Class: AWS::Flow::AsyncDecider
- Inherits:
-
Object
- Object
- AWS::Flow::AsyncDecider
- Includes:
- Utilities::SelfMethods
- Defined in:
- lib/aws/decider/async_decider.rb
Overview
Represents an asynchronous decider class.
Instance Attribute Summary collapse
-
#decision_helper ⇒ Object
Returns the value of attribute decision_helper.
-
#task_token ⇒ Object
Returns the value of attribute task_token.
Instance Method Summary collapse
-
#complete_workflow ⇒ Object
Registers a ‘CompleteWorkflowExecution` decision.
-
#completed? ⇒ true, false
Indicates whether the task completed.
-
#continue_as_new_workflow(decision_id, continue_as_new_options) ⇒ Object
Continues this as a new workflow, using the provided decision and options.
- #decide ⇒ Object private
- #decide_impl ⇒ Object private
- #event_loop(event) ⇒ Object private
- #get_decisions ⇒ Object private
-
#handle_activity_task_cancel_requested(event) ⇒ Object
Handler for the ‘:ActivityTaskCancelRequested` event.
-
#handle_activity_task_scheduled(event) ⇒ Object
Handler for the ‘:ActivityTaskScheduled` event.
-
#handle_cancel_timer_failed(event) ⇒ Object
Handler for the ‘:CancelTimerFailed` event.
-
#handle_cancel_workflow_execution_failed(event) ⇒ Object
Handler for the ‘:CancelWorkflowExecutionFailed` event.
- #handle_closing_failure ⇒ Object
-
#handle_complete_workflow_execution_failed(event) ⇒ Object
Handler for the ‘:CompleteWorkflowExecutionFailed` event.
-
#handle_continue_as_new_workflow_execution_failed(event) ⇒ Object
Handler for the ‘:ContinueAsNewWorkflowExecutionFailed` event.
-
#handle_fail_workflow_execution_failed(event) ⇒ Object
Handler for the ‘:FailWorkflowExecutionFailed` event.
-
#handle_request_cancel_activity_task_failed(event) ⇒ Object
Handler for the ‘:RequestCancelActivityTaskFailed` event.
-
#handle_request_cancel_external_workflow_execution_failed(event) ⇒ Object
Handler for the ‘:RequestCancelExternalWorkflowExecutionFailed` event.
-
#handle_request_cancel_external_workflow_execution_initiated(event) ⇒ Object
Handler for the ‘:RequestCancelExternalWorkflowExecutionInitiated` event.
-
#handle_signal_external_workflow_execution_initiated(event) ⇒ Object
Handler for the ‘:SignalExternalWorkflowExecutionInitiated` event.
-
#handle_start_child_workflow_execution_initiated(event) ⇒ Object
Handler for the ‘:StartChildWorkflowExecutionInitiated` event.
-
#handle_start_timer_failed(event) ⇒ Object
Handler for the ‘:StartTimerFailed` event.
-
#handle_timer_canceled(event) ⇒ Object
Handler for the ‘:TimerCanceled` event.
-
#handle_timer_fired(event) ⇒ Object
Handler for the ‘:TimerFired` event.
-
#handle_timer_started(event) ⇒ Object
Handler for the ‘:TimerStarted` event.
-
#handle_workflow_execution_cancel_requested(event) ⇒ Object
Handler for the ‘:WorkflowExecutionCancelRequested` event.
-
#handle_workflow_execution_signaled(event) ⇒ Object
Handler for the ‘WorkflowExecutionSignaled` event.
-
#handle_workflow_execution_started(event) ⇒ Object
Handler for the ‘:WorkflowExecutionStarted` event.
-
#initialize(workflow_definition_factory, history_helper, decision_helper) ⇒ AsyncDecider
constructor
Creates a new asynchronous decider.
- #make_cancel_decision(decision_id) ⇒ Object
- #make_completion_decision(decision_id, decision) ⇒ Object
-
#make_fail_decision(decision_id, failure) ⇒ Object
failing in this execution.
-
#process_event(event) ⇒ Object
Processes decider events.
Methods included from Utilities::SelfMethods
Constructor Details
#initialize(workflow_definition_factory, history_helper, decision_helper) ⇒ AsyncDecider
Creates a new asynchronous decider.
