Class: SnowplowTracker::AsyncEmitter

Inherits:
Emitter
  • Object
show all
Defined in:
lib/snowplow-tracker/emitters.rb

Instance Method Summary collapse

Methods inherited from Emitter

#input, #is_good_status_code, #send_requests

Constructor Details

#initialize(endpoint, config = {}) ⇒ AsyncEmitter

Returns a new instance of AsyncEmitter.



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# File 'lib/snowplow-tracker/emitters.rb', line 231

def initialize(endpoint, config={})
  @queue = Queue.new()
  # @all_processed_condition and @results_unprocessed are used to emulate Python's Queue.task_done()
  @queue.extend(MonitorMixin)
  @all_processed_condition = @queue.new_cond
  @results_unprocessed = 0
  (config[:thread_count] || 1).times do
    t = Thread.new do
      consume
    end
  end
  super(endpoint, config)
end

Instance Method Details

#consume ⇒ Object 



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# File 'lib/snowplow-tracker/emitters.rb', line 245

def consume
  loop do
    work_unit = @queue.pop
    send_requests(work_unit)
    @queue.synchronize do
      @results_unprocessed -= 1
      @all_processed_condition.broadcast
    end
  end
end

#flush(async = true) ⇒ Object

Flush the buffer

If async is false, block until the queue is empty



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# File 'lib/snowplow-tracker/emitters.rb', line 259

def flush(async=true)
  loop do
    @lock.synchronize do
      @queue.synchronize do
        @results_unprocessed += 1
      end
      @queue << @buffer
      @buffer = []
    end
    if not async
      LOGGER.info('Starting synchronous flush')
      @queue.synchronize do
        @all_processed_condition.wait_while { @results_unprocessed > 0 }
        LOGGER.info('Finished synchronous flush')
      end
    end
    break if @buffer.size < 1
  end
end