WebSocket client for VM service

runtime/bin/vmservice/vmservice.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library vmservice;
 
 import 'dart:async';
 import 'dart:convert';
 import 'dart:isolate';
 import 'dart:typed_data';
 
+part 'client.dart';
 part 'constants.dart';
 part 'resources.dart';
 part 'running_isolate.dart';
 part 'running_isolates.dart';
-part 'service_request.dart';
-part 'service_request_router.dart';
+part 'message.dart';
+part 'message_router.dart';
 
-class VMService {
+class VMService extends MessageRouter {
   static VMService _instance;
+  final Set<Client> clients = new Set<Client>();
   RunningIsolates runningIsolates = new RunningIsolates();
   final RawReceivePort receivePort;
 
   void controlMessageHandler(int code, int port_id, SendPort sp, String name) {
     switch (code) {
       case Constants.ISOLATE_STARTUP_MESSAGE_ID:
         runningIsolates.isolateStartup(port_id, sp, name);
       break;
       case Constants.ISOLATE_SHUTDOWN_MESSAGE_ID:
         runningIsolates.isolateShutdown(port_id, sp);
       break;
     }
   }
 
+  void addClient(Client client) {
+    clients.add(client);
+  }
+
+  void removeClient(Client client) {
+    clients.remove(client);
+  }
+
   void messageHandler(message) {
     assert(message is List);
     assert(message.length == 4);
     if (message is List && message.length == 4) {
       controlMessageHandler(message[0], message[1], message[2], message[3]);
     }
   }
 
   VMService._internal() : receivePort = new RawReceivePort() {
     receivePort.handler = messageHandler;
   }
 
   factory VMService() {
     if (VMService._instance == null) {
       VMService._instance = new VMService._internal();
     }
     return _instance;
   }
+
+  void _clientCollection(Message message) {
+    var members = [];
+    var result = {};
+    clients.forEach((client) {
+      members.add(client.toJson());
+    });
+    result['type'] = 'ClientList';
+    result['members'] = members;
+    message.setResponse(JSON.encode(result));
+  }
+
+  Future route(Message message) {
+    if (message.completed) {
+      return message.future;
+    }
+    if ((message.path.length == 1) && (message.path[0] == 'clients')) {
+      _clientCollection(message);
+      return message.future;
+    }
+    return runningIsolates.route(message);
+  }
 }
 
 void sendServiceMessage(SendPort sp, ReceivePort rp, Object m)
     native "VMService_SendServiceMessage";