Simple per-request singleton/delegator for metrics instance in Rails.

[metaskills]

Using Rails?

Want to instrument metrics deep in your code during the request/response lifecycle? Consider creating a PORO like this Metrics example.

class MyMetrics < Aws::Embedded::Metrics::Instance
end

This object is ready to use as a per-request singleton that acts as a simple delegator to all metrics/logger methods. A great way to hook it up for your application is in ApplicationController.

class ApplicationController < ActionController::Base
  around_action :embedded_metrics
  private
  def embedded_metrics
    Aws::Embedded::Metrics.logger do |metrics|
      MyMetrics.instance = MyMetrics.new(metrics)
      yield
    end
  end
end

Now you can happily instrument your code.

proof, time = MyMetrics.benchmark { @imagebuilder.data }
MyMetrics.put_metric 'ImageBuilderTime', time, 'Milliseconds'
MyMetrics.set_property 'ImageId', params[:image_id]