Class: Step

Inherits:
Object
  • Object
show all
Defined in:
lib/rbbt/workflow/step.rb,
lib/rbbt/workflow/accessor.rb,
lib/rbbt/workflow/step/run.rb,
lib/rbbt/workflow/step/dependencies.rb

Direct Known Subclasses

WorkflowRESTClient::RemoteStep

Constant Summary collapse

INFO_SERIALIAZER = 
Marshal
STREAM_CACHE = 
{}
STREAM_CACHE_MUTEX = 
Mutex.new

Class Attribute Summary collapse

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(path, task = nil, inputs = nil, dependencies = nil, bindings = nil, clean_name = nil) ⇒ Step

Returns a new instance of Step.



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# File 'lib/rbbt/workflow/step.rb', line 31

def initialize(path, task = nil, inputs = nil, dependencies = nil, bindings = nil, clean_name = nil)
  path = Path.setup(Misc.sanitize_filename(path)) if String === path
  path = path.call if Proc === path

  @path = path
  @task = task
  @bindings = bindings
  @dependencies = case
                  when dependencies.nil? 
                    []
                  when Array === dependencies
                    dependencies
                  else
                    [dependencies]
                  end
  @mutex = Mutex.new
  @info_mutex = Mutex.new
  @inputs = inputs || []
  NamedArray.setup @inputs, task.inputs.collect{|s| s.to_s} if task and task.respond_to? :inputs and task.inputs
end

Class Attribute Details

.lock_dir ⇒ Object

Returns the value of attribute lock_dir.



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# File 'lib/rbbt/workflow/step.rb', line 14

def lock_dir
  @lock_dir
end

.log_relay_step ⇒ Object

Returns the value of attribute log_relay_step.



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# File 'lib/rbbt/workflow/step.rb', line 77

def log_relay_step
  @log_relay_step
end

Instance Attribute Details

#bindings ⇒ Object

Returns the value of attribute bindings.



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# File 'lib/rbbt/workflow/step.rb', line 8

def bindings
  @bindings
end

#clean_name ⇒ Object

Returns the value of attribute clean_name.



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# File 'lib/rbbt/workflow/step.rb', line 8

def clean_name
  @clean_name
end

#dependencies ⇒ Object

Returns the value of attribute dependencies.



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# File 'lib/rbbt/workflow/step.rb', line 8

def dependencies
  @dependencies
end

#dupped ⇒ Object (readonly)

Returns the value of attribute dupped.



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# File 'lib/rbbt/workflow/step/run.rb', line 5

def dupped
  @dupped
end

#exec(no_load = false) ⇒ Object

Returns the value of attribute exec.



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# File 'lib/rbbt/workflow/step.rb', line 10

def exec
  @exec
end

#inputs ⇒ Object

Returns the value of attribute inputs.



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# File 'lib/rbbt/workflow/step.rb', line 8

def inputs
  @inputs
end

#mutex ⇒ Object

Returns the value of attribute mutex.



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# File 'lib/rbbt/workflow/step.rb', line 11

def mutex
  @mutex
end

#path ⇒ Object

Returns the value of attribute path.



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# File 'lib/rbbt/workflow/step.rb', line 8

def path
  @path
end

#pid ⇒ Object

Returns the value of attribute pid.



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# File 'lib/rbbt/workflow/step.rb', line 9

def pid
  @pid
end

#result ⇒ Object

Returns the value of attribute result.



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# File 'lib/rbbt/workflow/step.rb', line 11

def result
  @result
end

#saved_stream ⇒ Object (readonly)

Returns the value of attribute saved_stream.



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# File 'lib/rbbt/workflow/step/run.rb', line 5

def saved_stream
  @saved_stream
end

#seen ⇒ Object

Returns the value of attribute seen.



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# File 'lib/rbbt/workflow/step.rb', line 11

def seen
  @seen
end

#stream ⇒ Object (readonly)

Returns the value of attribute stream.



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# File 'lib/rbbt/workflow/step/run.rb', line 5

def stream
  @stream
end

#task ⇒ Object

Returns the value of attribute task.



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# File 'lib/rbbt/workflow/step.rb', line 8

def task
  @task
end

Class Method Details

.clean(path) ⇒ Object 



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# File 'lib/rbbt/workflow/step.rb', line 202

def self.clean(path)
  info_file = Step.info_file path
  pid_file = Step.pid_file path
  files_dir = Step.files_dir path

  if Open.exists?(path) or Open.exists?(pid_file) or Open.exists?(info_file)

    @result = nil
    @pid = nil

    Misc.insist do
      Open.rm info_file if Open.exists? info_file
      #Open.rm info_file + '.lock' if Open.exists? info_file + '.lock'
      Open.rm path if Open.exists? path
      #Open.rm path + '.lock' if Open.exists? path + '.lock'
      Open.rm_rf files_dir if Open.exists? files_dir
      Open.rm pid_file if Open.exists? pid_file
    end
  end
end

.dup_stream(stream) ⇒ Object 



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# File 'lib/rbbt/workflow/step/dependencies.rb', line 18

def self.dup_stream(stream)
  case stream
  when IO, File, Step
    return stream if stream.respond_to?(:closed?) and stream.closed?
    return stream if stream.respond_to?(:done?) and stream.done?

    STREAM_CACHE_MUTEX.synchronize do
      stream_key = Misc.fingerprint(stream)
      current = STREAM_CACHE[stream_key]
      case current
      when nil, Step
        Log.medium "Not duplicating stream #{stream_key}"
        STREAM_CACHE[stream_key] = stream
      when File
        if Open.exists? current.path 
          Log.medium "Reopening file #{stream_key}"
          Open.open(current.path)
        else
          new = Misc.dup_stream(current)
          Log.medium "Duplicating file #{stream_key} #{current.inspect} => #{Misc.fingerprint(new)}"
          new
        end
      else
        new = Misc.dup_stream(current)
        Log.medium "Duplicating stream #{stream_key} #{ Misc.fingerprint(stream) } => #{Misc.fingerprint(new)}"
        new
      end
    end
  when TSV::Dumper#, TSV::Parser
    stream = stream.stream
    return stream if stream.closed?