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# File 'lib/aws/decider/async_decider.rb', line 193 def initialize(workflow_definition_factory, history_helper, decision_helper) @workflow_definition_factory = workflow_definition_factory @history_helper = history_helper @decision_helper = decision_helper @decision_task = history_helper.get_decision_task @workflow_clock = WorkflowClock.new(@decision_helper) @workflow_context = WorkflowContext.new(@decision_task, @workflow_clock) @activity_client = GenericActivityClient.new(@decision_helper, nil) @workflow_client = GenericWorkflowClient.new(@decision_helper, @workflow_context) @decision_context = DecisionContext.new(@activity_client, @workflow_client, @workflow_clock, @workflow_context, @decision_helper) end |
Instance Attribute Details
#decision_helper ⇒ Object
Returns the value of attribute decision_helper.
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# File 'lib/aws/decider/async_decider.rb', line 190 def decision_helper @decision_helper end |
#task_token ⇒ Object
Returns the value of attribute task_token.
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# File 'lib/aws/decider/async_decider.rb', line 190 def task_token @task_token end |
Instance Method Details
#complete_workflow ⇒ Object
Registers a ‘CompleteWorkflowExecution` decision.
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# File 'lib/aws/decider/async_decider.rb', line 337 def complete_workflow return unless @completed && ! @unhandled_decision decision_id = [:SELF, nil] if @failure @decision_helper[decision_id] = make_fail_decision(decision_id, @failure) elsif @cancel_requested @decision_helper[decision_id] = make_cancel_decision(decision_id) else if ! @workflow_context..nil? @decision_helper[decision_id] = continue_as_new_workflow(decision_id, @workflow_context.) else if @result.nil? @decision_helper[decision_id] = make_completion_decision(decision_id, { :decision_type => "CompleteWorkflowExecution"}) else @decision_helper[decision_id] = make_completion_decision(decision_id, { :decision_type => "CompleteWorkflowExecution", :complete_workflow_execution_decision_attributes => {:result => @result.get}}) end end end end |
#completed? ⇒ true, false
Indicates whether the task completed.
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# File 'lib/aws/decider/async_decider.rb', line 366 def completed? @completed end |
#continue_as_new_workflow(decision_id, continue_as_new_options) ⇒ Object
Continues this as a new workflow, using the provided decision and options.
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# File 'lib/aws/decider/async_decider.rb', line 321 def continue_as_new_workflow(decision_id, ) result = { :decision_type => "ContinueAsNewWorkflowExecution", } task_list = .task_list ? {:task_list => {:name => .task_list}} : {} to_add = .([:execution_start_to_close_timeout, :task_start_to_close_timeout, :child_policy, :tag_list, :workflow_type_version, :input], task_list) result[:continue_as_new_workflow_execution_decision_attributes] = to_add CompleteWorkflowStateMachine.new(decision_id, result) end |
#decide ⇒ Object
This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.
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# File 'lib/aws/decider/async_decider.rb', line 224 def decide begin decide_impl rescue Exception => error raise error ensure begin @decision_helper.workflow_context_data = @definition.get_workflow_state rescue WorkflowException => error @decision_helper.workflow_context_data = error.details rescue Exception => error @decision_helper.workflow_context_data = error. # Catch and do stuff ensure @workflow_definition_factory.delete_workflow_definition(@definition) end end end |
#decide_impl ⇒ Object
This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.
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# File 'lib/aws/decider/async_decider.rb', line 244 def decide_impl single_decision_event = @history_helper.get_single_decision_events while single_decision_event.length > 0 @decision_helper.handle_decision_task_started_event [*single_decision_event].each do |event| last_non_replay_event_id = @history_helper.get_last_non_replay_event_id @workflow_clock. = false if event.event_id >= last_non_replay_event_id @workflow_clock.replay_current_time_millis = @history_helper.get_replay_current_time_millis process_event(event) event_loop(event) end @task_token = @history_helper.get_decision_task.task_token complete_workflow if completed? single_decision_event = @history_helper.get_single_decision_events end if @unhandled_decision @unhandled_decision = false complete_workflow end end |
#event_loop(event) ⇒ Object
This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.
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# File 'lib/aws/decider/async_decider.rb', line 660 def event_loop(event) return if @completed begin @completed = @workflow_async_scope.eventLoop #TODO Make this a cancellationException, set it up correctly? rescue Exception => e @failure = e unless @cancel_requested @completed = true end end |
#get_decisions ⇒ Object
This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.
*Beware, this getter will modify things*, as it creates decisions for the objects in the AWS::Flow::AsyncDecider that need decisions sent out.
