Class: Sbmt::Outbox::V2::BoxProcessor

Inherits:
Object
  • Object
show all
Defined in:
lib/sbmt/outbox/v2/box_processor.rb

Direct Known Subclasses

Poller, Processor

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(boxes:, threads_count:, name: "abstract_worker", redis: nil) ⇒ BoxProcessor

Returns a new instance of BoxProcessor.



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# File 'lib/sbmt/outbox/v2/box_processor.rb', line 15

def initialize(boxes:, threads_count:, name: "abstract_worker", redis: nil)
  @threads_count = threads_count
  @worker_name = name

  @queue = build_task_queue(boxes)
  @thread_pool = ThreadPool.new(
    concurrency: threads_count,
    name: "#{name}_thread_pool"
  ) do
    queue.pop
  end

  @started = false

  init_redis(redis)
end

Instance Attribute Details

#started ⇒ Object (readonly)

Returns the value of attribute started.



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# File 'lib/sbmt/outbox/v2/box_processor.rb', line 13

def started
  @started
end

#threads_count ⇒ Object (readonly)

Returns the value of attribute threads_count.



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# File 'lib/sbmt/outbox/v2/box_processor.rb', line 13

def threads_count
  @threads_count
end

#worker_name ⇒ Object (readonly)

Returns the value of attribute worker_name.



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# File 'lib/sbmt/outbox/v2/box_processor.rb', line 13

def worker_name
  @worker_name
end

Instance Method Details

#alive?(timeout) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/sbmt/outbox/v2/box_processor.rb', line 79

def alive?(timeout)
  return false unless ready?

  @thread_pool.alive?(timeout)
end

#process_task(_worker_number, _task) ⇒ Object

Raises:

  • (NotImplementedError) 


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# File 'lib/sbmt/outbox/v2/box_processor.rb', line 97

def process_task(_worker_number, _task)
  raise NotImplementedError, "Implement #process_task for Sbmt::Outbox::V2::BoxProcessor"
end

#ready? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/sbmt/outbox/v2/box_processor.rb', line 75

def ready?
  started && @thread_pool.running?
end

#safe_process_task(worker_number, task) ⇒ Object 



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# File 'lib/sbmt/outbox/v2/box_processor.rb', line 85

def safe_process_task(worker_number, task)
  process_task(worker_number, task)
rescue => e
  log_fatal(e, task)
  track_fatal(e, task)
end

#start ⇒ Object 



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# File 'lib/sbmt/outbox/v2/box_processor.rb', line 32

def start
  raise "#{worker_name} is already started" if started
  @started = true

  thread_pool.start do |worker_number, scheduled_task|
    result = ThreadPool::PROCESSED
    last_result = Thread.current[:last_polling_result]

    throttling_res = throttle(worker_number, scheduled_task, last_result)
    next ThreadPool::SKIPPED if throttling_res&.value_or(nil) == Sbmt::Outbox::V2::Throttler::SKIP_STATUS

    lock_task(scheduled_task) do |locked_task|
      base_labels = scheduled_task.yabeda_labels.merge(worker_name: worker_name)
      if locked_task
        labels = base_labels.merge(locked_task.yabeda_labels)
        box_worker.job_execution_runtime.measure(labels) do
          ::Rails.application.executor.wrap do
            logger.with_tags(**locked_task.log_tags) do
              result = safe_process_task(worker_number, locked_task)
            end
          end
        end
      else
        result = ThreadPool::SKIPPED
      end

      box_worker.job_counter.increment(base_labels.merge(state: locked_task ? "processed" : "skipped"), by: 1)
    end

    Thread.current[:last_polling_result] = result || ThreadPool::PROCESSED
  ensure
    queue << scheduled_task
  end
rescue => e
  Outbox.error_tracker.error(e)
  raise
end

#stop ⇒ Object 



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# File 'lib/sbmt/outbox/v2/box_processor.rb', line 70

def stop
  @started = false
  @thread_pool.stop
end

#throttle(_worker_number, _scheduled_task, _result) ⇒ Object 



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# File 'lib/sbmt/outbox/v2/box_processor.rb', line 92

def throttle(_worker_number, _scheduled_task, _result)
  # noop by default
  # IMPORTANT: method is called from thread-pool, i.e. code must be thread-safe
end