    STREAM_CACHE_MUTEX.synchronize do
      if STREAM_CACHE[stream].nil?
        Log.high "Not duplicating dumper #{ stream.inspect }"
        STREAM_CACHE[stream] = stream
      else
        new = Misc.dup_stream(STREAM_CACHE[stream])
        Log.high "Duplicating dumper #{ stream.inspect } into #{new.inspect}"
        new
      end
    end
  else
    stream
  end
end

.files_dir(path) ⇒ Object 



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# File 'lib/rbbt/workflow/accessor.rb', line 41

def self.files_dir(path)
  path.nil? ? nil : path + '.files'
end

.info_file(path) ⇒ Object 



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# File 'lib/rbbt/workflow/accessor.rb', line 45

def self.info_file(path)
  path.nil? ? nil : path + '.info'
end

.job_name_for_info_file(info_file, extension = nil) ⇒ Object 



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# File 'lib/rbbt/workflow/accessor.rb', line 64

def self.job_name_for_info_file(info_file, extension = nil)
  if extension and not extension.empty?
    info_file.sub(/\.#{extension}\.info$/,'')
  else
    info_file.sub(/\.info$/,'')
  end
end

.log(status, message, path, &block) ⇒ Object 



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# File 'lib/rbbt/workflow/accessor.rb', line 286

def self.log(status, message, path, &block)
  if block
    if Hash === message
      log_progress(status, message, path, &block)
    else
      log_block(status, message, path, &block)
    end
  else
    log_string(status, message, path)
  end
end

.log_block(status, message, path, &block) ⇒ Object 



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# File 'lib/rbbt/workflow/accessor.rb', line 216

def self.log_block(status, message, path, &block)
  start = Time.now
  status = status.to_s
  status_color = self.status_color status

  Log.info do 
    now = Time.now
    str = Log.color :reset
    str << "#{ Log.color status_color, status}"
    str << ": #{ message }" if message
    str << " -- #{Log.color :blue, path.to_s}" if path
    str << " #{Log.color :yellow, Process.pid}"
    str
  end
  res = yield
  eend = Time.now
  Log.info do 
    now = Time.now
    str = "#{ Log.color :cyan, status.to_s } +#{Log.color :green, "%.2f" % (eend - start)}"
    str << " -- #{Log.color :blue, path.to_s}" if path
    str << " #{Log.color :yellow, Process.pid}"
    str
  end
  res
end

.log_progress(status, options = {}, path = nil, &block) ⇒ Object 



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# File 'lib/rbbt/workflow/accessor.rb', line 257

def self.log_progress(status, options = {}, path = nil, &block)
  options = Misc.add_defaults options, :severity => Log::INFO, :file => path
  max = Misc.process_options options, :max
  Log::ProgressBar.with_bar(max, options) do |bar|
    begin
      res = yield bar
      raise KeepBar.new res if IO === res
      res
    rescue
      Log.exception $!
    end
  end
end

.log_string(status, message, path) ⇒ Object 



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# File 'lib/rbbt/workflow/accessor.rb', line 242

def self.log_string(status, message, path)
  Log.info do 

    status = status.to_s
    status_color = self.status_color status

    str = Log.color :reset
    str << "#{ Log.color status_color, status}"
    str << ": #{ message }" if message
    str << " -- #{Log.color :blue, path.to_s}" if path
    str << " #{Log.color :yellow, Process.pid}"
    str
  end
end

.pid_file(path) ⇒ Object 



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# File 'lib/rbbt/workflow/accessor.rb', line 49

def self.pid_file(path)
  path.nil? ? nil : path + '.pid'
end

.prepare_for_execution(job) ⇒ Object

Raises:



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# File 'lib/rbbt/workflow/step/dependencies.rb', line 75

def self.prepare_for_execution(job)
  return if job.done? && ! job.dirty?

  status = job.status.to_s

  if defined?(WorkflowRESTClient) && WorkflowRESTClient::RemoteStep === job 
    return unless (status == 'done' or status == 'error' or status == 'aborted')
  else
    return if status == 'streaming' and job.running?
  end

  if (status == 'error' || job.aborted?) && job.recoverable_error?
    job.clean 
  end

  job.dup_inputs unless status == 'done' or job.started?

  raise DependencyError, job if job.error?
end

.purge_stream_cache ⇒ Object 



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# File 'lib/rbbt/workflow/step/dependencies.rb', line 6

def self.purge_stream_cache
  Log.debug "Purging dup. stream cache"
  STREAM_CACHE_MUTEX.synchronize do
    #STREAM_CACHE.collect{|k,s| 
    #  Thread.new do
    #    Misc.consume_stream s
    #  end
    #}
    STREAM_CACHE.clear
  end
end

.status_color(status) ⇒ Object 



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# File 'lib/rbbt/workflow/accessor.rb', line 202

def self.status_color(status)
  status = status.split(">").last
  case status
  when "starting"
    :yellow
  when "error", "aborted"
    :red
  when "done"
    :green
  else
    :cyan
  end
end

.step_info(path) ⇒ Object 



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# File 'lib/rbbt/workflow/accessor.rb', line 53

def self.step_info(path)
  begin
    Open.open(info_file(path)) do |f|
      INFO_SERIALIAZER.load(f)
    end
  rescue Exception
    Log.exception $!
    {}
  end
end

.wait_for_jobs(jobs) ⇒ Object 



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# File 'lib/rbbt/workflow/accessor.rb', line 17

def self.wait_for_jobs(jobs)
  jobs = [jobs] if Step === jobs
  begin
    threads = []

    threads = jobs.collect do |j| 
      Thread.new do
        begin
          j.join unless j.done?
        rescue Exception
          Log.error "Exception waiting for job: #{Log.color :blue, j.path}"
          raise $!
        end
      end
    end

    threads.each{|t| t.join }
  rescue Exception
    threads.each{|t| t.exit }
    jobs.each do |j| j.abort end
    raise $!
  end
end

