src/de/steamwar/bungeecore/BungeeCore.java

@@ -25,10 +25,7 @@ import de.steamwar.bungeecore.commands.*;
 import de.steamwar.bungeecore.comms.SpigotReceiver;
 import de.steamwar.bungeecore.listeners.*;
 import de.steamwar.bungeecore.listeners.mods.*;
-import de.steamwar.bungeecore.sql.Punishment;
-import de.steamwar.bungeecore.sql.Statement;
-import de.steamwar.bungeecore.sql.SteamwarUser;
-import de.steamwar.bungeecore.sql.Team;
+import de.steamwar.bungeecore.sql.*;
 import net.md_5.bungee.api.ChatMessageType;
 import net.md_5.bungee.api.CommandSender;
 import net.md_5.bungee.api.ProxyServer;
@@ -156,6 +153,7 @@ public class BungeeCore extends Plugin {
 
         getProxy().getScheduler().schedule(this, () -> {
             SteamwarUser.clearCache();
+            UserElo.clearCache();
             Team.clearCache();
         }, 1, 1, TimeUnit.HOURS);
 

src/de/steamwar/bungeecore/sql/UserElo.java

@@ -19,21 +19,61 @@
 
 package de.steamwar.bungeecore.sql;
 
+import lombok.AllArgsConstructor;
+import lombok.EqualsAndHashCode;
+
+import java.util.HashMap;
+import java.util.Map;
 import java.util.Optional;
 
 public class UserElo {
     private UserElo() {
     }
 
+    private static Integer cachedSeason = null;
+    private static final Map<Key, Optional<Integer>> userEloCache = new HashMap<>();
+    private static final Map<String, Integer> maxEloCache = new HashMap<>();
+
+    @AllArgsConstructor
+    @EqualsAndHashCode
+    private static class Key {
+        private final int userId;
+        private final String gameMode;
+    }
+
     private static final Statement elo = new Statement("SELECT UserElo FROM Elo WHERE UserID = ? AND GameMode = ? AND Season = ?");
     private static final Statement setElo = new Statement("UPDATE UserELo SET Elo = ? WHERE Season = ? AND UserID = ? AND GameMode = ?");
     private static final Statement place = new Statement("SELECT COUNT(*) AS Place FROM UserElo WHERE GameMode = ? AND Elo > ? AND Season = ?");
+    private static final Statement maxElo = new Statement("SELECT MAX(Elo) AS MaxElo FROM UserElo WHERE Season = ? AND GameMode = ?");
+
+    private static void clearCacheIfNeeded(int season) {
+        int currentSeason = Season.getSeason();
+        if (currentSeason != season) {
+            return;
+        }
+        if (cachedSeason != null && cachedSeason != currentSeason) {
+            clearCache();
+            cachedSeason = currentSeason;
+        }
+        return;
+    }
 
     public static Optional<Integer> getElo(int userID, String gameMode) {
         return getElo(Season.getSeason(), userID, gameMode);
     }
 
     public static Optional<Integer> getElo(int season, int userID, String gameMode) {
+        clearCacheIfNeeded(season);
+        if (season == Season.getSeason()) {
+            Key key = new Key(userID, gameMode);
+            return userEloCache.computeIfAbsent(key, k -> {
+                return elo.select(rs -> {
+                    if (rs.next())
+                        return Optional.of(rs.getInt("UserElo"));
+                    return Optional.empty();
+                });
+            });
+        }
         return elo.select(rs -> {
             if (rs.next())
                 return Optional.of(rs.getInt("Elo"));
@@ -41,11 +81,43 @@ public class UserElo {
         }, userID, gameMode, season);
     }
 
+    public static int getMaxElo(String gameMode) {
+        return getMaxElo(Season.getSeason(), gameMode);
+    }
+
+    public static int getMaxElo(int season, String gameMode) {
+        clearCacheIfNeeded(season);
+        if (season == Season.getSeason()) {
+            return maxEloCache.computeIfAbsent(gameMode, gm -> {
+                return maxElo.select(rs -> {
+                    if (rs.next())
+                        return rs.getInt("MaxElo");
+                    return -1;
+                });
+            });
+        }
+        return maxElo.select(rs -> {
+            if (rs.next())
+                return rs.getInt("MaxElo");
+            return -1;
+        }, season, gameMode);
+    }
+
     public static void setElo(int userId, String gameMode, int elo) {
         setElo(Season.getSeason(), userId, gameMode, elo);
     }
 
     public static void setElo(int season, int userId, String gameMode, int elo) {
+        clearCacheIfNeeded(season);
+        if (season == Season.getSeason()) {
+            Key key = new Key(userId, gameMode);
+            userEloCache.put(key, Optional.of(elo));
+            maxEloCache.compute(gameMode, (gm, max) -> {
+                if (max == null || max < elo)
+                    return elo;
+                return max;
+            });
+        }
         setElo.update(elo, season, userId, gameMode);
     }
 
@@ -60,4 +132,9 @@ public class UserElo {
             return -1;
         }, gameMode, elo, season);
     }
+
+    public static void clearCache() {
+        userEloCache.clear();
+        maxEloCache.clear();
+    }
 }