Class: SimplerWorkflow::Activity

Inherits:
Object
  • Object
show all
Includes:
OptionsAsMethods
Defined in:
lib/simpler_workflow/activity.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from OptionsAsMethods

#method_missing

Constructor Details

#initialize(domain, name, version, options = {}) ⇒ Activity

Returns a new instance of Activity.



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# File 'lib/simpler_workflow/activity.rb', line 7

def initialize(domain, name, version, options = {})
  Activity.activities[[name, version]] ||= begin
    default_options = {
      :default_task_list => name,
      :default_task_start_to_close_timeout => 5 * 60,
      :default_task_schedule_to_start_timeout => 5 * 60,
      :default_task_schedule_to_close_timeout => 10 * 60,
      :default_task_heartbeat_timeout => :none
    }
    @options = default_options.merge(options)
    @domain = domain
    @name = name
    @version = version
    @failure_policy = :abort
    self
  end
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method in the class SimplerWorkflow::OptionsAsMethods

Instance Attribute Details

#domain ⇒ Object (readonly)

Returns the value of attribute domain.



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# File 'lib/simpler_workflow/activity.rb', line 5

def domain
  @domain
end

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/simpler_workflow/activity.rb', line 5

def name
  @name
end

#next_activity ⇒ Object (readonly)

Returns the value of attribute next_activity.



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# File 'lib/simpler_workflow/activity.rb', line 5

def next_activity
  @next_activity
end

#options ⇒ Object (readonly)

Returns the value of attribute options.



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# File 'lib/simpler_workflow/activity.rb', line 5

def options
  @options
end

#version ⇒ Object (readonly)

Returns the value of attribute version.



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# File 'lib/simpler_workflow/activity.rb', line 5

def version
  @version
end

Class Method Details

.[](name, version = nil) ⇒ Object 



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# File 'lib/simpler_workflow/activity.rb', line 132

def self.[](name, version = nil)
  case name
  when String
    name = name.to_sym
  when Hash
    name.symbolize_keys!
    version = name[:version]
    name = name[:name]
  end
  activities[[name, version]]
end

.register(name, version, activity) ⇒ Object 



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# File 'lib/simpler_workflow/activity.rb', line 144

def self.register(name, version, activity)
  activities[[name, version]] = activity
end

Instance Method Details

#count ⇒ Object 



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# File 'lib/simpler_workflow/activity.rb', line 128

def count
  domain.activity_tasks.count(name).to_i
end

#failure_policy ⇒ Object 



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# File 'lib/simpler_workflow/activity.rb', line 43

def failure_policy
  @failure_policy || :abort
end

#on_fail(failure_policy) ⇒ Object 



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# File 'lib/simpler_workflow/activity.rb', line 39

def on_fail(failure_policy)
  @failure_policy = failure_policy.to_sym
end

#on_success(activity, version = nil) ⇒ Object 



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# File 'lib/simpler_workflow/activity.rb', line 25

def on_success(activity, version = nil)
  case activity
  when Hash
    activity.symbolize_keys!
    name = activity[:name].to_sym
    version = activity[:version]
  when String
    name = activity.to_sym
  when Symbol
    name = activity
  end
  @next_activity = { :name => name, :version => version }
end

#perform_activity(&block) ⇒ Object 



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# File 'lib/simpler_workflow/activity.rb', line 47

def perform_activity(&block)
  @perform_task = block
end

#perform_task(task) ⇒ Object 



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# File 'lib/simpler_workflow/activity.rb', line 51

def perform_task(task)
  logger.info("Performing task #{name}")
  @perform_task.call(task)
rescue => e
  context = {}
  context[:activity_type] = [name.to_s, version]
  context[:input] = task.input
  context[:activity_id] = task.activity_id
  SimplerWorkflow.exception_reporter.report(e, context)
  task.fail! :reason => e.message[0..250], :details => {:failure_policy => failure_policy}.to_json
end

#poll_for_single_task ⇒ Object 



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# File 'lib/simpler_workflow/activity.rb', line 123

def poll_for_single_task
  logger.info("Polling for single task for #{name}")
  domain.activity_tasks.poll_for_single_task(name.to_s)
end

#start_activity_loop ⇒ Object 



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# File 'lib/simpler_workflow/activity.rb', line 67

def start_activity_loop
  SimplerWorkflow.child_processes << fork do

    $0 = "Activity: #{name} #{version}"

    Signal.trap('QUIT') do
      logger.info("Received SIGQUIT")
      @time_to_exit = true
    end

    Signal.trap('INT') do 
      logger.info("Received SIGINT")
      Process.exit!(0)
    end


    if SimplerWorkflow.after_fork
      SimplerWorkflow.after_fork.call
    end

    loop do
      begin
        logger.info("Starting activity_loop for #{name}")
        domain.activity_tasks.poll(name.to_s) do |task|
          begin
            logger.info("Received task...")
            perform_task(task)
            unless task.responded?
              if next_activity
                result = {:next_activity => next_activity}.to_json
                task.complete!(:result => result)
              else
                task.complete!
              end
            end
          rescue => e
            context = {}
            context[:activity_type] = [name.to_s, version]
            context[:input] = task.input
            context[:activity_id] = task.activity_id
            SimplerWorkflow.exception_reporter.report(e, context)
            task.fail! :reason => e.message, :details => { :failure_policy => :abort }.to_json unless task.responded?
          end
        end
        Process.exit(0) if @time_to_exit
      rescue Timeout::Error
        if @time_to_exit
          Process.exit(0)
        else
          retry
        end
      end
    end
  end
end

#to_activity_type ⇒ Object 



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# File 'lib/simpler_workflow/activity.rb', line 63

def to_activity_type
  domain.activity_types[name.to_s, version]
end