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# File 'lib/aws/decider/async_decider.rb', line 210 def get_decisions result = @decision_helper.decision_map.values.map {|decision_object| decision_object.get_decision}.compact if result.length > DecisionHelper.maximum_decisions_per_completion result = result.slice(0, DecisionHelper.maximum_decisions_per_completion - 1) result << ({:decision_type => "StartTimer", :start_timer_decision_attributes => { :timer_id => DecisionHelper.force_immediate_decision_timer, :start_to_fire_timeout => "0" }}) end return result end |
#handle_activity_task_cancel_requested(event) ⇒ Object
Handler for the ‘:ActivityTaskCancelRequested` event.
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# File 'lib/aws/decider/async_decider.rb', line 446 def handle_activity_task_cancel_requested(event) activity_id = event.attributes[:activity_id] @decision_helper[activity_id].consume(:handle_cancellation_initiated_event) end |
#handle_activity_task_scheduled(event) ⇒ Object
Handler for the ‘:ActivityTaskScheduled` event.
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# File 'lib/aws/decider/async_decider.rb', line 375 def handle_activity_task_scheduled(event) activity_id = event.attributes[:activity_id] @decision_helper.activity_scheduling_event_id_to_activity_id[event.id] = activity_id @decision_helper[activity_id].consume(:handle_initiated_event) return @decision_helper[activity_id].done? end |
#handle_cancel_timer_failed(event) ⇒ Object
Handler for the ‘:CancelTimerFailed` event.
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# File 'lib/aws/decider/async_decider.rb', line 584 def handle_cancel_timer_failed(event) handle_event(event, { :id_methods => [:timer_id], :consume_symbol => :handle_cancellation_failure_event }) end |
#handle_cancel_workflow_execution_failed(event) ⇒ Object
Handler for the ‘:CancelWorkflowExecutionFailed` event.
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# File 'lib/aws/decider/async_decider.rb', line 487 def handle_cancel_workflow_execution_failed(event) handle_closing_failure end |
#handle_closing_failure ⇒ Object
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# File 'lib/aws/decider/async_decider.rb', line 461 def handle_closing_failure @unhandled_decision = true @decision_helper[[:SELF, nil]].consume(:handle_initiation_failed_event) end |
#handle_complete_workflow_execution_failed(event) ⇒ Object
Handler for the ‘:CompleteWorkflowExecutionFailed` event.
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# File 'lib/aws/decider/async_decider.rb', line 469 def handle_complete_workflow_execution_failed(event) handle_closing_failure end |
#handle_continue_as_new_workflow_execution_failed(event) ⇒ Object
Handler for the ‘:ContinueAsNewWorkflowExecutionFailed` event.
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# File 'lib/aws/decider/async_decider.rb', line 496 def handle_continue_as_new_workflow_execution_failed(event) handle_closing_failure end |
#handle_fail_workflow_execution_failed(event) ⇒ Object
Handler for the ‘:FailWorkflowExecutionFailed` event.
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# File 'lib/aws/decider/async_decider.rb', line 478 def handle_fail_workflow_execution_failed(event) handle_closing_failure end |
#handle_request_cancel_activity_task_failed(event) ⇒ Object
Handler for the ‘:RequestCancelActivityTaskFailed` event.
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# File 'lib/aws/decider/async_decider.rb', line 454 def handle_request_cancel_activity_task_failed(event) handle_event(event, { :id_methods => [:activity_id], :consume_symbol => :handle_cancellation_failure_event }) end |
#handle_request_cancel_external_workflow_execution_failed(event) ⇒ Object
Handler for the ‘:RequestCancelExternalWorkflowExecutionFailed` event.
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# File 'lib/aws/decider/async_decider.rb', line 560 def handle_request_cancel_external_workflow_execution_failed(event) handle_event(event, { :id_methods => [:workflow_id], :consume_symbol => :handle_cancellation_failure_event }) end |
#handle_request_cancel_external_workflow_execution_initiated(event) ⇒ Object
Handler for the ‘:RequestCancelExternalWorkflowExecutionInitiated` event.
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# File 'lib/aws/decider/async_decider.rb', line 548 def handle_request_cancel_external_workflow_execution_initiated(event) handle_event(event, { :id_methods => [:workflow_id], :consume_symbol => :handle_cancellation_initiated_event }) end |
#handle_signal_external_workflow_execution_initiated(event) ⇒ Object
Handler for the ‘:SignalExternalWorkflowExecutionInitiated` event.
