Class: Qwrapper::Queues::RabbitMQ

Inherits:
Base
  • Object
show all
Defined in:
lib/qwrapper/queues/rabbitmq.rb

Instance Attribute Summary

Attributes inherited from Base

#config, #requeue_errors, #requeue_lambda

Instance Method Summary collapse

Methods inherited from Base

#initialize

Methods included from Loggable

#logger, #logger=

Constructor Details

This class inherits a constructor from Qwrapper::Queues::Base

Instance Method Details

#connect! ⇒ Object 



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# File 'lib/qwrapper/queues/rabbitmq.rb', line 65

def connect!
  connection.start if connection
end

#disconnect! ⇒ Object 



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# File 'lib/qwrapper/queues/rabbitmq.rb', line 69

def disconnect!
  connection.close if connection
end

#publish(queue_name, messages, options = {}) ⇒ Object 



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# File 'lib/qwrapper/queues/rabbitmq.rb', line 44

def publish(queue_name, messages, options={})
  ch = nil
  begin
    logger.info "Publishing to '#{queue_name}'"
    messages = [messages] unless messages.is_a?(Array)
    messages.flatten!
    if messages.count > 0
      ch = connection.create_channel
      ch.prefetch(options[:prefetch] || 1)
      queue = ch.queue(queue_name, options.merge(durable: true))
      messages.each do |message|
        queue.publish(message.to_s, :persistent => true)
      end
    end
  rescue Exception => ex
    logger.error ex
  ensure
    ch.close if ch
  end
end

#subscribe(queue_name, options = {}, &block) ⇒ Object 



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# File 'lib/qwrapper/queues/rabbitmq.rb', line 13

def subscribe(queue_name, options={}, &block)
  ch = nil
  begin
    logger.info "Subscribing to '#{queue_name}'"
    ch = connection.create_channel
    ch.prefetch(options[:prefetch] || 1)
    queue = ch.queue(queue_name, options.merge(durable: true))
    queue.subscribe(ack: true, block: true) do |delivery_info, metadata, payload|
      begin
        if logger.respond_to?(:wrap)
          logger_wrapped_block_execution(payload, &block)
        else
          block_execution(payload, &block)
        end
      rescue *requeue_errors => ex
        if requeue_lambda
          requeue_lambda.call(queue_name, payload, ex)
        else
          logger.error "No requeue_lambda provided"
          raise ex
        end
      end
      queue.channel.ack(delivery_info.delivery_tag)
    end
  rescue Exception => ex
    logger.error ex
  ensure
    ch.close if ch
  end
end