Add loaded chunks count metrics

src/main/java/ru/ruscalworld/fabricexporter/FabricExporter.java

@@ -7,10 +7,7 @@ import net.minecraft.server.MinecraftServer;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 import ru.ruscalworld.fabricexporter.config.MainConfig;
-import ru.ruscalworld.fabricexporter.metrics.Entities;
+import ru.ruscalworld.fabricexporter.metrics.*;
-import ru.ruscalworld.fabricexporter.metrics.OnlinePlayers;
-import ru.ruscalworld.fabricexporter.metrics.TicksPerSecond;
-import ru.ruscalworld.fabricexporter.metrics.MillisPerTick;
 
 import java.io.IOException;
 import java.util.Timer;
@@ -35,6 +32,8 @@ public class FabricExporter implements ModInitializer {
         metricUpdater.registerMetric(new TicksPerSecond());
         metricUpdater.registerMetric(new MillisPerTick());
         metricUpdater.registerMetric(new Entities());
+        metricUpdater.registerMetric(new LoadedChunks());
+        metricUpdater.registerMetric(new TotalLoadedChunks());
 
         ServerLifecycleEvents.SERVER_STARTING.register(this::setServer);
         ServerLifecycleEvents.SERVER_STARTED.register(server -> {

src/main/java/ru/ruscalworld/fabricexporter/metrics/Entities.java

@@ -6,6 +6,7 @@ import net.minecraft.server.world.ServerWorld;
 import net.minecraft.util.Identifier;
 import net.minecraft.util.registry.Registry;
 import ru.ruscalworld.fabricexporter.FabricExporter;
+import ru.ruscalworld.fabricexporter.util.TextUtil;
 
 import java.util.HashMap;
 
@@ -28,7 +29,7 @@ public class Entities extends Metric {
             for (String type : currentWorldEntities.keySet()) {
                 Integer count = currentWorldEntities.get(type);
                 EntityType<?> entityType = Registry.ENTITY_TYPE.get(new Identifier(type));
-                this.getGauge().labels(world.getRegistryKey().getValue().getPath(), entityType.getSpawnGroup().getName(), type).set(count);
+                this.getGauge().labels(TextUtil.getWorldName(world), entityType.getSpawnGroup().getName(), type).set(count);
             }
         }
     }

src/main/java/ru/ruscalworld/fabricexporter/metrics/LoadedChunks.java

@@ -0,0 +1,18 @@
+package ru.ruscalworld.fabricexporter.metrics;
+
+import net.minecraft.server.world.ServerWorld;
+import ru.ruscalworld.fabricexporter.FabricExporter;
+import ru.ruscalworld.fabricexporter.util.TextUtil;
+
+public class LoadedChunks extends Metric {
+    public LoadedChunks() {
+        super("loaded_chunks", "Amount of currently loaded chunks on server", "world");
+    }
+
+    @Override
+    public void update(FabricExporter exporter) {
+        for (ServerWorld world : exporter.getServer().getWorlds()) {
+            this.getGauge().labels(TextUtil.getWorldName(world)).set(world.getChunkManager().getLoadedChunkCount());
+        }
+    }
+}

src/main/java/ru/ruscalworld/fabricexporter/metrics/OnlinePlayers.java

@@ -2,6 +2,7 @@ package ru.ruscalworld.fabricexporter.metrics;
 
 import net.minecraft.server.world.ServerWorld;
 import ru.ruscalworld.fabricexporter.FabricExporter;
+import ru.ruscalworld.fabricexporter.util.TextUtil;
 
 public class OnlinePlayers extends Metric {
     public OnlinePlayers() {
@@ -11,7 +12,7 @@ public class OnlinePlayers extends Metric {
     @Override
     public void update(FabricExporter exporter) {
         for (ServerWorld world : exporter.getServer().getWorlds()) {
-            this.getGauge().labels(world.getRegistryKey().getValue().getPath()).set(world.getPlayers().size());
+            this.getGauge().labels(TextUtil.getWorldName(world)).set(world.getPlayers().size());
         }
     }
 }

src/main/java/ru/ruscalworld/fabricexporter/metrics/TotalLoadedChunks.java

@@ -0,0 +1,18 @@
+package ru.ruscalworld.fabricexporter.metrics;
+
+import net.minecraft.server.world.ServerWorld;
+import ru.ruscalworld.fabricexporter.FabricExporter;
+import ru.ruscalworld.fabricexporter.util.TextUtil;
+
+public class TotalLoadedChunks extends Metric {
+    public TotalLoadedChunks() {
+        super("total_loaded_chunks", "Amount of total loaded chunks on server", "world");
+    }
+
+    @Override
+    public void update(FabricExporter exporter) {
+        for (ServerWorld world : exporter.getServer().getWorlds()) {
+            this.getGauge().labels(TextUtil.getWorldName(world)).set(world.getChunkManager().getTotalChunksLoadedCount());
+        }
+    }
+}

src/main/java/ru/ruscalworld/fabricexporter/util/TextUtil.java

@@ -0,0 +1,9 @@
+package ru.ruscalworld.fabricexporter.util;
+
+import net.minecraft.server.world.ServerWorld;
+
+public class TextUtil {
+    public static String getWorldName(ServerWorld world) {
+        return world.getRegistryKey().getValue().getPath();
+    }
+}