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# File 'lib/aws/decider/async_decider.rb', line 536 def handle_signal_external_workflow_execution_initiated(event) signal_id = event.attributes[:control] @decision_helper.signal_initiated_event_to_signal_id[event.id] = signal_id @decision_helper[signal_id].consume(:handle_initiated_event) @decision_helper[signal_id].done? end |
#handle_start_child_workflow_execution_initiated(event) ⇒ Object
Handler for the ‘:StartChildWorkflowExecutionInitiated` event.
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# File 'lib/aws/decider/async_decider.rb', line 572 def handle_start_child_workflow_execution_initiated(event) workflow_id = event.attributes[:workflow_id] @decision_helper.child_initiated_event_id_to_workflow_id[event.id] = workflow_id @decision_helper[workflow_id].consume(:handle_initiated_event) @decision_helper[workflow_id].done? end |
#handle_start_timer_failed(event) ⇒ Object
Handler for the ‘:StartTimerFailed` event.
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# File 'lib/aws/decider/async_decider.rb', line 418 def handle_start_timer_failed(event) timer_id = event.attributes.timer_id return if timer_id == DecisionHelper.force_immediate_decision_timer handle_event(event, { :id_methods => [:timer_id], :consume_symbol => :handle_completion_event, :decision_helper_scheduled => :scheduled_timers, :handle_open_request => lambda do |event, open_request| exception = StartTimerFailedException(event.id, timer_id, nil, event.attributes.cause) open_request.completion_handle.fail(exception) end }) state_machine = @decision_helper[timer_id] end |
#handle_timer_canceled(event) ⇒ Object
Handler for the ‘:TimerCanceled` event.
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# File 'lib/aws/decider/async_decider.rb', line 517 def handle_timer_canceled(event) handle_event(event, { :id_methods => [:timer_id], :consume_symbol => :handle_cancellation_event, :decision_helper_scheduled => :scheduled_timers, :handle_open_request => lambda do |event, open_request| if ! open_request.nil? cancellation_exception = CancellationException.new("Cancelled from a Timer Cancelled event") open_request.completion_handle.fail(cancellation_exception) end end }) end |
#handle_timer_fired(event) ⇒ Object
Handler for the ‘:TimerFired` event.
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# File 'lib/aws/decider/async_decider.rb', line 401 def handle_timer_fired(event) timer_id = event.attributes[:timer_id] return if timer_id == DecisionHelper.force_immediate_decision_timer @decision_helper[timer_id].consume(:handle_completion_event) if @decision_helper[timer_id].done? open_request = @decision_helper.scheduled_timers.delete(timer_id) return if open_request.nil? open_request.blocking_promise.set(nil) open_request.completion_handle.complete end end |
#handle_timer_started(event) ⇒ Object
Handler for the ‘:TimerStarted` event.
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# File 'lib/aws/decider/async_decider.rb', line 505 def handle_timer_started(event) timer_id = event.attributes[:timer_id] return if timer_id == DecisionHelper.force_immediate_decision_timer @decision_helper[timer_id].consume(:handle_initiated_event) @decision_helper[timer_id].done? end |
#handle_workflow_execution_cancel_requested(event) ⇒ Object
Handler for the ‘:WorkflowExecutionCancelRequested` event.
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# File 'lib/aws/decider/async_decider.rb', line 438 def handle_workflow_execution_cancel_requested(event) @workflow_async_scope.cancel(CancellationException.new("Cancelled from a WorkflowExecutionCancelRequested")) @cancel_requested = true end |
#handle_workflow_execution_signaled(event) ⇒ Object
Handler for the ‘WorkflowExecutionSignaled` event.
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# File 'lib/aws/decider/async_decider.rb', line 596 def handle_workflow_execution_signaled(event) signal_name = event.attributes[:signal_name] input = event.attributes[:input] if event.attributes.keys.include? :input input ||= NoInput.new # TODO do stuff if we are @completed t = Task.new(nil) do @definition.signal_received(signal_name, input) end task_context = TaskContext.new(:parent => @workflow_async_scope.get_closest_containing_scope, :task => t) @workflow_async_scope.get_closest_containing_scope << t end |
#handle_workflow_execution_started(event) ⇒ Object
Handler for the ‘:WorkflowExecutionStarted` event.
