Class: RubyReactor::Map::Dispatcher

Inherits:
Object
  • Object
show all
Extended by:
Helpers
Defined in:
lib/ruby_reactor/map/dispatcher.rb

Class Method Summary collapse

Methods included from Helpers

apply_collect_block, build_element_inputs, load_parent_context_from_storage, resolve_reactor_class, resume_parent_execution

Class Method Details

.dispatch_batch(source, arguments, parent_context, storage) ⇒ Object 



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# File 'lib/ruby_reactor/map/dispatcher.rb', line 63

def self.dispatch_batch(source, arguments, parent_context, storage)
  map_id = arguments[:map_id]
  reactor_class_name = arguments[:parent_reactor_class_name]

  # Fail Fast Check
  if arguments[:fail_fast]
    failed_context_id = storage.retrieve_map_failed_context_id(map_id, reactor_class_name)
    return if failed_context_id
  end

  batch_size = arguments[:batch_size] || source.size # Default to all if no batch_size (async=true only)

  # Atomically reserve a batch
  new_offset = storage.increment_map_offset(map_id, batch_size, reactor_class_name)
  current_offset = new_offset - batch_size

  batch_elements = if source.is_a?(Array)
                     source.slice(current_offset, batch_size) || []
                   elsif source.respond_to?(:offset) && source.respond_to?(:limit)
                     # Optimized for ActiveRecord and similar query builders
                     source.offset(current_offset).limit(batch_size).to_a
                   else
                     # Fallback for generic Enumerable
                     # This is inefficient for huge sets if not Array, but compliant
                     source.drop(current_offset).take(batch_size)
                   end

  return if batch_elements.empty?

  # Queue Jobs
  queue_options = {
    map_id: map_id,
    arguments: arguments,
    context: parent_context,
    reactor_class_info: resolve_reactor_class_info(arguments, parent_context),
    step_name: arguments[:step_name]
  }

  batch_elements.each_with_index do |element, i|
    absolute_index = current_offset + i
    queue_element_job(element, absolute_index, queue_options)
  end
end

.element_at(source, index) ⇒ Object 



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# File 'lib/ruby_reactor/map/dispatcher.rb', line 139

def self.element_at(source, index)
  if source.is_a?(Array)
    source[index]
  elsif source.respond_to?(:offset) && source.respond_to?(:limit)
    source.offset(index).limit(1).to_a.first
  else
    source.drop(index).first
  end
end

.initialize_map_metadata(arguments, storage) ⇒ Object 



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# File 'lib/ruby_reactor/map/dispatcher.rb', line 34

def self.initialize_map_metadata(arguments, storage)
  map_id = arguments[:map_id]
  reactor_class_name = arguments[:parent_reactor_class_name]

  # Reset or set initial offset. Use NX to act as a mutex/guard against duplicate initialization.
  storage.set_map_offset_if_not_exists(map_id, 0, reactor_class_name)
end

.perform(arguments) ⇒ Object 



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# File 'lib/ruby_reactor/map/dispatcher.rb', line 8

def self.perform(arguments)
  arguments = arguments.transform_keys(&:to_sym)
  parent_reactor_class_name = arguments[:parent_reactor_class_name]

  storage = RubyReactor.configuration.storage_adapter

  # Load parent context to resolve source
  parent_context = load_parent_context_from_storage(
    arguments[:parent_context_id],
    parent_reactor_class_name,
    storage
  )

  # Initialize metadata if first run
  initialize_map_metadata(arguments, storage) unless arguments[:continuation]

  # Resolve Source
  # We need to resolve the source to know what we are iterating.
  # Strict "Array Only" rule means we expect an Array-like object or we handle the
  # "Query Builder" result if user used it.
  source = resolve_source(arguments, parent_context)

  # Dispatch next batch
  dispatch_batch(source, arguments, parent_context, storage)
end

.queue_element_job(element, index, options) ⇒ Object 



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# File 'lib/ruby_reactor/map/dispatcher.rb', line 149

def self.queue_element_job(element, index, options)
  arguments = options[:arguments]
  context = options[:context]

