Module: CMDx::Executors::Thread Private

Extended by:
Thread
Included in:
Thread
Defined in:
lib/cmdx/executors/thread.rb

Overview

This module is part of a private API. You should avoid using this module if possible, as it may be removed or be changed in the future.

Default executor. Uses a fixed-size ‘Thread` pool drained via a `Queue`; sentinel `nil`s terminate workers. Workers inherit the parent’s chain via fiber-local storage. Exceptions raised inside ‘on_job` are captured per worker and re-raised on the main thread once every worker has joined, so callers see failures instead of silently dropped jobs.

Instance Method Summary collapse

Instance Method Details

#call(jobs:, concurrency:, on_job:) ⇒ void

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

This method returns an undefined value.

Parameters:

  • jobs (Array) —

    opaque job objects forwarded to ‘on_job`

  • concurrency (Integer) —

    worker count (must be >= 1)

  • on_job (#call) —

    unary callable invoked per job

Raises:

  • (ArgumentError) —

    when ‘concurrency` is not a positive Integer

  • (StandardError) —

    re-raises the first exception captured from any worker



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# File 'lib/cmdx/executors/thread.rb', line 22

def call(jobs:, concurrency:, on_job:)
  raise ArgumentError, "executor concurrency must be a positive Integer (got #{concurrency.inspect})" unless concurrency.is_a?(Integer) && concurrency.positive?

  queue  = Queue.new
  errors = Queue.new

  jobs.each { |job| queue << job }
  concurrency.times { queue << nil }

  workers = Array.new(concurrency) do
    ::Thread.new do
      while (job = queue.pop)
        begin
          on_job.call(job)
        rescue StandardError => e
          errors << e
        end
      end
    end
  end

  workers.each(&:join)

  raise errors.pop unless errors.empty?
end