Class: Watcher

Inherits:
Object
  • Object
show all
Defined in:
lib/bender/watcher.rb

Direct Known Subclasses

GodUnmonitor, WatcherLifeCycleHook

Instance Method Summary collapse

Constructor Details

#initialize(queue_name, options) ⇒ Watcher

Returns a new instance of Watcher.



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# File 'lib/bender/watcher.rb', line 15

def initialize(queue_name, options)
  @queue_name = queue_name
  @options = options
  load_queue
end

Instance Method Details

#load_queue ⇒ Object 



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# File 'lib/bender/watcher.rb', line 25

def load_queue
  @queue ||= Bender::Client.sqs.queues.create(
    self.name,
    @options[:create_options]
  )
rescue Exception => ex
  Bender.logger.error("#{self.class}: #{ex.message}#{ex.backtrace.join("\n")}")
end

#name ⇒ Object 



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# File 'lib/bender/watcher.rb', line 11

def name
  @name ||= "#{@queue_name}-#{self.class.to_s.underscore}"
end

#publish(message, ack = nil) ⇒ Object 



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# File 'lib/bender/watcher.rb', line 45

def publish(message, ack = nil)
  unless message.is_a?(Hash)
    message = JSON.parse(message)
  end

  message.merge!(ack) if ack

  @queue.send_message(message.to_json)
rescue Exception => ex
  Bender.logger.error("#{self.class}: #{ex.message}#{ex.backtrace.join("\n")}")
end

#start ⇒ Object 



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# File 'lib/bender/watcher.rb', line 21

def start
  subscribe
end

#subscribe ⇒ Object 



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# File 'lib/bender/watcher.rb', line 34

def subscribe
  while Bender::Client.keep_running? do
    Bender.logger.info("Polling #{@queue.arn} for #{self.class.to_s}")
    @queue.poll(@options[:poll_options]) do |received_message|
      safe_perform(received_message.body)
    end
  end
rescue Exception => ex
  Bender.logger.error("#{self.class}: #{ex.message}#{ex.backtrace.join("\n")}")
end