Dynamic World/Channel shutdown + Equip levels on Duey + AP/SP patch

Implemented dynamic world/channel shutdown, coupling with the dynamic deployment from last commit rendering on a fully automated world/channel management.
Fixed some spawned mobs not being properly registered on events.
Implemented a respawn mechanic sensitive to number of players on map. More mobs will spawn the greater the number of players is. Server flag: USE_ENABLE_FULL_RESPAWN = false.
Implemented a mechanic for delayed mob loot drops, on which the delay is determined by the death animation duration. Server flag: USE_SPAWN_LOOT_ON_ANIMATION = true.
Fixed EIM being disposed incorrectly when the dispose is called through scripts.
Protected concurrently AP and SP distribution handlers.
Slightly improved HealOvertimeHandler performance.
Fixed Duey not propagating equipment level and experience when transfering items.
Buyback now has a short grace period, granting the returning player time for decision making (players won't die right away, rather sticks at 1HP).
Reviewed item monitor task not properly protected concurrently.
Fixed some issues with ropes on some Kampung Village maps.
Fixed "maxhpmp" command allowing to pass negative values.

src/net/server/audit/locks/active/TrackerReadLock.java

@@ -0,0 +1,169 @@
+/*
+    This file is part of the HeavenMS MapleStory Server
+    Copyleft (L) 2016 - 2018 RonanLana
+
+    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 net.server.audit.locks.active;
+
+import constants.ServerConstants;
+import java.text.DateFormat;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+import java.util.TimeZone;
+import java.util.concurrent.atomic.AtomicInteger;
+import java.util.concurrent.locks.ReentrantReadWriteLock;
+import java.util.concurrent.locks.Lock;
+import java.util.concurrent.locks.ReentrantLock;
+import java.util.concurrent.ScheduledFuture;
+import server.TimerManager;
+
+import net.server.audit.ThreadTracker;
+import net.server.audit.locks.MonitoredLockType;
+import net.server.audit.locks.MonitoredReadLock;
+import net.server.audit.locks.MonitoredReentrantReadWriteLock;
+import net.server.audit.locks.empty.EmptyReadLock;
+
+import tools.FilePrinter;
+
+/**
+ *
+ * @author RonanLana
+ */
+public class TrackerReadLock extends ReentrantReadWriteLock.ReadLock implements MonitoredReadLock {
+    private ScheduledFuture<?> timeoutSchedule = null;
+    private StackTraceElement[] deadlockedState = null;
+    private final MonitoredLockType id;
+    private final int hashcode;
+    private final Lock state = new ReentrantLock(true);
+    private final AtomicInteger reentrantCount = new AtomicInteger(0);
+    
+    public TrackerReadLock(MonitoredReentrantReadWriteLock lock) {
+        super(lock);
+        this.id = lock.id;
+        hashcode = this.hashCode();
+    }
+    
+    @Override
+    public void lock() {
+        if(ServerConstants.USE_THREAD_TRACKER) {
+            if(deadlockedState != null) {
+                DateFormat dateFormat = new SimpleDateFormat("dd-MM-yyyy HH:mm:ss");
+                dateFormat.setTimeZone(TimeZone.getTimeZone(ServerConstants.TIMEZONE));
+
+                //FilePrinter.printError(FilePrinter.DEADLOCK_ERROR, "[CRITICAL] " + dateFormat.format(new Date()) + " Deadlock occurred when trying to use the '" + id.name() + "' lock resources:\r\n" + printStackTrace(deadlockedState) + "\r\n\r\n");
+                ThreadTracker.getInstance().accessThreadTracker(true, true, id, hashcode);
+                deadlockedState = null;
+            }
+
+            registerLocking();
+        }
+        
+        super.lock();
+    }
+    
+    @Override
+    public void unlock() {
+        if(ServerConstants.USE_THREAD_TRACKER) {
+            unregisterLocking();
+        }
+        
+        super.unlock();
+    }
+    
+    @Override
+    public boolean tryLock() {
+        if(super.tryLock()) {
+            if(ServerConstants.USE_THREAD_TRACKER) {
+                if(deadlockedState != null) {
+                    //FilePrinter.printError(FilePrinter.DEADLOCK_ERROR, "Deadlock occurred when trying to use the '" + id.name() + "' lock resources:\r\n" + printStackTrace(deadlockedState) + "\r\n\r\n");
+                    ThreadTracker.getInstance().accessThreadTracker(true, true, id, hashcode);
+                    deadlockedState = null;
+                }
+
+                registerLocking();
+            }
+            return true;
+        } else {
+            return false;
+        }
+    }
+    
+    private void registerLocking() {
+        state.lock();
+        try {
+            ThreadTracker.getInstance().accessThreadTracker(false, true, id, hashcode);
+        
+            if(reentrantCount.incrementAndGet() == 1) {
+                final Thread t = Thread.currentThread();
+                timeoutSchedule = TimerManager.getInstance().schedule(new Runnable() {
+                    @Override
+                    public void run() {
+                        issueDeadlock(t);
+                    }
+                }, ServerConstants.LOCK_MONITOR_TIME);
+            }
+        } finally {
+            state.unlock();
+        }
+    }
+    
+    private void unregisterLocking() {
+        state.lock();
+        try {
+            if(reentrantCount.decrementAndGet() == 0) {
+                if(timeoutSchedule != null) {
+                    timeoutSchedule.cancel(false);
+                    timeoutSchedule = null;
+                }
+            }
+            
+            ThreadTracker.getInstance().accessThreadTracker(false, false, id, hashcode);
+        } finally {
+            state.unlock();
+        }
+    }
+    
+    private void issueDeadlock(Thread t) {
+        deadlockedState = t.getStackTrace();
+        //super.unlock();
+    }
+    
+    private static String printStackTrace(StackTraceElement[] list) {
+        String s = "";
+        for(int i = 0; i < list.length; i++) {
+            s += ("    " + list[i].toString() + "\r\n");
+        }
+        
+        return s;
+    }
+    
+    @Override
+    public MonitoredReadLock dispose() {
+        state.lock();
+        try {
+            if(timeoutSchedule != null) {
+                timeoutSchedule.cancel(false);
+                timeoutSchedule = null;
+            }
+        } finally {
+            state.unlock();
+        }
+        
+        //unlock();
+        return new EmptyReadLock();
+    }
+}