Class: Vert::Outbox::Publisher

Inherits:
Object
  • Object
show all
Defined in:
lib/vert/outbox/publisher.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Publisher

Returns a new instance of Publisher.



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# File 'lib/vert/outbox/publisher.rb', line 10

def initialize
  @connection = nil
  @channel = nil
  @exchange = nil
end

Instance Attribute Details

#channel ⇒ Object (readonly)

Returns the value of attribute channel.



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# File 'lib/vert/outbox/publisher.rb', line 8

def channel
  @channel
end

#connection ⇒ Object (readonly)

Returns the value of attribute connection.



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# File 'lib/vert/outbox/publisher.rb', line 8

def connection
  @connection
end

#exchange ⇒ Object (readonly)

Returns the value of attribute exchange.



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# File 'lib/vert/outbox/publisher.rb', line 8

def exchange
  @exchange
end

Class Method Details

.publish_pending(batch_size: 100) ⇒ Object 



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# File 'lib/vert/outbox/publisher.rb', line 69

def publish_pending(batch_size: 100)
  return { published: 0, failed: 0, error: "OutboxEvent not defined" } unless outbox_event_class
  results = { published: 0, failed: 0 }
  with_connection do |publisher|
    outbox_event_class.publishable.find_in_batches(batch_size: batch_size) do |events|
      batch_results = publisher.publish_batch(events)
      results[:published] += batch_results[:published]
      results[:failed] += batch_results[:failed]
    end
  end
  results
end

.with_connection ⇒ Object 



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# File 'lib/vert/outbox/publisher.rb', line 61

def with_connection
  publisher = new
  publisher.connect
  yield publisher
ensure
  publisher&.close
end

Instance Method Details

#close ⇒ Object 



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# File 'lib/vert/outbox/publisher.rb', line 24

def close
  @connection&.close
  @connection = nil
  @channel = nil
  @exchange = nil
end

#connect ⇒ Object 



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# File 'lib/vert/outbox/publisher.rb', line 16

def connect
  @connection = Bunny.new(Vert.config.rabbitmq_url)
  @connection.start
  @channel = @connection.create_channel
  @exchange = @channel.topic(Vert.config.exchange_name, durable: true)
  self
end

#connected? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/vert/outbox/publisher.rb', line 31

def connected?
  @connection&.open? && @channel&.open?
end

#publish(event) ⇒ Object 



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# File 'lib/vert/outbox/publisher.rb', line 35

def publish(event)
  connect unless connected?
  message = build_message(event)
  @exchange.publish(
    message.to_json,
    routing_key: event.routing_key,
    persistent: true,
    content_type: "application/json",
    message_id: event.id.to_s,
    timestamp: event.created_at.to_i,
    headers: event.message_headers
  )
  event.mark_as_published!
  true
rescue StandardError => e
  event.mark_as_failed!(e)
  false
end

#publish_batch(events) ⇒ Object 



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# File 'lib/vert/outbox/publisher.rb', line 54

def publish_batch(events)
  results = { published: 0, failed: 0 }
  events.each { |event| publish(event) ? results[:published] += 1 : results[:failed] += 1 }
  results
end