Instance Method Details

#_abort ⇒ Object 



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# File 'lib/rbbt/workflow/step/run.rb', line 388

def _abort
  return if @aborted
  @aborted = true
  Log.medium{"#{Log.color :red, "Aborting"} #{Log.color :blue, path}"}
  begin
    return if done?
    stop_dependencies
    abort_stream
    abort_pid if running?
  rescue Aborted, Interrupt
    Log.medium{"#{Log.color :red, "Aborting ABORTED RETRY"} #{Log.color :blue, path}"}
    retry
  rescue Exception
    Log.exception $!
    retry
  ensure
    _clean_finished
  end
end

#_clean_finished ⇒ Object 



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# File 'lib/rbbt/workflow/step/run.rb', line 377

def _clean_finished
  if Open.exists? path and not status == :done
    Log.warn "Aborted job had finished. Removing result -- #{ path }"
    begin
      Open.rm path
    rescue Exception
      Log.warn "Exception removing result of aborted job: #{$!.message}"
    end
  end
end

#_exec ⇒ Object 



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# File 'lib/rbbt/workflow/step/run.rb', line 54

def _exec
  resolve_input_steps
  @exec = true if @exec.nil?
  @task.exec_in((bindings ? bindings : self), *@inputs)
end

#abort ⇒ Object 



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# File 'lib/rbbt/workflow/step/run.rb', line 408

def abort
  return if done? and status == :done
  _abort
  log(:aborted, "Job aborted") unless aborted? or error?
  self
end

#abort_pid ⇒ Object 



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# File 'lib/rbbt/workflow/step/run.rb', line 339

def abort_pid
  @pid ||= info[:pid]

  case @pid
  when nil
    Log.medium "Could not abort #{path}: no pid"
    false
  when Process.pid
    Log.medium "Could not abort #{path}: same process"
    false
  else
    Log.medium "Aborting pid #{path}: #{ @pid }"
    begin
      Process.kill("INT", @pid)
      Process.waitpid @pid
    rescue Exception
      Log.debug("Aborted job #{@pid} was not killed: #{$!.message}")
    end
    Log.medium "Aborted pid #{path}: #{ @pid }"
    true
  end
end

#abort_stream ⇒ Object 



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# File 'lib/rbbt/workflow/step/run.rb', line 362

def abort_stream
  stream = @result if IO === @result
  @saved_stream = nil
  if stream and stream.respond_to? :abort and not stream.aborted?
    begin
      Log.medium "Aborting job stream #{stream.inspect} -- #{Log.color :blue, path}"
      stream.abort 
    rescue Aborted, Interrupt
      Log.medium "Aborting job stream #{stream.inspect} ABORTED RETRY -- #{Log.color :blue, path}"
      Log.exception $!
      retry
    end
  end
end

#aborted? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rbbt/workflow/accessor.rb', line 389

def aborted?
  status == :aborted || nopid?
end

#checks ⇒ Object 



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# File 'lib/rbbt/workflow/step/run.rb', line 69

def checks
  rec_dependencies.collect{|dependency| (defined? WorkflowRESTClient and WorkflowRESTClient::RemoteStep === dependency) ? nil : dependency.path }.compact.uniq
end

#child(&block) ⇒ Object 



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# File 'lib/rbbt/workflow/step.rb', line 171

def child(&block)
  child_pid = Process.fork &block
  children_pids = info[:children_pids]
  if children_pids.nil?
    children_pids = [child_pid]
  else
    children_pids << child_pid
  end
  #Process.detach(child_pid)
  set_info :children_pids, children_pids
  child_pid
end

#clean ⇒ Object 



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# File 'lib/rbbt/workflow/step.rb', line 223

def clean
  Log.medium "Cleaning step: #{path}"
  abort if not done? and running?
  Step.clean(path)
  self
end

#dirty? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rbbt/workflow/accessor.rb', line 352

def dirty?
  rec_dependencies.collect{|dependency| dependency.path }.uniq.reject{|path| not Path === path or path.exists?}.any?
end

#done? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rbbt/workflow/accessor.rb', line 356

def done?
  path and File.exist? path
end

#dup_inputs ⇒ Object 



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# File 'lib/rbbt/workflow/step/dependencies.rb', line 65

def dup_inputs
  return if @dupped or ENV["RBBT_NO_STREAM"] == 'true'
  Log.low "Dupping inputs for #{path}"
  dupped_inputs = @inputs.collect do |input|
    Step.dup_stream input
  end
  @inputs.replace dupped_inputs
  @dupped = true
end

#error? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rbbt/workflow/accessor.rb', line 380

def error?
  status == :error
end

#exception(ex, msg = nil) ⇒ Object 



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# File 'lib/rbbt/workflow/accessor.rb', line 306

def exception(ex, msg = nil)
  ex_class = ex.class.to_s
  set_info :backtrace, ex.backtrace
  set_info :exception, {:class => ex_class, :message => ex.message, :backtrace => ex.backtrace}
  if msg.nil?
    log :error, "#{ex_class} -- #{ex.message}"
  else
    log :error, "#{msg} -- #{ex.message}"
  end
  self._abort
end

#execute_and_dup(step, dep_step, log = true) ⇒ Object 



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# File 'lib/rbbt/workflow/step/dependencies.rb', line 172

def execute_and_dup(step, dep_step, log = true)
  dup = step.result.nil?
  execute_dependency(step, log)
  if dup and step.streaming? and not step.result.nil?
    if dep_step[step.path] and dep_step[step.path].length > 1
      stream = step.result
      other_steps = dep_step[step.path]
      return unless other_steps.length > 1
      log_dependency_exec(step, "duplicating #{other_steps.length}") 
      copies = Misc.tee_stream_thread_multiple(stream, other_steps.length)
      other_steps.zip(copies).each do |other,dupped_stream|
        stream.annotate(dupped_stream) if stream.respond_to?(:annotate)
        other.instance_variable_set("@result", dupped_stream)
      end
    end
  end
end

