Use level keys

api/src/main/java/com/seibel/distanthorizons/coreapi/ModInfo.java

@@ -33,8 +33,8 @@ public final class ModInfo
 	// region Protocol versions
 	// Incremented every time any packets are added, changed or removed, with a few exceptions.
 	public static final int PROTOCOL_VERSION = 2;
-	public static final String PLUGIN_CHANNEL_PATH = "plugin_channel";
-	public static final String WRAPPER_PACKET_PATH = "wrapper";
+	public static final String PLUGIN_CHANNEL_PATH = "main";
+	public static final String WRAPPER_PACKET_PATH = "message";
 	// endregion
 	
 	

core/src/main/java/com/seibel/distanthorizons/core/api/internal/ClientApi.java

@@ -50,7 +50,6 @@ import com.seibel.distanthorizons.core.wrapperInterfaces.minecraft.IProfilerWrap
 import com.seibel.distanthorizons.core.wrapperInterfaces.world.IClientLevelWrapper;
 import com.seibel.distanthorizons.coreapi.DependencyInjection.ApiEventInjector;
 import com.seibel.distanthorizons.coreapi.util.math.Mat4f;
-import io.netty.buffer.ByteBuf;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 import org.jetbrains.annotations.NotNull;
@@ -132,6 +131,8 @@ public class ClientApi
 			DhClientWorld world = new DhClientWorld();
 			SharedApi.setDhWorld(world);
 			
+			this.pluginChannelApi.onJoin(world.networkState.getSession());
+			world.networkState.sendConfigMessage();
 			
 			LOGGER.info("Loading [" + this.waitingClientLevels.size() + "] waiting client level wrappers.");
 			for (IClientLevelWrapper level : this.waitingClientLevels)
@@ -140,8 +141,6 @@ public class ClientApi
 			}
 			
 			this.waitingClientLevels.clear();
-			
-			this.pluginChannelApi.onJoin(world.networkState.getSession());
 		}
 	}
 	
@@ -206,17 +205,20 @@ public class ClientApi
 	{
 		try
 		{
-			if (!this.pluginChannelApi.allowLoadingLevel())
-			{
-				LOGGER.info("Levels in this connection are managed by the server and loading is not allowed, ignoring auto-load.");
-				return;
-			}
-			
 			LOGGER.info("Loading client level [" + level + "]-["+level.getDimensionType().getDimensionName()+"].");
 			
 			AbstractDhWorld world = SharedApi.getAbstractDhWorld();
 			if (world != null)
 			{
+				if (!this.pluginChannelApi.allowLevelAutoload())
+				{
+					LOGGER.info("Levels in this connection are managed by the server, skipping auto-load.");
+					
+					// Instead of attempting to load themselves, send config and wait for level key.
+					((DhClientWorld) world).networkState.sendConfigMessage();
+					return;
+				}
+				
 				world.getOrLoadLevel(level);
 				ApiEventInjector.INSTANCE.fireAllEvents(DhApiLevelLoadEvent.class, new DhApiLevelLoadEvent.EventParam(level));
 				

core/src/main/java/com/seibel/distanthorizons/core/api/internal/ClientPluginChannelApi.java

@@ -7,18 +7,17 @@ import com.seibel.distanthorizons.core.level.IServerKeyedClientLevel;
 import com.seibel.distanthorizons.core.logging.ConfigBasedLogger;
 import com.seibel.distanthorizons.core.network.messages.plugin.PluginCloseEvent;
 import com.seibel.distanthorizons.core.network.messages.plugin.CurrentLevelKeyMessage;
-import com.seibel.distanthorizons.core.network.messages.plugin.base.ClientHelloMessage;
 import com.seibel.distanthorizons.core.network.plugin.PluginChannelSession;
 import com.seibel.distanthorizons.core.wrapperInterfaces.minecraft.IMinecraftClientWrapper;
 import com.seibel.distanthorizons.core.wrapperInterfaces.world.IClientLevelWrapper;
-import io.netty.buffer.ByteBuf;
 import org.apache.logging.log4j.LogManager;
+import org.checkerframework.checker.nullness.qual.NonNull;
 
