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c5a10665b8
Spigot still maintains some partial implementation of "tick skipping", a practice in which the MinecraftServer.currentTick field is updated not by an increment of one per actual tick, but instead set to System.currentTimeMillis() / 50. This behaviour means that the tracked tick may "skip" a tick value in case a previous tick took more than the expected 50ms. To compensate for this in important paths, spigot/craftbukkit implements "wall-time". Instead of incrementing/decrementing ticks on block entities/entities by one for each call to their tick() method, they instead increment/decrement important values, like an ItemEntity's age or pickupDelay, by the difference of `currentTick - lastTick`, where `lastTick` is the value of `currentTick` during the last tick() call. These "fixes" however do not play nicely with minecraft's simulation distance as entities/block entities implementing the above behaviour would "catch up" their values when moving from a non-ticking chunk to a ticking one as their `lastTick` value remains stuck on the last tick in a ticking chunk and hence lead to a large "catch up" once ticked again. Paper completely removes the "tick skipping" behaviour (See patch "Further-improve-server-tick-loop"), making the above precautions completely unnecessary, which also rids paper of the previous described incompatibility with non-ticking chunks.
105 lines
6.4 KiB
Diff
105 lines
6.4 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Aikar <aikar@aikar.co>
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Date: Sun, 19 Apr 2020 00:05:46 -0400
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Subject: [PATCH] Fire PlayerJoinEvent when Player is actually ready
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For years, plugin developers have had to delay many things they do
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inside of the PlayerJoinEvent by 1 tick to make it actually work.
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This all boiled down to 1 reason why: The event fired before the
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player was fully ready and joined to the world!
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Additionally, if that player logged out on a vehicle, the event
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fired before the vehicle was even loaded, so that plugins had no
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access to the vehicle during this event either.
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This change finally fixes this issue, fully preparing the player
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into the world as a fully ready entity, vehicle included.
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There should be no plugins that break because of this change, but might
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improve consistency with other plugins instead.
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For example, if 2 plugins listens to this event, and the first one
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teleported the player in the event, then the 2nd plugin actually
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would be getting a valid player!
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This was very non deterministic. This change will ensure every plugin
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receives a deterministic result, and should no longer require 1 tick
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delays anymore.
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== AT ==
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public net.minecraft.server.level.ChunkMap addEntity(Lnet/minecraft/world/entity/Entity;)V
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diff --git a/src/main/java/net/minecraft/server/level/ChunkMap.java b/src/main/java/net/minecraft/server/level/ChunkMap.java
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index 8206ec366b429858d9582e437781191e5aa0fa02..d91279f3bd009e1542e73354aadd6a16c80965e2 100644
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--- a/src/main/java/net/minecraft/server/level/ChunkMap.java
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+++ b/src/main/java/net/minecraft/server/level/ChunkMap.java
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@@ -1248,6 +1248,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
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return;
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}
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// Paper end - ignore and warn about illegal addEntity calls instead of crashing server
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+ if (entity instanceof ServerPlayer && ((ServerPlayer) entity).supressTrackerForLogin) return; // Paper - Fire PlayerJoinEvent when Player is actually ready; Delay adding to tracker until after list packets
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if (!(entity instanceof EnderDragonPart)) {
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EntityType<?> entitytypes = entity.getType();
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int i = entitytypes.clientTrackingRange() * 16;
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diff --git a/src/main/java/net/minecraft/server/level/ServerPlayer.java b/src/main/java/net/minecraft/server/level/ServerPlayer.java
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index 8938f90c53de8aef71aa70522a66a69edb467e73..e6e7dc17d1196a8211a565355f34b5dcfd478852 100644
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--- a/src/main/java/net/minecraft/server/level/ServerPlayer.java
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+++ b/src/main/java/net/minecraft/server/level/ServerPlayer.java
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@@ -289,6 +289,7 @@ public class ServerPlayer extends net.minecraft.world.entity.player.Player {
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public double maxHealthCache;
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public boolean joining = true;
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public boolean sentListPacket = false;
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+ public boolean supressTrackerForLogin = false; // Paper - Fire PlayerJoinEvent when Player is actually ready
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public String kickLeaveMessage = null; // SPIGOT-3034: Forward leave message to PlayerQuitEvent
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// CraftBukkit end
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public boolean isRealPlayer; // Paper
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diff --git a/src/main/java/net/minecraft/server/players/PlayerList.java b/src/main/java/net/minecraft/server/players/PlayerList.java
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index 2cbdcdf0349e7efa797802d0d339d158153690af..5390ce62ec8afd24d2e028ea04d2ef3029a125f9 100644
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--- a/src/main/java/net/minecraft/server/players/PlayerList.java
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+++ b/src/main/java/net/minecraft/server/players/PlayerList.java
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@@ -297,6 +297,12 @@ public abstract class PlayerList {
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this.playersByUUID.put(player.getUUID(), player);
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// this.broadcastAll(ClientboundPlayerInfoUpdatePacket.createPlayerInitializing(List.of(entityplayer))); // CraftBukkit - replaced with loop below
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+ // 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
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+ player.supressTrackerForLogin = true;
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+ worldserver1.addNewPlayer(player);
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+ this.server.getCustomBossEvents().onPlayerConnect(player); // see commented out section below worldserver.addPlayerJoin(entityplayer);
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+ this.mountSavedVehicle(player, worldserver1, optional);
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+ // Paper end - Fire PlayerJoinEvent when Player is actually ready
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// CraftBukkit start
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CraftPlayer bukkitPlayer = player.getBukkitEntity();
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@@ -335,6 +341,8 @@ public abstract class PlayerList {
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player.connection.send(ClientboundPlayerInfoUpdatePacket.createPlayerInitializing(List.of(entityplayer1)));
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}
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player.sentListPacket = true;
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+ player.supressTrackerForLogin = false; // Paper - Fire PlayerJoinEvent when Player is actually ready
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+ ((ServerLevel)player.level()).getChunkSource().chunkMap.addEntity(player); // Paper - Fire PlayerJoinEvent when Player is actually ready; track entity now
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// CraftBukkit end
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player.refreshEntityData(player); // CraftBukkit - BungeeCord#2321, send complete data to self on spawn
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@@ -350,6 +358,11 @@ public abstract class PlayerList {
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worldserver1 = player.serverLevel(); // CraftBukkit - Update in case join event changed it
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// CraftBukkit end
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this.sendActivePlayerEffects(player);
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+ // Paper start - Fire PlayerJoinEvent when Player is actually ready; move vehicle into method so it can be called above - short circuit around that code
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+ this.onPlayerJoinFinish(player, worldserver1, s1);
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+ }
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+ private void mountSavedVehicle(ServerPlayer player, ServerLevel worldserver1, Optional<CompoundTag> optional) {
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+ // Paper end - Fire PlayerJoinEvent when Player is actually ready
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if (optional.isPresent() && ((CompoundTag) optional.get()).contains("RootVehicle", 10)) {
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CompoundTag nbttagcompound = ((CompoundTag) optional.get()).getCompound("RootVehicle");
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ServerLevel finalWorldServer = worldserver1; // CraftBukkit - decompile error
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@@ -396,6 +409,10 @@ public abstract class PlayerList {
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}
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}
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+ // Paper start - Fire PlayerJoinEvent when Player is actually ready
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+ }
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+ public void onPlayerJoinFinish(ServerPlayer player, ServerLevel worldserver1, String s1) {
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+ // Paper end - Fire PlayerJoinEvent when Player is actually ready
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player.initInventoryMenu();
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// CraftBukkit - Moved from above, added world
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// Paper start - Configurable player collision; Add to collideRule team if needed
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