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# File 'lib/aws/decider/async_decider.rb', line 387 def handle_workflow_execution_started(event) @workflow_async_scope = AsyncScope.new do FlowFiber.current[:decision_context] = @decision_context input = (event.attributes.keys.include? :input) ? event.attributes[:input] : nil @definition = @workflow_definition_factory.get_workflow_definition(@decision_context) @result = @definition.execute(input) end end |
#make_cancel_decision(decision_id) ⇒ Object
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# File 'lib/aws/decider/async_decider.rb', line 310 def make_cancel_decision(decision_id) CompleteWorkflowStateMachine.new(decision_id, {:decision_type => "CancelWorkflowExecution"}) end |
#make_completion_decision(decision_id, decision) ⇒ Object
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# File 'lib/aws/decider/async_decider.rb', line 307 def make_completion_decision(decision_id, decision) CompleteWorkflowStateMachine.new(decision_id, decision) end |
#make_fail_decision(decision_id, failure) ⇒ Object
failing in this execution. This information can be useful for tracing the sequence of events back from the
failure.
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# File 'lib/aws/decider/async_decider.rb', line 278 def make_fail_decision(decision_id, failure) decision_type = "FailWorkflowExecution" # Sizes taken from # http://docs.aws.amazon.com/amazonswf/latest/apireference/API_FailWorkflowExecutionDecisionAttributes.html #reason = failure.reason if (failure.respond_to? :reason) max_response_size = 32768 truncation_overhead = 8000 reason ||= failure..slice(0, 255) detail_size = max_response_size - truncation_overhead # If you don't have details, you must be some other type of # exception. We can't do anything exceedingly clever, so lets just get # the stack trace and pop that out. details = failure.details if (failure.respond_to? :details) details ||= failure.backtrace.join("") new_details = details[0..(max_response_size - truncation_overhead)] if details.length > (max_response_size - truncation_overhead) new_details += "->->->->->THIS BACKTRACE WAS TRUNCATED" end # details.unshift(reason) # details = details.join("\n") fail_workflow_execution_decision_attributes = {:reason => reason, :details => new_details} decision = {:decision_type => decision_type, :fail_workflow_execution_decision_attributes => fail_workflow_execution_decision_attributes} CompleteWorkflowStateMachine.new(decision_id, decision) end |
#process_event(event) ⇒ Object
Processes decider events.
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# File 'lib/aws/decider/async_decider.rb', line 613 def process_event(event) event_type_symbol = event.event_type.to_sym # Mangle the name so that it is handle_ + the name of the event type in snakecase handle_event = "handle_" + event.event_type.gsub(/(.)([A-Z])/,'\1_\2').downcase noop_set = Set.new([:DecisionTaskScheduled, :DecisionTaskCompleted, :DecisionTaskStarted, :DecisionTaskTimedOut, :WorkflowExecutionTimedOut, :WorkflowExecutionTerminated, :MarkerRecorded, :WorkflowExecutionCompleted, :WorkflowExecutionFailed, :WorkflowExecutionCanceled, :WorkflowExecutionContinuedAsNew, :ActivityTaskStarted]) return if noop_set.member? event_type_symbol self_set = Set.new([:TimerFired, :StartTimerFailed, :WorkflowExecutionCancel, :ActivityTaskScheduled, :WorkflowExecutionCancelRequested, :ActivityTaskCancelRequested, :RequestCancelActivityTaskFailed, :CompleteWorkflowExecutionFailed, :FailWorkflowExecutionFailed, :CancelWorkflowExecutionFailed, :ContinueAsNewWorkflowExecutionFailed, :TimerStarted, :TimerCanceled, :SignalExternalWorkflowExecutionInitiated, :RequestCancelExternalWorkflowExecutionInitiated, :RequestCancelExternalWorkflowExecutionFailed, :StartChildWorkflowExecutionInitiated, :CancelTimerFailed, :WorkflowExecutionStarted, :WorkflowExecutionSignaled]) activity_client_set = Set.new([:ActivityTaskCompleted, :ActivityTaskCanceled, :ActivityTaskTimedOut, :ScheduleActivityTaskFailed, :ActivityTaskFailed]) workflow_client_set = Set.new([:ExternalWorkflowExecutionCancelRequested, :ChildWorkflowExecutionCanceled, :ChildWorkflowExecutionCompleted, :ChildWorkflowExecutionFailed, :ChildWorkflowExecutionStarted, :ChildWorkflowExecutionTerminated, :ChildWorkflowExecutionTimedOut, :ExternalWorkflowExecutionSignaled, :SignalExternalWorkflowExecutionFailed, :StartChildWorkflowExecutionFailed]) event_set_to_object_mapping = { self_set => self, activity_client_set => @activity_client, workflow_client_set => @workflow_client } thing_to_operate_on = event_set_to_object_mapping.map {|key, value| value if key.member? event_type_symbol }.compact.first thing_to_operate_on.send(handle_event, event) # DecisionTaskStarted is taken care of at TODO end |