module Agents class GrowlAgent < Agent attr_reader :growler cannot_be_scheduled! cannot_create_events! gem_dependency_check { defined?(Growl) } description <<-MD The Growl Agent sends any events it receives to a Growl GNTP server immediately. #{'## Include `ruby-growl` in your Gemfile to use this Agent!' if dependencies_missing?} It is assumed that events have a `message` or `text` key, which will hold the body of the growl notification, and a `subject` key, which will have the headline of the Growl notification. You can use Event Formatting Agent if your event does not provide these keys. Set `expected_receive_period_in_days` to the maximum amount of time that you'd expect to pass between Events being received by this Agent. MD def default_options { 'growl_server' => 'localhost', 'growl_password' => '', 'growl_app_name' => 'HuginnGrowl', 'growl_notification_name' => 'Notification', 'expected_receive_period_in_days' => "2" } end def working? last_receive_at && last_receive_at > interpolated['expected_receive_period_in_days'].to_i.days.ago && !recent_error_logs? end def validate_options unless options['growl_server'].present? && options['expected_receive_period_in_days'].present? errors.add(:base, "growl_server and expected_receive_period_in_days are required fields") end end def register_growl @growler = Growl.new interpolated['growl_server'], interpolated['growl_app_name'], "GNTP" @growler.password = interpolated['growl_password'] @growler.add_notification interpolated['growl_notification_name'] end def notify_growl(subject, message) @growler.notify(interpolated['growl_notification_name'], subject, message) end def receive(incoming_events) register_growl incoming_events.each do |event| message = (event.payload['message'] || event.payload['text']).to_s subject = event.payload['subject'].to_s if message.present? && subject.present? log "Sending Growl notification '#{subject}': '#{message}' to #{interpolated(event)['growl_server']} with event #{event.id}" notify_growl(subject,message) else log "Event #{event.id} not sent, message and subject expected" end end end end end