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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 | 10 |
10 #include "base/rand_util.h" | 11 #include "base/rand_util.h" |
11 | 12 |
12 namespace rappor { | 13 namespace rappor { |
13 | 14 |
14 namespace internal { | 15 namespace internal { |
15 | 16 |
16 Sampler::Sampler() {} | 17 Sampler::Sampler() {} |
17 | 18 |
18 Sampler::~Sampler() {} | 19 Sampler::~Sampler() {} |
19 | 20 |
20 void Sampler::AddSample(const std::string& metric_name, | 21 void Sampler::AddSample(const std::string& metric_name, |
21 scoped_ptr<Sample> sample) { | 22 scoped_ptr<Sample> sample) { |
22 ++sample_counts_[metric_name]; | 23 ++sample_counts_[metric_name]; |
23 // 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 |
24 // sample has equal probability of being reported. | 25 // sample has equal probability of being reported. |
25 if (base::RandGenerator(sample_counts_[metric_name]) == 0) | 26 if (base::RandGenerator(sample_counts_[metric_name]) == 0) |
26 samples_.set(metric_name, sample.Pass()); | 27 samples_.set(metric_name, std::move(sample)); |
27 } | 28 } |
28 | 29 |
29 void Sampler::ExportMetrics(const std::string& secret, RapporReports* reports) { | 30 void Sampler::ExportMetrics(const std::string& secret, RapporReports* reports) { |
30 for (const auto& kv : samples_) { | 31 for (const auto& kv : samples_) { |
31 kv.second->ExportMetrics(secret, kv.first, reports); | 32 kv.second->ExportMetrics(secret, kv.first, reports); |
32 } | 33 } |
33 samples_.clear(); | 34 samples_.clear(); |
34 sample_counts_.clear(); | 35 sample_counts_.clear(); |
35 } | 36 } |
36 | 37 |
37 } // namespace internal | 38 } // namespace internal |
38 | 39 |
39 } // namespace rappor | 40 } // namespace rappor |
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