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.
5 #ifndef NET_DISK_CACHE_STATS_HISTOGRAM_H_
6 #define NET_DISK_CACHE_STATS_HISTOGRAM_H_
10 #include "base/memory/scoped_ptr.h"
11 #include "base/metrics/histogram.h"
15 class HistogramSamples;
19 namespace disk_cache {
23 // This class provides support for sending the disk cache size stats as a UMA
24 // histogram. We'll provide our own storage and management for the data, and a
25 // SampleVector with a copy of our data.
27 // Class derivation of Histogram "deprecated," and should not be copied, and
28 // may eventually go away.
30 class StatsHistogram : public base::Histogram {
32 StatsHistogram(const std::string& name,
35 const base::BucketRanges* ranges,
37 virtual ~StatsHistogram();
39 static void InitializeBucketRanges(const Stats* stats,
40 base::BucketRanges* ranges);
41 static StatsHistogram* FactoryGet(const std::string& name,
44 // Disables this histogram when the underlying Stats go away.
47 virtual scoped_ptr<base::HistogramSamples> SnapshotSamples() const OVERRIDE;
48 virtual int FindCorruption(
49 const base::HistogramSamples& samples) const OVERRIDE;
53 DISALLOW_COPY_AND_ASSIGN(StatsHistogram);
56 } // namespace disk_cache
58 #endif // NET_DISK_CACHE_STATS_HISTOGRAM_H_