Class: Cuetip::WorkerGroup

Inherits:
Object
  • Object
show all
Includes:
ActiveSupport::Callbacks
Defined in:
lib/cuetip/worker_group.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(quantity, queues) ⇒ WorkerGroup

Returns a new instance of WorkerGroup.



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# File 'lib/cuetip/worker_group.rb', line 16

def initialize(quantity, queues)
  @quantity = quantity
  @queues = queues || []
  @workers = {}
  @threads = {}
end

Instance Attribute Details

#quantity ⇒ Object (readonly)

Returns the value of attribute quantity.



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# File 'lib/cuetip/worker_group.rb', line 12

def quantity
  @quantity
end

#threads ⇒ Object (readonly)

Returns the value of attribute threads.



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# File 'lib/cuetip/worker_group.rb', line 14

def threads
  @threads
end

#workers ⇒ Object (readonly)

Returns the value of attribute workers.



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# File 'lib/cuetip/worker_group.rb', line 13

def workers
  @workers
end

Instance Method Details

#set_process_name ⇒ Object 



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# File 'lib/cuetip/worker_group.rb', line 56

def set_process_name
  thread_names = @workers.values.map(&:status)
  Process.setproctitle("Cuetip: #{thread_names.inspect}")
end

#start ⇒ Object 



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# File 'lib/cuetip/worker_group.rb', line 23

def start
  Klogger.tagged(pid: Process.pid) do
    Cuetip.logger.info "Starting workers", quantity: @quantity
    if @queues.any?
      @queues.each { |q| Cuetip.logger.info "Joined queue", queue: q }
    end

    exit_trap = proc do
      @workers.each { |_, worker| worker.request_exit! }
      puts 'Exiting...'
    end

    trap('INT', &exit_trap)
    trap('TERM', &exit_trap)

    run_callbacks :run_worker_group do
      @quantity.times do |i|
        @workers[i] = Worker.new(self, i, @queues)
        Klogger.tagged worker_index: i do
          Cuetip.logger.info "Starting worker"
          @threads[i] = Thread.new(@workers[i]) do |worker|
            run_callbacks :run_worker do
              worker.run
            end
          end
        end
        @threads[i].abort_on_exception = true
      end
      @threads.values.each(&:join)
    end
  end
end