class Dynflow::ExecutionPlan
TODO extract planning logic to an extra class ExecutionPlanner
Attributes
Public Class Methods
all params with default values are part of private api
# File lib/dynflow/execution_plan.rb, line 69 def initialize(world, id = SecureRandom.uuid, label = nil, state = :pending, root_plan_step = nil, run_flow = Flows::Concurrence.new([]), finalize_flow = Flows::Sequence.new([]), steps = {}, started_at = nil, ended_at = nil, execution_time = nil, real_time = 0.0, execution_history = ExecutionHistory.new) @id = Type! id, String @world = Type! world, World @label = Type! label, String, NilClass self.state = state @run_flow = Type! run_flow, Flows::Abstract @finalize_flow = Type! finalize_flow, Flows::Abstract @root_plan_step = root_plan_step @started_at = Type! started_at, Time, NilClass @ended_at = Type! ended_at, Time, NilClass @execution_time = Type! execution_time, Numeric, NilClass @real_time = Type! real_time, Numeric @execution_history = Type! execution_history, ExecutionHistory steps.all? do |k, v| Type! k, Integer Type! v, Steps::Abstract end @steps = steps end
# File lib/dynflow/execution_plan.rb, line 398 def self.new_from_hash(hash, world) check_class_matching hash execution_plan_id = hash[:id] steps = steps_from_hash(hash[:step_ids], execution_plan_id, world) self.new(world, execution_plan_id, hash[:label], hash[:state], steps[hash[:root_plan_step_id]], Flows::Abstract.from_hash(hash[:run_flow]), Flows::Abstract.from_hash(hash[:finalize_flow]), steps, string_to_time(hash[:started_at]), string_to_time(hash[:ended_at]), hash[:execution_time].to_f, hash[:real_time].to_f, ExecutionHistory.new_from_hash(hash[:execution_history])) rescue => plan_exception begin world.logger.error("Could not load execution plan #{execution_plan_id}") world.logger.error(plan_exception) InvalidPlan.new(plan_exception, execution_plan_id, hash[:label], hash[:state], string_to_time(hash[:started_at]), string_to_time(hash[:ended_at]), hash[:execution_time].to_f, hash[:real_time].to_f, ExecutionHistory.new_from_hash(hash[:execution_history])) rescue => invalid_plan_exception world.logger.error("Could not even load a fallback execution plan for #{execution_plan_id}") world.logger.error(invalid_plan_exception) InvalidPlan.new(invalid_plan_exception, execution_plan_id, hash[:label], hash[:state]) end end
# File lib/dynflow/execution_plan.rb, line 54 def self.results @results ||= [:pending, :success, :warning, :error] end
# File lib/dynflow/execution_plan.rb, line 58 def self.state_transitions @state_transitions ||= { pending: [:stopped, :scheduled, :planning], scheduled: [:planning, :stopped], planning: [:planned, :stopped], planned: [:running, :stopped], running: [:paused, :stopped], paused: [:running, :stopped], stopped: [] } end
# File lib/dynflow/execution_plan.rb, line 50 def self.states @states ||= [:pending, :scheduled, :planning, :planned, :running, :paused, :stopped] end
Private Class Methods
# File lib/dynflow/execution_plan.rb, line 488 def self.steps_from_hash(step_ids, execution_plan_id, world) steps = world.persistence.load_steps(execution_plan_id, world) ids_to_steps = steps.inject({}) do |hash, step| hash[step.id.to_i] = step hash end # to make sure to we preserve the order of the steps step_ids.inject({}) do |hash, step_id| step = ids_to_steps[step_id.to_i] if step.nil? raise Errors::DataConsistencyError, "Could not load steps for execution plan #{execution_plan_id}" else hash[step_id.to_i] = step end hash end end
Public Instance Methods
@return [Array<Action>] actions in Present phase
# File lib/dynflow/execution_plan.rb, line 460 def actions @actions ||= begin [entry_action] + entry_action.all_planned_actions end end
# File lib/dynflow/execution_plan.rb, line 370 def add_finalize_step(action) add_step(Steps::FinalizeStep, action.class, action.id).tap do |step| step.progress_weight = action.finalize_progress_weight finalize_flow << Flows::Atom.new(step.id) end end
# File lib/dynflow/execution_plan.rb, line 352 def add_plan_step(action_class, caller_action = nil) add_step(Steps::PlanStep, action_class, generate_action_id).tap do |step| # TODO: to be removed and preferred by the caller_action if caller_action && caller_action.execution_plan_id == self.id @steps[caller_action.plan_step_id].children << step.id end step.initialize_action(caller_action) end end
# File lib/dynflow/execution_plan.rb, line 362 def add_run_step(action) add_step(Steps::RunStep, action.class, action.id).tap do |step| step.progress_weight = action.run_progress_weight @dependency_graph.add_dependencies(step, action) current_run_flow.add_and_resolve(@dependency_graph, Flows::Atom.new(step.id)) end end
# File lib/dynflow/execution_plan.rb, line 346 def add_scheduling_step(action_class, caller_action = nil) add_step(Steps::PlanStep, action_class, generate_action_id, :scheduling).tap do |step| step.initialize_action(caller_action) end end
# File lib/dynflow/execution_plan.rb, line 466 def caller_execution_plan_id entry_action.caller_execution_plan_id end
sends the cancel event to all currently running and cancellable steps. if the plan is just scheduled, it cancels it (and returns an one-item array with the future value of the cancel result)
# File lib/dynflow/execution_plan.rb, line 263 def cancel if state == :scheduled [Concurrent.future.tap { |f| f.success delay_record.cancel }] else steps_to_cancel.map do |step| world.event(id, step.id, ::Dynflow::Action::Cancellable::Cancel) end end end
# File lib/dynflow/execution_plan.rb, line 273 def cancellable? return true if state == :scheduled return false unless state == :running steps_to_cancel.any? end
# File lib/dynflow/execution_plan.rb, line 436 def compute_execution_time self.steps.values.reduce(0) do |execution_time, step| execution_time + (step.execution_time || 0) end end
# File lib/dynflow/execution_plan.rb, line 322 def current_run_flow @run_flow_stack.last end
# File lib/dynflow/execution_plan.rb, line 212 def delay(caller_action, action_class, delay_options, *args) save @root_plan_step = add_scheduling_step(action_class, caller_action) execution_history.add("delay", @world.id) serializer = root_plan_step.delay(delay_options, args) delayed_plan = DelayedPlan.new(@world, id, delay_options[:start_at], delay_options.fetch(:start_before, nil), serializer) persistence.save_delayed_plan(delayed_plan) ensure update_state(error? ? :stopped : :scheduled) end
# File lib/dynflow/execution_plan.rb, line 227 def delay_record @delay_record ||= persistence.load_delayed_plan(id) end
# File lib/dynflow/execution_plan.rb, line 455 def entry_action @entry_action ||= root_plan_step.action(self) end
# File lib/dynflow/execution_plan.rb, line 141 def error? result == :error end
# File lib/dynflow/execution_plan.rb, line 145 def error_in_plan? steps_in_state(:error).any? { |step| step.is_a? Steps::PlanStep } end
# File lib/dynflow/execution_plan.rb, line 149 def errors steps.values.map(&:error).compact end
# File lib/dynflow/execution_plan.rb, line 186 def failed_steps steps_in_state(:error) end
# File lib/dynflow/execution_plan.rb, line 182 def finalize_steps steps_of_type(Dynflow::ExecutionPlan::Steps::FinalizeStep) end
# File lib/dynflow/execution_plan.rb, line 202 def generate_action_id @last_action_id ||= 0 @last_action_id += 1 end
# File lib/dynflow/execution_plan.rb, line 207 def generate_step_id @last_step_id ||= 0 @last_step_id += 1 end
# File lib/dynflow/execution_plan.rb, line 107 def logger @world.logger end
# File lib/dynflow/execution_plan.rb, line 240 def plan(*args) update_state(:planning) world.middleware.execute(:plan_phase, root_plan_step.action_class, self) do with_planning_scope do root_action = root_plan_step.execute(self, nil, false, *args) @label = root_action.label if @dependency_graph.unresolved? raise "Some dependencies were not resolved: #{@dependency_graph.inspect}" end end end if @run_flow.size == 1 @run_flow = @run_flow.sub_flows.first end steps.values.each(&:save) update_state(error? ? :stopped : :planned) end
# File lib/dynflow/execution_plan.rb, line 174 def plan_steps steps_of_type(Dynflow::ExecutionPlan::Steps::PlanStep) end
# File lib/dynflow/execution_plan.rb, line 231 def prepare(action_class, options = {}) options = options.dup caller_action = Type! options.delete(:caller_action), Dynflow::Action, NilClass raise "Unexpected options #{options.keys.inspect}" unless options.empty? save @root_plan_step = add_plan_step(action_class, caller_action) @root_plan_step.save end
@return [0..1] the percentage of the progress. See Action::Progress for more info
