Remove VM Stats

runtime/bin/vmstats/models.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.
-
-part of dart.vmstats;
-
-// Base class of model that reports changes to registered listeners.
-abstract class ObservableModel {
-  List<ModelListener> _listeners = [];
-
-  void addListener(Function onUpdate, Function onFailure) {
-    _listeners.add(new ModelListener(onUpdate, onFailure));
-  }
-
-  void removeListener(Function onUpdate) {
-    Iterator<ModelListener> iterator = _listeners.iterator;
-    while (iterator.moveNext()) {
-      if (iterator.current._onUpdate == onUpdate) {
-        _listeners.remove(iterator.current);
-        return;
-      }
-    }
-  }
-
-  void notifySuccess() {
-   _listeners.forEach((listener) => listener.changed(this));
-  }
-
-  void notifyFailure() {
-    _listeners.forEach((listener) => listener.failed());
-  }
-}
-
-// Model of a set of listener functions to call when a model changes.
-class ModelListener {
-  Function _onUpdate;
-  Function _onFailure;
-
-  ModelListener(this._onUpdate, this._onFailure) {}
-
-  void changed(IsolateListModel model) => Function.apply(_onUpdate, [model]);
-  void failed() => Function.apply(_onFailure, []);
-}
-
-
-// Model of the current running isolates.
-class IsolateListModel extends ObservableModel {
-  List<Isolate> _isolates = [];
-
-  void update() {
-    HttpRequest.getString('/isolates').then(
-        (Map response) => _onUpdate(JSON.parse(response)),
-        onError: (e) => notifyFailure());
-  }
-
-  void _onUpdate(Map isolateMap) {
-    _isolates = [];
-    List list = isolateMap['isolates'];
-    for (int i = 0; i < list.length; i++) {
-      _isolates.add(new Isolate(list[i]));
-    }
-    notifySuccess();
-  }
-
-  String toString() {
-    return _isolates.join(', ');
-  }
-
-  // List delegate method subset.
-  Isolate elementAt(int index) => _isolates[index];
-
-  void forEach(void f(Isolate element)) => _isolates.forEach(f);
-
-  bool isEmpty() => _isolates.isEmpty;
-
-  Iterator<Isolate> get iterator => _isolates.iterator;
-
-  int get length => _isolates.length;
-
-  Isolate operator[](int index) => _isolates[index];
-}
-
-
-// Model of a single isolate.
-class Isolate {
-  final String handle;
-  final String name;
-  final int port;
-  final int startTime;
-  final int stackLimit;
-  final Space newSpace;
-  final Space oldSpace;
-
-  // Create an isolate from a map describing an isolate in the observed VM.
-  Isolate(Map raw):
-      handle = raw['handle'],
-      name = raw['name'],
-      port = raw['port'],
-      startTime = raw['starttime'],
-      stackLimit = raw['stacklimit'],
-      newSpace = new Space(raw['newspace']),
-      oldSpace = new Space(raw['oldspace']) {}
-
-  String toString() {
-    return '$name: ${newSpace.used + oldSpace.used}K';
-  }
-}
-
-// Model of a memory space.
-class Space {
-  final int used;
-  final int capacity;
-
-  Space(Map raw): used = raw['used'], capacity = raw['capacity'] {}
-
-  String toString() {
-    return 'used: $used capacity: $capacity';
-  }
-}