Class: SolidObjects::Executor

Inherits:
Object
  • Object
show all
Defined in:
lib/solid_objects/executor.rb,
sig/generated/lib/solid_objects/executor.rbs

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(activation:, message:) ⇒ Executor

Returns a new instance of Executor.

RBS:

  • (activation: Activation, message: Message) -> void

Parameters:



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# File 'lib/solid_objects/executor.rb', line 9

def initialize(activation:, message:)
  @activation = activation
  @message = message
end

Instance Attribute Details

#activation ⇒ Object (readonly)

Returns the value of attribute activation.

Returns:

  • (Object) 


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# File 'lib/solid_objects/executor.rb', line 45

def activation
  @activation
end

#message ⇒ Object (readonly)

Returns the value of attribute message.

Returns:

  • (Object) 


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# File 'lib/solid_objects/executor.rb', line 45

def message
  @message
end

Instance Method Details

#actor ⇒ Actor

RBS:

  • () -> Actor

Returns:



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# File 'lib/solid_objects/executor.rb', line 48

def actor
  activation.actor
end

#call ⇒ Boolean

RBS:

  • () -> bool

Returns:

  • (Boolean) 


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# File 'lib/solid_objects/executor.rb', line 15

def call
  state_before = actor.state.to_h
  observables_before = actor.observable_values
  message_context = MessageContext.new(
    id: message.id,
    attempt: message.attempt_count,
    enqueued_at: message.enqueued_at,
    idempotency_key: message.idempotency_key,
    request_id: message.request_id
  )

  SolidObjects.instrument(:"message.started", **instrumentation_payload)
  result = Context.with(actor:, message: message_context) do
    actor.invoke(message.message_name, message.arguments)
  end
  ensure_query_did_not_mutate_state!(state_before)
  observable_changes = changed_observables(observables_before, actor.observable_values)
  complete(result, observable_changes)
  true
rescue LostActivation
  raise
rescue => error
  activation.restore_state(state_before) if state_before
  actor.discard_intents
  fail_message(error)
  false
end

#changed_observables(before, after) ⇒ Hash[String, untyped]

RBS:

  • (Hash[String, untyped], Hash[String, untyped]) -> Hash[String, untyped]

Parameters:

  • (Hash[String, untyped])
  • (Hash[String, untyped])

Returns:

  • (Hash[String, untyped]) 


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# File 'lib/solid_objects/executor.rb', line 62

def changed_observables(before, after)
  after.each_with_object({}) do |(name, value), changes|
    changes[name] = value unless before[name] == value
  end
end

#complete(result, observable_changes) ⇒ void

This method returns an undefined value.

RBS:

  • (untyped, Hash[String, untyped]) -> void

Parameters:

  • (Object)
  • (Hash[String, untyped]) 


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# File 'lib/solid_objects/executor.rb', line 69

def complete(result, observable_changes)
  serialized_state = Serialization.dump(
    actor.state.to_h,
    max_bytes: SolidObjects.configuration.max_state_bytes
  )
  serialized_result = Serialization.dump(
    (message.message_kind == "ask") ? result : nil,
    max_bytes: SolidObjects.configuration.max_result_bytes
  )
  effect_intents = actor.drain_effect_intents
  reminder_intents = actor.drain_reminder_intents
  outbound_message_intents = actor.drain_outbound_message_intents
  enqueued_effects = []

  activation.lease.fenced_transaction do |instance|
    claimed_message = matching_claim!
    locked_message = Message.lock.find(message.id)
    instance.update!(
      state: serialized_state,
      state_version: actor.class.state_version,
      last_used_at: SolidObjects.database_adapter.database_now
    )
    locked_message.update!(
      result: serialized_result,
      error: nil,
      completed_at: SolidObjects.database_adapter.database_now
    )
    enqueued_effects.concat(enqueue_effects(locked_message, instance, effect_intents))
    schedule_reminders(instance, reminder_intents)
    enqueued_effects.concat(
      enqueue_actor_messages(locked_message, instance, outbound_message_intents)
    )
    enqueue_broadcasts(locked_message, instance, observable_changes)
    claimed_message.destroy!
  end

