Class: CloudFormation::Bridge::Poller

Inherits:
Object
  • Object
show all
Defined in:
lib/cloud_formation/bridge/poller.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(queue_name, executor = CloudFormation::Bridge::Executor.new, logger = Util::LOGGER) ⇒ Poller

Returns a new instance of Poller.



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# File 'lib/cloud_formation/bridge/poller.rb', line 12

def initialize(queue_name, executor = CloudFormation::Bridge::Executor.new, logger = Util::LOGGER)
  @queue_name = queue_name
  @executor = executor
  @logger = logger
end

Instance Attribute Details

#logger ⇒ Object (readonly)

Returns the value of attribute logger.



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# File 'lib/cloud_formation/bridge/poller.rb', line 10

def logger
  @logger
end

#running ⇒ Object (readonly)

Returns the value of attribute running.



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# File 'lib/cloud_formation/bridge/poller.rb', line 10

def running
  @running
end

Instance Method Details

#poll ⇒ Object 



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# File 'lib/cloud_formation/bridge/poller.rb', line 29

def poll
  message = queue.receive_message

  unless message
    logger.info("No messages found, looping again")
    return
  end

  begin
    logger.info("Received message #{message.id} - #{message.body}")
    body = JSON.parse(message.body)
    request = CloudFormation::Bridge::Request.new(JSON.parse(body["Message"]), logger)
    @executor.execute(request)
    message.delete
    logger.info("Processed message #{message.id}")
    message
  rescue Exception => ex
    logger.info("Failed to process message #{message.id} - #{ex.message}")
    ExceptionNotifier.report_exception(ex,
      message: message.body,
      handle: message.handle,
      id: message.id,
      queue: @queue_name,
    )
  end
end

#queue ⇒ Object 



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# File 'lib/cloud_formation/bridge/poller.rb', line 60

def queue
  @queue ||= sqs.queues.named(@queue_name)
end

#sqs ⇒ Object 



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# File 'lib/cloud_formation/bridge/poller.rb', line 64

def sqs
  @sqs ||= AWS::SQS.new
end

#start ⇒ Object 



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# File 'lib/cloud_formation/bridge/poller.rb', line 18

def start
  @running = true
  while @running
    poll
  end
end

#stop ⇒ Object 



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# File 'lib/cloud_formation/bridge/poller.rb', line 25

def stop
  @running = false
end

#visible_messages ⇒ Object 



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# File 'lib/cloud_formation/bridge/poller.rb', line 56

def visible_messages
  queue.visible_messages
end