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.

1 files changed, 93 insertions, 0 deletions

diff --git a/patches/server/0064-Complete-resource-pack-API.patch b/patches/server/0064-Complete-resource-pack-API.patch
new file mode 100644
index 0000000000..cac7d1f1fb
--- /dev/null
+++ b/patches/server/0064-Complete-resource-pack-API.patch
@@ -0,0 +1,93 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Jedediah Smith <[email protected]>
+Date: Sat, 4 Apr 2015 23:17:52 -0400
+Subject: [PATCH] Complete resource pack API
+
+
+diff --git a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
+index e21a6961bab606036440f2a6bd90998b4129ae10..9f0a5b950a022aa2a3d3d60837fdb9023f041a9b 100644
+--- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
++++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
+@@ -1768,8 +1768,11 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Tic
+             ServerGamePacketListenerImpl.LOGGER.info("Disconnecting {} due to resource pack rejection", this.player.getName());
+             this.disconnect(Component.translatable("multiplayer.requiredTexturePrompt.disconnect"));
+         }
+-        this.cserver.getPluginManager().callEvent(new PlayerResourcePackStatusEvent(this.getCraftPlayer(), PlayerResourcePackStatusEvent.Status.values()[packet.action.ordinal()])); // CraftBukkit
+-
++        // Paper start
++        PlayerResourcePackStatusEvent.Status packStatus = PlayerResourcePackStatusEvent.Status.values()[packet.action.ordinal()];
++        player.getBukkitEntity().setResourcePackStatus(packStatus);
++        this.cserver.getPluginManager().callEvent(new PlayerResourcePackStatusEvent(this.getCraftPlayer(), packStatus)); // CraftBukkit
++        // Paper end
+     }
+ 
+     @Override
+diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
+index 342cd3c6ffdcf46f0329e072fae446c5e9665e33..307c76b2d06b748304d28d6634e86bb91f3ded67 100644
+--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
++++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
+@@ -150,6 +150,7 @@ import org.bukkit.plugin.Plugin;
+ import org.bukkit.plugin.messaging.StandardMessenger;
+ import org.bukkit.profile.PlayerProfile;
+ import org.bukkit.scoreboard.Scoreboard;
++import org.jetbrains.annotations.NotNull;
+ 
+ import net.md_5.bungee.api.chat.BaseComponent; // Spigot
+ 
+@@ -168,6 +169,10 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
+     private double healthScale = 20;
+     private CraftWorldBorder clientWorldBorder = null;
+     private BorderChangeListener clientWorldBorderListener = this.createWorldBorderListener();
++    // Paper start
++    private org.bukkit.event.player.PlayerResourcePackStatusEvent.Status resourcePackStatus;
++    private String resourcePackHash;
++    // Paper end
+ 
+     public CraftPlayer(CraftServer server, ServerPlayer entity) {
+         super(server, entity);
+@@ -2206,6 +2211,45 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
+     public boolean getAffectsSpawning() {
+         return this.getHandle().affectsSpawning;
+     }
++
++    @Override
++    public void setResourcePack(@NotNull String url, @NotNull String hash) {
++        this.setResourcePack(url, hash, false, null);
++    }
++
++    @Override
++    public void setResourcePack(@NotNull String url, @NotNull String hash, boolean required) {
++        this.setResourcePack(url, hash, required, null);
++    }
++
++    @Override
++    public void setResourcePack(@NotNull String url, @NotNull String hash, boolean required, net.kyori.adventure.text.Component resourcePackPrompt) {
++        Validate.notNull(url, "Resource pack URL cannot be null");
++        Validate.notNull(hash, "Hash cannot be null");
++        net.minecraft.network.chat.Component promptComponent = resourcePackPrompt != null ?
++                            io.papermc.paper.adventure.PaperAdventure.asVanilla(resourcePackPrompt) :
++                           null;
++        this.getHandle().sendTexturePack(url, hash, required, promptComponent);
++    }
++
++    @Override
++    public org.bukkit.event.player.PlayerResourcePackStatusEvent.Status getResourcePackStatus() {
++        return this.resourcePackStatus;
++    }
++
++    @Override
++    public String getResourcePackHash() {
++        return this.resourcePackHash;
++    }
++
++    @Override
++    public boolean hasResourcePack() {
++        return this.resourcePackStatus == org.bukkit.event.player.PlayerResourcePackStatusEvent.Status.SUCCESSFULLY_LOADED;
++    }
++
++    public void setResourcePackStatus(org.bukkit.event.player.PlayerResourcePackStatusEvent.Status status) {
++        this.resourcePackStatus = status;
++    }
+     // Paper end
+ 
+     @Override