Class: RailsAutoscaleAgent::WorkerAdapters::DelayedJob

Inherits:
Object
  • Object
show all
Includes:
Logger, Singleton
Defined in:
lib/rails_autoscale_agent/worker_adapters/delayed_job.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Logger

#logger

Instance Attribute Details

#queues=(value) ⇒ Object

Sets the attribute queues

Parameters:

  • value —

    the value to set the attribute queues to.



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# File 'lib/rails_autoscale_agent/worker_adapters/delayed_job.rb', line 11

def queues=(value)
  @queues = value
end

Instance Method Details

#collect!(store) ⇒ Object 



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# File 'lib/rails_autoscale_agent/worker_adapters/delayed_job.rb', line 22

def collect!(store)
  log_msg = String.new
  t = Time.now.utc
  sql = <<~SQL
    SELECT COALESCE(queue, 'default'), min(run_at)
    FROM delayed_jobs
    WHERE locked_at IS NULL
    AND failed_at IS NULL
    GROUP BY queue
  SQL

  run_at_by_queue = Hash[select_rows_silently(sql)]

  # Don't collect worker metrics if there are unreasonable number of queues
  if run_at_by_queue.size > Config.instance.max_queues
    logger.warn "Skipping DelayedJob metrics - #{run_at_by_queue.size} queues exceeds the #{Config.instance.max_queues} queue limit"
    return
  end

  self.queues = queues | run_at_by_queue.keys

  if track_long_running_jobs?
    sql = <<~SQL
      SELECT COALESCE(queue, 'default'), count(*)
      FROM delayed_jobs
      WHERE locked_at IS NOT NULL
      AND locked_by IS NOT NULL
      AND failed_at IS NULL
      GROUP BY 1
    SQL

    busy_count_by_queue = Hash[select_rows_silently(sql)]
    self.queues = queues | busy_count_by_queue.keys
  end

  queues.each do |queue|
    run_at = run_at_by_queue[queue]
    # DateTime.parse assumes a UTC string
    run_at = DateTime.parse(run_at) if run_at.is_a?(String)
    latency_ms = run_at ? ((t - run_at)*1000).ceil : 0
    latency_ms = 0 if latency_ms < 0

    store.push latency_ms, t, queue
    log_msg << "dj-qt.#{queue}=#{latency_ms} "

    if track_long_running_jobs?
      busy_count = busy_count_by_queue[queue] || 0
      store.push busy_count, Time.now, queue, :busy
      log_msg << "dj-busy.#{queue}=#{busy_count} "
    end
  end

  logger.debug log_msg unless log_msg.empty?
end

#enabled? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rails_autoscale_agent/worker_adapters/delayed_job.rb', line 13

def enabled?
  if defined?(::Delayed::Job) && defined?(::Delayed::Backend::ActiveRecord)
    log_msg = String.new("DelayedJob enabled (#{default_timezone})")
    log_msg << " with long-running job support" if track_long_running_jobs?
    logger.info log_msg
    true
  end
end