#execute_dependency(dependency, log = true) ⇒ Object 



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# File 'lib/rbbt/workflow/step/dependencies.rb', line 110

def execute_dependency(dependency, log = true)
  task_name = self.task_name
  begin

    dependency.resolve_input_steps

    if dependency.done?
      dependency.inputs.each do |v|
        Misc.consume_stream(v) if IO === v
        Misc.consume_stream(TSV.get_stream v) if Step === v and not v.done?  and  v.streaming?
      end
      log_dependency_exec(dependency, :done) if log
      return
    end

    if not dependency.started?
      log_dependency_exec(dependency, :starting)
      dependency.run(true)
      raise TryAgain
    end

    dependency.grace

    if dependency.aborted?
      log_dependency_exec(dependency, "aborted (clean)")
      dependency.clean
      raise TryAgain
    end

    if dependency.error?
      log_dependency_exec(dependency, :error)
      raise DependencyError, [dependency.path, dependency.messages.last] * ": " if dependency.error?
    end

    if dependency.streaming?
      log_dependency_exec(dependency, :streaming) if log
      return
    end

    begin
      log_dependency_exec(dependency, :joining)
      dependency.join
      raise TryAgain unless dependency.done?
    rescue Aborted
      raise TryAgain
    end

  rescue TryAgain
    retry
  rescue Aborted, Interrupt
    Log.error "Aborted dep. #{Log.color :red, dependency.task_name.to_s}"
    raise $!
  rescue Interrupt
    Log.error "Interrupted while in dep. #{Log.color :red, dependency.task_name.to_s}"
    raise $!
  rescue Exception
    Log.error "Exception in dep. #{ Log.color :red, dependency.task_name.to_s } -- #{$!.message}"
    Log.exception $!
    raise $!
  end
end

#file(name) ⇒ Object 



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# File 'lib/rbbt/workflow/accessor.rb', line 406

def file(name)
  Path.setup(File.join(files_dir, name.to_s))
end

#files ⇒ Object 



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# File 'lib/rbbt/workflow/accessor.rb', line 399

def files
  files = Dir.glob(File.join(files_dir, '**', '*')).reject{|path| File.directory? path}.collect do |path| 
    Misc.path_relative_to(files_dir, path) 
  end
  files
end

#files_dir ⇒ Object

{{{ INFO



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# File 'lib/rbbt/workflow/accessor.rb', line 395

def files_dir
  @files_dir ||= Step.files_dir path
end

#fork(no_load = false, semaphore = nil) ⇒ Object 



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# File 'lib/rbbt/workflow/step/run.rb', line 270

def fork(no_load = false, semaphore = nil)
  raise "Can not fork: Step is waiting for proces #{@pid} to finish" if not @pid.nil? and not Process.pid == @pid and Misc.pid_exists?(@pid) and not done? and info[:forked]
  sout, sin = Misc.pipe if no_load == :stream
  @pid = Process.fork do
    sout.close if sout
    Misc.pre_fork
    begin
      RbbtSemaphore.wait_semaphore(semaphore) if semaphore
      FileUtils.mkdir_p File.dirname(path) unless File.exist? File.dirname(path)
      begin
        @forked = true
        res = run no_load
        set_info :forked, true
        if sin
          io = TSV.get_stream res
          if io.respond_to? :setup
            io.setup(sin) 
            sin.pair = io
            io.pair = sin
          end
          begin
            Misc.consume_stream(io, false, sin)
          rescue 
            Log.warn "Could not consume stream (#{io.closed? ? 'closed' : 'open'}) into pipe for forked job: #{self.path}"
            Misc.consume_stream(io) unless io.closed?
          end
        end
      rescue Aborted, Interrupt
        Log.debug{"Forked process aborted: #{path}"}
        log :aborted, "Job aborted (#{Process.pid})"
        raise $!
      rescue Exception
        Log.debug("Exception '#{$!.message}' caught on forked process: #{path}")
        raise $!
      ensure
        join_stream
      end

      begin
        children_pids = info[:children_pids]
        if children_pids
          children_pids.each do |pid|
            if Misc.pid_exists? pid
              begin
                Process.waitpid pid
              rescue Errno::ECHILD
                Log.low "Waiting on #{ pid } failed: #{$!.message}"
              end
            end
          end
          set_info :children_done, Time.now
        end
      rescue Exception
        Log.debug("Exception waiting for children: #{$!.message}")
        RbbtSemaphore.post_semaphore(semaphore) if semaphore
        Kernel.exit! -1
      end
      set_info :pid, nil
    ensure
      RbbtSemaphore.post_semaphore(semaphore) if semaphore
      Kernel.exit! 0
    end
  end
  sin.close if sin
  @result = sout if sout 
  Process.detach(@pid)
  self
end

#get_exception ⇒ Object 



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# File 'lib/rbbt/workflow/accessor.rb', line 318

def get_exception
  if info[:exception].nil?
    raise Aborted if aborted?
    raise messages.last if error?
    return false 
  else
    ex_class, ex_message, ex_backtrace = info[:exception].values_at :class, :message, :backtrace
    begin
      klass = Kernel.const_get(ex_class)
      ex = klass.new ex_message
      #ex.set_backtrace ex_backtrace
      ex
    rescue
      Log.exception $!
      raise ex_message
    end
  end
end

#get_stream ⇒ Object 



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# File 'lib/rbbt/workflow/step/run.rb', line 7

def get_stream
  @mutex.synchronize do
    Log.low "Getting stream from #{path} #{!@saved_stream} [#{object_id}-#{Misc.fingerprint(@result)}]"
    begin
      return nil if @saved_stream
      if IO === @result 
        @saved_stream = @result 
      else 
        nil
      end
    end
  end
end

#grace ⇒ Object 



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# File 'lib/rbbt/workflow/step/run.rb', line 436

def grace
  until done? or result or error? or aborted? or streaming? 
    sleep 1 
  end
  self
end

