Class: Cuniculus::QueueConfig

Inherits:
Object
  • Object
show all
Defined in:
lib/cuniculus/queue_config.rb

Constant Summary collapse

OPTS = 
{}.freeze
DEFAULT_MAX_RETRY = 
4

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(opts = OPTS) ⇒ QueueConfig

Returns a new instance of QueueConfig.



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# File 'lib/cuniculus/queue_config.rb', line 15

def initialize(opts = OPTS)
  @name = read_opt(opts, "name") || "cun_default"
  @max_retry = read_opt(opts, "max_retry") || DEFAULT_MAX_RETRY
  @thread_pool_size = read_opt(opts, "thread_pool_size")
end

Instance Attribute Details

#max_retry ⇒ Object (readonly)

Returns the value of attribute max_retry.



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# File 'lib/cuniculus/queue_config.rb', line 13

def max_retry
  @max_retry
end

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/cuniculus/queue_config.rb', line 13

def name
  @name
end

#thread_pool_size ⇒ Object (readonly)

Returns the value of attribute thread_pool_size.



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# File 'lib/cuniculus/queue_config.rb', line 13

def thread_pool_size
  @thread_pool_size
end

Instance Method Details

#declare!(channel) ⇒ Object 



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# File 'lib/cuniculus/queue_config.rb', line 25

def declare!(channel)
  queue_name = name
  base_q = channel.queue(
    queue_name,
    durable: true,
    exclusive: false,
    arguments: { "x-dead-letter-exchange" => Cuniculus::CUNICULUS_DLX_EXCHANGE }
  )
  base_q.bind(Cuniculus::CUNICULUS_EXCHANGE, { routing_key: name })

  retry_queue_names = (1..max_retry).map { |i| "#{name}_#{i}" }
  max_retry.times do |i|
    queue_name = retry_queue_names[i]

    q = channel.queue(
      queue_name,
      durable: true,
      exclusive: false,
      arguments: {
        "x-dead-letter-exchange" => Cuniculus::CUNICULUS_EXCHANGE,
        "x-dead-letter-routing-key" => name,
        "x-message-ttl" => ((i**4) + (15 * (i + 1))) * 1000
      }
    )
    q.bind(Cuniculus::CUNICULUS_EXCHANGE, { routing_key: queue_name })
  end

  Cuniculus::JobQueue.new(base_q, retry_queue_names)
rescue Bunny::PreconditionFailed => e
  raise Cuniculus.convert_exception_class(e, Cuniculus::RMQQueueConfigurationConflict), "Declaration failed for queue '#{queue_name}'"
end

#read_opt(opts, key) ⇒ Object 



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# File 'lib/cuniculus/queue_config.rb', line 21

def read_opt(opts, key)
  opts[key.to_s] || opts[key.to_sym]
end