Add debug command to save the world and flush scheduled changed chunks

Also change the status command messages a little

BlueMapCommon/src/main/java/de/bluecolored/bluemap/common/plugin/Plugin.java

@@ -372,6 +372,15 @@ public MapUpdateHandler getUpdateHandler() {
 		return updateHandler;
 	}
 	
+	public boolean flushWorldUpdates(UUID worldUUID) throws IOException {
+		if (serverInterface.persistWorldChanges(worldUUID)) {
+			updateHandler.onWorldSaveToDisk(worldUUID);
+			return true;
+		}
+		
+		return false;
+	}
+	
 	public WebServer getWebServer() {
 		return webServer;
 	}
@@ -380,4 +389,8 @@ public boolean isLoaded() {
 		return loaded;
 	}
 	
+	public String getImplementationType() {
+		return implementationType;
+	}
+	
 }

BlueMapCommon/src/main/java/de/bluecolored/bluemap/common/plugin/commands/CommandHelper.java

@@ -42,6 +42,7 @@
 import de.bluecolored.bluemap.common.plugin.serverinterface.CommandSource;
 import de.bluecolored.bluemap.common.plugin.text.Text;
 import de.bluecolored.bluemap.common.plugin.text.TextColor;
+import de.bluecolored.bluemap.common.plugin.text.TextFormat;
 import de.bluecolored.bluemap.core.render.hires.HiresModelManager;
 import de.bluecolored.bluemap.core.world.World;
 
@@ -62,12 +63,29 @@ public List<Text> createStatusMessage(){
 		lines.add(Text.of(TextColor.BLUE, "Tile-Updates:"));
 		
 		if (renderer.isRunning()) {
-			lines.add(Text.of(TextColor.WHITE, " Render-Threads are ", Text.of(TextColor.GREEN, "running").setHoverText(Text.of("click to pause rendering")).setClickCommand("/bluemap pause"), TextColor.GRAY, "!"));
+			lines.add(Text.of(TextColor.WHITE, " Render-Threads are ", 
+					Text.of(TextColor.GREEN, "running")
+					.setHoverText(Text.of("click to pause rendering"))
+					.setClickCommand("/bluemap pause"), 
+					TextColor.GRAY, "!"));
 		} else {
-			lines.add(Text.of(TextColor.WHITE, " Render-Threads are ", Text.of(TextColor.RED, "paused").setHoverText(Text.of("click to resume rendering")).setClickCommand("/bluemap resume"), TextColor.GRAY, "!"));
+			lines.add(Text.of(TextColor.WHITE, " Render-Threads are ", 
+					Text.of(TextColor.RED, "paused")
+					.setHoverText(Text.of("click to resume rendering"))
+					.setClickCommand("/bluemap resume"),
+					TextColor.GRAY, "!"));
 		}
 		
-		lines.add(Text.of(TextColor.WHITE, " Scheduled tile-updates: ", Text.of(TextColor.GOLD, renderer.getQueueSize()).setHoverText(Text.of("tiles waiting for a free render-thread")), TextColor.GRAY, " + " , Text.of(TextColor.GRAY, plugin.getUpdateHandler().getUpdateBufferCount()).setHoverText(Text.of("tiles waiting for world-save"))));
+		lines.add(Text.of(
+				TextColor.WHITE, " Scheduled tile-updates: ", 
+				TextColor.GOLD, renderer.getQueueSize()).setHoverText(
+						Text.of(
+								TextColor.WHITE, "Tiles waiting for a free render-thread: ", TextColor.GOLD, renderer.getQueueSize(), 
+								TextColor.WHITE, "\n\nChunks marked as changed: ", TextColor.GOLD, plugin.getUpdateHandler().getUpdateBufferCount(),
+								TextColor.GRAY, TextFormat.ITALIC, "\n(Changed chunks will be rendered as soon as they are saved back to the world-files)"
+								)
+						)
+				);
 		
 		RenderTask[] tasks = renderer.getRenderTasks();
 		if (tasks.length > 0) {

BlueMapCommon/src/main/java/de/bluecolored/bluemap/common/plugin/commands/Commands.java

@@ -119,6 +119,12 @@ public void init() {
 										.then(argument("y", DoubleArgumentType.doubleArg())
 												.then(argument("z", DoubleArgumentType.doubleArg())
 														.executes(this::debugBlockCommand))))))
+
+				.then(literal("flush")
+						.executes(this::debugFlushCommand)
+						
+						.then(argument("world", StringArgumentType.string()).suggests(new WorldSuggestionProvider<>(plugin))
+								.executes(this::debugFlushCommand)))
 				
