Paper/patches/server/1039-Incremental-chunk-and-player-saving.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Shane Freeder <theboyetronic@gmail.com>
Date: Sun, 9 Jun 2019 03:53:22 +0100
Subject: [PATCH] Incremental chunk and player saving


diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
index 7e5adfddced650cf227b540f3b40573cdf5b0f7c..8160c35368fc2c52d6f4a42df27adb2ef6eb87f3 100644
--- a/src/main/java/net/minecraft/server/MinecraftServer.java
+++ b/src/main/java/net/minecraft/server/MinecraftServer.java
@@ -992,7 +992,7 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
 
         try {
             this.isSaving = true;
-            this.getPlayerList().saveAll();
+            this.getPlayerList().saveAll(); // Paper - Incremental chunk and player saving; diff on change
             flag3 = this.saveAllChunks(suppressLogs, flush, force);
         } finally {
             this.isSaving = false;
@@ -1596,16 +1596,28 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
         }
 
         --this.ticksUntilAutosave;
-        // CraftBukkit start
-        if (this.autosavePeriod > 0 && this.ticksUntilAutosave <= 0) {
-            this.ticksUntilAutosave = this.autosavePeriod;
-            // CraftBukkit end
-            MinecraftServer.LOGGER.debug("Autosave started");
-            this.profiler.push("save");
-            this.saveEverything(true, false, false);
-            this.profiler.pop();
-            MinecraftServer.LOGGER.debug("Autosave finished");
+        // Paper start - Incremental chunk and player saving
+        int playerSaveInterval = io.papermc.paper.configuration.GlobalConfiguration.get().playerAutoSave.rate;
+        if (playerSaveInterval < 0) {
+            playerSaveInterval = autosavePeriod;
+        }
+        this.profiler.push("save");
+        final boolean fullSave = autosavePeriod > 0 && this.tickCount % autosavePeriod == 0;
+        try {
+            this.isSaving = true;
+            if (playerSaveInterval > 0) {
+                this.playerList.saveAll(playerSaveInterval);
+            }
+            for (ServerLevel level : this.getAllLevels()) {
+                if (level.paperConfig().chunks.autoSaveInterval.value() > 0) {
+                    level.saveIncrementally(fullSave);
+                }
+            }
+        } finally {
+            this.isSaving = false;
         }
+        this.profiler.pop();
+        // Paper end - Incremental chunk and player saving
         // Paper start - move executeAll() into full server tick timing
         try (co.aikar.timings.Timing ignored = MinecraftTimings.processTasksTimer.startTiming()) {
             this.runAllTasks();
diff --git a/src/main/java/net/minecraft/server/level/ServerLevel.java b/src/main/java/net/minecraft/server/level/ServerLevel.java
index 46e8dd8dae25e1b2124e9c8031844fbe96eb6e1a..2766ec28f028c0bd672009928bf64c1a6e5d07d6 100644
--- a/src/main/java/net/minecraft/server/level/ServerLevel.java
+++ b/src/main/java/net/minecraft/server/level/ServerLevel.java
@@ -1358,6 +1358,35 @@ public class ServerLevel extends Level implements WorldGenLevel, ca.spottedleaf.
         return !this.server.isUnderSpawnProtection(this, pos, player) && this.getWorldBorder().isWithinBounds(pos);
     }
 
