// Copyright 2016 Google Inc. All Rights Reserved

#include "metrics_front_end.h"

#include <stddef.h>

#include <log.h>

namespace wvcdm {
namespace metrics {

MetricsFrontEnd* MetricsFrontEnd::instance_ = NULL;

MetricsFrontEnd::MetricsFrontEnd(Report* root) :
    root_(root) { }

MetricNotification* MetricsFrontEnd::CreateSubscriber() {
  return root_ == NULL ? NULL : root_->NewReport();
}

MetricsFrontEnd& MetricsFrontEnd::Instance() {
  static MetricsFrontEnd kDummy(NULL);
  return instance_ == NULL ? kDummy : *instance_;
}

void MetricsFrontEnd::OverrideInstance(MetricsFrontEnd* instance) {
  instance_ = instance;
}

} // namespace metrics
} // namespace wvcdm