 				.then(literal("cache")
 						.executes(this::debugClearCacheCommand))
@@ -377,6 +383,47 @@ public int debugClearCacheCommand(CommandContext<S> context) throws CommandSynta
 		return 1;
 	}
 	
+
+	public int debugFlushCommand(CommandContext<S> context) throws CommandSyntaxException {
+		CommandSource source = commandSourceInterface.apply(context.getSource());
+		
+		// parse arguments
+		Optional<String> worldName = getOptionalArgument(context, "world", String.class);
+		
+		final World world;
+		if (worldName.isPresent()) {
+			world = parseWorld(worldName.get()).orElse(null);
+			
+			if (world == null) {
+				source.sendMessage(Text.of(TextColor.RED, "There is no ", helper.worldHelperHover(), " with this name: ", TextColor.WHITE, worldName.get()));
+				return 0;
+			}
+		} else {
+			world = source.getWorld().orElse(null);
+			
+			if (world == null) {
+				source.sendMessage(Text.of(TextColor.RED, "Can't detect a location from this command-source, you'll have to define a world!"));
+				return 0;
+			}
+		}
+		
+		new Thread(() -> {
+			source.sendMessage(Text.of(TextColor.GOLD, "Saving world and flushing changes..."));
+			try {
+				if (plugin.flushWorldUpdates(world.getUUID())) {
+					source.sendMessage(Text.of(TextColor.GREEN, "Successfully saved and flushed all changes."));
+				} else {
+					source.sendMessage(Text.of(TextColor.RED, "This operation is not supported by this implementation (" + plugin.getImplementationType() + ")"));
+				}
+			} catch (IOException ex) {
+				source.sendMessage(Text.of(TextColor.RED, "There was an unexpected exception trying to save the world. Please check the console for more details..."));
+				Logger.global.logError("Unexpected exception trying to save the world!", ex);
+			}
+		}).start();
+		
+		return 1;
+	}
+	
 	public int debugBlockCommand(CommandContext<S> context) throws CommandSyntaxException {
 		final CommandSource source = commandSourceInterface.apply(context.getSource());
 		
@@ -515,10 +562,17 @@ public int renderCommand(CommandContext<S> context) {
 		
 		// execute render
 		new Thread(() -> {
-			if (world != null) {
-				helper.createWorldRenderTask(source, world, center, radius);
-			} else {
-				helper.createMapRenderTask(source, map, center, radius);
+			try {
+				if (world != null) {
+					plugin.getServerInterface().persistWorldChanges(world.getUUID());
+					helper.createWorldRenderTask(source, world, center, radius);
+				} else {
+					plugin.getServerInterface().persistWorldChanges(map.getWorld().getUUID());
+					helper.createMapRenderTask(source, map, center, radius);
+				}
+			} catch (IOException ex) {
+				source.sendMessage(Text.of(TextColor.RED, "There was an unexpected exception trying to save the world. Please check the console for more details..."));
+				Logger.global.logError("Unexpected exception trying to save the world!", ex);
 			}
 		}).start();
 		

BlueMapCommon/src/main/java/de/bluecolored/bluemap/common/plugin/serverinterface/ServerInterface.java

@@ -63,6 +63,19 @@ default String getWorldName(UUID worldUUID) {
 		return null;
 	}
 	
+	/**
+	 * Attempts to persist all changes that have been made in a world to disk.
+	 * 
+	 * @param worldUUID The {@link UUID} of the world to be persisted.
+	 * @return <code>true</code> if the changes have been successfully persisted, <code>false</code> if this operation is not supported by the implementation
+	 * 
+	 * @throws IOException if something went wrong trying to persist the changes
+	 * @throws IllegalArgumentException if there is no world with this UUID
+	 */
+	default boolean persistWorldChanges(UUID worldUUID) throws IOException, IllegalArgumentException {
+		return false;
+	}
+	
 	/**
 	 * Returns the Folder containing the configurations for the plugin
 	 */

implementations/fabric-1.15.2/src/main/java/de/bluecolored/bluemap/fabric/FabricMod.java

@@ -33,7 +33,9 @@
 import java.util.Map;
 import java.util.Optional;
 import java.util.UUID;
+import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.ExecutionException;
 
 import org.apache.logging.log4j.LogManager;
 