# File lib/dynflow/execution_plan.rb, line 444 def progress return 0 if [:pending, :planning, :scheduled].include?(state) flow_step_ids = run_flow.all_step_ids + finalize_flow.all_step_ids plan_done, plan_total = flow_step_ids.reduce([0.0, 0]) do |(done, total), step_id| step = self.steps[step_id] [done + (step.progress_done * step.progress_weight), total + step.progress_weight] end plan_total > 0 ? (plan_done / plan_total) : 1 end
# File lib/dynflow/execution_plan.rb, line 194 def rescue_from_error if rescue_plan_id = self.rescue_plan_id @world.execute(rescue_plan_id) else raise Errors::RescueError, 'Unable to rescue from the error' end end
# File lib/dynflow/execution_plan.rb, line 161 def rescue_plan_id case rescue_strategy when Action::Rescue::Pause nil when Action::Rescue::Fail update_state :stopped nil when Action::Rescue::Skip failed_steps.each { |step| self.skip(step) } self.id end end
# File lib/dynflow/execution_plan.rb, line 153 def rescue_strategy Type! entry_action.rescue_strategy, Action::Rescue::Strategy end
# File lib/dynflow/execution_plan.rb, line 128 def result all_steps = steps.values if all_steps.any? { |step| step.state == :error } return :error elsif all_steps.any? { |step| [:skipping, :skipped].include?(step.state) } return :warning elsif all_steps.all? { |step| step.state == :success } return :success else return :pending end end
# File lib/dynflow/execution_plan.rb, line 178 def run_steps steps_of_type(Dynflow::ExecutionPlan::Steps::RunStep) end
# File lib/dynflow/execution_plan.rb, line 394 def save persistence.save_execution_plan(self) end
# File lib/dynflow/execution_plan.rb, line 285 def skip(step) steps_to_skip = steps_to_skip(step).each(&:mark_to_skip) self.save return steps_to_skip end
# File lib/dynflow/execution_plan.rb, line 190 def steps_in_state(*states) self.steps.values.find_all {|step| states.include?(step.state) } end
@api private
# File lib/dynflow/execution_plan.rb, line 318 def steps_of_type(type) steps.values.find_all { |step| step.is_a?(type) } end
# File lib/dynflow/execution_plan.rb, line 279 def steps_to_cancel steps_in_state(:running, :suspended).find_all do |step| step.action(self).is_a?(::Dynflow::Action::Cancellable) end end
All the steps that need to get skipped when wanting to skip the step includes the step itself, all steps dependent on it (even transitively) FIND maybe move to persistence to let adapter to do it effectively? @return [Array<Steps::Abstract>]
# File lib/dynflow/execution_plan.rb, line 295 def steps_to_skip(step) dependent_steps = steps.values.find_all do |s| next if s.is_a? Steps::PlanStep action = persistence.load_action(s) action.required_step_ids.include?(step.id) end steps_to_skip = dependent_steps.map do |dependent_step| steps_to_skip(dependent_step) end.flatten steps_to_skip << step if step.is_a? Steps::RunStep finalize_step_id = persistence.load_action(step).finalize_step_id steps_to_skip << steps[finalize_step_id] if finalize_step_id end return steps_to_skip.uniq end
# File lib/dynflow/execution_plan.rb, line 157 def sub_plans persistence.find_execution_plans(filters: { 'caller_execution_plan_id' => self.id }) end
@api private Switches the flow type (Sequence, Concurrence) to be used within the block.
# File lib/dynflow/execution_plan.rb, line 338 def switch_flow(new_flow, &block) @run_flow_stack << new_flow return block.call ensure @run_flow_stack.pop current_run_flow.add_and_resolve(@dependency_graph, new_flow) if current_run_flow end
# File lib/dynflow/execution_plan.rb, line 377 def to_hash recursive_to_hash id: id, class: self.class.to_s, label: label, state: state, result: result, root_plan_step_id: root_plan_step && root_plan_step.id, run_flow: run_flow, finalize_flow: finalize_flow, step_ids: steps.map { |id, _| id }, started_at: time_to_str(started_at), ended_at: time_to_str(ended_at), execution_time: execution_time, real_time: real_time, execution_history: execution_history.to_hash end
# File lib/dynflow/execution_plan.rb, line 111 def update_state(state) original = self.state case self.state = state when :planning @started_at = Time.now when :stopped @ended_at = Time.now @real_time = @ended_at - @started_at unless @started_at.nil? @execution_time = compute_execution_time else # ignore end logger.debug format('%13s %s %9s >> %9s', 'ExecutionPlan', id, original, state) self.save end
# File lib/dynflow/execution_plan.rb, line 103 def valid? true end
@api private
# File lib/dynflow/execution_plan.rb, line 327 def with_planning_scope(&block) @run_flow_stack = [] @dependency_graph = DependencyGraph.new switch_flow(run_flow, &block) ensure @run_flow_stack = nil @dependency_graph = nil end
Private Instance Methods
# File lib/dynflow/execution_plan.rb, line 476 def add_step(step_class, action_class, action_id, state = :pending) step_class.new(self.id, self.generate_step_id, state, action_class, action_id, nil, world).tap do |new_step| @steps[new_step.id] = new_step end end
# File lib/dynflow/execution_plan.rb, line 472 def persistence world.persistence end