// Copyright (c) 2012 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 CHROME_COMMON_METRICS_METRICS_SERVICE_BASE_H_
#define CHROME_COMMON_METRICS_METRICS_SERVICE_BASE_H_
#pragma once

#include "base/basictypes.h"
#include "base/metrics/histogram.h"
#include "chrome/common/metrics/histogram_sender.h"
#include "chrome/common/metrics/metrics_log_manager.h"

// This class provides base functionality for logging metrics data.
// TODO(ananta): Factor out more common code from chrome and chrome frame
// metrics service into this class.
class MetricsServiceBase : public HistogramSender {
 protected:
  MetricsServiceBase();
  virtual ~MetricsServiceBase();

  // The metrics servers' URLs, for XML and protobuf uploads.
  static const char kServerUrlXml[];
  static const char kServerUrlProto[];

  // The MIME types for the uploaded metrics data, for XML and protobuf uploads.
  static const char kMimeTypeXml[];
  static const char kMimeTypeProto[];

  // Record complete list of histograms into the current log.
  // Called when we close a log.
  void RecordCurrentHistograms();

  // Manager for the various in-flight logs.
  MetricsLogManager log_manager_;

 private:
  // HistogramSender interface (override) methods.
  virtual void TransmitHistogramDelta(
      const base::Histogram& histogram,
      const base::Histogram::SampleSet& snapshot) OVERRIDE;
  virtual void InconsistencyDetected(int problem) OVERRIDE;
  virtual void UniqueInconsistencyDetected(int problem) OVERRIDE;
  virtual void SnapshotProblemResolved(int amount) OVERRIDE;

  DISALLOW_COPY_AND_ASSIGN(MetricsServiceBase);
};

#endif  // CHROME_COMMON_METRICS_METRICS_SERVICE_BASE_H_