Class: Resque::Plugins::Brokered::Broker

Inherits:
Object
  • Object
show all
Defined in:
lib/resque/plugins/brokered/broker.rb

Instance Method Summary collapse

Constructor Details

#initialize(redis, queues) ⇒ Broker

Returns a new instance of Broker.



5
6
7
8
 
# File 'lib/resque/plugins/brokered/broker.rb', line 5

def initialize redis, queues
  @redis = redis
  @queues = queues
end

Instance Method Details

#available_queues ⇒ Object 



10
11
12
 
# File 'lib/resque/plugins/brokered/broker.rb', line 10

def available_queues
  @redis.sdiff :queues, :active_queues
end

#filter_queues(queues) ⇒ Object 



14
15
16
 
# File 'lib/resque/plugins/brokered/broker.rb', line 14

def filter_queues queues
  queues.select {|q| queues_regex.match q}
end

#get_queue ⇒ Object 



18
19
20
21
 
# File 'lib/resque/plugins/brokered/broker.rb', line 18

def get_queue
  queues = filter_queues(available_queues)
  queues.shuffle.detect {|name| @redis.llen("queue:#{name}") > 0  }
end

#pop ⇒ Object 



27
28
29
30
31
32
33
34
35
36
37
38
 
# File 'lib/resque/plugins/brokered/broker.rb', line 27

def pop
  @redis.watch "#{@redis.namespace}:active_queues"
  return nil unless queue_name = get_queue
  @redis.multi
  @redis.sadd :active_queues, queue_name
  @redis.lpop "queue:#{queue_name}"
  add, value = @redis.exec

  [queue_name, Resque.decode(value)]
ensure
  @redis.unwatch
end

#queues_regex ⇒ Object 



23
24
25
 
# File 'lib/resque/plugins/brokered/broker.rb', line 23

def queues_regex
  /^(?:#{@queues.join('|')}).*/
end