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src/main/java/server/maps/MapMonitor.java

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+/*
+	This file is part of the OdinMS Maple Story Server
+    Copyright (C) 2008 Patrick Huy <patrick.huy@frz.cc>
+		       Matthias Butz <matze@odinms.de>
+		       Jan Christian Meyer <vimes@odinms.de>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as
+    published by the Free Software Foundation version 3 as published by
+    the Free Software Foundation. You may not use, modify or distribute
+    this program under any other version of the GNU Affero General Public
+    License.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+package server.maps;
+
+import java.util.concurrent.ScheduledFuture;
+import server.TimerManager;
+
+public class MapMonitor {
+    private ScheduledFuture<?> monitorSchedule;
+    private MapleMap map;
+    private MaplePortal portal;
+
+    public MapMonitor(final MapleMap map, String portal) {
+        this.map = map;
+        this.portal = map.getPortal(portal);
+        this.monitorSchedule = TimerManager.getInstance().register(new Runnable() {
+            @Override
+            public void run() {
+                if (map.getCharacters().size() < 1) {
+                    cancelAction();
+                }
+            }
+        }, 5000);
+    }
+
+    private void cancelAction() {
+        if (monitorSchedule != null) {  // thanks Thora for pointing a NPE occurring here
+            monitorSchedule.cancel(false);
+            monitorSchedule = null;
+        }
+        
+        map.killAllMonsters();
+        map.clearDrops();
+        if (portal != null) {
+            portal.setPortalStatus(MaplePortal.OPEN);
+        }
+        map.resetReactors();
+        
+        map = null;
+        portal = null;
+    }
+}