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Leaf/leaf-server/minecraft-patches/features/0225-Paper-PR-Add-ticket-on-player-join-to-avoid-chunk-lo.patch
Creeam 2080a06b30 Fix configurable username validation (#551)
* Configurable vanilla username check

* Mark remove all checks as experimental

* More sanity check

* Sanitize name for Purpur AFK system

* [ci/skip] add comment

* Allow old players to join

* Cleanup patch

* [ci/skip] Update patch name
2025-11-23 04:38:45 -05:00

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jason Penilla <11360596+jpenilla@users.noreply.github.com>
Date: Fri, 13 Sep 2024 14:32:32 -0700
Subject: [PATCH] Paper PR: Add ticket on player join to avoid chunk
load-unload-load cycle
Original license: GPLv3
Original project: https://github.com/PaperMC/Paper
Paper pull request: https://github.com/PaperMC/Paper/pull/11398
Adding the entity will add and then immediately remove an entity load ticket, which would result in the chunk loading and then unloading before being loaded again once the player chunk loader reacts (delay can vary based on rate limit configs)
By adding a ticket with a short removal delay we attempt to keep the chunk loaded until the player chunk loader reacts, but this is not a guarantee due to the aforementioned rate limit configs. Plugins should still handle load/unload events as normal, however this will reduce redundant calls.
The delay is currently set to 2 seconds, however, we may want to adjust this before merging (for example the player chunk unload delay is 5 seconds)
fixes Paper#9581
diff --git a/ca/spottedleaf/moonrise/patches/chunk_system/player/RegionizedPlayerChunkLoader.java b/ca/spottedleaf/moonrise/patches/chunk_system/player/RegionizedPlayerChunkLoader.java
index 525f29f3ecd7eb12e3d7447898005d3a6d62c093..24f0d13922748eb8a96fd83f14204984becd2513 100644
--- a/ca/spottedleaf/moonrise/patches/chunk_system/player/RegionizedPlayerChunkLoader.java
+++ b/ca/spottedleaf/moonrise/patches/chunk_system/player/RegionizedPlayerChunkLoader.java
@@ -48,6 +48,7 @@ public final class RegionizedPlayerChunkLoader {
public static final TicketType PLAYER_TICKET = ChunkSystemTicketType.create("chunk_system:player_ticket", Long::compareTo);
public static final TicketType PLAYER_TICKET_DELAYED = ChunkSystemTicketType.create("chunk_system:player_ticket_delayed", Long::compareTo, 1L);
+ public static final TicketType PLAYER_JOIN = ChunkSystemTicketType.create("chunk_system:player_join", (a, b) -> 0, 5 * 20); // Paper PR - Add ticket on player join to avoid chunk load-unload-load cycle
public static final int GENERATED_TICKET_LEVEL = ChunkHolderManager.FULL_LOADED_TICKET_LEVEL;
public static final int LOADED_TICKET_LEVEL = ChunkTaskScheduler.getTicketLevel(ChunkStatus.EMPTY);
diff --git a/net/minecraft/server/players/PlayerList.java b/net/minecraft/server/players/PlayerList.java
index 09da54b32e88b1476dfe80d7924a9847da360d55..a04a3d63db443c25c23353df46591249496e0ded 100644
--- a/net/minecraft/server/players/PlayerList.java
+++ b/net/minecraft/server/players/PlayerList.java
@@ -441,6 +441,13 @@ public abstract class PlayerList {
// this.broadcastAll(ClientboundPlayerInfoUpdatePacket.createPlayerInitializing(List.of(player))); // CraftBukkit - replaced with loop below
// Paper start - Fire PlayerJoinEvent when Player is actually ready; correctly register player BEFORE PlayerJoinEvent, so the entity is valid and doesn't require tick delay hacks
player.supressTrackerForLogin = true;
+ // Paper PR start - Add ticket on player join to avoid chunk load-unload-load cycle
+ serverLevel.moonrise$getChunkTaskScheduler().chunkHolderManager.addTicketAtLevel(
+ ca.spottedleaf.moonrise.patches.chunk_system.player.RegionizedPlayerChunkLoader.PLAYER_JOIN,
+ player.chunkPosition(),
+ ca.spottedleaf.moonrise.patches.chunk_system.player.RegionizedPlayerChunkLoader.TICK_TICKET_LEVEL,
+ net.minecraft.util.Unit.INSTANCE);
+ // Paper PR end - Add ticket on player join to avoid chunk load-unload-load cycle
serverLevel.addNewPlayer(player);
this.server.getCustomBossEvents().onPlayerConnect(player); // see commented out section below serverLevel.addPlayerJoin(player);
// Paper end - Fire PlayerJoinEvent when Player is actually ready