Module: Messaging::Write

Included in:
Controls::Write::Example, Substitute::Write
Defined in:
lib/messaging/write.rb,
lib/messaging/write/substitute.rb

Defined Under Namespace

Modules: Build, Call, Configure, Substitute, Telemetry Classes: Error

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.included(cls) ⇒ Object 



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# File 'lib/messaging/write.rb', line 5

def self.included(cls)
  cls.class_exec do
    include Dependency
    include Virtual
    include Log::Dependency

    dependency :message_writer
    dependency :telemetry, ::Telemetry

    extend Build
    extend Call
    extend Configure

    abstract :configure

    const_set :Substitute, Substitute
  end
end

.register_telemetry_sink(writer) ⇒ Object 



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# File 'lib/messaging/write.rb', line 127

def self.register_telemetry_sink(writer)
  sink = Telemetry.sink
  writer.telemetry.register sink
  sink
end

Instance Method Details

#call(message_or_batch, stream_name, expected_version: nil, reply_stream_name: nil) ⇒ Object Also known as: write 



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# File 'lib/messaging/write.rb', line 48

def call(message_or_batch, stream_name, expected_version: nil, reply_stream_name: nil)
  unless message_or_batch.is_a? Array
    logger.trace(tag: :write) { "Writing message (Type: #{message_or_batch.class.message_type}, Stream Name: #{stream_name}, Expected Version: #{expected_version.inspect}, Reply Stream Name: #{reply_stream_name.inspect})" }
  else
    logger.trace(tag: :write) do
      message_types = message_or_batch.map {|message| message.class.message_type }.uniq.join(', ')
      "Writing batch (Types: #{message_types}, Stream Name: #{stream_name}, Expected Version: #{expected_version.inspect}, Reply Stream Name: #{reply_stream_name.inspect})"
    end
  end
  logger.trace(tags: [:data, :message]) { message_or_batch.pretty_inspect }

  message_batch = Array(message_or_batch)

  message_data_batch = message_data_batch(message_batch, reply_stream_name)
  last_position = message_writer.(message_data_batch, stream_name, expected_version: expected_version)

  unless message_or_batch.is_a? Array
    logger.info(tag: :write) { "Wrote message (Type: #{message_or_batch.class.message_type}, Stream Name: #{stream_name}, Position: #{last_position}, Expected Version: #{expected_version.inspect}, Reply Stream Name: #{reply_stream_name.inspect})" }
  else
    logger.info(tag: :write) do
      message_types = message_or_batch.map {|message| message.class.message_type }.uniq.join(', ')
      "Wrote batch (Types: #{message_types}, Stream Name: #{stream_name}, Position: #{last_position}, Expected Version: #{expected_version.inspect}, Reply Stream Name: #{reply_stream_name.inspect})"
    end
  end
  logger.info(tags: [:data, :message]) { message_data_batch.pretty_inspect }

  message_batch.each do |message|
    telemetry.record :written, Telemetry::Data.new(message, stream_name, expected_version, reply_stream_name)
  end

  last_position
end

#initial(message, stream_name) ⇒ Object Also known as: write_initial 



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# File 'lib/messaging/write.rb', line 122

def initial(message, stream_name)
  write(message, stream_name, expected_version: :no_stream)
end

#message_data_batch(message_batch, reply_stream_name = nil) ⇒ Object 



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# File 'lib/messaging/write.rb', line 82

def message_data_batch(message_batch, reply_stream_name=nil)
  message_data_batch = []
  message_batch.each do |message|
    unless reply_stream_name.nil?
       message.metadata.reply_stream_name = reply_stream_name
    end

    message_data_batch << Message::Export.(message)
  end

  message_data_batch
end

#reply(message) ⇒ Object 



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# File 'lib/messaging/write.rb', line 95

def reply(message)
  if message.is_a? Array
    error_msg = "Cannot reply with a batch"
    logger.error { error_msg }
    raise Error, error_msg
  end

  metadata = message.metadata
  reply_stream_name = metadata.reply_stream_name

  logger.trace(tags: [:write, :reply]) { "Replying (Message Type: #{message.message_type}, Stream Name: #{reply_stream_name.inspect})" }

  if reply_stream_name.nil?
    error_msg = "Message has no reply stream name. Cannot reply. (Message Type: #{message.message_type})"
    logger.error { error_msg }
    logger.error(tags: [:data, :message]) { message.pretty_inspect }
    raise Error, error_msg
  end

  metadata.clear_reply_stream_name

  write(message, reply_stream_name).tap do
    logger.info(tags: [:write, :reply]) { "Replied (Message Type: #{message.message_type}, Stream Name: #{reply_stream_name})" }
    telemetry.record :replied, Telemetry::Data.new(message, reply_stream_name)
  end
end