+import java.util.Objects;
 import java.util.function.Consumer;
 
 /**
  * This class is used to manage the level keys.
- * Its purpose is to separate MC's and plugin channel's event handling.
  */
 public class ClientPluginChannelApi
 {
@@ -33,7 +32,7 @@ public class ClientPluginChannelApi
 	public PluginChannelSession session;
 	
 	
-	public boolean allowLoadingLevel()
+	public boolean allowLevelAutoload()
 	{
 		return (KEYED_CLIENT_LEVEL_MANAGER.isEnabled() && KEYED_CLIENT_LEVEL_MANAGER.getServerKeyedLevel() != null)
 				|| !KEYED_CLIENT_LEVEL_MANAGER.isEnabled();
@@ -44,15 +43,12 @@ public class ClientPluginChannelApi
 	{
 		this.levelUnloadHandler = levelUnloadHandler;
 		this.multiverseLevelLoadHandler = levelLoadHandler;
-		
 	}
 	
-	public void onJoin(PluginChannelSession session)
+	public void onJoin(@NonNull PluginChannelSession session)
 	{
+		Objects.requireNonNull(session);
 		this.session = session;
-		
-		this.session.sendMessage(new ClientHelloMessage());
-		
 		this.session.registerHandler(CurrentLevelKeyMessage.class, this::onCurrentLevelKeyMessage);
 		this.session.registerHandler(PluginCloseEvent.class, this::onClose);
 	}
@@ -71,7 +67,9 @@ public class ClientPluginChannelApi
 			
 			if (clientLevel != null)
 			{
+				// In either case only one of them will have an effect.
 				this.levelUnloadHandler.accept(clientLevel);
+				this.levelUnloadHandler.accept(KEYED_CLIENT_LEVEL_MANAGER.getServerKeyedLevel());
 			}
 			
 			IServerKeyedClientLevel keyedLevel = KEYED_CLIENT_LEVEL_MANAGER.setServerKeyedLevel(clientLevel, msg.levelKey);

core/src/main/java/com/seibel/distanthorizons/core/config/Config.java

@@ -899,6 +899,28 @@ public class Config
 							.build();
 					
 					
+					
+					public static ConfigEntry<Boolean> sendLevelKeys = new ConfigEntry.Builder<Boolean>()
+							.setServersideShortName("sendLevelKeys")
+							.setAppearance(EConfigEntryAppearance.ONLY_IN_FILE)
+							.set(true)
+							.comment(""
+									+ "Makes the server send level keys for each world.\n"
+									+ "Disable this if you use alternative ways to send level keys.\n"
+									+ "")
+							.build();
+					public static ConfigEntry<String> levelKeyPrefix = new ConfigEntry.Builder<String>()
+							.setServersideShortName("levelKeyPrefix")
+							.setAppearance(EConfigEntryAppearance.ONLY_IN_FILE)
+							.set("")
+							.comment(""
+									+ "Prefix of the level keys sent to the clients.\n"
+									+ "Should be set to a unique value for each backend server behind a proxy,\n"
+									+ "or empty if you don't use a proxy.\n"
+									+ "")
+							.build();
+					
+					
 					public static ConfigUIComment generationSectionNote = new ConfigUIComment();
 					public static ConfigEntry<Integer> generationRequestRCLimit = new ConfigEntry.Builder<Integer>()
 							.setServersideShortName("generationRequestRCLimit")

core/src/main/java/com/seibel/distanthorizons/core/multiplayer/client/ClientNetworkState.java

