components/metrics/profiler/tracking_synchronizer_observer.h

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef COMPONENTS_METRICS_PROFILER_TRACKING_SYNCHRONIZER_OBSERVER_H_
   6 #define COMPONENTS_METRICS_PROFILER_TRACKING_SYNCHRONIZER_OBSERVER_H_
   7
   8 namespace tracked_objects {
   9 struct ProcessDataSnapshot;
  10 }
  11
  12 namespace metrics {
  13
  14 // Observer for notifications from the TrackingSynchronizer class.
  15 class TrackingSynchronizerObserver {
  16  public:
  17   // Received |profiler_data| from a single process of |process_type|.
  18   // The observer should assume there might be more data coming until
  19   // |FinishedReceivingData()| is called.
  20   virtual void ReceivedProfilerData(
  21       const tracked_objects::ProcessDataSnapshot& profiler_data,
  22       int process_type) = 0;
  23
  24   // The observer should not expect any more calls to |ReceivedProfilerData()|
  25   // (without re-registering).  This is sent either when data from all processes
  26   // has been gathered, or when the request times out.
  27   virtual void FinishedReceivingProfilerData() {}
  28
  29  protected:
  30   TrackingSynchronizerObserver() {}
  31   virtual ~TrackingSynchronizerObserver() {}
  32
  33  private:
  34   DISALLOW_COPY_AND_ASSIGN(TrackingSynchronizerObserver);
  35 };
  36
  37 }  // namespace metrics
  38
  39 #endif  // COMPONENTS_METRICS_PROFILER_TRACKING_SYNCHRONIZER_OBSERVER_H_