Converted Observatory metrics-page element

runtime/observatory/lib/src/models/repositories/metric.dart

+// Copyright (c) 2016, 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 models;
+
+enum MetricBufferSize {
+  n10samples,
+  n100samples,
+  n1000samples
+}
+
+enum MetricSamplingRate {
+  off,
+  e100ms,
+  e1s,
+  e2s,
+  e4s,
+  e8s
+}
+
+abstract class MetricRepository {
+  Future<Iterable<Metric>> list(IsolateRef isolate);
+  void setSamplingRate(IsolateRef isolate, Metric metric, MetricSamplingRate r);
+  MetricSamplingRate getSamplingRate(IsolateRef isolate, Metric metric);
+  void setBufferSize(IsolateRef isolate, Metric metric, MetricBufferSize r);
+  MetricBufferSize getBufferSize(IsolateRef isolate, Metric metric);
+  Iterable<MetricSample> getSamples(IsolateRef isolate, Metric metric);
+  double getMinValue(IsolateRef isolate, Metric metric);
+  double getMaxValue(IsolateRef isolate, Metric metric);
+}