@@ -24,7 +24,7 @@ public class ClientNetworkState implements Closeable
 	
 	public MultiplayerConfig config = new MultiplayerConfig();
 	private volatile boolean configReceived = false;
-	private final MultiplayerConfigChangeListener configChangeListener = new MultiplayerConfigChangeListener(this::onConfigChanged);
+	private final MultiplayerConfigChangeListener configChangeListener = new MultiplayerConfigChangeListener(this::sendConfigMessage);
 	public boolean isReady() { return this.configReceived; }
 	
 	private final F3Screen.NestedMessage f3Message = new F3Screen.NestedMessage(this::f3Log);
@@ -55,7 +55,7 @@ public class ClientNetworkState implements Closeable
 		});
 	}
 	
-	private void onConfigChanged()
+	public void sendConfigMessage()
 	{
 		this.configReceived = false;
 		this.getSession().sendMessage(new RemotePlayerConfigMessage(new MultiplayerConfig()));

core/src/main/java/com/seibel/distanthorizons/core/multiplayer/config/AbstractMultiplayerConfig.java

@@ -9,7 +9,6 @@ public abstract class AbstractMultiplayerConfig implements INetworkObject
 	public abstract int getRenderDistanceRadius();
 	public abstract boolean isDistantGenerationEnabled();
 	public abstract int getFullDataRequestConcurrencyLimit();
-	public abstract int getGenTaskPriorityRequestRateLimit();
 	public abstract boolean isRealTimeUpdatesEnabled();
 	public abstract boolean isLoginDataSyncEnabled();
 	public abstract int getLoginDataSyncRCLimit();
@@ -20,7 +19,6 @@ public abstract class AbstractMultiplayerConfig implements INetworkObject
 		out.writeInt(this.getRenderDistanceRadius());
 		out.writeBoolean(this.isDistantGenerationEnabled());
 		out.writeInt(this.getFullDataRequestConcurrencyLimit());
-		out.writeInt(this.getGenTaskPriorityRequestRateLimit());
 		out.writeBoolean(this.isRealTimeUpdatesEnabled());
 		out.writeBoolean(this.isLoginDataSyncEnabled());
 		out.writeInt(this.getLoginDataSyncRCLimit());
@@ -34,7 +32,6 @@ public abstract class AbstractMultiplayerConfig implements INetworkObject
 				.add("renderDistanceRadius", this.getRenderDistanceRadius())
 				.add("distantGenerationEnabled", this.isDistantGenerationEnabled())
 				.add("fullDataRequestConcurrencyLimit", this.getFullDataRequestConcurrencyLimit())
-				.add("genTaskPriorityRequestRateLimit", this.getGenTaskPriorityRequestRateLimit())
 				.add("realTimeUpdatesEnabled", this.isRealTimeUpdatesEnabled())
 				.add("loginDataSyncEnabled", this.isLoginDataSyncEnabled())
 				.add("loginDataSyncRCLimit", this.getLoginDataSyncRCLimit())

core/src/main/java/com/seibel/distanthorizons/core/multiplayer/config/MultiplayerConfig.java

@@ -16,9 +16,6 @@ public class MultiplayerConfig extends AbstractMultiplayerConfig
 	public int fullDataRequestConcurrencyLimit = Config.Client.Advanced.Multiplayer.ServerNetworking.generationRequestRCLimit.get();
 	@Override public int getFullDataRequestConcurrencyLimit() { return this.fullDataRequestConcurrencyLimit; }
 	
-	public int genTaskPriorityRequestRateLimit = Config.Client.Advanced.Multiplayer.ServerNetworking.genTaskPriorityRequestRateLimit.get();
-	@Override public int getGenTaskPriorityRequestRateLimit() { return this.genTaskPriorityRequestRateLimit; }
-	
 	public boolean realTimeUpdatesEnabled = Config.Client.Advanced.Multiplayer.ServerNetworking.enableRealTimeUpdates.get();
 	@Override public boolean isRealTimeUpdatesEnabled() { return this.realTimeUpdatesEnabled; }
 	
