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Add "resendchunks" sub-command to "/paper". #12882

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Mickey42302 wants to merge 2 commits into from
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Add "resendchunks" sub-command to "/paper". #12882

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Mickey42302 Jul 22, 2025
4482919
Update PaperCommand.java
Mickey42302 Jul 22, 2025
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2 changes: 2 additions & 0 deletions paper-server/src/main/java/io/papermc/paper/command/PaperCommand.java
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Original file line number Diff line number Diff line change
Expand Up @@ -8,6 +8,7 @@
import io.papermc.paper.command.subcommands.HeapDumpCommand;
import io.papermc.paper.command.subcommands.MobcapsCommand;
import io.papermc.paper.command.subcommands.ReloadCommand;
import io.papermc.paper.command.subcommands.ResendChunksCommand;
import io.papermc.paper.command.subcommands.SyncLoadInfoCommand;
import io.papermc.paper.command.subcommands.VersionCommand;
import it.unimi.dsi.fastutil.Pair;
Expand Down Expand Up @@ -51,6 +52,7 @@ public final class PaperCommand extends Command {
commands.put(Set.of("dumpitem"), new DumpItemCommand());
commands.put(Set.of("mobcaps", "playermobcaps"), new MobcapsCommand());
commands.put(Set.of("dumplisteners"), new DumpListenersCommand());
commands.put(Set.of("resendchunks"), new ResendChunksCommand());
FeatureHooks.registerPaperCommands(commands);

return commands.entrySet().stream()
Expand Down
42 changes: 42 additions & 0 deletions paper-server/src/main/java/io/papermc/paper/command/subcommands/ResendChunksCommand.java
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Original file line number Diff line number Diff line change
@@ -0,0 +1,42 @@
package io.papermc.paper.command.subcommands;

import io.papermc.paper.command.PaperSubcommand;
import net.minecraft.network.chat.Component;
import net.minecraft.server.level.ServerPlayer;
import net.minecraft.server.network.PlayerChunkSender;
import net.minecraft.world.level.ChunkPos;
import org.bukkit.Chunk;
import org.bukkit.command.CommandSender;
import org.bukkit.craftbukkit.entity.CraftPlayer;
import org.bukkit.entity.Player;
import org.checkerframework.checker.nullness.qual.NonNull;
import org.checkerframework.framework.qual.DefaultQualifier;
import org.jetbrains.annotations.NotNull;

import java.util.stream.Collectors;

@DefaultQualifier(NonNull.class)
public final class ResendChunksCommand implements PaperSubcommand {
@Override
public boolean execute(final CommandSender sender, final String subCommand, final String[] args) {
if (sender instanceof Player player) {
final ServerPlayer serverPlayer = ((CraftPlayer) player).getHandle();
PlayerChunkSender chunkSender = serverPlayer.connection.chunkSender;
int resent = 0;

for (ChunkPos chunkPos : serverPlayer.getBukkitEntity().getSentChunks().stream().map(ResendChunksCommand::bukkitChunk2ChunkPos).collect(Collectors.toSet())) {
chunkSender.dropChunk(serverPlayer, chunkPos);
PlayerChunkSender.sendChunk(serverPlayer.connection, serverPlayer.level(), serverPlayer.level().getChunk(chunkPos.x, chunkPos.z));
resent++;
}
serverPlayer.sendSystemMessage(Component.literal("Resent " + resent + " chunks to client"));
} else {
sender.sendMessage("Only a player can execute this command.");
}
return true;
}

public static @NotNull ChunkPos bukkitChunk2ChunkPos(@NotNull Chunk chunk) {
return new ChunkPos(chunk.getX(), chunk.getZ());
}
}