Class: Upperkut::Strategy

Inherits:
Object
  • Object
show all
Includes:
Util
Defined in:
lib/upperkut/strategy.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Util

#decode_json_items, #encode_json_items, #to_underscore

Constructor Details

#initialize(worker, redis) ⇒ Strategy

Returns a new instance of Strategy.



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# File 'lib/upperkut/strategy.rb', line 9

def initialize(worker, redis)
  self.worker = worker
  self.redis  = redis
end

Instance Attribute Details

#redis ⇒ Object

Returns the value of attribute redis.



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# File 'lib/upperkut/strategy.rb', line 7

def redis
  @redis
end

#worker ⇒ Object

Returns the value of attribute worker.



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# File 'lib/upperkut/strategy.rb', line 7

def worker
  @worker
end

Instance Method Details

#clear ⇒ Object 



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# File 'lib/upperkut/strategy.rb', line 44

def clear
  redis.del(key)
end

#fetch_items(batch_size = 1000) ⇒ Object 



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# File 'lib/upperkut/strategy.rb', line 20

def fetch_items(batch_size = 1000)
  stop = [batch_size, size].min

  items = redis.multi do
    stop.times do
      redis.lpop(key)
    end
  end

  decode_json_items(items)
end

#latency ⇒ Object 



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# File 'lib/upperkut/strategy.rb', line 36

def latency
  item = redis.lrange(key, 0, 0)
  item = decode_json_items(item).first
  return 0 unless item
  now = Time.now.to_f
  now - item.fetch('enqueued_at', Time.now).to_f
end

#push_items(items = []) ⇒ Object 



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# File 'lib/upperkut/strategy.rb', line 14

def push_items(items = [])
  items = [items] if items.is_a?(Hash)
  return false if items.empty?
  redis.rpush(key, encode_json_items(items))
end

#size ⇒ Object 



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# File 'lib/upperkut/strategy.rb', line 32

def size
  redis.llen(key)
end