package org.moparscape.msc.gs.core;
import java.io.IOException;
import java.io.OutputStream;
import java.io.PrintStream;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.util.Iterator;
import java.util.TreeMap;
import org.apache.mina.common.IoSession;
import org.moparscape.msc.gs.Instance;
import org.moparscape.msc.gs.config.Config;
import org.moparscape.msc.gs.connection.PacketQueue;
import org.moparscape.msc.gs.connection.RSCPacket;
import org.moparscape.msc.gs.connection.filter.IPBanManager;
import org.moparscape.msc.gs.event.DelayedEvent;
import org.moparscape.msc.gs.model.Player;
import org.moparscape.msc.gs.model.World;
import org.moparscape.msc.gs.model.landscape.ActiveTile;
import org.moparscape.msc.gs.model.snapshot.Snapshot;
import org.moparscape.msc.gs.phandler.PacketHandler;
import org.moparscape.msc.gs.phandler.PacketHandlerDef;
import org.moparscape.msc.gs.util.Logger;
/**
* The central motor of the game. This class is responsible for the primary
* operation of the entire game.
*/
public final class GameEngine extends Thread {
/**
* World instance
*/
private static final World world = Instance.getWorld();
/**
* Responsible for updating all connected clients
*/
private ClientUpdater clientUpdater = new ClientUpdater();
/**
* Handles delayed events rather than events to be ran every iteration
*/
private DelayedEventHandler eventHandler = new DelayedEventHandler();
/**
* When the update loop was last ran, required for throttle
*/
private long lastSentClientUpdate = GameEngine.getTime();
private long lastSentClientUpdateFast = GameEngine.getTime();
private long lastCleanedChatlogs = 0;
private int lastCleanedChatlogsOutput = 0;
/**
* The mapping of packet IDs to their handler
*/
private TreeMap<Integer, PacketHandler> packetHandlers = new TreeMap<Integer, PacketHandler>();
/**
* The packet queue to be processed
*/
private PacketQueue<RSCPacket> packetQueue;
/**
* Whether the engine's thread is running
*/
private boolean running = true;
private static volatile long time = 0;
/**
* Only use this method when you need the actual time.
*/
public static long getTimestamp() {
return System.currentTimeMillis();
}
/**
* Use this instead of System.currentTimeIllis when getting elapsed time, as
* each call does a system call, and potentially a hardware poll...<br>
* Also, you don't generally need the time to be updated more often than
* each part in the main loop.
*
* @return The current time.
*/
public static long getTime() {
return time;
}
/**
* Constructs a new game engine with an empty packet queue.
*/
public GameEngine() {
packetQueue = new PacketQueue<RSCPacket>();
try {
loadPacketHandlers();
} catch (Exception e) {
e.printStackTrace();
System.exit(0);
}
redirectSystemStreams();
}
public void emptyWorld() {
for (Player p : world.getPlayers()) {
p.save();
p.getActionSender().sendLogout();
}
Instance.getServer().getLoginConnector().getActionSender()
.saveProfiles();
}
/**
* Ban dummy packet flood private Map<InetAddress, Long> clients; private
* Map<InetAddress, Integer> counts; private Map<InetAddress, Integer>
* written; public void flagSession(IoSession session) { InetAddress addr =
* getAddress(session); String ip = addr.toString(); ip =
* ip.replaceAll("/",""); long now = System.currentTimeMillis(); int c = 0;
* if(counts.containsKey(addr) && clients.containsKey(addr)) { try { c =
* counts.get(addr); } catch(Exception e) { Logging.debug("Error: " + e); }
* if(c >= 10) { if(!written.containsKey(addr)) { try {
* Logging.debug("Dummy packet flooder IP: " + ip); BufferedWriter bf2 = new
* BufferedWriter(new FileWriter("dummy.log", true));
* bf2.write("sudo /sbin/route add " + addr.getHostAddress() +
* " gw 127.0.0.1"); bf2.newLine(); bf2.close(); written.put(addr, 1); }
* catch(Exception e) { System.err.println(e);} } } } if
* (clients.containsKey(addr)) { long lastConnTime = clients.get(addr); if
* (now - lastConnTime < 2000) { if(!counts.containsKey(addr)) {
* counts.put(addr, 0); } else c = counts.get(addr) + 1; counts.put(addr,
* c); } else { clients.put(addr, now); } } else { clients.put(addr, now); }
* }
*
* private InetAddress getAddress(IoSession io) { return
* ((InetSocketAddress) io.getRemoteAddress()).getAddress(); }
*/
/**
* Returns the current packet queue.
