Class: GoodJob::PerformanceShowChart

Inherits:
BaseChart
  • Object
show all
Defined in:
app/charts/good_job/performance_show_chart.rb

Constant Summary collapse

BUCKET_INTERVALS =

These numbers are lifted from Sidekiq

[
  0.02, 0.03, 0.045, 0.065, 0.1,
  0.15, 0.225, 0.335, 0.5, 0.75,
  1.1, 1.7, 2.5, 3.8, 5.75,
  8.5, 13, 20, 30, 45,
  65, 100, 150, 225, 335,
  10**8 # About 3 years
].freeze

Instance Method Summary collapse

Methods inherited from BaseChart

#start_end_binds, #string_to_hsl

Constructor Details

#initialize(job_class) ⇒ PerformanceShowChart

Returns a new instance of PerformanceShowChart.



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# File 'app/charts/good_job/performance_show_chart.rb', line 15

def initialize(job_class)
  super()
  @job_class = job_class
end

Instance Method Details

#data ⇒ Object 



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# File 'app/charts/good_job/performance_show_chart.rb', line 20

def data
  table_name = GoodJob::Execution.table_name

  interval_entries = BUCKET_INTERVALS.map { "interval '#{_1}'" }.join(",")
  sum_query = Arel.sql(GoodJob::Job.pg_or_jdbc_query(<<~SQL.squish))
    SELECT
      WIDTH_BUCKET(duration, ARRAY[#{interval_entries}]) as bucket_index,
      COUNT(WIDTH_BUCKET(duration, ARRAY[#{interval_entries}])) AS count
    FROM #{table_name} sources
    WHERE
      scheduled_at > $1::timestamp
      AND scheduled_at < $2::timestamp
      AND job_class = $3
      AND duration IS NOT NULL
    GROUP BY bucket_index
  SQL

  binds = [
    *start_end_binds,
    @job_class,
  ]
  labels = BUCKET_INTERVALS.map { |interval| GoodJob::ApplicationController.helpers.format_duration(interval) }
  labels[-1] = I18n.t("good_job.performance.show.slow")
  executions_data = GoodJob::Job.connection.exec_query(GoodJob::Job.pg_or_jdbc_query(sum_query), "GoodJob Performance Job Chart", binds)
  executions_data = executions_data.to_a.index_by { |data| data["bucket_index"] }

  bucket_data = 0.upto(BUCKET_INTERVALS.count).map do |bucket_index|
    executions_data.dig(bucket_index, "count") || 0
  end

  {
    type: "bar",
    data: {
      labels: labels,
      datasets: [{
        label: @job_class,
        data: bucket_data,
        backgroundColor: string_to_hsl(@job_class),
        borderColor: string_to_hsl(@job_class),
      }],
    },
    options: {
      scales: {
        y: {
          beginAtZero: true,
        },
      },
    },
  }
end