  observable_changes.each_key do |observable_name|
    SolidObjects.instrument(
      :"broadcast.enqueued",
      **instrumentation_payload,
      observable_name:
    )
  end
  enqueued_effects.each do |effect|
    SolidObjects.instrument(
      :"effect.enqueued",
      effect_id: effect.effect_id,
      effect_name: effect.name,
      message_id: effect.message_id,
      actor_type: message.actor_type,
      actor_id: message.actor_id
    )
  end
  SolidObjects.instrument(:"message.completed", **instrumentation_payload)
  SolidObjects.wake_up.signal
end

#create_dead_letter(locked_message, error_details, now) ⇒ DeadLetter

RBS:

  • (Message, Hash[String, untyped], Time) -> DeadLetter

Parameters:

  • (Message)
  • (Hash[String, untyped])
  • (Time)

Returns:



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# File 'lib/solid_objects/executor.rb', line 261

def create_dead_letter(locked_message, error_details, now)
  DeadLetter.create!(
    message: locked_message,
    instance: locked_message.instance,
    actor_type: locked_message.actor_type,
    actor_id: locked_message.actor_id,
    message_name: locked_message.message_name,
    arguments: locked_message.arguments,
    attempts: locked_message.attempt_count,
    exception_class: error_details.fetch("class"),
    exception_message: error_details.fetch("message"),
    backtrace: error_details.fetch("backtrace"),
    first_failed_at: locked_message.last_failed_at || now,
    last_failed_at: now
  )
end

#enqueue_actor_messages(locked_message, instance, intents) ⇒ Array[Effect]

RBS:

  • (Message, Instance, Array[Actor::OutboundMessageIntent]) -> Array[Effect]

Parameters:

Returns:



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# File 'lib/solid_objects/executor.rb', line 165

def enqueue_actor_messages(locked_message, instance, intents)
  intents.map do |intent|
    Effect.create!(
      message: locked_message,
      instance:,
      effect_id: SecureRandom.uuid,
      name: EffectExecutor::ACTOR_MESSAGE_EFFECT,
      arguments: {
        "actor_type" => intent.actor_type,
        "actor_id" => intent.actor_id,
        "message_name" => intent.message_name,
        "arguments" => intent.arguments,
        "available_at" => intent.available_at&.iso8601(6),
        "idempotency_key" => intent.idempotency_key
      },
      status: "pending",
      max_attempts: SolidObjects.configuration.max_attempts,
      available_at: SolidObjects.database_adapter.database_now
    )
  end
end

#enqueue_broadcasts(locked_message, instance, observable_changes) ⇒ void

This method returns an undefined value.

RBS:

  • (Message, Instance, Hash[String, untyped]) -> void

Parameters:



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# File 'lib/solid_objects/executor.rb', line 188

def enqueue_broadcasts(locked_message, instance, observable_changes)
  observable_changes.each do |observable_name, value|
    Broadcast.create!(
      message: locked_message,
      instance:,
      broadcast_id: SecureRandom.uuid,
      observable_name:,
      value:,
      state_version: actor.class.state_version,
      activation_generation: activation.lease.generation,
      status: "pending",
      available_at: SolidObjects.database_adapter.database_now
    )
  end
end

#enqueue_effects(locked_message, instance, intents) ⇒ Array[Effect]

RBS:

  • (Message, Instance, Array[Actor::EffectIntent]) -> Array[Effect]

Parameters:

Returns:



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# File 'lib/solid_objects/executor.rb', line 127

def enqueue_effects(locked_message, instance, intents)
  intents.map do |intent|
    Effect.create!(
      message: locked_message,
      instance:,
      effect_id: SecureRandom.uuid,
      name: intent.name,
      arguments: intent.arguments,
      success_message_name: intent.success_message_name,
      failure_message_name: intent.failure_message_name,
      status: "pending",
      max_attempts: SolidObjects.configuration.max_attempts,
      available_at: SolidObjects.database_adapter.database_now
    )
  end
end

#ensure_query_did_not_mutate_state!(state_before) ⇒ void

This method returns an undefined value.

