# Pass options to the constructor
# where options is a Hash of settings accepted by Datadog::Tracer#initialize
Datadog::OpenTracer::Tracer.new(options).tap do |tracer|
  # Be sure to set the global tracer
  OpenTracing.global_tracer = tracer

  # Get the underlying Datadog::Tracer
  tracer.datadog_tracer

  # Configure the tracer with additional options
  # where options is a Hash of settings accepted by Datadog::Tracer#configure
  tracer.configure(options)

  # Integrations and other settings should be activated using
  # the existing Datadog configuration API.
  Datadog.configure do |c|
    c.use :rails
  end
end

# Activate Datadog open tracer
OpenTracing.global_tracer = Datadog::OpenTracer::Tracer.new(options)

# Activate and configure integrations
Datadog.configure do |c|
  c.use :rails
end