#info(check_lock = true) ⇒ Object 



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# File 'lib/rbbt/workflow/accessor.rb', line 102

def info(check_lock = true)
  return {} if info_file.nil? or not Open.exists? info_file
  begin
    Misc.insist do
      begin
        return @info_cache if @info_cache and @info_cache_time and File.ctime(info_file) < @info_cache_time
      rescue Exception
        raise $!
      end

      begin
        @info_cache = Misc.insist(3, 1.6, info_file) do
          Misc.insist(2, 1, info_file) do
            Misc.insist(3, 0.2, info_file) do
              raise TryAgain, "Info locked" if check_lock and info_lock.locked?
              info_lock.lock if check_lock and false
              begin
                Open.open(info_file) do |file|
                  INFO_SERIALIAZER.load(file) #|| {}
                end
              ensure
                info_lock.unlock if check_lock and false
              end
            end
          end
        end
        @info_cache_time = Time.now
        @info_cache
      end
    end
  rescue Exception
    Log.debug{"Error loading info file: " + info_file}
    Log.exception $!
    Open.rm info_file
    Misc.sensiblewrite(info_file, INFO_SERIALIAZER.dump({:status => :error, :messages => ["Info file lost"]}))
    raise $!
  end
end

#info_file ⇒ Object

{{{ INFO



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# File 'lib/rbbt/workflow/accessor.rb', line 86

def info_file
  @info_file ||= Step.info_file(path)
end

#info_lock ⇒ Object 



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# File 'lib/rbbt/workflow/accessor.rb', line 94

def info_lock
  @info_lock = begin
                 path = Persist.persistence_path(info_file + '.lock', {:dir => Step.lock_dir})
                 Lockfile.new path, :refresh => false, :dont_use_lock_id => true
               end if @info_lock.nil?
  @info_lock
end

#init_info ⇒ Object 



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# File 'lib/rbbt/workflow/accessor.rb', line 141

def init_info
  return nil if @exec or info_file.nil?
  Open.lock(info_file, :lock => info_lock) do
    i = {:status => :init, :pid => Process.pid}
    @info_cache = i
    Misc.sensiblewrite(info_file, INFO_SERIALIAZER.dump(i), :force => true, :lock => false)
    @info_cache_time = Time.now
  end
end

#join ⇒ Object 



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# File 'lib/rbbt/workflow/step/run.rb', line 443

def join

  grace

  if streaming?
    join_stream 
  end

  return self if not Open.exists? info_file

  return self if info[:joined]

  pid = @pid 

  Misc.insist [0.1, 0.2, 0.5, 1] do
    pid ||= info[:pid]
  end

  begin

    if pid.nil? or Process.pid == pid
      dependencies.each{|dep| dep.join }
    else
      begin
        Log.debug{"Waiting for pid: #{pid}"}
        Process.waitpid pid 
      rescue Errno::ECHILD
        Log.debug{"Process #{ pid } already finished: #{ path }"}
      end if Misc.pid_exists? pid
      pid = nil
      dependencies.each{|dep| dep.join }
    end

    sleep 1 until path.exists? or error? or aborted?

    self
  ensure
    set_info :joined, true
    @result = nil
  end
end

#join_stream ⇒ Object 



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# File 'lib/rbbt/workflow/step/run.rb', line 415

def join_stream
  stream = get_stream if @result
  @result = nil
  if stream
    begin
      Misc.consume_stream stream 
      stream.join if stream.respond_to? :join
    rescue Exception
      stream.abort $!
      self._abort
    end
  end
end

#kill_children ⇒ Object 



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# File 'lib/rbbt/workflow/step/run.rb', line 73

def kill_children
  begin
    children_pids = info[:children_pids]
    if children_pids and children_pids.any?
      Log.medium("Killing children: #{ children_pids * ", " }")
      children_pids.each do |pid|
        Log.medium("Killing child #{ pid }")
        begin
          Process.kill "INT", pid
        rescue Exception
          Log.medium("Exception killing child #{ pid }: #{$!.message}")
        end
      end
    end
  rescue
    Log.medium("Exception finding children")
  end
end

#load ⇒ Object 



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# File 'lib/rbbt/workflow/step.rb', line 185

def load
  res = if @result and not @path == @result
          res = @result
        else
          join if not done?
          @path.exists? ? Persist.load_file(@path, @task.result_type) : exec
        end

  if @task.result_description
    entity_info = info.dup
    entity_info.merge! info[:inputs] if info[:inputs]
    res = prepare_result res, @task.result_description, entity_info 
  end

  res
end

#load_file(name, type = nil, options = {}) ⇒ Object 



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# File 'lib/rbbt/workflow/accessor.rb', line 426

def load_file(name, type = nil, options = {})
  if type.nil? and name =~ /.*\.(\w+)$/
    extension = name.match(/.*\.(\w+)$/)[1]
    case extension
    when "tc"
      type = :tc
    when "tsv"
      type = :tsv
    when "list", "ary", "array"
      type = :array
    when "yaml"
      type = :yaml
    when "marshal"
      type = :marshal
    else
      type = :other
    end
  else
    type ||= :other
  end

  case type.to_sym
  when :tc
    Persist.open_tokyocabinet(file(name), false)
  when :tsv
    TSV.open Open.open(file(name)), options
  when :array
    #Open.read(file(name)).split /\n|,\s*/
    Open.read(file(name)).split "\n"
  when :yaml
    YAML.load(Open.open(file(name)))
  when :marshal
    Marshal.load(Open.open(file(name)))
  else
    Open.read(file(name))
  end
end

#log(status, message = nil, &block) ⇒ Object 



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# File 'lib/rbbt/workflow/accessor.rb', line 298

def log(status, message = nil, &block)
  self.status = status
  if message
    self.message Log.uncolor(message)
  end
  Step.log(status, message, path, &block)
end

#log_dependency_exec(dependency, action) ⇒ Object 



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# File 'lib/rbbt/workflow/step/dependencies.rb', line 95

def log_dependency_exec(dependency, action)
  task_name = self.task_name

  str = Log.color(:reset, "")
  str << Log.color(:yellow, task_name.to_s || "") 
  str << " "
  str << Log.color(:magenta, action.to_s)
  str << " "
  str << Log.color(:yellow, dependency.task_name.to_s || "")
  str << " -- "
  str << "#{Log.color :blue, dependency.path}"

  Log.info str
end

#log_progress(status, options = {}, &block) ⇒ Object 



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# File 'lib/rbbt/workflow/accessor.rb', line 271

def log_progress(status, options = {}, &block)
  Step.log_progress(status, options, file(:progress), &block)
end

