Class: Delayed::Workless::Scaler::Base

Inherits:
Object
  • Object
show all
Defined in:
lib/workless/scalers/base.rb

Direct Known Subclasses

Heroku, HerokuCedar, Local, Null

Class Method Summary collapse

Class Method Details

.calculate_num_workers(up = false) ⇒ Object 



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# File 'lib/workless/scalers/base.rb', line 24

def self.calculate_num_workers up=false
  num_jobs = self.jobs.count
  @@scale_info ||= {
    0 => 0,
    100 => 1,
    500 => 2,
    1000 => 3
  }
  scale_key = nil
  if up
    scale_key = @@scale_info.keys.select{|v| v > num_jobs }.first
    scale_key ||= @@scale_info.keys.last
  else
    scale_key = @@scale_info.keys.select{|v| v > num_jobs }.first
    scale_key ||= @@scale_info.keys.last
    scale_key = 0 if num_jobs == 0 # special case
  end
  
  if scale_key.nil?
    return 0
  else
    return @@scale_info[scale_key]
  end
end

.jobs ⇒ Object 



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# File 'lib/workless/scalers/base.rb', line 8

def self.jobs
  Delayed::Job.where(:failed_at => nil)
end

.num_workers_cache ⇒ Object 



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# File 'lib/workless/scalers/base.rb', line 16

def self.num_workers_cache
  Rails.cache.read("WORKLESS_NUM_WORKERS") || 0
end

.num_workers_cache=(num) ⇒ Object 



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# File 'lib/workless/scalers/base.rb', line 20

def self.num_workers_cache= num
  Rails.cache.write("WORKLESS_NUM_WORKERS", num)
end

.scale_info=(info) ⇒ Object 



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# File 'lib/workless/scalers/base.rb', line 12

def self.scale_info= info
  @@scale_info = info
end