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// Copyright (c) 2012 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 NET_DISK_CACHE_STATS_HISTOGRAM_H_
#define NET_DISK_CACHE_STATS_HISTOGRAM_H_
#include <string>
#include "base/memory/scoped_ptr.h"
#include "base/metrics/histogram.h"
namespace base {
class BucketRanges;
class HistogramSamples;
class SampleVector;
} // namespace base
namespace disk_cache {
class Stats;
// This class provides support for sending the disk cache size stats as a UMA
// histogram. We'll provide our own storage and management for the data, and a
// SampleVector with a copy of our data.
//
// Class derivation of Histogram "deprecated," and should not be copied, and
// may eventually go away.
//
class StatsHistogram : public base::Histogram {
public:
StatsHistogram(const std::string& name,
Sample minimum,
Sample maximum,
size_t bucket_count,
const base::BucketRanges* ranges,
const Stats* stats);
virtual ~StatsHistogram();
static void InitializeBucketRanges(const Stats* stats,
base::BucketRanges* ranges);
static StatsHistogram* FactoryGet(const std::string& name,
const Stats* stats);
virtual scoped_ptr<base::HistogramSamples> SnapshotSamples() const OVERRIDE;
virtual int FindCorruption(
const base::HistogramSamples& samples) const OVERRIDE;
private:
const Stats* stats_;
DISALLOW_COPY_AND_ASSIGN(StatsHistogram);
};
} // namespace disk_cache
#endif // NET_DISK_CACHE_STATS_HISTOGRAM_H_
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