Class: LyberCore::Robot

Inherits:
Object
  • Object
show all
Includes:
Sidekiq::Job
Defined in:
lib/lyber_core/robot.rb

Overview

Base class for all robots. Subclasses should implement the #perform_work method. To enable retries provide the retriable exceptions in the initializer.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(workflow_name, process, check_queued_status: true, retriable_exceptions: []) ⇒ Robot

Returns a new instance of Robot.



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# File 'lib/lyber_core/robot.rb', line 31

def initialize(workflow_name, process, check_queued_status: true, retriable_exceptions: [])
  @workflow_name = workflow_name
  @process = process
  @check_queued_status = check_queued_status
  @retriable_exceptions = retriable_exceptions
end

Instance Attribute Details

#check_queued_status ⇒ Object

Returns the value of attribute check_queued_status.



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# File 'lib/lyber_core/robot.rb', line 23

def check_queued_status
  @check_queued_status
end

#druid ⇒ Object (readonly)

Returns the value of attribute druid.



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# File 'lib/lyber_core/robot.rb', line 22

def druid
  @druid
end

#process ⇒ Object (readonly)

Returns the value of attribute process.



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# File 'lib/lyber_core/robot.rb', line 22

def process
  @process
end

#retriable_exceptions ⇒ Object (readonly)

Returns the value of attribute retriable_exceptions.



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# File 'lib/lyber_core/robot.rb', line 22

def retriable_exceptions
  @retriable_exceptions
end

#workflow_name ⇒ Object (readonly)

Returns the value of attribute workflow_name.



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# File 'lib/lyber_core/robot.rb', line 22

def workflow_name
  @workflow_name
end

Instance Method Details

#bare_druid ⇒ Object 



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# File 'lib/lyber_core/robot.rb', line 106

def bare_druid
  @bare_druid = druid.delete_prefix('druid:')
end

#cocina_object ⇒ Object 



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# File 'lib/lyber_core/robot.rb', line 42

def cocina_object
  @cocina_object ||= object_client.find
end

#druid_object ⇒ Object 



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# File 'lib/lyber_core/robot.rb', line 46

def druid_object
  @druid_object ||= DruidTools::Druid.new(druid, Settings.stacks.local_workspace_root)
end

#object_client ⇒ Object 



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# File 'lib/lyber_core/robot.rb', line 38

def object_client
  @object_client ||= Dor::Services::Client.object(druid)
end

#perform(druid) ⇒ Object

Sets up logging, timing and error handling of the job Calls the #perform_work method, then sets workflow to ‘completed’ or ‘error’ depending on success rubocop:disable Metrics/AbcSize rubocop:disable Metrics/MethodLength



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# File 'lib/lyber_core/robot.rb', line 54

def perform(druid)
  @druid = druid
  Honeybadger.context(druid:, process:, workflow_name:)

  logger.info "#{druid} processing #{process} (#{workflow_name})"
  return unless check_item_queued_or_retry?

  # this is the default note to pass back to workflow service,
  # but it can be overriden by a robot that uses the Robots::ReturnState
  # object to return a status
  note = Socket.gethostname

  # update the workflow status to indicate that started
  workflow.start!(note)

  result = nil
  elapsed = Benchmark.realtime do
    result = perform_work
  end

  # the final workflow state is determined by the return value of the perform step, if it is a ReturnState object,
  # we will use the defined status, otherwise default to completed
  # if a note is passed back, we will also use that instead of the default
  if result.instance_of?(ReturnState)
    workflow_state = result.status
    note = result.note unless result.note.blank?
  else
    workflow_state = 'completed'
  end
  # update the workflow status from its current state to the state returned by perform
  # (or 'completed' as the default)
  # noop allows a robot to not set a workflow as complete, e.g., if that is delegated to another service.
  workflow.complete!(workflow_state, elapsed, note) unless workflow_state == 'noop'

  logger.info "Finished #{druid} in #{format('%0.4f', elapsed)}s"
rescue *retriable_exceptions => e
  handle_error(e)
  workflow.retrying!
  raise
rescue StandardError => e
  handle_error(e)
  workflow.error!(e.message, Socket.gethostname)
end

#perform_work ⇒ Object

Work performed by the robot. This method is to be implemented by robot subclasses.

Raises:

  • (NotImplementedError) 


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# File 'lib/lyber_core/robot.rb', line 102

def perform_work
  raise NotImplementedError
end