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// Copyright (c) 2010 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_RENDERER_RENDERER_HISTOGRAM_SNAPSHOTS_H_
#define CHROME_RENDERER_RENDERER_HISTOGRAM_SNAPSHOTS_H_
#pragma once
#include <map>
#include <string>
#include <vector>
#include "base/basictypes.h"
#include "base/metrics/histogram.h"
#include "base/process.h"
#include "base/task.h"
#include "chrome/common/metrics_helpers.h"
#include "content/renderer/render_process_observer.h"
class RendererHistogramSnapshots : public HistogramSender,
public RenderProcessObserver {
public:
RendererHistogramSnapshots();
~RendererHistogramSnapshots();
// Send the histogram data.
void SendHistograms(int sequence_number);
private:
// RenderProcessObserver implementation.
virtual bool OnControlMessageReceived(const IPC::Message& message);
void OnGetRendererHistograms(int sequence_number);
// Maintain a map of histogram names to the sample stats we've sent.
typedef std::map<std::string, base::Histogram::SampleSet> LoggedSampleMap;
typedef std::vector<std::string> HistogramPickledList;
// Extract snapshot data and then send it off the the Browser process.
// Send only a delta to what we have already sent.
void UploadAllHistrograms(int sequence_number);
ScopedRunnableMethodFactory<RendererHistogramSnapshots>
renderer_histogram_snapshots_factory_;
// HistogramSender interface (override) methods.
virtual void TransmitHistogramDelta(
const base::Histogram& histogram,
const base::Histogram::SampleSet& snapshot);
virtual void InconsistencyDetected(int problem);
virtual void UniqueInconsistencyDetected(int problem);
virtual void SnapshotProblemResolved(int amount);
// Collection of histograms to send to the browser.
HistogramPickledList pickled_histograms_;
DISALLOW_COPY_AND_ASSIGN(RendererHistogramSnapshots);
};
#endif // CHROME_RENDERER_RENDERER_HISTOGRAM_SNAPSHOTS_H_
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