Class: Hanami::Events::Adapter::CloudPubsub Private

Inherits:
Object
  • Object
show all
Defined in:
lib/hanami/events/adapter/cloud_pubsub.rb

Overview

This class is part of a private API. You should avoid using this class if possible, as it may be removed or be changed in the future.

Adapter for Google Cloud Pub/Sub

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(params) ⇒ CloudPubsub

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Returns a new instance of CloudPubsub.



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# File 'lib/hanami/events/adapter/cloud_pubsub.rb', line 16

def initialize(params)
  @pubsub = params[:pubsub]
  @logger = params[:logger] || Logger.new($stdout)
  @listen = params[:listen] || false
  @subscribers = Concurrent::Array.new
  @listeners = Concurrent::Array.new
  @serializer_type = params.fetch(:serializer, :json).to_sym
  @topic_registry = {}
  @mutex = Mutex.new
  @middleware = ::Hanami::Events::CloudPubsub.config.client_middleware
end

Instance Attribute Details

#listeners ⇒ Object (readonly)

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/hanami/events/adapter/cloud_pubsub.rb', line 14

def listeners
  @listeners
end

#middleware ⇒ Object (readonly)

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/hanami/events/adapter/cloud_pubsub.rb', line 14

def middleware
  @middleware
end

#subscribers ⇒ Object (readonly)

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/hanami/events/adapter/cloud_pubsub.rb', line 14

def subscribers
  @subscribers
end

#topic_registry ⇒ Object (readonly)

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/hanami/events/adapter/cloud_pubsub.rb', line 14

def topic_registry
  @topic_registry
end

Instance Method Details

#broadcast(name, input_payload, **message_opts) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Brodcasts event to all subscribes

Parameters:

  • event (Symbol, String) —

    the event name

  • payload (Hash) —

    the event data



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# File 'lib/hanami/events/adapter/cloud_pubsub.rb', line 32

def broadcast(name, input_payload, **message_opts)
  event_name = namespaced(name)
  topic = topic_for event_name
  serialized_payload = serializer.serialize(input_payload)
  attrs = { id: SecureRandom.uuid, event_name: event_name }

  middleware.invoke(serialized_payload, **attrs, **message_opts) do |payload, **opts|
    topic.publish_async(payload, **opts) do |result|
      msg = result.message.grpc.to_h

      if result.succeeded?
        logger.info "Published #{name.inspect} published", **msg
      else
        logger.warn "Failed to broadcast #{name.inspect} event", error: result.error, **msg # rubocop:disable Layout/LineLength
      end
    end
  end
end

#flush_messages ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/hanami/events/adapter/cloud_pubsub.rb', line 70

def flush_messages
  pubs = topic_registry.values.map(&:async_publisher).compact
  pubs.each(&:stop).map(&:wait!)
end

#subscribe(name, id:, **subscriber_opts, &block) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Subscribes block for selected event

Parameters:

  • event_name (Symbol, String) —

    the event name

  • id (String) —

    A unique identifier for the subscriber

  • subscriber_opts (String) —

    Additional options for the subscriber

  • block (Block) —

    to execute when event is broadcasted



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# File 'lib/hanami/events/adapter/cloud_pubsub.rb', line 57

def subscribe(name, id:, **subscriber_opts, &block)
  event_name = namespaced(name)
  namespaced_id = namespaced(id)

  logger.debug("Subscribed listener \"#{id}\" for event \"#{event_name}\"")

  sub = Hanami::Events::CloudPubsub::Subscriber.new(event_name, block, logger)
  @subscribers << sub
  topic = topic_for event_name

  register_listener(event_name, topic, namespaced_id, subscriber_opts)
end