Class: StateMachines::AsyncMode::AsyncTransitionCollection

Inherits:
TransitionCollection show all
Defined in:
lib/state_machines/async_mode/async_transition_collection.rb

Overview

Async-aware transition collection that can execute transitions concurrently

Instance Attribute Summary

Attributes inherited from TransitionCollection

#options, #skip_actions, #skip_after, #use_transactions

Instance Method Summary collapse

Methods inherited from TransitionCollection

#initialize, #perform

Constructor Details

This class inherits a constructor from StateMachines::TransitionCollection

Instance Method Details

#perform_async(&block) ⇒ Object

Performs transitions asynchronously using Async Provides better concurrency for I/O-bound operations



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# File 'lib/state_machines/async_mode/async_transition_collection.rb', line 21

def perform_async(&block)
  reset

  unless defined?(::Async::Task) && ::Async::Task.current?
    return Async do
      perform_async(&block)
    end.wait
  end

  if valid?
    # Create async tasks for each transition
    tasks = map do |transition|
      Async do
        if use_event_attributes? && !block_given?
          transition.transient = true
          transition.machine.write_safely(object, :event_transition, transition)
          run_actions
          transition
        else
          within_transaction do
            catch(:halt) { run_callbacks(&block) }
            rollback unless success?
          end
          transition
        end
      end
    end

    # Wait for all tasks to complete
    completed_transitions = []
    tasks.each do |task|
      begin
        result = task.wait
        completed_transitions << result if result
      rescue StandardError => e
        # Handle individual transition failures
        rollback
        raise AsyncTransitionError.new(object, map(&:machine), [e.message])
      end
    end

    # Check if all transitions succeeded
    @success = completed_transitions.length == length
  end

  success?
end

#perform_threaded(&block) ⇒ Object

Performs transitions concurrently using threads Better for CPU-bound operations but requires more careful synchronization



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# File 'lib/state_machines/async_mode/async_transition_collection.rb', line 71

def perform_threaded(&block)
  reset

  if valid?
    # Use basic thread approach
    threads = []
    results = []
    results_mutex = Concurrent::ReentrantReadWriteLock.new

    each do |transition|
      threads << Thread.new do
        begin
          result = if use_event_attributes? && !block_given?
                    transition.transient = true
                    transition.machine.write_safely(object, :event_transition, transition)
                    run_actions
                    transition
                  else
                    within_transaction do
                      catch(:halt) { run_callbacks(&block) }
                      rollback unless success?
                    end
                    transition
                  end

          results_mutex.with_write_lock { results << result }
        rescue StandardError => e
          # Handle individual transition failures
          rollback
          raise AsyncTransitionError.new(object, [transition.machine], [e.message])
        end
      end
    end

    # Wait for all threads to complete
    threads.each(&:join)
    @success = results.length == length
  end

  success?
end