Module: Legion::Extensions

Defined in:
lib/legion/extensions.rb,
lib/legion/extensions/core.rb,
lib/legion/extensions/data.rb,
lib/legion/extensions/transport.rb,
lib/legion/extensions/actors/base.rb,
lib/legion/extensions/actors/loop.rb,
lib/legion/extensions/actors/once.rb,
lib/legion/extensions/actors/poll.rb,
lib/legion/extensions/helpers/lex.rb,
lib/legion/extensions/actors/every.rb,
lib/legion/extensions/helpers/base.rb,
lib/legion/extensions/helpers/core.rb,
lib/legion/extensions/helpers/task.rb,
lib/legion/extensions/builders/base.rb,
lib/legion/extensions/actors/nothing.rb,
lib/legion/extensions/helpers/logger.rb,
lib/legion/extensions/builders/actors.rb,
lib/legion/extensions/builders/helpers.rb,
lib/legion/extensions/builders/runners.rb,
lib/legion/extensions/helpers/transport.rb,
lib/legion/extensions/actors/subscription.rb

Defined Under Namespace

Modules: Actors, Builder, Core, Data, Helpers, Transport

Class Method Summary collapse

Class Method Details

.find_extensions ⇒ Object 



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# File 'lib/legion/extensions.rb', line 149

def find_extensions
  @extensions ||= {}
  Gem::Specification.all_names.each do |gem|
    next unless gem[0..3] == 'lex-'

    lex = gem.split('-')
    @extensions[lex[1]] = { full_gem_name:   gem,
                            gem_name:        "lex-#{lex[1]}",
                            extension_name:  lex[1],
                            version:         lex[2],
                            extension_class: "Legion::Extensions::#{lex[1].capitalize}" }
  end
end

.gem_load(gem_name, name) ⇒ Object 



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# File 'lib/legion/extensions.rb', line 138

def gem_load(gem_name, name)
  gem_path = "#{Gem::Specification.find_by_name(gem_name).gem_dir}/lib/legion/extensions/#{name}"
  require gem_path
  true
rescue LoadError => e
  Legion::Logging.error e.message
  Legion::Logging.error e.backtrace
  Legion::Logging.error "gem_path: #{gem_path}" unless gem_path.nil?
  false
end

.hook_actor(extension:, extension_name:, actor_class:, size: 1, **opts) ⇒ Object 



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# File 'lib/legion/extensions.rb', line 89

def hook_actor(extension:, extension_name:, actor_class:, size: 1, **opts)
  size = if Legion::Settings[:extensions].key?(extension_name.to_sym) && Legion::Settings[:extensions][extension_name.to_sym].key?(:workers)
           Legion::Settings[:extensions][extension_name.to_sym][:workers]
         elsif size.is_a? Integer
           size
         else
           1
         end

  extension_hash = {
    extension:       extension,
    extension_name:  extension_name,
    actor_class:     actor_class,
    size:            size,
    fallback_policy: :abort,
    **opts
  }
  extension_hash[:running_class] = if actor_class.ancestors.include? Legion::Extensions::Actors::Subscription
                                     actor_class
                                   else
                                     actor_class.new
                                   end

  if actor_class.ancestors.include? Legion::Extensions::Actors::Every
    @timer_tasks.push(extension_hash)
  elsif actor_class.ancestors.include? Legion::Extensions::Actors::Once
    @once_tasks.push(extension_hash)
  elsif actor_class.ancestors.include? Legion::Extensions::Actors::Loop
    @loop_tasks.push(extension_hash)
  elsif actor_class.ancestors.include? Legion::Extensions::Actors::Poll
    @poll_tasks.push(extension_hash)
  elsif actor_class.ancestors.include? Legion::Extensions::Actors::Subscription
    extension_hash[:threadpool] = Concurrent::FixedThreadPool.new(size)
    size.times do
      extension_hash[:threadpool].post do
        klass = actor_class.new
        if klass.respond_to?(:async)
          klass.async.subscribe
        else
          klass.subscribe
        end
      end
    end
    @subscription_tasks.push(extension_hash)
  else
    Legion::Logging.fatal 'did not match any actor classes'
  end
end

.hook_extensions ⇒ Object 



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# File 'lib/legion/extensions.rb', line 11

def hook_extensions
  @timer_tasks = []
  @loop_tasks = []
  @once_tasks = []
  @poll_tasks = []
  @subscription_tasks = []
  @actors = []

  find_extensions
  load_extensions
end

.load_extension(extension, values) ⇒ Object 



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# File 'lib/legion/extensions.rb', line 61

def load_extension(extension, values)
  return unless gem_load(values[:gem_name], extension)

  extension = Kernel.const_get(values[:extension_class])
  has_logger = extension.respond_to?(:log)
  extension.autobuild

  require 'legion/transport/messages/lex_register'
  Legion::Transport::Messages::LexRegister.new(function: 'save', opts: extension.runners).publish

  if extension.respond_to?(:meta_actors) && extension.meta_actors.is_a?(Array)
    extension.meta_actors.each do |_key, actor|
      extension.log.debug("hooking meta actor: #{actor}") if has_logger
      hook_actor(**actor)
    end
  end

  extension.actors.each do |_key, actor|
    extension.log.debug("hooking literal actor: #{actor}") if has_logger
    hook_actor(**actor)
  end
  extension.log.info "Loaded v#{extension::VERSION}"
rescue StandardError => e
  Legion::Logging.error e.message
  Legion::Logging.error e.backtrace
  false
end

.load_extensions ⇒ Object 



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# File 'lib/legion/extensions.rb', line 39

def load_extensions
  @extensions ||= {}
  @loaded_extensions ||= []
  @extensions.each do |extension, values|
    if values.key(:enabled) && !values[:enabled]
      Legion::Logging.info "Skipping #{extension} because it's disabled"
      next
    end

    if Legion::Settings[:extensions].key?(extension.to_sym) && Legion::Settings[:extensions][extension.to_sym].key?(:enabled) && !Legion::Settings[:extensions][extension.to_sym][:enabled] # rubocop:disable Layout/LineLength
      next
    end

    unless load_extension(extension, values)
      Legion::Logging.warn("#{extension} failed to load")
      next
    end
    @loaded_extensions.push(extension)
  end
  Legion::Logging.info "#{@extensions.count} extensions loaded with subscription:#{@subscription_tasks.count},every:#{@timer_tasks.count},poll:#{@poll_tasks.count},once:#{@once_tasks.count},loop:#{@loop_tasks.count}"
end

.setup ⇒ Object 



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# File 'lib/legion/extensions.rb', line 7

def setup
  hook_extensions
end

.shutdown ⇒ Object 



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# File 'lib/legion/extensions.rb', line 23

def shutdown
  return nil if @loaded_extensions.nil?

  @subscription_tasks.each do |task|
    task[:threadpool].shutdown
    task[:threadpool].kill unless task[:threadpool].wait_for_termination(5)
  end

  @loop_tasks.each { |task| task[:running_class].cancel if task[:running_class].respond_to?(:cancel) }
  @once_tasks.each { |task| task[:running_class].cancel if task[:running_class].respond_to?(:cancel) }
  @timer_tasks.each { |task| task[:running_class].cancel if task[:running_class].respond_to?(:cancel) }
  @poll_tasks.each { |task| task[:running_class].cancel if task[:running_class].respond_to?(:cancel) }

  Legion::Logging.info 'Successfully shut down all actors'
end