#merge_info(hash) ⇒ Object 



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# File 'lib/rbbt/workflow/accessor.rb', line 164

def merge_info(hash)
  return nil if @exec or info_file.nil?
  value = Annotated.purge value if defined? Annotated
  Open.lock(info_file, :lock => info_lock) do
    i = info(false)
    i.merge! hash
    @info_cache = i
    Misc.sensiblewrite(info_file, INFO_SERIALIAZER.dump(i), :force => true, :lock => false)
    @info_cache_time = Time.now
    value
  end
end

#message(message) ⇒ Object 



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# File 'lib/rbbt/workflow/accessor.rb', line 198

def message(message)
  set_info(:messages, (messages || []) << message)
end

#messages ⇒ Object 



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# File 'lib/rbbt/workflow/accessor.rb', line 190

def messages
  if messages = info[:messages]
    messages
  else
    set_info(:messages, []) if self.respond_to?(:set_info)
  end
end

#name ⇒ Object 



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# File 'lib/rbbt/workflow/accessor.rb', line 72

def name
  path.sub(/.*\/#{Regexp.quote task.name.to_s}\/(.*)/, '\1')
end

#nopid? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rbbt/workflow/accessor.rb', line 384

def nopid?
  pid = info[:pid]
  pid.nil? && ! (status.nil? || status.nil? || status == :aborted || status == :done || status == :error)
end

#pid_file ⇒ Object 



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# File 'lib/rbbt/workflow/accessor.rb', line 90

def pid_file
  @pid_file ||= Step.pid_file(path)
end

#prepare_result(value, description = nil, entity_info = nil) ⇒ Object 



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# File 'lib/rbbt/workflow/step.rb', line 97

def prepare_result(value, description = nil, entity_info = nil)
  res = case 
  when IO === value
    begin
      res = case @task.result_type
            when :array
              array = []
              while line = value.gets
                array << line.strip
              end
              array
            when :tsv
              begin
                TSV.open(value)
              rescue IOError
                TSV.setup({})
              end
            else
              value.read
            end
      value.join if value.respond_to? :join
      res
    rescue Exception
      value.abort if value.respond_to? :abort
      self.abort
      raise $!
    end
  when (not defined? Entity or description.nil? or not Entity.formats.include? description)
    value
  when (Annotated === value and info.empty?)
    value
  when Annotated === value
    annotations = value.annotations
    entity_info ||= begin 
                      entity_info = info.dup
                      entity_info.merge! info[:inputs] if info[:inputs]
                      entity_info
                    end
    entity_info.each do |k,v|
      value.send("#{h}=", v) if annotations.include? k
    end
                      
    value
  else
    entity_info ||= begin 
                      entity_info = info.dup
                      entity_info.merge! info[:inputs] if info[:inputs]
                      entity_info
                    end
    Entity.formats[description].setup(value, entity_info.merge(:format => description))
  end

  if Annotated === res
    dep_hash = nil
    res.annotations.each do |a|
      a = a.to_s
      varname = "@" + a
      next unless res.instance_variable_get(varname).nil? 

      dep_hash ||= begin
                     h = {}
                     rec_dependencies.each{|dep| h[dep.task_name.to_s] ||= dep }
                     h
                   end
      dep = dep_hash[a]
      next if dep.nil?
      res.send(a.to_s+"=", dep.load)
    end 
  end

  res
end

#produce(force = false, dofork = false) ⇒ Object 



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# File 'lib/rbbt/workflow/step/run.rb', line 243

def produce(force=false, dofork=false)
  return self if done? and not dirty?

  if error? or aborted? or stalled?
    abort if stalled?
    if force or aborted? or recoverable_error?
      clean
    else
      raise "Error in job: #{status} - #{self.path}"
    end
  end

  clean if dirty? or (not running? and not done?)

  if dofork
    fork(true) unless started?

    join unless done?
  else
    run(true) unless started?

    join unless done?
  end

  self
end

#progress_bar(msg = "Progress", options = nil) ⇒ Object 



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# File 'lib/rbbt/workflow/accessor.rb', line 275

def progress_bar(msg = "Progress", options = nil)
  if Hash === msg and options.nil?
    options = msg
    msg = nil
  end
  options = {} if options.nil?

  max = options[:max]
  Log::ProgressBar.new_bar(max, {:desc => msg, :file => file(:progress)}.merge(options))
end

#provenance ⇒ Object 



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# File 'lib/rbbt/workflow/accessor.rb', line 464

def provenance
  provenance = {}
  dependencies.each do |dep|
    next unless dep.path.exists?
    if File.exist? dep.info_file
      provenance[dep.path] = dep.provenance if File.exist? dep.path
    else
      provenance[dep.path] = nil
    end
  end
  {:inputs => info[:inputs], :provenance => provenance}
end

#provenance_paths ⇒ Object 



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# File 'lib/rbbt/workflow/accessor.rb', line 477

def provenance_paths
  provenance = {}
  dependencies.each do |dep|
    provenance[dep.path] = dep.provenance_paths if File.exist? dep.path
  end
  provenance
end

#rec_dependencies ⇒ Object 



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# File 'lib/rbbt/workflow/step.rb', line 230

def rec_dependencies

  # A step result with no info_file means that it was manually
  # placed. In that case, do not consider its dependencies
  return [] if not (defined? WorkflowRESTClient and  WorkflowRESTClient::RemoteStep === self) and Open.exists?(self.path.to_s) and not Open.exists? self.info_file

  return [] if dependencies.nil? or dependencies.empty?

  new_dependencies = []
  dependencies.each{|step| 
    r = step.rec_dependencies
    new_dependencies.concat r
    new_dependencies << step
  }
  new_dependencies.uniq
end

#recoverable_error? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rbbt/workflow/accessor.rb', line 337

def recoverable_error?
  return true if aborted?
  return false unless error?
  begin
    klass = Kernel.const_get(info[:exception][:class])
    not RbbtException === klass
  rescue Exception
    false
  end
end

#recursive_clean ⇒ Object 



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# File 'lib/rbbt/workflow/step.rb', line 247

def recursive_clean
  dependencies.each do |step| 
    step.recursive_clean 
  end
  clean if Open.exists?(self.info_file)
  self
end

