Class: ForemanStatistics::TrendImporter

Inherits:
Object
  • Object
show all
Defined in:
app/services/foreman_statistics/trend_importer.rb

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.should_create_counter?(latest_counter, new_count, _timestamp) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'app/services/foreman_statistics/trend_importer.rb', line 55

def self.should_create_counter?(latest_counter, new_count, _timestamp)
  return true if latest_counter.nil?

  latest_counter.count != new_count
end

.update! ⇒ Object 



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# File 'app/services/foreman_statistics/trend_importer.rb', line 3

def self.update!
  importer = new
  importer.check_values
  importer.update_trend_counters
  importer.aggregate_counters
end

Instance Method Details

#aggregate_counters ⇒ Object 



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# File 'app/services/foreman_statistics/trend_importer.rb', line 61

def aggregate_counters; end

#check_values ⇒ Object

Check for missing values Comparing a count prior to trying to recreating them all for efficiency sake



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# File 'app/services/foreman_statistics/trend_importer.rb', line 12

def check_values
  ForemanTrend.types.pluck(:trendable_type).each do |trend_type|
    changes = trend_type.constantize.pluck(:id) - ForemanTrend.has_value.where(:trendable_type => trend_type).pluck(:trendable_id)
    ForemanTrend.create_values(trend_type) unless changes.empty?
  end

  FactTrend.types.pluck(:trendable_id).each do |fact_name_id|
    changes = FactValue.where(:fact_name_id => fact_name_id).group(:value).pluck(:value) - FactTrend.has_value.where(:trendable_id => fact_name_id).pluck(:fact_value)
    FactTrend.create_values(fact_name_id) unless changes.empty?
  end
end

#update_trend_counters ⇒ Object 



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# File 'app/services/foreman_statistics/trend_importer.rb', line 24

def update_trend_counters
  timestamp = Time.now.utc
  counter_hash = {}
  Trend.types.each do |trend|
    if trend.is_a? FactTrend
      counter_hash[trend.trendable_id]   = Host.joins(:fact_values).where(:fact_values => { :fact_name_id => trend.trendable_id }).group(:value).count
    else
      counter_hash[trend.trendable_type] = Host.group(trend.trendable_type.foreign_key.to_sym).count
    end
  end
  Trend.has_value.each do |trend|
    new_count = if trend.is_a? FactTrend
                  counter_hash[trend.trendable_id][trend.fact_value]
                else
                  counter_hash[trend.trendable_type][trend.trendable_id]
                end || 0

    latest_counter = trend.trend_counters.order(:created_at).last
    if latest_counter
      latest_counter.interval_end = timestamp
      latest_counter.save!
    end

    next unless self.class.should_create_counter?(latest_counter, new_count, timestamp)

    trend.trend_counters.create!  :count => new_count,
                                  :created_at => timestamp,
                                  :interval_start => timestamp
  end
end