Paper/Spigot-Server-Patches/0391-incremental-chunk-saving.patch

From 7f430df08b80759b01c0a2db3938dc79d0858816 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 saving


diff --git a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
index de11a91af..4d3c6c6b4 100644
--- a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
+++ b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
@@ -489,4 +489,19 @@ public class PaperWorldConfig {
         keepLoadedRange = (short) (getInt("keep-spawn-loaded-range", Math.min(spigotConfig.viewDistance, 10)) * 16);
         log( "Keep Spawn Loaded Range: " + (keepLoadedRange/16));
     }
+
+    public int autoSavePeriod = -1;
+    private void autoSavePeriod() {
+        autoSavePeriod = getInt("auto-save-interval", -1);
+        if (autoSavePeriod > 0) {
+            log("Auto Save Interval: " +autoSavePeriod + " (" + (autoSavePeriod / 20) + "s)");
+        } else if (autoSavePeriod < 0) {
+            autoSavePeriod = net.minecraft.server.MinecraftServer.getServer().autosavePeriod;
+        }
+    }
+
+    public int maxAutoSaveChunksPerTick = 24;
+    private void maxAutoSaveChunksPerTick() {
+        maxAutoSaveChunksPerTick = getInt("max-auto-save-chunks-per-tick", 24);
+    }
 }
diff --git a/src/main/java/net/minecraft/server/Chunk.java b/src/main/java/net/minecraft/server/Chunk.java
index ee8f80174..2003522d9 100644
--- a/src/main/java/net/minecraft/server/Chunk.java
+++ b/src/main/java/net/minecraft/server/Chunk.java
@@ -42,7 +42,7 @@ public class Chunk implements IChunkAccess {
     private TickList<Block> o;
     private TickList<FluidType> p;
     private boolean q;
-    private long lastSaved;
+    public long lastSaved; // Paper
     private volatile boolean s;
     private long t;
     @Nullable
diff --git a/src/main/java/net/minecraft/server/ChunkProviderServer.java b/src/main/java/net/minecraft/server/ChunkProviderServer.java
index 162700313..535c2258b 100644
--- a/src/main/java/net/minecraft/server/ChunkProviderServer.java
+++ b/src/main/java/net/minecraft/server/ChunkProviderServer.java
@@ -335,6 +335,15 @@ public class ChunkProviderServer extends IChunkProvider {
         } // Paper - Timings
     }
 
+    // Paper start - duplicate save, but call incremental
+    public void saveIncrementally() {
+        this.tickDistanceManager();
+        try (co.aikar.timings.Timing timed = world.timings.chunkSaveData.startTiming()) { // Paper - Timings
+            this.playerChunkMap.saveIncrementally();
+        } // Paper - Timings
+    }
+    // Paper end
+
     @Override
     public void close() throws IOException {
         // CraftBukkit start
diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
index c58f6f50d..229336040 100644
--- a/src/main/java/net/minecraft/server/MinecraftServer.java
+++ b/src/main/java/net/minecraft/server/MinecraftServer.java
@@ -165,6 +165,7 @@ public abstract class MinecraftServer extends IAsyncTaskHandlerReentrant<TickTas
     public static int currentTick = 0; // Paper - Further improve tick loop
     public java.util.Queue<Runnable> processQueue = new java.util.concurrent.ConcurrentLinkedQueue<Runnable>();
     public int autosavePeriod;
+    public boolean serverAutoSave = false; // Paper
     public File bukkitDataPackFolder;
     public CommandDispatcher vanillaCommandDispatcher;
     private boolean forceTicks;
@@ -1085,14 +1086,28 @@ public abstract class MinecraftServer extends IAsyncTaskHandlerReentrant<TickTas
             this.serverPing.b().a(agameprofile);
         }
 
-        if (autosavePeriod > 0 && this.ticks % autosavePeriod == 0) { // CraftBukkit
+        //if (autosavePeriod > 0 && this.ticks % autosavePeriod == 0) { // CraftBukkit // Paper - move down
             MinecraftServer.LOGGER.debug("Autosave started");
+            serverAutoSave = (autosavePeriod > 0 && this.ticks % autosavePeriod == 0); // Paper
             this.methodProfiler.enter("save");
+            if (autosavePeriod > 0 && this.ticks % autosavePeriod == 0) { // Paper
             this.playerList.savePlayers();
-            this.saveChunks(true, false, false);
+            }// Paper
+            // Paper start
+            for (WorldServer world : getWorlds()) {
+                if (world.paperConfig.autoSavePeriod > 0) {
+                    try {
+                        world.saveIncrementally(serverAutoSave);
+                    } catch (ExceptionWorldConflict exceptionWorldConflict) {
+                        MinecraftServer.LOGGER.warn(exceptionWorldConflict.getMessage());
+                    }
+                }
+            }
+            // Paper end
+
             this.methodProfiler.exit();
             MinecraftServer.LOGGER.debug("Autosave finished");
-        }
+        //} // Paper
 