#relay_log(step) ⇒ Object 



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# File 'lib/rbbt/workflow/step.rb', line 80

def relay_log(step)
  return self unless Task === self.task and not self.task.name.nil?
  if not self.respond_to? :original_log
    class << self
      attr_accessor :relay_step
      alias original_log log 
      def log(status, message = nil)
        self.status = status
        message Log.uncolor message
        relay_step.log([task.name.to_s, status.to_s] * ">", message.nil? ? nil : message ) unless (relay_step.done? or relay_step.error? or relay_step.aborted?)
      end
    end
  end
  @relay_step = step
  self
end

#resolve_input_steps ⇒ Object 



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# File 'lib/rbbt/workflow/step/run.rb', line 21

def resolve_input_steps
  step = false
  pos = 0
  new_inputs = @inputs.collect do |i| 
    begin
      if Step === i
        step = true
        if i.done?
          if (task.input_options[task.inputs[pos]] || {})[:stream]
            TSV.get_stream i
          else
            i.load
          end
        elsif i.streaming?
          TSV.get_stream i
        else
          i.join
          if (task.input_options[task.inputs[pos]] || {})[:stream]
            TSV.get_stream i
          else
            i.load
          end
        end
      else
        i
      end
    ensure
      pos += 1
    end
  end
  @inputs.replace new_inputs if step
end

#run(no_load = false) ⇒ Object 



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# File 'lib/rbbt/workflow/step/run.rb', line 92

def run(no_load = false)
  result = nil

  begin
    @mutex.synchronize do
      no_load = :stream if no_load
      result = Persist.persist "Job", @task.result_type, :file => path, :check => checks, :no_load => no_load do 
        if Step === Step.log_relay_step and not self == Step.log_relay_step
          relay_log(Step.log_relay_step) unless self.respond_to? :relay_step and self.relay_step
        end

        @exec = false
        Open.write(pid_file, Process.pid.to_s)
        init_info

        log :setup, "#{Log.color :green, "Setup"} step #{Log.color :yellow, task.name.to_s || ""}"

        merge_info({
          :issued => (issue_time = Time.now),
          :name => name,
          :clean_name => clean_name,
        })

        set_info :dependencies, dependencies.collect{|dep| [dep.task_name, dep.name, dep.path]}

        begin
          run_dependencies
        rescue Exception
          FileUtils.rm pid_file if File.exist?(pid_file)
          stop_dependencies
          raise $!
        end

        set_info :inputs, Misc.remove_long_items(Misc.zip2hash(task.inputs, @inputs)) unless task.inputs.nil?

        set_info :started, (start_time = Time.now)
        log :started, "Starting step #{Log.color :yellow, task.name.to_s || ""}"

        begin
          result = _exec
        rescue Aborted, Interrupt
          log(:aborted, "Aborted")
          raise $!
        rescue Exception
          backtrace = $!.backtrace

          # HACK: This fixes an strange behaviour in 1.9.3 where some
          # backtrace strings are coded in ASCII-8BIT
          backtrace.each{|l| l.force_encoding("UTF-8")} if String.instance_methods.include? :force_encoding
          set_info :backtrace, backtrace 
          log(:error, "#{$!.class}: #{$!.message}")
          stop_dependencies
          raise $!
        end

        if not no_load or ENV["RBBT_NO_STREAM"] == "true" 
          result = prepare_result result, @task.description, info if IO === result 
          result = prepare_result result.stream, @task.description, info if TSV::Dumper === result 
        end

        stream = case result
                 when IO
                   result
                 when TSV::Dumper
                   result.stream
                 end

        if stream
          log :streaming, "Streaming step #{Log.color :yellow, task.name.to_s || ""}"

          callback = Proc.new do
            if AbortedStream === stream
              if stream.exception
                raise stream.exception 
              else
                raise Aborted
              end
            end
            begin
              if status != :done
                Misc.insist do
                  set_info :done, (done_time = Time.now)
                  set_info :total_time_elapsed, (total_time_elapsed = done_time - issue_time)
                  set_info :time_elapsed, (time_elapsed = done_time - start_time)
                  log :done, "Completed step #{Log.color :yellow, task.name.to_s || ""} in #{time_elapsed.to_i}+#{(total_time_elapsed - time_elapsed).to_i} sec."
                end
              end
            rescue
              Log.exception $!
            ensure
              Step.purge_stream_cache
              FileUtils.rm pid_file if File.exist?(pid_file)
            end
          end

          abort_callback = Proc.new do |exception|
            begin
              if exception
                self.exception exception
              else
                log :aborted, "#{Log.color :red, "Aborted"} step #{Log.color :yellow, task.name.to_s || ""}" if status == :streaming
              end
              _clean_finished
            rescue
              Log.exception $!
              stop_dependencies
              FileUtils.rm pid_file if File.exist?(pid_file)
            end
          end

          ConcurrentStream.setup stream, :callback => callback, :abort_callback => abort_callback

          if AbortedStream === stream 
            exception = stream.exception || Aborted
            self.exception exception
            _clean_finished
            raise exception
          end
        else
          set_info :done, (done_time = Time.now)
          set_info :total_time_elapsed, (total_time_elapsed = done_time - issue_time)
          set_info :time_elapsed, (time_elapsed = done_time - start_time)
          log :done, "Completed step #{Log.color :yellow, task.name.to_s || ""} in #{time_elapsed.to_i}+#{(total_time_elapsed - time_elapsed).to_i} sec."
          Step.purge_stream_cache
          FileUtils.rm pid_file if File.exist?(pid_file)
        end

        set_info :dependencies, dependencies.collect{|dep| [dep.task_name, dep.name, dep.path]}

        result
      end

      if no_load
        @result ||= result
        self
      else
        Step.purge_stream_cache
        @result = prepare_result result, @task.result_description
      end
    end
  rescue Aborted, Interrupt
    abort
    stop_dependencies
    raise $!
  rescue Exception
    exception $!
    stop_dependencies
    raise $!
  end
end