  # Resolve mappings
  mappings_template = arguments[:argument_mappings]

  # Fallback: look up from step config if missing (e.g. called from ElementExecutor)
  if mappings_template.nil? && context
    step_name = options[:step_name] || arguments[:step_name]
    step_config = context.reactor_class.steps[step_name.to_sym]
    mappings_template = step_config.arguments[:argument_mappings]
  end

  mappings = if mappings_template.respond_to?(:resolve)
               mappings_template.resolve(context)
             else
               mappings_template || {}
             end

  # Fix for weird structure observed in fallback (wrapped in :source -> Template::Value)
  if mappings.key?(:source) && mappings[:source].respond_to?(:value) && mappings[:source].value.is_a?(Hash)
    mappings = mappings[:source].value
  end

  mapped_inputs = build_element_inputs(mappings, context, element)
  serialized_inputs = ContextSerializer.serialize_value(mapped_inputs)

  RubyReactor.configuration.async_router.perform_map_element_async(
    map_id: options[:map_id],
    element_id: "#{options[:map_id]}:#{index}",
    index: index,
    serialized_inputs: serialized_inputs,
    reactor_class_info: options[:reactor_class_info],
    strict_ordering: arguments[:strict_ordering],
    parent_context_id: context.context_id,
    parent_reactor_class_name: context.reactor_class.name,
    step_name: options[:step_name].to_s,
    batch_size: arguments[:batch_size], # Passed to worker so it knows to trigger next batch?
    fail_fast: arguments[:fail_fast]
  )
end

.requeue_index(map_meta, index) ⇒ Object

Re-dispatch a SPECIFIC index whose result slot is missing (Phase 5c, used by the map sweeper). Index-driven rather than offset-driven: resolve the source from the stored parent context and pick source. Idempotent because store_map_result HSETs by index — a re-run overwrites slot ‘index`, never duplicates.



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# File 'lib/ruby_reactor/map/dispatcher.rb', line 112

def self.requeue_index(map_meta, index)
  storage = RubyReactor.configuration.storage_adapter
  parent_class_name = map_meta["parent_reactor_class_name"]
  parent_context = load_parent_context_from_storage(map_meta["parent_context_id"], parent_class_name, storage)

  arguments = {
    map_id: map_meta["map_id"],
    step_name: map_meta["step_name"],
    strict_ordering: map_meta["strict_ordering"],
    parent_context_id: map_meta["parent_context_id"],
    parent_reactor_class_name: parent_class_name,
    fail_fast: map_meta["fail_fast"],
    batch_size: map_meta["batch_size"]
  }

  source = resolve_source(arguments, parent_context)
  element = element_at(source, index)

  queue_element_job(element, index, {
                      map_id: map_meta["map_id"],
                      arguments: arguments,
                      context: parent_context,
                      reactor_class_info: map_meta["reactor_class_info"],
                      step_name: map_meta["step_name"]
                    })
end

.resolve_reactor_class_info(arguments, context) ⇒ Object 



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# File 'lib/ruby_reactor/map/dispatcher.rb', line 192

def self.resolve_reactor_class_info(arguments, context)
  mapped_reactor_class = arguments[:mapped_reactor_class]
  step_name = arguments[:step_name]

  if mapped_reactor_class.respond_to?(:name)
    { "type" => "class", "name" => mapped_reactor_class.name }
  else
    { "type" => "inline", "parent" => context.reactor_class.name, "step" => step_name.to_s }
  end
end

.resolve_source(arguments, context) ⇒ Object 



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# File 'lib/ruby_reactor/map/dispatcher.rb', line 42

def self.resolve_source(arguments, context)
  # Arguments has :source which is a Template::Input or similar.
  # We need to resolve it against the context.
  source_template = arguments[:source]

  # Fallback: look up from step config if missing (e.g. called from ElementExecutor)
  if source_template.nil? && context
    step_name = arguments[:step_name]
    step_config = context.reactor_class.steps[step_name.to_sym]
    source_template = step_config.arguments[:source][:source]
  end

  # If source is packaged in arguments as a value (deserialized)
  return source_template if source_template.is_a?(Array)

  # Resolve template
  return source_template.resolve(context) if source_template.respond_to?(:resolve)

  source_template
end