*
* @return A <code>PacketQueue</code>
*/
public PacketQueue<RSCPacket> getPacketQueue() {
return packetQueue;
}
public void kill() {
Logger.println("Terminating GameEngine");
running = false;
}
/**
* Loads the packet handling classes from the persistence manager.
*
* @throws Exception
*/
private void loadPacketHandlers() throws Exception {
PacketHandlerDef[] handlerDefs = Instance.dataStore()
.loadPacketHandlerDefs();
for (PacketHandlerDef handlerDef : handlerDefs) {
try {
String className = handlerDef.getClassName();
Class<?> c = Class.forName(className);
if (c != null) {
PacketHandler handler = (PacketHandler) c.newInstance();
for (int packetID : handlerDef.getAssociatedPackets()) {
packetHandlers.put(packetID, handler);
}
}
} catch (Exception e) {
Logger.error(e);
}
}
}
private void processClients() {
clientUpdater.sendQueuedPackets();
long now = GameEngine.getTime();
if (now - lastSentClientUpdate >= 600) {
lastSentClientUpdate = now;
clientUpdater.doMajor();
}
if (now - lastSentClientUpdateFast >= 104) {
lastSentClientUpdateFast = now;
clientUpdater.doMinor();
}
}
private long lastEventTick;
private void processEvents() {
if (getTime() - lastEventTick >= 100) {
eventHandler.doEvents();
lastEventTick = getTime();
}
}
public DelayedEventHandler getEventHandler() {
return eventHandler;
}
/**
* Redirects system err
*/
private static void redirectSystemStreams() {
OutputStream out = new OutputStream() {
@Override
public void write(int b) throws IOException {
String line = String.valueOf((char) b);
Logger.systemerr(line);
}
@Override
public void write(byte[] b, int off, int len) throws IOException {
String line = new String(b, off, len);
Logger.systemerr(line);
}
@Override
public void write(byte[] b) throws IOException {
write(b, 0, b.length);
}
};
System.setErr(new PrintStream(out, true));
}
private void processIncomingPackets() {
for (RSCPacket p : packetQueue.getPackets()) {
IoSession session = p.getSession();
Player player = (Player) session.getAttachment();
if (player.getUsername() == null && p.getID() != 32
&& p.getID() != 77 && p.getID() != 0) {
final String ip = player.getCurrentIP();
IPBanManager.throttle(ip);
continue;
}
PacketHandler handler = packetHandlers.get(p.getID());
player.ping();
if (handler != null) {
try {
handler.handlePacket(p, session);
try {
if (p.getID() != 5) {
// String s = "[PACKET] " +
// session.getRemoteAddress().toString().replace("/",
// "") + " : " + p.getID()+
// " ["+handler.getClass().toString()+"]" + " : "+
// player.getUsername() + " : ";
// for(Byte b : p.getData())
// s += b;
// Logger.println(s);
}
} catch (Exception e) {
e.printStackTrace();
}
} catch (Exception e) {
String s;
StringWriter sw = new StringWriter();
PrintWriter pw = new PrintWriter(sw, true);
e.printStackTrace(pw);
pw.flush();
sw.flush();
s = sw.toString();
Logger.error("Exception with p[" + p.getID() + "] from "
+ player.getUsername() + " ["
+ player.getCurrentIP() + "]: " + s);
player.getActionSender().sendLogout();
player.destroy(false);
}
} else {
Logger.error("Unhandled packet from " + player.getCurrentIP()
+ ": " + p.getID() + "len: " + p.getLength());
}
}
}
private void processLoginServer() {
LoginConnector connector = Instance.getServer().getLoginConnector();
if (connector != null) {
connector.processIncomingPackets();
connector.sendQueuedPackets();
}
}
/**
* The thread execution process.