@@ -164,6 +166,37 @@ private UUID loadUUIDForWorld(ServerWorld world) throws IOException {
 		File dimensionDir = world.getDimension().getType().getSaveDirectory(world.getSaveHandler().getWorldDir());
 		return getUUIDForWorld(dimensionDir.getCanonicalFile());
 	}
+	
+	@Override
+	public boolean persistWorldChanges(UUID worldUUID) throws IOException, IllegalArgumentException {
+		final CompletableFuture<Boolean> taskResult = new CompletableFuture<>();
+		
+		serverInstance.execute(() -> {
+			try {
+				for (ServerWorld world : serverInstance.getWorlds()) {
+					if (getUUIDForWorld(world).equals(worldUUID)) {
+						world.save(null, true, false);
+					}
+				}
+				
+				taskResult.complete(true);
+			} catch (Exception e) {
+				taskResult.completeExceptionally(e);
+			}
+		});
+		
+		try {
+			return taskResult.get();
+		} catch (InterruptedException e) {
+			Thread.currentThread().interrupt();
+			throw new IOException(e);
+		} catch (ExecutionException e) {
+			Throwable t = e.getCause();
+			if (t instanceof IOException) throw (IOException) t;
+			if (t instanceof IllegalArgumentException) throw (IllegalArgumentException) t;
+			throw new IOException(t);
+		}
+	}
 
 	@Override
 	public File getConfigFolder() {

implementations/fabric-1.16.1/src/main/java/de/bluecolored/bluemap/fabric/FabricMod.java

@@ -33,7 +33,9 @@
 import java.util.Map;
 import java.util.Optional;
 import java.util.UUID;
+import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.ExecutionException;
 
 import org.apache.logging.log4j.LogManager;
 
@@ -169,6 +171,37 @@ private UUID loadUUIDForWorld(ServerWorld world) throws IOException {
 		File dimensionDir = dimensionFolder.getCanonicalFile();
 		return getUUIDForWorld(dimensionDir);
 	}
+	
+	@Override
+	public boolean persistWorldChanges(UUID worldUUID) throws IOException, IllegalArgumentException {
+		final CompletableFuture<Boolean> taskResult = new CompletableFuture<>();
+		
+		serverInstance.execute(() -> {
+			try {
+				for (ServerWorld world : serverInstance.getWorlds()) {
+					if (getUUIDForWorld(world).equals(worldUUID)) {
+						world.save(null, true, false);
+					}
+				}
+				
+				taskResult.complete(true);
+			} catch (Exception e) {
+				taskResult.completeExceptionally(e);
+			}
+		});
+		
+		try {
+			return taskResult.get();
+		} catch (InterruptedException e) {
+			Thread.currentThread().interrupt();
+			throw new IOException(e);
+		} catch (ExecutionException e) {
+			Throwable t = e.getCause();
+			if (t instanceof IOException) throw (IOException) t;
+			if (t instanceof IllegalArgumentException) throw (IllegalArgumentException) t;
+			throw new IOException(t);
+		}
+	}
 
 	@Override
 	public File getConfigFolder() {

implementations/fabric-1.16.2/src/main/java/de/bluecolored/bluemap/fabric/FabricMod.java

@@ -33,7 +33,9 @@
 import java.util.Map;
 import java.util.Optional;
 import java.util.UUID;
+import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.ExecutionException;
 
 import org.apache.logging.log4j.LogManager;
 
@@ -169,6 +171,37 @@ private UUID loadUUIDForWorld(ServerWorld world) throws IOException {
 		File dimensionDir = dimensionFolder.getCanonicalFile();
 		return getUUIDForWorld(dimensionDir);
 	}
+	
+	@Override
+	public boolean persistWorldChanges(UUID worldUUID) throws IOException, IllegalArgumentException {
+		final CompletableFuture<Boolean> taskResult = new CompletableFuture<>();
+		
+		serverInstance.execute(() -> {
+			try {
+				for (ServerWorld world : serverInstance.getWorlds()) {
+					if (getUUIDForWorld(world).equals(worldUUID)) {
+						world.save(null, true, false);
+					}
+				}
+				
+				taskResult.complete(true);
+			} catch (Exception e) {
+				taskResult.completeExceptionally(e);
+			}
+		});
+		
+		try {
+			return taskResult.get();
+		} catch (InterruptedException e) {
+			Thread.currentThread().interrupt();
+			throw new IOException(e);
+		} catch (ExecutionException e) {
+			Throwable t = e.getCause();
+			if (t instanceof IOException) throw (IOException) t;
+			if (t instanceof IllegalArgumentException) throw (IllegalArgumentException) t;
+			throw new IOException(t);
+		}
+	}
 
 	@Override
 	public File getConfigFolder() {

implementations/forge-1.14.4/src/main/java/de/bluecolored/bluemap/forge/ForgeMod.java

@@ -33,7 +33,9 @@
 import java.util.Map;
 import java.util.Optional;
 import java.util.UUID;
+import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.ExecutionException;
 
 import org.apache.logging.log4j.LogManager;
 
