Class: Agent99::AmqpMessageClient

Inherits:
Object
  • Object
show all
Defined in:
lib/agent99/amqp_message_client.rb

Constant Summary collapse

CONFIG = 
{
  host:           "127.0.0.1",
  port:           5672,
  ssl:            false,
  vhost:          "/",
  user:           "guest",
  pass:           "guest",
  heartbeat:      :server, # will use RabbitMQ setting
  frame_max:      131072,
  auth_mechanism: "PLAIN"
}
QUEUE_TTL =

60 seconds TTL

60_000

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(config: CONFIG, logger: Logger.new($stdout)) ⇒ AmqpMessageClient

Returns a new instance of AmqpMessageClient.



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# File 'lib/agent99/amqp_message_client.rb', line 33

def initialize(
    config: CONFIG,
    logger: Logger.new($stdout))
  @config     = config
  @connection = create_amqp_connection
  @channel    = @connection.create_channel
  @exchange   = @channel.default_exchange
  @logger     = logger
end

Instance Attribute Details

#channel ⇒ Object

Returns the value of attribute channel.



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# File 'lib/agent99/amqp_message_client.rb', line 31

def channel
  @channel
end

#exchange ⇒ Object

Returns the value of attribute exchange.



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# File 'lib/agent99/amqp_message_client.rb', line 31

def exchange
  @exchange
end

#logger ⇒ Object

Returns the value of attribute logger.



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# File 'lib/agent99/amqp_message_client.rb', line 31

def logger
  @logger
end

Class Method Details

.instance ⇒ Object 



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# File 'lib/agent99/amqp_message_client.rb', line 26

def instance
  @instance ||= new
end

Instance Method Details

#create_queue(agent_id) ⇒ Object 



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# File 'lib/agent99/amqp_message_client.rb', line 52

def create_queue(agent_id)
  queue_name = "#{agent_id}"
  @channel.queue(queue_name, expires: QUEUE_TTL)
end

#delete_queue(queue_name) ⇒ Object 



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# File 'lib/agent99/amqp_message_client.rb', line 124

def delete_queue(queue_name)
  return logger.warn("Attempted to delete queue with nil name") if queue_name.nil?

  begin
    queue = @channel.queue(queue_name, passive: true)
    queue.delete
    logger.info "Queue #{queue_name} was deleted"
  rescue Bunny::NotFound
    logger.warn "Queue #{queue_name} not found"
  rescue StandardError => e
    logger.error "Error deleting queue #{queue_name}: #{e.message}"
  end
end

#listen_for_messages(queue, request_handler:, response_handler:, control_handler:) ⇒ Object 



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# File 'lib/agent99/amqp_message_client.rb', line 57

def listen_for_messages(
    queue,
    request_handler:,
    response_handler:,
    control_handler:
  )
  queue.subscribe(block: true) do |delivery_info, properties, body|
    message = JSON.parse(body, symbolize_names: true)
    logger.debug "Received message: #{message.inspect}"

    type = message.dig(:header, :type)

    case type
    when "request"
      request_handler.call(message)
    when "response"
      response_handler.call(message)
    when "control"
      control_handler.call(message)
    else
      raise NotImplementedError, "Unsupported message type: #{type}"
    end
  end
end

#publish(message) ⇒ Object 



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# File 'lib/agent99/amqp_message_client.rb', line 83

def publish(message)
  queue_name = message.dig(:header, :to_uuid)

  begin
    # FIXME: message.to_json
    json_payload = JSON.generate(message)

    exchange.publish(json_payload, routing_key: queue_name)

    logger.info "#{message.dig(:header,:type).to_s.upcase} message published successfully to queue: #{queue_name}"
    
    # Return a success status
    { 
      success: true, 
      message: "Message published successfully" 
    }
  
  rescue JSON::GeneratorError => e
    logger.error "Failed to convert payload to JSON: #{e.message}"
    { 
      success: false, 
      error: "JSON conversion error: #{e.message}" 
    }
  
  rescue Bunny::ConnectionClosedError, Bunny::ChannelAlreadyClosed => e
    logger.error "Failed to publish message: #{e.message}"
    { 
      success: false, 
      error: "Publishing error: #{e.message}" 
    }
  
  rescue StandardError => e
    logger.error "Unexpected error while publishing message: #{e.message}"
    { 
      success:  false, 
      error:    "Unexpected error: #{e.message}" 
    }
  end
end

#setup(agent_id:, logger:) ⇒ Object 



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# File 'lib/agent99/amqp_message_client.rb', line 43

def setup(agent_id:, logger:)
  queue = create_queue(agent_id)
  
  logger.info "Created queue for agent_id: #{agent_id}"

  # Returning the queue to be used in the Base class
  queue
end