Paper/patches/server/0465-Add-setMaxPlayers-API.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: Mariell Hoversholm <proximyst@proximyst.com>
Date: Sat, 22 Aug 2020 23:59:30 +0200
Subject: [PATCH] Add #setMaxPlayers API
diff --git a/src/main/java/net/minecraft/server/players/PlayerList.java b/src/main/java/net/minecraft/server/players/PlayerList.java
index db03f510195981e9f860ce2fdc59d0a70283dc14..4d05d23f5b6967da29d5c9c91931cd79745f5dcb 100644
--- a/src/main/java/net/minecraft/server/players/PlayerList.java
+++ b/src/main/java/net/minecraft/server/players/PlayerList.java
@@ -147,7 +147,7 @@ public abstract class PlayerList {
public final PlayerDataStorage playerIo;
private boolean doWhiteList;
private final RegistryAccess.Frozen registryHolder;
- protected final int maxPlayers;
+ protected int maxPlayers; public final void setMaxPlayers(int maxPlayers) { this.maxPlayers = maxPlayers; } // Paper - remove final and add setter
private int viewDistance;
private int simulationDistance;
private boolean allowCheatsForAllPlayers;
diff --git a/src/main/java/org/bukkit/craftbukkit/CraftServer.java b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
index 007b85cfda82d245ae336efc26aa38ad2f6d2c28..e0050956b90ce35082017b3f1f697e455ecb9d34 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftServer.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
@@ -674,6 +674,13 @@ public final class CraftServer implements Server {
return this.playerList.getMaxPlayers();
}
+ // Paper start
+ @Override
+ public void setMaxPlayers(int maxPlayers) {
+ this.playerList.setMaxPlayers(maxPlayers);
+ }
+ // Paper end
+
// NOTE: These are dependent on the corresponding call in MinecraftServer
// so if that changes this will need to as well
@Override