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1 // Copyright 2015 The Chromium Authors. All rights reserved. | 1 // Copyright 2015 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "components/rappor/sampler.h" | 5 #include "components/rappor/sampler.h" |
6 | 6 |
7 #include <map> | 7 #include <map> |
8 #include <string> | 8 #include <string> |
9 #include <utility> | 9 #include <utility> |
10 | 10 |
11 #include "base/rand_util.h" | 11 #include "base/rand_util.h" |
12 | 12 |
13 namespace rappor { | 13 namespace rappor { |
14 | 14 |
15 namespace internal { | 15 namespace internal { |
16 | 16 |
17 Sampler::Sampler() {} | 17 Sampler::Sampler() {} |
18 | 18 |
19 Sampler::~Sampler() {} | 19 Sampler::~Sampler() {} |
20 | 20 |
21 void Sampler::AddSample(const std::string& metric_name, | 21 void Sampler::AddSample(const std::string& metric_name, |
22 scoped_ptr<Sample> sample) { | 22 std::unique_ptr<Sample> sample) { |
23 ++sample_counts_[metric_name]; | 23 ++sample_counts_[metric_name]; |
24 // Replace the previous sample with a 1 in sample_count_ chance so that each | 24 // Replace the previous sample with a 1 in sample_count_ chance so that each |
25 // sample has equal probability of being reported. | 25 // sample has equal probability of being reported. |
26 if (base::RandGenerator(sample_counts_[metric_name]) == 0) | 26 if (base::RandGenerator(sample_counts_[metric_name]) == 0) |
27 samples_.set(metric_name, std::move(sample)); | 27 samples_.set(metric_name, std::move(sample)); |
28 } | 28 } |
29 | 29 |
30 void Sampler::ExportMetrics(const std::string& secret, RapporReports* reports) { | 30 void Sampler::ExportMetrics(const std::string& secret, RapporReports* reports) { |
31 for (const auto& kv : samples_) { | 31 for (const auto& kv : samples_) { |
32 kv.second->ExportMetrics(secret, kv.first, reports); | 32 kv.second->ExportMetrics(secret, kv.first, reports); |
33 } | 33 } |
34 samples_.clear(); | 34 samples_.clear(); |
35 sample_counts_.clear(); | 35 sample_counts_.clear(); |
36 } | 36 } |
37 | 37 |
38 } // namespace internal | 38 } // namespace internal |
39 | 39 |
40 } // namespace rappor | 40 } // namespace rappor |
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