components/metrics/metrics_service_client.h

   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.
   4
   5 #ifndef COMPONENTS_METRICS_METRICS_SERVICE_CLIENT_H_
   6 #define COMPONENTS_METRICS_METRICS_SERVICE_CLIENT_H_
   7
   8 #include <stdint.h>
   9 #include <string>
  10
  11 #include "base/basictypes.h"
  12 #include "base/callback_forward.h"
  13 #include "base/memory/scoped_ptr.h"
  14 #include "base/strings/string16.h"
  15 #include "components/metrics/proto/system_profile.pb.h"
  16
  17 namespace metrics {
  18
  19 class MetricsLogUploader;
  20
  21 // An abstraction of operations that depend on the embedder's (e.g. Chrome)
  22 // environment.
  23 class MetricsServiceClient {
  24  public:
  25   virtual ~MetricsServiceClient() {}
  26
  27   // Registers the client id with other services (e.g. crash reporting), called
  28   // when metrics recording gets enabled.
  29   virtual void SetMetricsClientId(const std::string& client_id) = 0;
  30
  31   // Whether there's an "off the record" (aka "Incognito") session active.
  32   virtual bool IsOffTheRecordSessionActive() = 0;
  33
  34   // Returns the product value to use in uploaded reports, which will be used to
  35   // set the ChromeUserMetricsExtension.product field. See comments on that
  36   // field on why it's an int32 rather than an enum.
  37   virtual int32_t GetProduct() = 0;
  38
  39   // Returns the current application locale (e.g. "en-US").
  40   virtual std::string GetApplicationLocale() = 0;
  41
  42   // Retrieves the brand code string associated with the install, returning
  43   // false if no brand code is available.
  44   virtual bool GetBrand(std::string* brand_code) = 0;
  45
  46   // Returns the release channel (e.g. stable, beta, etc) of the application.
  47   virtual SystemProfileProto::Channel GetChannel() = 0;
  48
  49   // Returns the version of the application as a string.
  50   virtual std::string GetVersionString() = 0;
  51
  52   // Called by the metrics service when a log has been uploaded.
  53   virtual void OnLogUploadComplete() = 0;
  54
  55   // Starts gathering metrics, calling |done_callback| when initial metrics
  56   // gathering is complete.
  57   virtual void StartGatheringMetrics(const base::Closure& done_callback) = 0;
  58
  59   // Called prior to a metrics log being closed, allowing the client to collect
  60   // extra histograms that will go in that log. Asynchronous API - the client
  61   // implementation should call |done_callback| when complete.
  62   virtual void CollectFinalMetrics(const base::Closure& done_callback) = 0;
  63
  64   // Creates a MetricsLogUploader with the specified parameters (see comments on
  65   // MetricsLogUploader for details).
  66   virtual scoped_ptr<MetricsLogUploader> CreateUploader(
  67       const base::Callback<void(int)>& on_upload_complete) = 0;
  68
  69   // Returns the name of a key under HKEY_CURRENT_USER that can be used to store
  70   // backups of metrics data. Unused except on Windows.
  71   virtual base::string16 GetRegistryBackupKey();
  72 };
  73
  74 }  // namespace metrics
  75
  76 #endif  // COMPONENTS_METRICS_METRICS_SERVICE_CLIENT_H_