Mystic Doors review + Togglable SrvMessage-BossHP + Map-Event patch

Reviewed Mystic Doors.
Fixed several issues showing up on Duey in uncommon scenarios.
Fixed a concurrency issue with XMLDomMapleData.
Scheduled forward the "lock disposal" action within the source. Now, it's expected that, after a set while, no method should require usage of a disposed lock and, during that while, a supposed "disposed lock" is still available to run (although no new processes is expected to require use of these locks).
Fixed concurrency issues with player's current event instance, generating several inconsistencies when swiftly registering/unregistering from events.
Implemented a mutually exclusive approach for server message - Boss HPbar.
Fixed item-making Kage requiring lv71~80 ETC instead of the expected 81~90.
Removed the possibility to buy cosmetic coupons with mesos through the NPCs.
Sleepywood JQ's no longer gives cash items when they finish the quest repeatedly.
Added Duey trucks in several maps lacking it. Added NPC Duey in New Leaf City.
Fixed scripted quests not calculating QUEST_RATE (if applied) when rewarding experience and meso.

src/net/server/Server.java

@@ -60,6 +60,7 @@ import net.server.guild.MapleGuildCharacter;
 import net.server.worker.CharacterDiseaseWorker;
 import net.server.worker.CouponWorker;
 import net.server.worker.RankingWorker;
+import net.server.worker.ReleaseLockWorker;
 import net.server.world.World;
 
 import org.apache.mina.core.buffer.IoBuffer;
@@ -206,7 +207,11 @@ public class Server {
     public World getWorld(int id) {
         wldRLock.lock();
         try {
-            return worlds.get(id);
+            try {
+                return worlds.get(id);
+            } catch (IndexOutOfBoundsException e) {
+                return null;
+            }
         } finally {
             wldRLock.unlock();
         }
@@ -231,21 +236,33 @@ public class Server {
     }
     
     public Channel getChannel(int world, int channel) {
-        return this.getWorld(world).getChannel(channel);
+        try {
+            return this.getWorld(world).getChannel(channel);
+        } catch(NullPointerException npe) {
+            return null;
+        }
     }
 
     public List<Channel> getChannelsFromWorld(int world) {
-        return this.getWorld(world).getChannels();
+        try {
+            return this.getWorld(world).getChannels();
+        } catch(NullPointerException npe) {
+            return new ArrayList<>(0);
+        }
     }
     
     public List<Channel> getAllChannels() {
-        List<Channel> channelz = new ArrayList<>();
-        for (World world : this.getWorlds()) {
-            for (Channel ch : world.getChannels()) {
-                channelz.add(ch);
+        try {
+            List<Channel> channelz = new ArrayList<>();
+            for (World world : this.getWorlds()) {
+                for (Channel ch : world.getChannels()) {
+                    channelz.add(ch);
+                }
             }
+            return channelz;
+        } catch(NullPointerException npe) {
+            return new ArrayList<>(0);
         }
-        return channelz;
     }
     
     public Set<Integer> getOpenChannels(int world) {
@@ -257,7 +274,7 @@ public class Server {
         }
     }
     
-    public String getIP(int world, int channel) {
+    private String getIP(int world, int channel) {
         wldRLock.lock();
         try {
             return channels.get(world).get(channel);
@@ -266,6 +283,15 @@ public class Server {
         }
     }
     
+    public String[] getInetSocket(int world, int channel) {
+        try {
+            return getIP(world, channel).split(":");
+        } catch (Exception e) {
+            return null;
+        }
+    }
+    
+    
     private void dumpData() {
         wldWLock.lock();
         try {
@@ -643,6 +669,7 @@ public class Server {
         
         long timeLeft = getTimeLeftForNextHour();
         tMan.register(new CharacterDiseaseWorker(), ServerConstants.UPDATE_INTERVAL, ServerConstants.UPDATE_INTERVAL);
+        tMan.register(new ReleaseLockWorker(), 2 * 60 * 1000, 2 * 60 * 1000);
         tMan.register(new CouponWorker(), ServerConstants.COUPON_INTERVAL, timeLeft);
         tMan.register(new RankingWorker(), ServerConstants.RANKING_INTERVAL, timeLeft);
         
@@ -1149,8 +1176,10 @@ public class Server {
     }
     */
     
-    public Pair<Pair<Integer, List<MapleCharacter>>, List<Pair<Integer, List<MapleCharacter>>>> loadAccountCharlist(Integer accountId) {
+    public Pair<Pair<Integer, List<MapleCharacter>>, List<Pair<Integer, List<MapleCharacter>>>> loadAccountCharlist(Integer accountId, int visibleWorlds) {
         List<World> wlist = this.getWorlds();
+        if(wlist.size() > visibleWorlds) wlist = wlist.subList(0, visibleWorlds);
+        
         List<Pair<Integer, List<MapleCharacter>>> accChars = new ArrayList<>(wlist.size() + 1);
         int chrTotal = 0;
         List<MapleCharacter> lastwchars = null;