Initial Netty implementation for networking

Split into 1 LoginServer and 1 ChannelServer per channel.

There is still a lot of cleanup and refactoring to be done.
Currently, the reliance on IoSession holding client state
is the most pressing issue to be addressed.

src/main/java/net/server/Server.java

@@ -37,6 +37,7 @@ import constants.net.OpcodeConstants;
 import constants.net.ServerConstants;
 import net.MapleServerHandler;
 import net.mina.MapleCodecFactory;
+import net.netty.LoginServer;
 import net.server.audit.ThreadTracker;
 import net.server.audit.locks.MonitoredLockType;
 import net.server.audit.locks.MonitoredReadLock;
@@ -106,6 +107,7 @@ public class Server {
     private static final List<Integer> activeCoupons = new LinkedList<>();
 
     private IoAcceptor acceptor;
+    private LoginServer loginServer;
     private List<Map<Integer, String>> channels = new LinkedList<>();
     private List<World> worlds = new ArrayList<>();
     private final Properties subnetInfo = new Properties();
@@ -906,17 +908,8 @@ public class Server {
             }
         }
 
-        IoBuffer.setUseDirectBuffer(false);     // join IO operations performed by lxconan
-        IoBuffer.setAllocator(new SimpleBufferAllocator());
-        acceptor = new NioSocketAcceptor();
-        acceptor.getFilterChain().addLast("codec", new ProtocolCodecFilter(new MapleCodecFactory()));
-        acceptor.getSessionConfig().setIdleTime(IdleStatus.BOTH_IDLE, 30);
-        acceptor.setHandler(new MapleServerHandler());
-        try {
-            acceptor.bind(new InetSocketAddress(8484));
-        } catch (IOException ex) {
-            ex.printStackTrace();
-        }
+        // acceptor = initAcceptor(8484);
+        loginServer = initLoginServer(8484);
 
         log.info("Listening on port 8484");
 
@@ -932,6 +925,28 @@ public class Server {
         }
     }
 
+    private LoginServer initLoginServer(int port) {
+        LoginServer loginServer = new LoginServer(port);
+        loginServer.start();
+        return loginServer;
+    }
+
+    private IoAcceptor initAcceptor(int port) {
+        IoBuffer.setUseDirectBuffer(false);     // join IO operations performed by lxconan
+        IoBuffer.setAllocator(new SimpleBufferAllocator());
+        acceptor = new NioSocketAcceptor();
+        acceptor.getFilterChain().addLast("codec", new ProtocolCodecFilter(new MapleCodecFactory()));
+        acceptor.getSessionConfig().setIdleTime(IdleStatus.BOTH_IDLE, 30);
+        acceptor.setHandler(new MapleServerHandler());
+        try {
+            acceptor.bind(new InetSocketAddress(port));
+        } catch (IOException ex) {
+            ex.printStackTrace();
+        }
+
+        return acceptor;
+    }
+
     private static void setAllLoggedOut(Connection con) throws SQLException {
         try (PreparedStatement ps = con.prepareStatement("UPDATE accounts SET loggedin = 0")) {
             ps.executeUpdate();

src/main/java/net/server/channel/Channel.java

@@ -26,6 +26,7 @@ import config.YamlConfig;
 import constants.game.GameConstants;
 import net.MapleServerHandler;
 import net.mina.MapleCodecFactory;
+import net.netty.ChannelServer;
 import net.server.PlayerStorage;
 import net.server.Server;
 import net.server.audit.LockCollector;
@@ -58,6 +59,7 @@ import tools.MaplePacketCreator;
 import tools.Pair;
 
 import java.io.File;
+import java.io.IOException;
 import java.net.InetSocketAddress;
 import java.util.*;
 import java.util.Map.Entry;
@@ -69,6 +71,7 @@ public final class Channel {
     private int port = 7575;
     private PlayerStorage players = new PlayerStorage();
     private int world, channel;
+    private ChannelServer channelServer;
     private IoAcceptor acceptor;
     private String ip, serverMessage;
     private MapleMapManager mapManager;
@@ -122,14 +125,8 @@ public final class Channel {
             port = 7575 + this.channel - 1;
             port += (world * 100);
             ip = YamlConfig.config.server.HOST + ":" + port;
-            IoBuffer.setUseDirectBuffer(false);
-            IoBuffer.setAllocator(new SimpleBufferAllocator());
-            acceptor = new NioSocketAcceptor();
-            acceptor.setHandler(new MapleServerHandler(world, channel));
-            acceptor.getSessionConfig().setIdleTime(IdleStatus.BOTH_IDLE, 30);
-            acceptor.getFilterChain().addLast("codec", new ProtocolCodecFilter(new MapleCodecFactory()));
-            acceptor.bind(new InetSocketAddress(port));
-            ((SocketSessionConfig) acceptor.getSessionConfig()).setTcpNoDelay(true);
+            // acceptor = initAcceptor();
+            channelServer = initServer(port, world, channel);
             expedType.addAll(Arrays.asList(MapleExpeditionType.values()));
             
             if (Server.getInstance().isOnline()) {  // postpone event loading to improve boot time... thanks Riizade, daronhudson for noticing slow startup times
@@ -156,6 +153,24 @@ public final class Channel {
             e.printStackTrace();
         }
     }
+
+    private IoAcceptor initAcceptor() throws IOException {
+        IoBuffer.setUseDirectBuffer(false);
+        IoBuffer.setAllocator(new SimpleBufferAllocator());
+        IoAcceptor acceptor = new NioSocketAcceptor();
+        acceptor.setHandler(new MapleServerHandler(world, channel));
+        acceptor.getSessionConfig().setIdleTime(IdleStatus.BOTH_IDLE, 30);
+        acceptor.getFilterChain().addLast("codec", new ProtocolCodecFilter(new MapleCodecFactory()));
+        acceptor.bind(new InetSocketAddress(port));
+        ((SocketSessionConfig) acceptor.getSessionConfig()).setTcpNoDelay(true);
+        return acceptor;
+    }
+
+    private ChannelServer initServer(int port, int world, int channel) {
+        this.channelServer = new ChannelServer(port, world, channel);
+        channelServer.start();
+        return channelServer;
+    }
     
     public synchronized void reloadEventScriptManager(){
         if (finishedShutdown) {