+    // Paper start - Incremental chunk and player saving
+    public void saveIncrementally(boolean doFull) {
+        ServerChunkCache chunkproviderserver = this.getChunkSource();
+
+        if (doFull) {
+            org.bukkit.Bukkit.getPluginManager().callEvent(new org.bukkit.event.world.WorldSaveEvent(getWorld()));
+        }
+
+        try (co.aikar.timings.Timing ignored = this.timings.worldSave.startTiming()) {
+            if (doFull) {
+                this.saveLevelData(true);
+            }
+
+            // chunk autosave is already called by the ChunkSystem during unload processing (ChunkMap#processUnloads)
+
+            // Copied from save()
+            // CraftBukkit start - moved from MinecraftServer.saveChunks
+            if (doFull) { // Paper
+                ServerLevel worldserver1 = this;
+
+                this.serverLevelData.setWorldBorder(worldserver1.getWorldBorder().createSettings());
+                this.serverLevelData.setCustomBossEvents(this.server.getCustomBossEvents().save(this.registryAccess()));
+                this.convertable.saveDataTag(this.server.registryAccess(), this.serverLevelData, this.server.getPlayerList().getSingleplayerData());
+            }
+            // CraftBukkit end
+        }
+    }
+    // Paper end - Incremental chunk and player saving
+
     public void save(@Nullable ProgressListener progressListener, boolean flush, boolean savingDisabled) {
         // Paper start - add close param
         this.save(progressListener, flush, savingDisabled, false);
diff --git a/src/main/java/net/minecraft/server/level/ServerPlayer.java b/src/main/java/net/minecraft/server/level/ServerPlayer.java
index dddd4fcdcd08e0221693071894818c7d3bae531b..5980b70e2d7273239245237189b2debcbccfbac3 100644
--- a/src/main/java/net/minecraft/server/level/ServerPlayer.java
+++ b/src/main/java/net/minecraft/server/level/ServerPlayer.java
@@ -203,6 +203,7 @@ import org.bukkit.inventory.MainHand;
 public class ServerPlayer extends net.minecraft.world.entity.player.Player implements ca.spottedleaf.moonrise.patches.chunk_system.player.ChunkSystemServerPlayer { // Paper - rewrite chunk system
 
     private static final Logger LOGGER = LogUtils.getLogger();
+    public long lastSave = MinecraftServer.currentTick; // Paper - Incremental chunk and player saving
     private static final int NEUTRAL_MOB_DEATH_NOTIFICATION_RADII_XZ = 32;
     private static final int NEUTRAL_MOB_DEATH_NOTIFICATION_RADII_Y = 10;
     private static final int FLY_STAT_RECORDING_SPEED = 25;
diff --git a/src/main/java/net/minecraft/server/players/PlayerList.java b/src/main/java/net/minecraft/server/players/PlayerList.java
index c38c688417f769a6022dd40d6652b00e14c4df94..43eeb8ce4bc350c2b524ade11ca25d8d4d21bea5 100644
--- a/src/main/java/net/minecraft/server/players/PlayerList.java
+++ b/src/main/java/net/minecraft/server/players/PlayerList.java
@@ -569,6 +569,7 @@ public abstract class PlayerList {
 
     protected void save(ServerPlayer player) {
         if (!player.getBukkitEntity().isPersistent()) return; // CraftBukkit
+        player.lastSave = MinecraftServer.currentTick; // Paper - Incremental chunk and player saving
         this.playerIo.save(player);
         ServerStatsCounter serverstatisticmanager = (ServerStatsCounter) player.getStats(); // CraftBukkit
 
@@ -1183,10 +1184,22 @@ public abstract class PlayerList {
     }
 
     public void saveAll() {
+        // Paper start - Incremental chunk and player saving
+        this.saveAll(-1);
+    }
+
+    public void saveAll(int interval) {
         io.papermc.paper.util.MCUtil.ensureMain("Save Players" , () -> { // Paper - Ensure main
         MinecraftTimings.savePlayers.startTiming(); // Paper
+        int numSaved = 0;
+        long now = MinecraftServer.currentTick;
         for (int i = 0; i < this.players.size(); ++i) {
-            this.save(this.players.get(i));
+            ServerPlayer entityplayer = this.players.get(i);
+            if (interval == -1 || now - entityplayer.lastSave >= interval) {
+                this.save(entityplayer);
+                if (interval != -1 && ++numSaved >= io.papermc.paper.configuration.GlobalConfiguration.get().playerAutoSave.maxPerTick()) { break; }
+            }
+            // Paper end - Incremental chunk and player saving
         }
         MinecraftTimings.savePlayers.stopTiming(); // Paper
         return null; }); // Paper - ensure main