JRuby thread safety test with Asciidoctor PDF and Rouge

jruby-thread-safety-test.rb

require 'asciidoctor-pdf'
require 'java'
java_import 'java.util.concurrent.Callable'
java_import 'java.util.concurrent.FutureTask'
java_import 'java.util.concurrent.LinkedBlockingQueue'
java_import 'java.util.concurrent.ThreadPoolExecutor'
java_import 'java.util.concurrent.TimeUnit'

class App
  include Callable
  def call
    Asciidoctor.convert <<~'EOS', backend: 'pdf', safe: :safe
    :source-highlighter: rouge

    [source,yaml]
    ----
    runtime:
      cache_dir: ./.cache/antora
    site:
      title: Antora Docs
      url: https://docs.antora.org
      start_page: antora::index.adoc
      robots: allow
    content:
      sources:
      - url: https://gitlab.com/antora/antora.git
        start_path: docs
        branches: v2.2.x, v2.1.x, v2.0.x
      - url: https://gitlab.com/antora/antora-ui-default.git
        start_path: docs
        branches: master
    asciidoc:
      attributes:
        experimental: ''
        idprefix: ''
        idseparator: '-'
        linkattrs: ''
    ui:
      bundle:
        url: https://gitlab.com/antora/antora-ui-default/-/jobs/artifacts/master/raw/build/ui-bundle.zip?job=bundle-stable
        snapshot: true
      supplemental_files: ./supplemental-ui
    output:
      dir: ./public
    ----
    EOS
  end
end

executor = ThreadPoolExecutor.new 8, 8, 60, TimeUnit::SECONDS, LinkedBlockingQueue.new

num_tests = 32
num_threads = 8

num_tests.times do |i|
  tasks = []

  num_threads.times do
    task = FutureTask.new App.new
    executor.execute task
    tasks << task
  end

  tasks.each {|t| t.get }
end

executor.shutdown