@@ -185,6 +187,37 @@ private File getFolderForWorld(ServerWorld world) throws IOException {
 		
 		return worldFolder.getCanonicalFile();
 	}
+	
+	@Override
+	public boolean persistWorldChanges(UUID worldUUID) throws IOException, IllegalArgumentException {
+		final CompletableFuture<Boolean> taskResult = new CompletableFuture<>();
+		
+		serverInstance.execute(() -> {
+			try {
+				for (ServerWorld world : serverInstance.getWorlds()) {
+					if (getUUIDForWorld(world).equals(worldUUID)) {
+						world.save(null, true, false);
+					}
+				}
+				
+				taskResult.complete(true);
+			} catch (Exception e) {
+				taskResult.completeExceptionally(e);
+			}
+		});
+		
+		try {
+			return taskResult.get();
+		} catch (InterruptedException e) {
+			Thread.currentThread().interrupt();
+			throw new IOException(e);
+		} catch (ExecutionException e) {
+			Throwable t = e.getCause();
+			if (t instanceof IOException) throw (IOException) t;
+			if (t instanceof IllegalArgumentException) throw (IllegalArgumentException) t;
+			throw new IOException(t);
+		}
+	}
 
 	@Override
 	public File getConfigFolder() {

implementations/forge-1.15.2/src/main/java/de/bluecolored/bluemap/forge/ForgeMod.java

@@ -33,7 +33,9 @@
 import java.util.Map;
 import java.util.Optional;
 import java.util.UUID;
+import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.ExecutionException;
 
 import org.apache.logging.log4j.LogManager;
 
@@ -185,6 +187,37 @@ private File getFolderForWorld(ServerWorld world) throws IOException {
 		
 		return worldFolder.getCanonicalFile();
 	}
+	
+	@Override
+	public boolean persistWorldChanges(UUID worldUUID) throws IOException, IllegalArgumentException {
+		final CompletableFuture<Boolean> taskResult = new CompletableFuture<>();
+		
+		serverInstance.execute(() -> {
+			try {
+				for (ServerWorld world : serverInstance.getWorlds()) {
+					if (getUUIDForWorld(world).equals(worldUUID)) {
+						world.save(null, true, false);
+					}
+				}
+				
+				taskResult.complete(true);
+			} catch (Exception e) {
+				taskResult.completeExceptionally(e);
+			}
+		});
+		
+		try {
+			return taskResult.get();
+		} catch (InterruptedException e) {
+			Thread.currentThread().interrupt();
+			throw new IOException(e);
+		} catch (ExecutionException e) {
+			Throwable t = e.getCause();
+			if (t instanceof IOException) throw (IOException) t;
+			if (t instanceof IllegalArgumentException) throw (IllegalArgumentException) t;
+			throw new IOException(t);
+		}
+	}
 
 	@Override
 	public File getConfigFolder() {

implementations/forge-1.16.2/src/main/java/de/bluecolored/bluemap/forge/ForgeMod.java

@@ -33,7 +33,9 @@
 import java.util.Map;
 import java.util.Optional;
 import java.util.UUID;
+import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.ExecutionException;
 
 import org.apache.logging.log4j.LogManager;
 
@@ -183,6 +185,37 @@ private File getFolderForWorld(ServerWorld world) throws IOException {
 		File dimensionFolder = DimensionType.func_236031_a_(world.func_234923_W_(), worldFolder);
 		return dimensionFolder.getCanonicalFile();
 	}
+	
+	@Override
+	public boolean persistWorldChanges(UUID worldUUID) throws IOException, IllegalArgumentException {
+		final CompletableFuture<Boolean> taskResult = new CompletableFuture<>();
+		
+		serverInstance.execute(() -> {
+			try {
+				for (ServerWorld world : serverInstance.getWorlds()) {
+					if (getUUIDForWorld(world).equals(worldUUID)) {
+						world.save(null, true, false);
+					}
+				}
+				
+				taskResult.complete(true);
+			} catch (Exception e) {
+				taskResult.completeExceptionally(e);
+			}
+		});
+		
+		try {
+			return taskResult.get();
+		} catch (InterruptedException e) {
+			Thread.currentThread().interrupt();
+			throw new IOException(e);
+		} catch (ExecutionException e) {
+			Throwable t = e.getCause();
+			if (t instanceof IOException) throw (IOException) t;
+			if (t instanceof IllegalArgumentException) throw (IllegalArgumentException) t;
+			throw new IOException(t);
+		}
+	}
 
