Create Ukm ReportingService implementation.

components/metrics/metrics_reporting_scheduler.h

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef COMPONENTS_METRICS_METRICS_REPORTING_SCHEDULER_H_
-#define COMPONENTS_METRICS_METRICS_REPORTING_SCHEDULER_H_
-
-#include "base/callback.h"
-#include "base/macros.h"
-#include "base/memory/weak_ptr.h"
-#include "base/time/time.h"
-#include "base/timer/timer.h"
-#include "components/metrics/net/network_metrics_provider.h"
-
-namespace metrics {
-
-// Scheduler task to drive a MetricsService object's uploading.
-// TODO(holte): Remove this once we've switched to split schedulers.
-class MetricsReportingScheduler {
- public:
-  // Creates MetricsServiceScheduler object with the given |upload_callback|
-  // callback to call when uploading should happen and
-  // |upload_interval_callback| to determine the interval between uploads
-  // in steady state.
-  MetricsReportingScheduler(
-      const base::Closure& upload_callback,
-      const base::Callback<base::TimeDelta(void)>& upload_interval_callback);
-  virtual ~MetricsReportingScheduler();
-
-  // Starts scheduling uploads. This in a no-op if the scheduler is already
-  // running, so it is safe to call more than once.
-  void Start();
-
-  // Stops scheduling uploads.
-  void Stop();
-
-  // Callback from MetricsService when the startup init task has completed.
-  void InitTaskComplete();
-
-  // Callback from MetricsService when a triggered upload finishes.
-  void UploadFinished(bool server_is_healthy, bool more_logs_remaining);
-
-  // Callback from MetricsService when a triggered upload is cancelled by the
-  // MetricsService.
-  void UploadCancelled();
-
-  // Sets the upload interval to a specific value, exposed for unit tests.
-  void SetUploadIntervalForTesting(base::TimeDelta interval);
-
- protected:
-  enum InitSequence {
-    TIMER_FIRED_FIRST,
-    INIT_TASK_COMPLETED_FIRST,
-    INIT_SEQUENCE_ENUM_SIZE,
-  };
-
- private:
-  // Record the init sequence order histogram.
-  virtual void LogMetricsInitSequence(InitSequence sequence);
-
-  // Record the upload interval time.
-  virtual void LogActualUploadInterval(base::TimeDelta interval);
-
-  // Timer callback indicating it's time for the MetricsService to upload
-  // metrics.
-  void TriggerUpload();
-
-  // Schedules a future call to TriggerUpload if one isn't already pending.
-  void ScheduleNextUpload();
-
-  // Increases the upload interval each time it's called, to handle the case
-  // where the server is having issues.
-  void BackOffUploadInterval();
-
-  // Returns upload interval to use in steady state.
-  base::TimeDelta GetStandardUploadInterval();
-
-  // The MetricsService method to call when uploading should happen.
-  const base::Closure upload_callback_;
-
-  base::OneShotTimer upload_timer_;
-
-  // The interval between being told an upload is done and starting the next
-  // upload.
-  base::TimeDelta upload_interval_;
-
-  // The tick count of the last time log upload has been finished and null if no
-  // upload has been done yet.
-  base::TimeTicks last_upload_finish_time_;
-
-  // Indicates that the scheduler is running (i.e., that Start has been called
-  // more recently than Stop).
-  bool running_;
-
-  // Indicates that the last triggered upload hasn't resolved yet.
-  bool callback_pending_;
-
-  // Whether the InitTaskComplete() callback has been called.
-  bool init_task_complete_;
-
-  // Whether the initial scheduled upload timer has fired before the init task
-  // has been completed.
-  bool waiting_for_init_task_complete_;
-
-  // Callback function used to get the standard upload time.
-  base::Callback<base::TimeDelta(void)> upload_interval_callback_;
-
-  DISALLOW_COPY_AND_ASSIGN(MetricsReportingScheduler);
-};
-
-}  // namespace metrics
-
-#endif  // COMPONENTS_METRICS_METRICS_REPORTING_SCHEDULER_H_