Class: Newshound::Jobs::Que

Inherits:
Base
  • Object
show all
Defined in:
lib/newshound/jobs/que.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods inherited from Base

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Constructor Details

#initialize(logger: nil) ⇒ Que

Returns a new instance of Que.



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# File 'lib/newshound/jobs/que.rb', line 8

def initialize(logger: nil)
  @logger = logger || (defined?(Rails) ? Rails.logger : Logger.new($stdout))
end

Instance Attribute Details

#logger ⇒ Object (readonly)

Returns the value of attribute logger.



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# File 'lib/newshound/jobs/que.rb', line 6

def logger
  @logger
end

Instance Method Details

#job_counts_by_type ⇒ Object 



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# File 'lib/newshound/jobs/que.rb', line 33

def job_counts_by_type
  results = ActiveRecord::Base.connection.execute(<<~SQL)
    SELECT job_class,
           COUNT(*) FILTER (WHERE error_count = 0 AND expired_at IS NULL) AS success,
           COUNT(*) FILTER (WHERE error_count > 0 AND expired_at IS NULL) AS failing,
           COUNT(*) FILTER (WHERE expired_at IS NOT NULL) AS expired,
           COUNT(*) AS total
    FROM que_jobs
    WHERE finished_at IS NULL
    GROUP BY job_class
    ORDER BY job_class
  SQL

  results.each_with_object({}) do |row, hash|
    failing = row["failing"].to_i
    expired = row["expired"].to_i

    hash[row["job_class"]] = {
      success: row["success"].to_i,
      failing:,
      expired:,
      failed: failing + expired,
      total: row["total"].to_i
    }
  end
rescue => e
  logger.error "Failed to fetch job counts: #{e.message}"
  {}
end

#queue_statistics ⇒ Object

Que separates two trouble states: a failing job has errored but still has retries left, an expired job has run out of them and needs a human. :failed is the union of the two, kept for callers written before the split.



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# File 'lib/newshound/jobs/que.rb', line 15

def queue_statistics
  conn = ActiveRecord::Base.connection
  current_time = conn.quote(Time.now)
  beginning_of_day = conn.quote(Date.today.to_time)

  {
    ready: count_jobs("finished_at IS NULL AND expired_at IS NULL AND run_at <= #{current_time}"),
    scheduled: count_jobs("finished_at IS NULL AND expired_at IS NULL AND run_at > #{current_time}"),
    failing: count_jobs("error_count > 0 AND finished_at IS NULL AND expired_at IS NULL"),
    expired: count_jobs("expired_at IS NOT NULL"),
    failed: count_jobs("error_count > 0 AND finished_at IS NULL"),
    finished_today: count_jobs("finished_at >= #{beginning_of_day}")
  }
rescue => e
  logger.error "Failed to fetch Que statistics: #{e.message}"
  {ready: 0, scheduled: 0, failing: 0, expired: 0, failed: 0, finished_today: 0}
end