feat: track entity kills by player

src/main/java/com/prometheus/spigot/PrometheusSpigotPlugin.java

@@ -2,11 +2,14 @@ package com.prometheus.spigot;
 
 import com.prometheus.spigot.http.MetricsHttpHandler;
 import com.prometheus.spigot.listeners.BlockBreakListener;
+import com.prometheus.spigot.listeners.BlockPlaceListener;
 import com.prometheus.spigot.listeners.ChatListener;
 import com.prometheus.spigot.listeners.ChunkListener;
 import com.prometheus.spigot.listeners.CommandListener;
 import com.prometheus.spigot.listeners.ConnectionListener;
+import com.prometheus.spigot.listeners.CraftListener;
 import com.prometheus.spigot.listeners.DeathListener;
+import com.prometheus.spigot.listeners.EntityKillListener;
 import com.prometheus.spigot.listeners.MoveListener;
 import com.prometheus.spigot.listeners.PluginListener;
 import com.prometheus.spigot.metrics.MetricsRegistry;
@@ -71,6 +74,7 @@ public final class PrometheusSpigotPlugin extends JavaPlugin {
     private void registerListeners() {
         var pluginManager = getServer().getPluginManager();
         pluginManager.registerEvents(new BlockBreakListener(metricsRegistry), this);
+        pluginManager.registerEvents(new BlockPlaceListener(metricsRegistry), this);
         pluginManager.registerEvents(new DeathListener(metricsRegistry), this);
         pluginManager.registerEvents(new ChatListener(metricsRegistry), this);
         pluginManager.registerEvents(new MoveListener(metricsRegistry, countBlockMovementOnly), this);
@@ -78,6 +82,8 @@ public final class PrometheusSpigotPlugin extends JavaPlugin {
         pluginManager.registerEvents(new CommandListener(metricsRegistry), this);
         pluginManager.registerEvents(new ChunkListener(metricsRegistry), this);
         pluginManager.registerEvents(new PluginListener(metricsRegistry), this);
+        pluginManager.registerEvents(new CraftListener(metricsRegistry), this);
+        pluginManager.registerEvents(new EntityKillListener(metricsRegistry), this);
     }
 
     private void startHttpServer() {

src/main/java/com/prometheus/spigot/listeners/BlockPlaceListener.java

@@ -0,0 +1,19 @@
+package com.prometheus.spigot.listeners;
+
+import com.prometheus.spigot.metrics.MetricsRegistry;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.Listener;
+import org.bukkit.event.block.BlockPlaceEvent;
+
+public final class BlockPlaceListener implements Listener {
+    private final MetricsRegistry registry;
+
+    public BlockPlaceListener(MetricsRegistry registry) {
+        this.registry = registry;
+    }
+
+    @EventHandler
+    public void onBlockPlace(BlockPlaceEvent event) {
+        registry.incrementBlocksPlaced(event.getBlockPlaced().getType());
+    }
+}

src/main/java/com/prometheus/spigot/listeners/CraftListener.java

@@ -0,0 +1,25 @@
+package com.prometheus.spigot.listeners;
+
+import com.prometheus.spigot.metrics.MetricsRegistry;
+import org.bukkit.Material;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.Listener;
+import org.bukkit.event.inventory.CraftItemEvent;
+import org.bukkit.inventory.ItemStack;
+
+public final class CraftListener implements Listener {
+    private final MetricsRegistry registry;
+
+    public CraftListener(MetricsRegistry registry) {
+        this.registry = registry;
+    }
+
+    @EventHandler
+    public void onCraft(CraftItemEvent event) {
+        ItemStack result = event.getRecipe() != null ? event.getRecipe().getResult() : null;
+        if (result == null || result.getType() == Material.AIR) {
+            return;
+        }
+        registry.incrementItemsCrafted(result.getType());
+    }
+}

src/main/java/com/prometheus/spigot/listeners/EntityKillListener.java

@@ -0,0 +1,22 @@
+package com.prometheus.spigot.listeners;
+
+import com.prometheus.spigot.metrics.MetricsRegistry;
+import org.bukkit.entity.Player;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.Listener;
+import org.bukkit.event.entity.EntityDeathEvent;
+
+public final class EntityKillListener implements Listener {
+    private final MetricsRegistry registry;
+
+    public EntityKillListener(MetricsRegistry registry) {
+        this.registry = registry;
+    }
+
+    @EventHandler
+    public void onEntityDeath(EntityDeathEvent event) {
+        Player killer = event.getEntity().getKiller();
+        String killerLabel = killer != null ? killer.getName() : "null";
+        registry.incrementEntityKill(event.getEntity().getType(), killerLabel);
+    }
+}

