Paper/patches/server/0529-Add-basic-Datapack-API.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

126 lines
4.7 KiB
Diff

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Connor Linfoot <connorlinfoot@me.com>
Date: Sun, 16 May 2021 15:07:34 +0100
Subject: [PATCH] Add basic Datapack API
diff --git a/src/main/java/io/papermc/paper/datapack/PaperDatapack.java b/src/main/java/io/papermc/paper/datapack/PaperDatapack.java
new file mode 100644
index 0000000000000000000000000000000000000000..9b7dd8a0fba4547f5268b3f99e21ddbe6b5bf566
--- /dev/null
+++ b/src/main/java/io/papermc/paper/datapack/PaperDatapack.java
@@ -0,0 +1,50 @@
+package io.papermc.paper.datapack;
+
+import io.papermc.paper.event.server.ServerResourcesReloadedEvent;
+import net.minecraft.server.MinecraftServer;
+import net.minecraft.server.packs.repository.Pack;
+import java.util.List;
+import java.util.stream.Collectors;
+
+public class PaperDatapack implements Datapack {
+ private final String name;
+ private final Compatibility compatibility;
+ private final boolean enabled;
+
+ PaperDatapack(Pack loader, boolean enabled) {
+ this.name = loader.getId();
+ this.compatibility = Compatibility.valueOf(loader.getCompatibility().name());
+ this.enabled = enabled;
+ }
+
+ @Override
+ public String getName() {
+ return name;
+ }
+
+ @Override
+ public Compatibility getCompatibility() {
+ return compatibility;
+ }
+
+ @Override
+ public boolean isEnabled() {
+ return enabled;
+ }
+
+ @Override
+ public void setEnabled(boolean enabled) {
+ if (enabled == this.enabled) {
+ return;
+ }
+
+ MinecraftServer server = MinecraftServer.getServer();
+ List<String> enabledKeys = server.getPackRepository().getSelectedPacks().stream().map(Pack::getId).collect(Collectors.toList());
+ if (enabled) {
+ enabledKeys.add(this.name);
+ } else {
+ enabledKeys.remove(this.name);
+ }
+ server.reloadResources(enabledKeys, ServerResourcesReloadedEvent.Cause.PLUGIN);
+ }
+}
diff --git a/src/main/java/io/papermc/paper/datapack/PaperDatapackManager.java b/src/main/java/io/papermc/paper/datapack/PaperDatapackManager.java
new file mode 100644
index 0000000000000000000000000000000000000000..cf4374493c11057451a62a655514415cf6b298e0
--- /dev/null
+++ b/src/main/java/io/papermc/paper/datapack/PaperDatapackManager.java
@@ -0,0 +1,25 @@
+package io.papermc.paper.datapack;
+
+import java.util.Collection;
+import java.util.stream.Collectors;
+import net.minecraft.server.packs.repository.Pack;
+import net.minecraft.server.packs.repository.PackRepository;
+
+public class PaperDatapackManager implements DatapackManager {
+ private final PackRepository repository;
+
+ public PaperDatapackManager(PackRepository repository) {
+ this.repository = repository;
+ }
+
+ @Override
+ public Collection<Datapack> getPacks() {
+ Collection<Pack> enabledPacks = repository.getSelectedPacks();
+ return repository.getAvailablePacks().stream().map(loader -> new PaperDatapack(loader, enabledPacks.contains(loader))).collect(Collectors.toList());
+ }
+
+ @Override
+ public Collection<Datapack> getEnabledPacks() {
+ return repository.getSelectedPacks().stream().map(loader -> new PaperDatapack(loader, true)).collect(Collectors.toList());
+ }
+}
diff --git a/src/main/java/org/bukkit/craftbukkit/CraftServer.java b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
index 99ff052c1935b9eba5fc519ae18c335893595337..1b320ab17379da9b82320e63babb0f395d4b85a8 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftServer.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
@@ -305,6 +305,7 @@ public final class CraftServer implements Server {
private final List<CraftPlayer> playerView;
public int reloadCount;
public Set<String> activeCompatibilities = Collections.emptySet();
+ private final io.papermc.paper.datapack.PaperDatapackManager datapackManager; // Paper
public static Exception excessiveVelEx; // Paper - Velocity warnings
static {
@@ -389,6 +390,7 @@ public final class CraftServer implements Server {
if (this.configuration.getBoolean("settings.use-map-color-cache")) {
MapPalette.setMapColorCache(new CraftMapColorCache(this.logger));
}
+ datapackManager = new io.papermc.paper.datapack.PaperDatapackManager(console.getPackRepository()); // Paper
}
public boolean getCommandBlockOverride(String command) {
@@ -3006,5 +3008,11 @@ public final class CraftServer implements Server {
public com.destroystokyo.paper.entity.ai.MobGoals getMobGoals() {
return mobGoals;
}
+
+ @Override
+ public io.papermc.paper.datapack.PaperDatapackManager getDatapackManager() {
+ return datapackManager;
+ }
+
// Paper end
}