 	@Override
 	public File getConfigFolder() {

implementations/spigot/src/main/java/de/bluecolored/bluemap/bukkit/BukkitPlugin.java

@@ -259,6 +259,27 @@ public Optional<Player> getPlayer(UUID uuid) {
 		return Optional.ofNullable(onlinePlayerMap.get(uuid));
 	}
 	
+	@Override
+	public boolean persistWorldChanges(UUID worldUUID) throws IOException, IllegalArgumentException {
+		try {
+			return Bukkit.getScheduler().callSyncMethod(this, () -> {
+				World world = Bukkit.getWorld(worldUUID);
+				if (world == null) throw new IllegalArgumentException("There is no world with this uuid: " + worldUUID);
+				world.save();
+				
+				return true;
+			}).get();
+		} catch (InterruptedException e) {
+			Thread.currentThread().interrupt();
+			throw new IOException(e);
+		} catch (ExecutionException e) {
+			Throwable t = e.getCause();
+			if (t instanceof IOException) throw (IOException) t;
+			if (t instanceof IllegalArgumentException) throw (IllegalArgumentException) t;
+			throw new IOException(t);
+		}
+	}
+	
 	/**
 	 * Only update some of the online players each tick to minimize performance impact on the server-thread.
 	 * Only call this method on the server-thread.

implementations/spigot/src/main/java/de/bluecolored/bluemap/bukkit/EventForwarder.java

@@ -72,10 +72,8 @@ public synchronized void removeAllListeners() {
 
 	@EventHandler(priority = EventPriority.MONITOR, ignoreCancelled = true)
 	public synchronized void onChunkSaveToDisk(ChunkUnloadEvent evt) {
-		if (evt.isSaveChunk()) {
-			Vector2i chunkPos = new Vector2i(evt.getChunk().getX(), evt.getChunk().getZ());
-			for (ServerEventListener listener : listeners) listener.onChunkSaveToDisk(evt.getWorld().getUID(), chunkPos);		
-		}
+		Vector2i chunkPos = new Vector2i(evt.getChunk().getX(), evt.getChunk().getZ());
+		for (ServerEventListener listener : listeners) listener.onChunkSaveToDisk(evt.getWorld().getUID(), chunkPos);		
 	}
 	
 	/* Use ChunkSaveToDisk as it is the preferred event to use and more reliable on the chunk actually saved to disk

implementations/sponge-7.2.0/src/main/java/de/bluecolored/bluemap/sponge/SpongePlugin.java

@@ -35,6 +35,7 @@
 import java.util.Optional;
 import java.util.UUID;
 import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.ExecutionException;
 
 import javax.inject.Inject;
 
@@ -84,6 +85,7 @@ public class SpongePlugin implements ServerInterface {
 	private SpongeCommands commands;
 
 	private SpongeExecutorService asyncExecutor;
+	private SpongeExecutorService syncExecutor;
 	
 	private int playerUpdateIndex = 0;
 	private Map<UUID, Player> onlinePlayerMap;
@@ -110,6 +112,7 @@ public SpongePlugin(org.slf4j.Logger logger) {
 	@Listener
 	public void onServerStart(GameStartingServerEvent evt) {
 		asyncExecutor = Sponge.getScheduler().createAsyncExecutor(this);
+		syncExecutor = Sponge.getScheduler().createSyncExecutor(this);
 		
 		//save all world properties to generate level_sponge.dat files
 		for (WorldProperties properties : Sponge.getServer().getAllWorldProperties()) {
@@ -237,6 +240,27 @@ public boolean isMetricsEnabled(boolean configValue) {
 		return Sponge.getMetricsConfigManager().getGlobalCollectionState().asBoolean();
 	}
 	
+	@Override
+	public boolean persistWorldChanges(UUID worldUUID) throws IOException, IllegalArgumentException {
+		try {
+			return syncExecutor.submit(() -> {
+				World world = Sponge.getServer().getWorld(worldUUID).orElse(null);
+				if (world == null) throw new IllegalArgumentException("There is no world with this uuid: " + worldUUID);
+				world.save();
+				
+				return true;
+			}).get();
+		} catch (InterruptedException e) {
+			Thread.currentThread().interrupt();
+			throw new IOException(e);
+		} catch (ExecutionException e) {
+			Throwable t = e.getCause();
+			if (t instanceof IOException) throw (IOException) t;
+			if (t instanceof IllegalArgumentException) throw (IllegalArgumentException) t;
+			throw new IOException(t);
+		}
+	}
+	
 	/**
 	 * Only update some of the online players each tick to minimize performance impact on the server-thread.
 	 * Only call this method on the server-thread.