update socket codes

lib/communicator.dart

@@ -19,7 +19,7 @@ abstract class Communicator
   {
     if(!_instanceGenerator.containsKey(type))
     {
-      throw Exception('Must set protobuf packet creator before use it.');
+      throw Exception('Must set protobuf packet creator before use it. Type: ${(T).toString()}');
     }
     return _instanceGenerator[type] as T Function(List<int>);
   }

lib/socket/protobuf_client.dart

@@ -14,16 +14,20 @@ class ProtobufClient extends Communicator
   final int _headerSize = 4;
   final Socket _socket;
   int? _length = null;
+  bool _isAlive = false;
   late List<int> _arrivedData = [];
   List<void Function(ProtobufClient)> _onDisconnectListenerList = [];
 
   
-  ProtobufClient(this._socket)
+  ProtobufClient(this._socket, Map<String, GeneratedMessage Function(List<int>)> parserMap)
   {
     print('Connected New Client');
-    super.initialize({
-      (TemplateData).toString() : TemplateData.fromBuffer
+    _isAlive = true;
+    parserMap.addAll({
+      (TemplateData).toString() : TemplateData.fromBuffer,
+      (HeartBeat).toString() : HeartBeat.fromBuffer
     });
+    super.initialize(parserMap);
     addListener(onHeartBeat);
     _socket.listen(onData, onError: onError)
             .asFuture().then(onDisconnected);

lib/socket/protobuf_server.dart

@@ -3,15 +3,16 @@
 import 'dart:io';
 import 'package:dart_framework/socket/packets/message_common.pb.dart';
 import 'package:dart_framework/socket/protobuf_client.dart';
+import 'package:dart_framework/utils/system_util.dart';
 
 abstract class ProtobufServer
 {
-  late ServerSocket _server;
   List<ProtobufClient> _clientList = [];
+  late ServerSocket _server;
   final String _host;
   final int _port;
   final ProtobufClient Function(Socket) _createNewClient;
-
+  
   ProtobufServer(this._host, this._port, this._createNewClient);
   
   Future start() async
@@ -24,6 +25,7 @@ abstract class ProtobufServer
       _clientList.add(client);
       onClientConnected(client);
     });
+    return simpleFuture;
   }
 
   //implement in child