Caches.java

    static final RemovalListener<Object, EmpireUser> USER_REMOVAL_LISTENER = notification -> {
        final EmpireUser user = notification.getValue();
        switch (notification.getCause()) {
            case EXPIRED:
            case SIZE:
                if (user != null && user.getPlayer() != null && user.getPlayer().isOnline()) {
                    user.refreshCaches();
                }
        }
    };
    public static Cache<UUID, String> uuidToNameCache =
        CacheBuilder.newBuilder()
                    .maximumSize(100)
                    .expireAfterAccess(3, TimeUnit.DAYS)
                    .build();
    public static Cache<UUID, EmpireUser> EmpireUser_uuidCache =
        CacheBuilder.newBuilder()
                    .maximumSize(512)
                    .expireAfterAccess(15, TimeUnit.MINUTES)
                    .removalListener(USER_REMOVAL_LISTENER)
                    .build();
    public static Cache<String, EmpireUser> EmpireUser_nameCache =
        CacheBuilder.newBuilder()
                    .maximumSize(1024)
                    .expireAfterAccess(30, TimeUnit.MINUTES)
                    .removalListener(USER_REMOVAL_LISTENER)
                    .build();
    public static Cache<Long, EmpireUser> EmpireUser_userIdCache =
        CacheBuilder.newBuilder()
                    .maximumSize(1024)
                    .expireAfterAccess(30, TimeUnit.MINUTES)
                    .removalListener(USER_REMOVAL_LISTENER)
                    .build();
    public static LoadingCache<Long, Boolean> bannedCache =
        CacheBuilder.newBuilder()
                    .maximumSize(100)
                    .expireAfterWrite(5, TimeUnit.MINUTES)
                    .build(new CacheLoader<Long, Boolean>() {

                        @Override
                        public Boolean load(Long user) throws Exception {
                            try {
                                return EmpireDb.getFirstRow(
                                    "SELECT user_id FROM user_ban WHERE user_id = ?", user) != null;
                            } catch (SQLException e) {
                                Util.printException(
                                    "Exception in isBanned: " + user, e);
                            }
                            return false;
                        }
                    });