*/
public void run() {
Logger.println("GameEngine now running");
time = System.nanoTime() / 1000000000;
eventHandler
.add(new DelayedEvent(null, Config.GARBAGE_COLLECT_INTERVAL) { // Ran
// every
// 50*2
// minutes
@Override
public void run() {
new Thread(new Runnable() {
public void run() {
garbageCollect();
}
}).start();
}
});
eventHandler.add(new DelayedEvent(null, Config.SAVE_INTERVAL) {
public void run() {
long now = GameEngine.getTime();
for (Player p : world.getPlayers()) {
if (now - p.getLastSaveTime() >= Config.SAVE_INTERVAL) {
p.save();
p.setLastSaveTime(now);
}
}
Instance.getServer().getLoginConnector().getActionSender()
.saveProfiles();
}
});
while (running) {
try {
Thread.sleep(50);
} catch (InterruptedException ie) {
}
long deltaTime = updateTime();
processLoginServer();
if ((deltaTime = getDeltaTime()) >= 1000)
Logger.println("processLoginServer is taking longer than it should, exactly "
+ deltaTime + "ms");
processIncomingPackets();
if ((deltaTime = getDeltaTime()) >= 1000)
Logger.println("processIncomingPackets is taking longer than it should, exactly "
+ deltaTime + "ms");
processEvents();
if ((deltaTime = getDeltaTime()) >= 1000)
Logger.println("processEvents is taking longer than it should, exactly "
+ deltaTime + "ms");
processClients();
if ((deltaTime = getDeltaTime()) >= 1000)
Logger.println("processClients is taking longer than it should, exactly "
+ deltaTime + "ms");
cleanSnapshotDeque();
if ((deltaTime = getDeltaTime()) >= 1000)
Logger.println("processSnapshotDeque is taking longer than it should, exactly "
+ deltaTime + "ms");
}
}
public long getDeltaTime() {
long t1 = time;
return updateTime() - t1;
}
private long updateTime() {
return time = System.nanoTime() / 1000000;
}
/**
* Cleans snapshots of entries over 60 seconds old (executed every second)
*/
private void cleanSnapshotDeque() {
long curTime = GameEngine.getTimestamp(); // We need to compare
// timestamps
if (curTime - lastCleanedChatlogs > 1000) { // Every second
lastCleanedChatlogs = curTime;
lastCleanedChatlogsOutput++;
if (lastCleanedChatlogsOutput > 60 * 5) {
Logger.println("----------------------------------------------");
Logger.println(world.getSnapshots().size() + " items on deque");
}
Iterator<Snapshot> i = world.getSnapshots().descendingIterator();
Snapshot s = null;
while (i.hasNext()) {
s = i.next();
if (curTime - s.getTimestamp() > 60000) {
i.remove();
s = null;
} else {
s = null;
}
}
i = null;
if (lastCleanedChatlogsOutput > 60 * 5) {
Logger.println(world.getSnapshots().size()
+ " items on deque AFTER CLEANUP");
Logger.println("----------------------------------------------");
lastCleanedChatlogsOutput = 0;
}
}
}
/**
* Cleans garbage (Tilecleanup)
*/
private synchronized void garbageCollect() {
long startTime = getTime();
int curMemory = (int) (Runtime.getRuntime().totalMemory() - Runtime
.getRuntime().freeMemory()) / 1000;
for (int i = 0; i < Instance.getWorld().tiles.length; i++) {
for (int in = 0; in < Instance.getWorld().tiles[i].length; in++) {
ActiveTile tile = Instance.getWorld().tiles[i][in];
if (tile != null) {
if (!tile.hasGameObject() && !tile.hasItems()
&& !tile.hasNpcs() && !tile.hasPlayers()) {
Instance.getWorld().tiles[i][in] = null;
}
}
}
}
Runtime.getRuntime().gc();
int newMemory = (int) (Runtime.getRuntime().totalMemory() - Runtime
.getRuntime().freeMemory()) / 1000;
Logger.println("GARBAGE COLLECT | Executing Memory Cleanup");
Logger.println("GARBAGE COLLECT | Memory before: " + curMemory + "kb"
+ " Memory after: " + newMemory + " (Freed: "
+ (curMemory - newMemory) + "kb)");
Logger.println("GARBAGE COLLECT | Cleanup took "
+ (updateTime() - startTime) + "ms");
}
}