         this.methodProfiler.enter("snooper");
         if (((DedicatedServer) this).getDedicatedServerProperties().snooperEnabled && !this.snooper.d() && this.ticks > 100) { // Spigot
diff --git a/src/main/java/net/minecraft/server/PlayerChunkMap.java b/src/main/java/net/minecraft/server/PlayerChunkMap.java
index 493770bf6..2be6fa0f0 100644
--- a/src/main/java/net/minecraft/server/PlayerChunkMap.java
+++ b/src/main/java/net/minecraft/server/PlayerChunkMap.java
@@ -297,6 +297,36 @@ public class PlayerChunkMap extends IChunkLoader implements PlayerChunk.d {
         super.close();
     }
 
+    // Paper start - derived from below
+    protected void saveIncrementally() {
+        int savedThisTick = 0;
+        for (PlayerChunk playerchunk : visibleChunks.values()) {
+            if (playerchunk.hasBeenLoaded()) {
+
+                IChunkAccess ichunkaccess = (IChunkAccess) playerchunk.getChunkSave().getNow(null); // CraftBukkit - decompile error
+
+
+                if (ichunkaccess instanceof ProtoChunkExtension || ichunkaccess instanceof Chunk) {
+                    boolean shouldSave = true;
+
+                    if (ichunkaccess instanceof Chunk) {
+                        shouldSave = ((Chunk) ichunkaccess).lastSaved + world.paperConfig.autoSavePeriod <= world.getTime();
+                    }
+
+                    if (shouldSave && this.saveChunk(ichunkaccess)) {
+                        ++savedThisTick;
+                        playerchunk.m();
+                    }
+                }
+
+                if (savedThisTick >= world.paperConfig.maxAutoSaveChunksPerTick) {
+                    return;
+                }
+            }
+        }
+    }
+    // paper end
+
     protected void save(boolean flag) {
         if (flag) {
             List<PlayerChunk> list = (List) this.visibleChunks.values().stream().filter(PlayerChunk::hasBeenLoaded).peek(PlayerChunk::m).collect(Collectors.toList());
diff --git a/src/main/java/net/minecraft/server/WorldServer.java b/src/main/java/net/minecraft/server/WorldServer.java
index 8a3124fed..e4cc24806 100644
--- a/src/main/java/net/minecraft/server/WorldServer.java
+++ b/src/main/java/net/minecraft/server/WorldServer.java
@@ -756,11 +756,44 @@ public class WorldServer extends World {
         return this.worldProvider.d();
     }
 
+    // Paper start - derived from below
+    public void saveIncrementally(boolean doFull) throws ExceptionWorldConflict {
+        ChunkProviderServer chunkproviderserver = this.getChunkProvider();
+
+        if (doFull) {
+            org.bukkit.Bukkit.getPluginManager().callEvent(new org.bukkit.event.world.WorldSaveEvent(getWorld()));
+        }
+
+        try (co.aikar.timings.Timing ignored = timings.worldSave.startTiming()) {
+            if (doFull) {
+                this.k_();
+            }
+
+            timings.worldSaveChunks.startTiming(); // Paper
+            if (!this.isSavingDisabled()) chunkproviderserver.saveIncrementally();
+            timings.worldSaveChunks.stopTiming(); // Paper
+
+
+            // CraftBukkit start - moved from MinecraftServer.saveChunks
+            // PAIL - rename
+            if (doFull) {
+                WorldServer worldserver1 = this;
+                WorldData worlddata = worldserver1.getWorldData();
+
+                worldserver1.getWorldBorder().a(worlddata);
+                worlddata.c(this.server.getBossBattleCustomData().c());
+                worldserver1.getDataManager().saveWorldData(worlddata, this.server.getPlayerList().r());
+                // CraftBukkit end
+            }
+        }
+    }
+    // Paper end
+
     public void save(@Nullable IProgressUpdate iprogressupdate, boolean flag, boolean flag1) throws ExceptionWorldConflict {
         ChunkProviderServer chunkproviderserver = this.getChunkProvider();
 
         if (!flag1) {
-            org.bukkit.Bukkit.getPluginManager().callEvent(new org.bukkit.event.world.WorldSaveEvent(getWorld())); // CraftBukkit
+            if (flag) org.bukkit.Bukkit.getPluginManager().callEvent(new org.bukkit.event.world.WorldSaveEvent(getWorld())); // CraftBukkit
             try (co.aikar.timings.Timing ignored = timings.worldSave.startTiming()) { // Paper
             if (iprogressupdate != null) {
                 iprogressupdate.a(new ChatMessage("menu.savingLevel", new Object[0]));
-- 
2.23.0