
+ }
+ }
+ // Paper end - Handle oversized block entities in chunks
this.blockEntitiesData.add(ClientboundLevelChunkPacketData.BlockEntityInfo.create(entry2.getValue()));
}
}
diff --git a/src/main/java/net/minecraft/network/protocol/game/ClientboundLevelChunkWithLightPacket.java b/src/main/java/net/minecraft/network/protocol/game/ClientboundLevelChunkWithLightPacket.java
index 8ead66c134688b11dca15f6509147e726f182e6a..cfcac0fdc130120cb1f8d97c6353d93db7ddf81b 100644
--- a/src/main/java/net/minecraft/network/protocol/game/ClientboundLevelChunkWithLightPacket.java
+++ b/src/main/java/net/minecraft/network/protocol/game/ClientboundLevelChunkWithLightPacket.java
@@ -83,4 +83,11 @@ public class ClientboundLevelChunkWithLightPacket implements Packet<ClientGamePa
public ClientboundLightUpdatePacketData getLightData() {
return this.lightData;
}
+
+ // Paper start - Handle oversized block entities in chunks
+ @Override
+ public java.util.List<Packet<?>> getExtraPackets() {
+ return this.chunkData.getExtraPackets();
+ }
+ // Paper end - Handle oversized block entities in chunks
}