Class: Berater::Middleware::Trace

Inherits:
Object
  • Object
show all
Defined in:
lib/berater/middleware/trace.rb

Instance Method Summary collapse

Constructor Details

#initialize(tracer: nil) ⇒ Trace

Returns a new instance of Trace.



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# File 'lib/berater/middleware/trace.rb', line 4

def initialize(tracer: nil)
  @tracer = tracer
end

Instance Method Details

#call(limiter) ⇒ Object 



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# File 'lib/berater/middleware/trace.rb', line 8

def call(limiter, **)
  return yield unless tracer

  tracer.trace('Berater') do |span|
    begin
      lock = yield
    rescue StandardError => error
      # capture exception for reporting, then propagate
      raise
    ensure
      span.set_tag('capacity', limiter.capacity)
      span.set_tag('contention', lock.contention) if lock
      span.set_tag('key', limiter.key)
      span.set_tag('limiter', limiter.class.to_s.split(':')[-1])

      if error
        if error.is_a?(Berater::Overloaded)
          span.set_tag('overloaded', true)
        else
          span.set_tag('error', error.class.to_s.gsub('::', '_'))
        end
      end
    end
  end
end