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Paper/patches/server/0093-remove-null-possibility-for-getServer-singleton.patch
Bjarne Koll c5a10665b8
Remove wall-time / unused skip tick protection (#11412)
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.
2024-09-19 16:36:07 +02:00

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2.2 KiB
Diff

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Thu, 28 Apr 2016 00:57:27 -0400
Subject: [PATCH] remove null possibility for getServer singleton
to stop IDE complaining about potential NPE
diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
index 30fbbe053ee325f4b9f7722416fb5fb92121e2ad..f16ade2019e58a9374a550f58113313c118c2f2b 100644
--- a/src/main/java/net/minecraft/server/MinecraftServer.java
+++ b/src/main/java/net/minecraft/server/MinecraftServer.java
@@ -197,6 +197,7 @@ import co.aikar.timings.MinecraftTimings; // Paper
public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTask> implements ServerInfo, ChunkIOErrorReporter, CommandSource, AutoCloseable {
+ private static MinecraftServer SERVER; // Paper
public static final Logger LOGGER = LogUtils.getLogger();
public static final net.kyori.adventure.text.logger.slf4j.ComponentLogger COMPONENT_LOGGER = net.kyori.adventure.text.logger.slf4j.ComponentLogger.logger(LOGGER.getName()); // Paper
public static final String VANILLA_BRAND = "vanilla";
@@ -330,6 +331,7 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
public MinecraftServer(OptionSet options, WorldLoader.DataLoadContext worldLoader, Thread thread, LevelStorageSource.LevelStorageAccess convertable_conversionsession, PackRepository resourcepackrepository, WorldStem worldstem, Proxy proxy, DataFixer datafixer, Services services, ChunkProgressListenerFactory worldloadlistenerfactory) {
super("Server");
+ SERVER = this; // Paper - better singleton
this.metricsRecorder = InactiveMetricsRecorder.INSTANCE;
this.profiler = this.metricsRecorder.getProfiler();
this.onMetricsRecordingStopped = (methodprofilerresults) -> {
@@ -2546,9 +2548,8 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
return false;
}
- @Deprecated
public static MinecraftServer getServer() {
- return (Bukkit.getServer() instanceof CraftServer) ? ((CraftServer) Bukkit.getServer()).getServer() : null;
+ return SERVER; // Paper
}
@Deprecated