Class: Fluent::Plugin::GcloudPubSubOutput

Inherits:
Output
  • Object
show all
Includes:
Fluent::PluginHelper::Inject
Defined in:
lib/fluent/plugin/out_gcloud_pubsub.rb

Constant Summary collapse

DEFAULT_BUFFER_TYPE = 
"memory"
DEFAULT_FORMATTER_TYPE = 
"json"

Instance Method Summary collapse

Instance Method Details

#configure(conf) ⇒ Object 



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# File 'lib/fluent/plugin/out_gcloud_pubsub.rb', line 43

def configure(conf)
  compat_parameters_convert(conf, :buffer, :formatter)
  super
  placeholder_validate!(:topic, @topic)
  @formatter = formatter_create
end

#format(tag, time, record) ⇒ Object 



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# File 'lib/fluent/plugin/out_gcloud_pubsub.rb', line 55

def format(tag, time, record)
  record = inject_values_to_record(tag, time, record)
  attributes = {}
  @attribute_keys.each do |key|
    attributes[key] = record.delete(key)
  end
  [@formatter.format(tag, time, record), attributes].to_msgpack
end

#formatted_to_msgpack_binary? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fluent/plugin/out_gcloud_pubsub.rb', line 64

def formatted_to_msgpack_binary?
  true
end

#multi_workers_ready? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fluent/plugin/out_gcloud_pubsub.rb', line 68

def multi_workers_ready?
  true
end

#start ⇒ Object 



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# File 'lib/fluent/plugin/out_gcloud_pubsub.rb', line 50

def start
  super
  @publisher = Fluent::GcloudPubSub::Publisher.new @project, @key, @autocreate_topic, @dest_project
end

#write(chunk) ⇒ Object 



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# File 'lib/fluent/plugin/out_gcloud_pubsub.rb', line 72

def write(chunk)
  topic = extract_placeholders(@topic, chunk.metadata)

  messages = []
  size = 0

  chunk.msgpack_each do |msg, attr|
    msg = Fluent::GcloudPubSub::Message.new(msg, attr)
    if msg.bytesize > @max_message_size
      log.warn 'Drop a message because its size exceeds `max_message_size`', size: msg.bytesize
      next
    end
    if messages.length + 1 > @max_messages || size + msg.bytesize > @max_total_size
      publish(topic, messages)
      messages = []
      size = 0
    end
    messages << msg
    size += msg.bytesize
  end

  if messages.length > 0
    publish(topic, messages)
  end
rescue Fluent::GcloudPubSub::RetryableError => ex
  log.warn "Retryable error occurs. Fluentd will retry.", error_message: ex.to_s, error_class: ex.class.to_s
  raise ex
rescue => ex
  log.error "unexpected error", error_message: ex.to_s, error_class: ex.class.to_s
  log.error_backtrace
  raise ex
end