1 // Copyright 2014 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 COMPONENTS_RAPPOR_RAPPOR_SERVICE_H_
6 #define COMPONENTS_RAPPOR_RAPPOR_SERVICE_H_
11 #include "base/basictypes.h"
12 #include "base/macros.h"
13 #include "base/memory/scoped_ptr.h"
14 #include "base/timer/timer.h"
16 class PrefRegistrySimple;
20 class URLRequestContextGetter;
28 struct RapporParameters;
30 // The type of data stored in a metric.
32 // For sampling the eTLD+1 of a URL.
33 ETLD_PLUS_ONE_RAPPOR_TYPE = 0,
37 // This class provides an interface for recording samples for rappor metrics,
38 // and periodically generates and uploads reports based on the collected data.
42 virtual ~RapporService();
44 // Starts the periodic generation of reports and upload attempts.
45 void Start(PrefService* pref_service,
46 net::URLRequestContextGetter* context,
47 bool metrics_enabled);
49 // Records a sample of the rappor metric specified by |metric_name|.
50 // Creates and initializes the metric, if it doesn't yet exist.
51 void RecordSample(const std::string& metric_name,
53 const std::string& sample);
55 // Sets the cohort value. For use by tests only.
56 void SetCohortForTesting(uint32_t cohort) { cohort_ = cohort; }
58 // Sets the secret value. For use by tests only.
59 void SetSecretForTesting(const std::string& secret) { secret_ = secret; }
61 // Registers the names of all of the preferences used by RapporService in the
62 // provided PrefRegistry. This should be called before calling Start().
63 static void RegisterPrefs(PrefRegistrySimple* registry);
66 // Logs all of the collected metrics to the reports proto message and clears
67 // the internal map. Exposed for tests. Returns true if any metrics were
69 bool ExportMetrics(RapporReports* reports);
71 // Records a sample of the rappor metric specified by |parameters|.
72 // Creates and initializes the metric, if it doesn't yet exist.
74 void RecordSampleInternal(const std::string& metric_name,
75 const RapporParameters& parameters,
76 const std::string& sample);
79 // Check if the service has been started successfully.
80 bool IsInitialized() const;
82 // Retrieves the cohort number this client was assigned to, generating it if
83 // doesn't already exist. The cohort should be persistent.
84 void LoadCohort(PrefService* pref_service);
86 // Retrieves the value for secret_ from preferences, generating it if doesn't
87 // already exist. The secret should be persistent, so that additional bits
88 // from the client do not get exposed over time.
89 void LoadSecret(PrefService* pref_service);
91 // Called whenever the logging interval elapses to generate a new log of
92 // reports and pass it to the uploader.
95 // Finds a metric in the metrics_map_, creating it if it doesn't already
97 RapporMetric* LookUpMetric(const std::string& metric_name,
98 const RapporParameters& parameters);
100 // Client-side secret used to generate fake bits.
103 // The cohort this client is assigned to. -1 is uninitialized.
106 // Timer which schedules calls to OnLogInterval().
107 base::OneShotTimer<RapporService> log_rotation_timer_;
109 // A private LogUploader instance for sending reports to the server.
110 scoped_ptr<LogUploader> uploader_;
112 // We keep all registered metrics in a map, from name to metric.
113 // The map owns the metrics it contains.
114 std::map<std::string, RapporMetric*> metrics_map_;
116 DISALLOW_COPY_AND_ASSIGN(RapporService);
119 } // namespace rappor
121 #endif // COMPONENTS_RAPPOR_RAPPOR_SERVICE_H_