Class: Yabeda::Datadog::Worker

Inherits:
Object
  • Object
show all
Defined in:
lib/yabeda/datadog/worker.rb,
lib/yabeda/datadog/worker/send.rb,
lib/yabeda/datadog/worker/register.rb

Overview

Perform actions async

Constant Summary collapse

SEND = 
proc do |accumulated_payload|
  begin
    dogstatsd = ::Datadog::Statsd.new(
      Yabeda::Datadog.config.agent_host,
      Yabeda::Datadog.config.agent_port,
      single_thread: true,
    )

    Logging.instance.debug("sending batch of #{accumulated_payload.size} metrics")
    begin
      dogstatsd.batch do |stats|
        accumulated_payload.each do |payload|
          metric = payload.fetch(:metric)
          value = payload.fetch(:value)
          tags = payload.fetch(:tags)

          stats.send(metric.type, metric.name, value, tags: tags)
        end
      end
    rescue StandardError => err
      Logging.instance.error("metric sending failed: #{err.message}")
    end
  ensure
    dogstatsd.close
  end
end
REGISTER = 
proc do |accumulated_payload|
  dogapi = ::Dogapi::Client.new(Yabeda::Datadog.config.api_key, Yabeda::Datadog.config.app_key)

  accumulated_payload.each do |payload|
    metric = payload.fetch(:metric)

    begin
      ResponseHandler.call(metric) do
        metric.update(dogapi)
      end
    rescue StandardError => err
      Logging.instance.error("metric registration failed for #{metric.name}: #{err.message}")
    end
  end
end

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(queue) ⇒ Worker

Returns a new instance of Worker.



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# File 'lib/yabeda/datadog/worker.rb', line 21

def initialize(queue)
  @queue = queue
  @threads = []
end

Class Method Details

.start(config) ⇒ Object 



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# File 'lib/yabeda/datadog/worker.rb', line 10

def self.start(config)
  queue_size = config.queue_size
  num_threads = config.num_threads
  Logging.instance.info("start worker; queue size: #{queue_size}; threads #{num_threads} ")

  queue = SizedQueue.new(queue_size)
  instance = new(queue)
  instance.spawn_threads(num_threads)
  instance
end

Instance Method Details

#enqueue(action, payload) ⇒ Object 



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# File 'lib/yabeda/datadog/worker.rb', line 26

def enqueue(action, payload)
  queue.push([action, payload])
end

#spawn_threads(num_threads) ⇒ Object 



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# File 'lib/yabeda/datadog/worker.rb', line 30

def spawn_threads(num_threads)
  num_threads.times do
    threads << Thread.new do
      grouped_actions = Hash.new { |hash, key| hash[key] = [] }

      while running? || actions_left?
        batch_size = 0
        # wait for actions, blocks the current thread
        action_key, action_payload = wait_for_action
        if action_key
          grouped_actions[action_key].push(action_payload)
          batch_size += 1
        end

        # group a batch of actions
        while batch_size < Yabeda::Datadog.config.batch_size
          begin
            action_key, action_payload = dequeue_action
            grouped_actions[action_key].push(action_payload)
            batch_size += 1
          rescue ThreadError
            break # exit batch loop if we drain the queue
          end
        end

        # invoke actions in batches
        grouped_actions.each_pair do |group_key, group_payload|
          self.class.const_get(group_key, false).call(group_payload)
        end

        grouped_actions.clear
      end
    end
  end

  true
end

#spawned_threads_count ⇒ Object 



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# File 'lib/yabeda/datadog/worker.rb', line 68

def spawned_threads_count
  threads.size
end

#stop ⇒ Object 



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# File 'lib/yabeda/datadog/worker.rb', line 72

def stop
  Logging.instance.info("stop worker")
  queue.close
  threads.each(&:exit)
  threads.clear
  true
end