RBS:

  • (Hash[String, untyped]) -> void

Parameters:

  • (Hash[String, untyped]) 


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# File 'lib/solid_objects/executor.rb', line 53

def ensure_query_did_not_mutate_state!(state_before)
  return unless message.message_kind == "ask"
  return unless actor.class.definition.queries.key?(message.message_name.to_sym)
  return if actor.state.to_h == state_before

  raise InvalidActor, "query #{message.message_name.inspect} mutated actor state"
end

#fail_message(error) ⇒ void

This method returns an undefined value.

RBS:

  • (Exception) -> void

Parameters:

  • (Exception) 


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# File 'lib/solid_objects/executor.rb', line 205

def fail_message(error)
  error_details = serialized_error(error)
  dead = false

  activation.lease.fenced_transaction do
    claimed_message = matching_claim!
    locked_message = Message.lock.find(message.id)
    now = SolidObjects.database_adapter.database_now
    locked_message.update!(error: error_details, last_failed_at: now)
    claimed_message.destroy!

    if locked_message.attempt_count >= locked_message.max_attempts
      create_dead_letter(locked_message, error_details, now)
      dead = true
    else
      ReadyMessage.create!(
        message: locked_message,
        instance: locked_message.instance,
        sequence: locked_message.sequence,
        available_at: now + SolidObjects.configuration.retry_delay.call(locked_message.attempt_count)
      )
    end
  end

  SolidObjects.instrument(
    :"message.failed",
    **instrumentation_payload,
    error_class: error.class.name,
    dead:
  )
  SolidObjects.wake_up.signal
end

#instrumentation_payload ⇒ Hash[Symbol, untyped]

RBS:

  • () -> Hash[Symbol, untyped]

Returns:

  • (Hash[Symbol, untyped]) 


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# File 'lib/solid_objects/executor.rb', line 279

def instrumentation_payload
  {
    message_id: message.id,
    actor_type: message.actor_type,
    actor_id: message.actor_id,
    sequence: message.sequence,
    attempt: message.attempt_count,
    request_id: message.request_id
  }
end

#matching_claim! ⇒ ClaimedMessage

RBS:

  • () -> ClaimedMessage

Returns:



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# File 'lib/solid_objects/executor.rb', line 239

def matching_claim!
  ClaimedMessage.lock.find_by!(
    message_id: message.id,
    process_id: activation.lease.owner_id,
    activation_generation: activation.lease.generation
  )
rescue ActiveRecord::RecordNotFound
  raise LostActivation, "message claim changed"
end

#schedule_reminders(instance, intents) ⇒ void

This method returns an undefined value.

RBS:

  • (Instance, Array[Actor::ReminderIntent]) -> void

Parameters:



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# File 'lib/solid_objects/executor.rb', line 145

def schedule_reminders(instance, intents)
  intents.each do |intent|
    reminder = Reminder.find_or_initialize_by(instance:, name: intent.name)
    reminder.assign_attributes(
      actor_type: instance.actor_type,
      actor_id: instance.actor_id,
      message_name: intent.name,
      arguments: intent.arguments,
      next_run_at: intent.at,
      interval_seconds: intent.interval_seconds,
      missed_policy: intent.missed_policy,
      status: "scheduled",
      claimed_by: nil,
      claimed_at: nil
    )
    reminder.save!
  end
end

#serialized_error(error) ⇒ Hash[String, untyped]

RBS:

  • (Exception) -> Hash[String, untyped]

Parameters:

  • (Exception)

Returns:

  • (Hash[String, untyped]) 


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# File 'lib/solid_objects/executor.rb', line 250

def serialized_error(error)
  Serialization.dump(
    {
      "class" => error.class.name,
      "message" => error.message.to_s.byteslice(0, 8_192),
      "backtrace" => Array(error.backtrace).first(50)
    }
  )
end