Class: Messaging::ConsumerSupervisor

Inherits:
Object
  • Object
show all
Includes:
Instrumentation
Defined in:
lib/messaging/consumer_supervisor.rb

Constant Summary

Constants included from Instrumentation

Instrumentation::NAMESPACE

Instance Method Summary collapse

Methods included from Instrumentation

#instrument, subscribe, unsubscribe

Constructor Details

#initialize ⇒ ConsumerSupervisor

Returns a new instance of ConsumerSupervisor.



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# File 'lib/messaging/consumer_supervisor.rb', line 6

def initialize
  @threads = Concurrent::Array.new
  Messaging.routes.define_consumers!
end

Instance Method Details

#consumers ⇒ Object 



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# File 'lib/messaging/consumer_supervisor.rb', line 47

def consumers
  Messaging.routes.consumers
end

#start ⇒ Object 



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# File 'lib/messaging/consumer_supervisor.rb', line 11

def start
  Concurrent.use_simple_logger
  Messaging.logger.info 'Consumers starting'
  @signal_to_stop = false
  @threads.clear
  @thread_pool = Concurrent::FixedThreadPool.new(consumers.size, auto_terminate: false)

  consumers.each do |consumer|
    @thread_pool.post do
      thread = Thread.current
      thread.abort_on_exception = true
      @threads << thread
      run_consumer(consumer)
    end
  end

  true
end

#status ⇒ Object 



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# File 'lib/messaging/consumer_supervisor.rb', line 43

def status
  consumers.map(&:log_current_status)
end

#stop ⇒ Object 



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# File 'lib/messaging/consumer_supervisor.rb', line 30

def stop
  return if @signal_to_stop

  instrument('consumer_supervisor.stop') do
    @signal_to_stop = true
    consumers.map { |consumer| Thread.new { consumer.stop } }.join
    @threads.select(&:alive?).each { |thread| thread&.wakeup }
    @thread_pool&.shutdown
    @thread_pool&.wait_for_termination(60)
    Messaging.logger.info 'Consumers stopped'
  end
end