@@ -35,7 +32,6 @@ public class MultiplayerConfig extends AbstractMultiplayerConfig
 		this.renderDistanceRadius = in.readInt();
 		this.distantGenerationEnabled = in.readBoolean();
 		this.fullDataRequestConcurrencyLimit = in.readInt();
-		this.genTaskPriorityRequestRateLimit = in.readInt();
 		this.realTimeUpdatesEnabled = in.readBoolean();
 		this.loginDataSyncEnabled = in.readBoolean();
 		this.loginDataSyncRCLimit = in.readInt();

core/src/main/java/com/seibel/distanthorizons/core/multiplayer/server/ConstrainedMultiplayerConfig.java

@@ -30,12 +30,6 @@ public class ConstrainedMultiplayerConfig extends AbstractMultiplayerConfig
 		return Math.min(this.clientConfig.fullDataRequestConcurrencyLimit, Config.Client.Advanced.Multiplayer.ServerNetworking.generationRequestRCLimit.get());
 	}
 	
-	@Override
-	public int getGenTaskPriorityRequestRateLimit()
-	{
-		return Math.min(this.clientConfig.genTaskPriorityRequestRateLimit, Config.Client.Advanced.Multiplayer.ServerNetworking.genTaskPriorityRequestRateLimit.get());
-	}
-	
 	@Override
 	public boolean isRealTimeUpdatesEnabled()
 	{

core/src/main/java/com/seibel/distanthorizons/core/multiplayer/server/RemotePlayerConnectionHandler.java

@@ -1,20 +1,14 @@
 package com.seibel.distanthorizons.core.multiplayer.server;
 
-import com.seibel.distanthorizons.core.config.Config;
-import com.seibel.distanthorizons.core.logging.ConfigBasedLogger;
 import com.seibel.distanthorizons.core.network.plugin.PluginChannelMessage;
 import com.seibel.distanthorizons.core.network.plugin.PluginChannelSession;
 import com.seibel.distanthorizons.core.wrapperInterfaces.misc.IServerPlayerWrapper;
-import org.apache.logging.log4j.LogManager;
 
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.ConcurrentMap;
 
 public class RemotePlayerConnectionHandler
 {
-	private static final ConfigBasedLogger LOGGER = new ConfigBasedLogger(LogManager.getLogger(),
-			() -> Config.Client.Advanced.Logging.logNetworkEvent.get());
-	
 	private final ConcurrentMap<IServerPlayerWrapper, ServerPlayerState> connectedPlayers = new ConcurrentHashMap<>();
 	
 	

core/src/main/java/com/seibel/distanthorizons/core/multiplayer/server/ServerPlayerState.java

@@ -5,9 +5,9 @@ import com.seibel.distanthorizons.core.level.DhServerLevel;
 import com.seibel.distanthorizons.core.logging.ConfigBasedLogger;
 import com.seibel.distanthorizons.core.multiplayer.config.MultiplayerConfig;
 import com.seibel.distanthorizons.core.multiplayer.config.MultiplayerConfigChangeListener;
+import com.seibel.distanthorizons.core.network.messages.plugin.CurrentLevelKeyMessage;
 import com.seibel.distanthorizons.core.network.messages.plugin.session.RemotePlayerConfigMessage;
 import com.seibel.distanthorizons.core.network.messages.plugin.PluginCloseEvent;
-import com.seibel.distanthorizons.core.network.messages.plugin.base.ClientHelloMessage;
 import com.seibel.distanthorizons.core.network.exceptions.RateLimitedException;
 import com.seibel.distanthorizons.core.network.messages.plugin.fullData.FullDataSourceRequestMessage;
 import com.seibel.distanthorizons.core.network.plugin.PluginChannelSession;
@@ -22,9 +22,6 @@ import static com.seibel.distanthorizons.core.config.Config.Client.Advanced.Mult
 
 public class ServerPlayerState
 {
-	private static final ConfigBasedLogger LOGGER = new ConfigBasedLogger(LogManager.getLogger(),
-			() -> Config.Client.Advanced.Logging.logNetworkEvent.get());
-	
 	public final PluginChannelSession session;
 	public IServerPlayerWrapper serverPlayer() { return this.session.serverPlayer; }
 	
