Class: Lita::Timing::Mutex

Inherits:
Object
  • Object
show all
Defined in:
lib/lita/timing/mutex.rb

Constant Summary collapse

LOCK_TIMEOUT =

seconds

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DEL_SCRIPT = 
<<-EOS
  if redis.call("get",KEYS[1]) == ARGV[1]
  then
    return redis.call("del",KEYS[1])
  else
      return 0
  end
EOS

Instance Method Summary collapse

Constructor Details

#initialize(name, redis) ⇒ Mutex

Returns a new instance of Mutex.



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# File 'lib/lita/timing/mutex.rb', line 18

def initialize(name, redis)
  @name, @redis = name, redis
end

Instance Method Details

#syncronise(&block) ⇒ Object 



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# File 'lib/lita/timing/mutex.rb', line 22

def syncronise(&block)
  token = SecureRandom.hex(10)
  val = nil
  set_with_retry(@name, token, LOCK_TIMEOUT + 1)
  yield
  @redis.eval(DEL_SCRIPT, keys: [@name], argv: [token])
end