Class: Howler::Manager

Inherits:
Object
  • Object
show all
Includes:
Celluloid
Defined in:
lib/howler/manager.rb

Constant Summary collapse

DEFAULT = 
"pending:default"

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Manager

Returns a new instance of Manager.



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# File 'lib/howler/manager.rb', line 18

def initialize
  @done = false
  @logger = Howler::Logger.new
  @options = {}
  @workers = []
  @chewing = []
end

Instance Attribute Details

#chewing ⇒ Object (readonly)

Returns the value of attribute chewing.



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# File 'lib/howler/manager.rb', line 12

def chewing
  @chewing
end

#workers ⇒ Object (readonly)

Returns the value of attribute workers.



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# File 'lib/howler/manager.rb', line 12

def workers
  @workers
end

Class Method Details

.current ⇒ Object 



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# File 'lib/howler/manager.rb', line 14

def self.current
  @current ||= Howler::Manager.new
end

Instance Method Details

#done? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/howler/manager.rb', line 83

def done?
  @done
end

#done_chewing(worker) ⇒ Object 



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# File 'lib/howler/manager.rb', line 87

def done_chewing(worker)
  worker = @chewing.delete(worker)
  @workers.push(worker) if worker.alive?
  nil
end

#push(klass, method, args, wait_until = Time.now) ⇒ Object 



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# File 'lib/howler/manager.rb', line 69

def push(klass, method, args, wait_until = Time.now)
  queue = Howler::Queue.new(DEFAULT)

  message = {
    :id => Howler.next(:id),
    :class => klass.to_s,
    :method => method,
    :args => args,
    :created_at => Time.now.to_f
  }

  queue.push(message, wait_until)
end

#run ⇒ Object 



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# File 'lib/howler/manager.rb', line 33

def run
  @workers = build_workers

  loop do
    break if done?
    scale_workers

    messages, range_messages = [], []

    Howler.redis.with do |redis|
      range_messages = redis.zrange(DEFAULT, 0, @workers.size - 1) if @workers.size > 0
      messages = redis.zrangebyscore(DEFAULT, '-inf', Time.now.to_f)

      if messages.size >= @workers.size
        messages = range_messages
      end

      redis.zremrangebyrank(DEFAULT, 0, messages.size - 1) unless messages.size == 0
    end

    @logger.log do |log|
      log.info("Processing #{messages.size} Messages") if messages.size > 0

      sleep(1) unless messages.any?

      messages.each do |message|
        message = Howler::Message.new(MultiJson.decode(message))
        log.debug("MESG - #{message.id} #{message.klass}.new.#{message.method}(#{Howler.args(message.args)})")

        worker = begin_chewing
        worker.perform!(message, Howler::Queue::DEFAULT)
      end
    end
  end
end

#shutdown ⇒ Object 



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# File 'lib/howler/manager.rb', line 26

def shutdown
  @done = true
  current_size = @workers.size
  @workers = []
  current_size
end

#worker_death(actor = nil, reason = nil) ⇒ Object 



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# File 'lib/howler/manager.rb', line 93

def worker_death(actor=nil, reason=nil)
  @chewing.delete(actor)
  @workers.push Howler::Worker.new_link
end