@@ -51,11 +48,28 @@ public class ServerPlayerState
 		this.session.registerHandler(RemotePlayerConfigMessage.class, remotePlayerConfigMessage ->
 		{
 			this.config.clientConfig = (MultiplayerConfig) remotePlayerConfigMessage.payload;
+			
+			if (ServerNetworking.sendLevelKeys.get())
+			{
+				String levelKeyPrefix = ServerNetworking.levelKeyPrefix.get();
+				String dimensionName = serverPlayer.getLevel().getDimensionType().getDimensionName();
+				
+				String levelKey;
+				if (!levelKeyPrefix.isEmpty())
+				{
+					levelKey = levelKeyPrefix + "_" + dimensionName;
+				}
+				else
+				{
+					levelKey = dimensionName;
+				}
+				
+				this.session.sendMessage(new CurrentLevelKeyMessage(levelKey));
+			}
+			
 			this.session.sendMessage(new RemotePlayerConfigMessage(this.config));
 		});
 		
-		this.session.registerHandler(ClientHelloMessage.class, msg -> this.onConfigChanged());
-		
 		this.session.registerHandler(PluginCloseEvent.class, event -> {
 			// Noop
 		});

core/src/main/java/com/seibel/distanthorizons/core/network/messages/PluginMessageRegistry.java

@@ -22,7 +22,6 @@ package com.seibel.distanthorizons.core.network.messages;
 import com.google.common.collect.BiMap;
 import com.google.common.collect.HashBiMap;
 import com.seibel.distanthorizons.core.network.messages.plugin.CurrentLevelKeyMessage;
-import com.seibel.distanthorizons.core.network.messages.plugin.base.ClientHelloMessage;
 import com.seibel.distanthorizons.core.network.messages.plugin.base.CancelMessage;
 import com.seibel.distanthorizons.core.network.messages.plugin.base.CloseReasonMessage;
 import com.seibel.distanthorizons.core.network.messages.plugin.base.ExceptionMessage;
@@ -49,20 +48,19 @@ public class PluginMessageRegistry
 	{
 		// Note: Messages must have parameterless constructors
 		
-		// Always sent by the client
-		this.registerMessage(ClientHelloMessage.class, ClientHelloMessage::new);
+		// When the communication is about to be stopped, either side can send this message
 		this.registerMessage(CloseReasonMessage.class, CloseReasonMessage::new);
 		
-		// Multiverse support
+		// Level keys
 		this.registerMessage(CurrentLevelKeyMessage.class, CurrentLevelKeyMessage::new);
 		
-		// Core
+		// Config (for full DH support)
+		this.registerMessage(RemotePlayerConfigMessage.class, RemotePlayerConfigMessage::new);
+		
+		// Requests
 		this.registerMessage(CancelMessage.class, CancelMessage::new);
 		this.registerMessage(ExceptionMessage.class, ExceptionMessage::new);
 		
-		// ID & config
-		this.registerMessage(RemotePlayerConfigMessage.class, RemotePlayerConfigMessage::new);
-		
 		// Full data requests & updates
 		this.registerMessage(FullDataSourceRequestMessage.class, FullDataSourceRequestMessage::new);
 		this.registerMessage(FullDataSourceResponseMessage.class, FullDataSourceResponseMessage::new);

core/src/main/java/com/seibel/distanthorizons/core/network/messages/plugin/CurrentLevelKeyMessage.java

@@ -7,27 +7,23 @@ import io.netty.buffer.ByteBuf;
 public class CurrentLevelKeyMessage extends PluginChannelMessage
 {
 	public String levelKey;
-	public boolean deleteExistingData;
 	
 	public CurrentLevelKeyMessage() { }
-	public CurrentLevelKeyMessage(String levelKey, boolean deleteExistingData)
+	public CurrentLevelKeyMessage(String levelKey)
 	{
 		this.levelKey = levelKey;
-		this.deleteExistingData = deleteExistingData;
 	}
 	
