Class: SidekiqQueueStatus::Middleware

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

Constant Summary collapse

DEFAULT_TRESHOLD = 
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HEADERS = 
{
  'Content-Type' => 'application/json',
  'Cache-Control' => 'no-cache'
}

Instance Method Summary collapse

Constructor Details

#initialize(app, configured_tresholds) ⇒ Middleware

Returns a new instance of Middleware.



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# File 'lib/sidekiq_queue_status/middleware.rb', line 11

def initialize(app, configured_tresholds)
  @app = app
  @latency_treshold = Hash.new(DEFAULT_TRESHOLD).merge(configured_tresholds)
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/sidekiq_queue_status/middleware.rb', line 16

def call(env)
  if env["PATH_INFO"] =~ %r{\A/queue-status\Z}
    errors = []
    queues.each do |name, latency|
      max_latency = @latency_treshold[name]
      errors << "Queue #{name} above threshold of #{max_latency}s" if latency > max_latency
    end
    body = { latencies: queues, errors: errors }.to_json
    status = errors.any? ? 503 : 200
    [status, HEADERS, [body]]
  else
    @app.call(env)
  end
end

#queues ⇒ Object 



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# File 'lib/sidekiq_queue_status/middleware.rb', line 31

def queues
  Sidekiq::Queue.all.map { |q| [q.name, q.latency.to_i] }.to_h
end