src/main/java/com/prometheus/spigot/metrics/MetricsRegistry.java

@@ -44,11 +44,14 @@ public final class MetricsRegistry {
     private final LongAdder chunkGenerations = new LongAdder();
     private final LongAdder pluginEnables = new LongAdder();
     private final LongAdder pluginDisables = new LongAdder();
+    private final ConcurrentHashMap<String, LongAdder> blocksPlacedByMaterial = new ConcurrentHashMap<>();
     private final ConcurrentHashMap<String, LongAdder> blocksBrokenByMaterial = new ConcurrentHashMap<>();
     private final ConcurrentHashMap<String, LongAdder> deathsByCause = new ConcurrentHashMap<>();
     private final ConcurrentHashMap<String, LongAdder> loginFailuresByReason = new ConcurrentHashMap<>();
     private final ConcurrentHashMap<String, LongAdder> commandsBlocked = new ConcurrentHashMap<>();
     private final ConcurrentHashMap<LabelPair, LongAdder> commandsExecuted = new ConcurrentHashMap<>();
+    private final ConcurrentHashMap<String, LongAdder> itemsCraftedByMaterial = new ConcurrentHashMap<>();
+    private final ConcurrentHashMap<LabelPair, LongAdder> entityKills = new ConcurrentHashMap<>();
 
     public MetricsRegistry(Server server, boolean enableJvm, boolean enableProcess) {
         this.server = server;
@@ -85,6 +88,10 @@ public final class MetricsRegistry {
         incrementLabeledCounter(blocksBrokenByMaterial, material.name());
     }
 
+    public void incrementBlocksPlaced(Material material) {
+        incrementLabeledCounter(blocksPlacedByMaterial, material.name());
+    }
+
     public void incrementPlayerDeath(EntityDamageEvent.DamageCause cause) {
         incrementLabeledCounter(deathsByCause, cause.name());
     }
@@ -123,6 +130,16 @@ public final class MetricsRegistry {
         pluginDisables.increment();
     }
 
+    public void incrementItemsCrafted(Material material) {
+        incrementLabeledCounter(itemsCraftedByMaterial, material.name());
+    }
+
+    public void incrementEntityKill(EntityType entityType, String killer) {
+        String normalizedEntity = normalizeLabel(entityType.name());
+        String normalizedKiller = normalizeLabel(killer);
+        entityKills.computeIfAbsent(new LabelPair(normalizedEntity, normalizedKiller), key -> new LongAdder()).increment();
+    }
+
     public void refreshEntitySnapshots() {
         Map<String, Long> entityCounts = new HashMap<>();
         Map<String, Long> tileCounts = new HashMap<>();
@@ -168,10 +185,13 @@ public final class MetricsRegistry {
         appendCounter(builder, "spigot_plugin_disable_total", "Total plugin disable events", pluginDisables.sum());
 
         appendLabeledCounterAdder(builder, "spigot_blocks_broken_total", "Blocks broken by material", "material", blocksBrokenByMaterial);
+        appendLabeledCounterAdder(builder, "spigot_blocks_placed_total", "Blocks placed by material", "material", blocksPlacedByMaterial);
         appendLabeledCounterAdder(builder, "spigot_player_deaths_total", "Player deaths by cause", "cause", deathsByCause);
         appendLabeledCounterAdder(builder, "spigot_player_logins_failed_total", "Failed player logins by reason", "reason", loginFailuresByReason);
         appendLabeledCounterAdder(builder, "spigot_commands_blocked_total", "Blocked commands by name", "command", commandsBlocked);
         appendLabeledCounterAdder(builder, "spigot_commands_executed_total", "Commands executed by source", "command", "source", commandsExecuted);
+        appendLabeledCounterAdder(builder, "spigot_items_crafted_total", "Items crafted by material", "material", itemsCraftedByMaterial);
+        appendLabeledCounterAdder(builder, "spigot_entities_killed_total", "Entities killed by player", "entity", "killer", entityKills);
 
         appendGauge(builder, "spigot_players_online", "Online player count", server.getOnlinePlayers().size());
         appendGauge(builder, "spigot_players_max", "Max player slots", server.getMaxPlayers());