 	@Override
 	public void encode(ByteBuf out)
 	{
 		this.writeString(this.levelKey, out);
-		out.writeBoolean(this.deleteExistingData);
 	}
 	
 	@Override
 	public void decode(ByteBuf in)
 	{
 		this.levelKey = this.readString(in);
-		this.deleteExistingData = in.readBoolean();
 	}
 	
 	
@@ -35,8 +31,7 @@ public class CurrentLevelKeyMessage extends PluginChannelMessage
 	public MoreObjects.ToStringHelper toStringHelper()
 	{
 		return super.toStringHelper()
-				.add("levelKey", this.levelKey)
-				.add("deleteExistingData", this.deleteExistingData);
+				.add("levelKey", this.levelKey);
 	}
 	
 }

core/src/main/java/com/seibel/distanthorizons/core/network/messages/plugin/base/ClientHelloMessage.java

@@ -1,22 +0,0 @@
-package com.seibel.distanthorizons.core.network.messages.plugin.base;
-
-import com.seibel.distanthorizons.core.network.plugin.PluginChannelMessage;
-import io.netty.buffer.ByteBuf;
-
-/**
- * Serves as a trigger for the server to send some useful data to the client.
- * Not integral to establishing a session.
- */
-public class ClientHelloMessage extends PluginChannelMessage
-{
-	@Override
-	public void encode(ByteBuf out)
-	{
-	}
-	
-	@Override
-	public void decode(ByteBuf in)
-	{
-	}
-	
-}

core/src/main/java/com/seibel/distanthorizons/core/network/plugin/PluginChannelSession.java

@@ -74,12 +74,6 @@ public class PluginChannelSession extends NetworkEventSource
 	{
 		LOGGER.debug("Sending message: {}", message);
 		
-		Consumer<ByteBuf> encoder = buffer -> {
-			buffer.writeShort(ModInfo.PROTOCOL_VERSION);
-			buffer.writeShort(PluginMessageRegistry.INSTANCE.getMessageId(message));
-			message.encode(buffer);
-		};
-		
 		if (this.serverPlayer != null)
 		{
 			PACKET_SENDER.sendPluginPacketServer(this.serverPlayer, message);

core/src/main/java/com/seibel/distanthorizons/core/world/DhClientWorld.java

@@ -19,7 +19,6 @@
 
 package com.seibel.distanthorizons.core.world;
 
-import com.seibel.distanthorizons.core.config.Config;
 import com.seibel.distanthorizons.core.file.structure.ClientOnlySaveStructure;
 import com.seibel.distanthorizons.core.level.DhClientLevel;
 import com.seibel.distanthorizons.core.level.IDhLevel;

core/src/main/java/com/seibel/distanthorizons/core/world/DhServerWorld.java

@@ -24,12 +24,10 @@ import com.seibel.distanthorizons.core.level.DhServerLevel;
 import com.seibel.distanthorizons.core.level.IDhLevel;
 import com.seibel.distanthorizons.core.multiplayer.server.RemotePlayerConnectionHandler;
 import com.seibel.distanthorizons.core.multiplayer.server.ServerPlayerState;
-import com.seibel.distanthorizons.core.network.plugin.PluginChannelMessage;
 import com.seibel.distanthorizons.core.util.LodUtil;
 import com.seibel.distanthorizons.core.wrapperInterfaces.misc.IServerPlayerWrapper;
 import com.seibel.distanthorizons.core.wrapperInterfaces.world.ILevelWrapper;
 import com.seibel.distanthorizons.core.wrapperInterfaces.world.IServerLevelWrapper;
-import io.netty.buffer.ByteBuf;
 import org.jetbrains.annotations.NotNull;
 
 import java.io.File;