#run_compute_dependencies(type, list, dep_step = {}) ⇒ Object 



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# File 'lib/rbbt/workflow/step/dependencies.rb', line 190

def run_compute_dependencies(type, list, dep_step = {})
  if Array === type
    type, *rest = type
  end

  case type
  when :produce, :no_dup
    list.each do |step|
      Misc.insist do
        begin
          step.produce
        rescue Exception
          step.abort
          raise $!
        end
      end
      nil
    end
  when :bootstrap
    cpus = rest.nil? ? nil : rest.first 
    cpus = 5 if cpus.nil?
    cpus = list.length / 2 if cpus > list.length / 2

    Misc.bootstrap(list, cpus, :bar => "Bootstrapping dependencies for #{path}", :respawn => :always) do |dep|
      Misc.insist do
        begin
          dep.produce 
          Log.warn "Error in bootstrap dependency #{dep.path}: #{dep.messages.last}" if dep.error? or dep.aborted?
        rescue Aborted
          dep.abort
          Log.warn "Aborted bootstrap dependency #{dep.path}: #{dep.messages.last}" if dep.error? or dep.aborted?
          raise $!
        rescue Exception
          dep.exception $!
          raise StopInsist.new($!)
        end
      end
      nil
    end
  else
    list.each do |step|
      execute_and_dup(step, dep_step, false)
    end
  end
end

#run_dependencies ⇒ Object 



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# File 'lib/rbbt/workflow/step/dependencies.rb', line 236

def run_dependencies
  dep_step = {}

  rec_dependencies = self.rec_dependencies

  return if rec_dependencies.empty?

  all_deps = rec_dependencies + [self]

  dependencies.each do |dep|
    next unless ComputeDependency === dep
    if dep.compute == :produce
      dep.produce 
    end
  end

  compute_deps = rec_dependencies.collect do |dep|
    next unless ComputeDependency === dep
    dep.rec_dependencies
  end.compact.flatten.uniq

  seen_paths = Set.new
  all_deps.uniq.each do |step|
    next if seen_paths.include? step.path
    seen_paths << step.path
    Step.prepare_for_execution(step) unless step == self
    next unless step.dependencies and step.dependencies.any?
    step.dependencies.each do |step_dep|
      next if step_dep.done? or step_dep.running? or (ComputeDependency === step_dep and step_dep.compute == :nodup)
      dep_step[step_dep.path] ||= []
      dep_step[step_dep.path] << step_dep
    end
  end
  
  self.dup_inputs

  required_dep_paths = []
  dep_step.each do |path,list|
    required_dep_paths << path if list.length > 1
  end

  required_dep_paths.concat dependencies.collect{|dep| dep.path }


  log :dependencies, "Dependencies for step #{Log.color :yellow, task.name.to_s || ""}"

  pre_deps = []
  compute_pre_deps = {}
  last_deps = []
  compute_last_deps = {}
  seen_paths = Set.new
  rec_dependencies.uniq.each do |step| 
    next if seen_paths.include? step.path
    seen_paths << step.path
    next unless required_dep_paths.include? step.path
    if dependencies.include?(step) and step.inputs.flatten.select{|i| Step === i}.any?
      if ComputeDependency === step
        compute_last_deps[step.compute] ||= []
        compute_last_deps[step.compute] << step
      else
        last_deps << step
      end
    else
      if ComputeDependency === step
        compute_pre_deps[step.compute] ||= []
        compute_pre_deps[step.compute] << step
      else
        pre_deps << step #if dependencies.include?(step)
      end
    end
  end

  Log.medium "Processing pre dependencies: #{Misc.fingerprint(pre_deps)} - #{Log.color :blue, self.path}" if pre_deps.any?
  pre_deps.each do |step|
    next if compute_deps.include? step
    execute_and_dup(step, dep_step, false)
  end

  Log.medium "Computing pre dependencies: #{Misc.fingerprint(compute_pre_deps)} - #{Log.color :blue, self.path}" if compute_pre_deps.any?
  compute_pre_deps.each do |type,list|
    run_compute_dependencies(type, list, dep_step)
  end

  Log.medium "Processing last dependencies: #{Misc.fingerprint(last_deps)} - #{Log.color :blue, self.path}" if last_deps.any?
  last_deps.each do |step|
    next if compute_deps.include? step
    execute_and_dup(step, dep_step)
  end

  Log.medium "Computing last dependencies: #{Misc.fingerprint(compute_last_deps)} - #{Log.color :blue, self.path}" if compute_last_deps.any?
  compute_last_deps.each do |type,list|
    run_compute_dependencies(type, list, dep_step)
  end

end

#running? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rbbt/workflow/accessor.rb', line 365

def running?
  pid = info[:pid]
  return nil if pid.nil?

  if Misc.pid_exists?(pid) 
    pid
  else
    false
  end
end

#save_file(name, content) ⇒ Object 



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# File 'lib/rbbt/workflow/accessor.rb', line 410

def save_file(name, content)
  content = case
            when String === content
              content
            when Array === content
              content * "\n"
            when TSV === content
              content.to_s
            when Hash === content
              content.collect{|*p| p * "\t"} * "\n"
            else
              content.to_s
            end
  Open.write(file(name), content)
end

#set_info(key, value) ⇒ Object 



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# File 'lib/rbbt/workflow/accessor.rb', line 151

def set_info(key, value)
  return nil if @exec or info_file.nil?
  value = Annotated.purge value if defined? Annotated
  Open.lock(info_file, :lock => info_lock) do
    i = info(false).dup
    i[key] = value 
    @info_cache = i
    Misc.sensiblewrite(info_file, INFO_SERIALIAZER.dump(i), :force => true, :lock => false)
    @info_cache_time = Time.now
    value
  end
end

#short_path ⇒ Object 



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# File 'lib/rbbt/workflow/accessor.rb', line 76

def short_path
  [task_name, name] * "/"
end

#soft_grace ⇒ Object 



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# File 'lib/rbbt/workflow/step/run.rb', line 429

def soft_grace
  until done? or File.exist?(info_file)
    sleep 1 
  end
  self
end

#stalled? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rbbt/workflow/accessor.rb', line 376

def stalled?
  started? && ! (done? || error? || aborted?) && ! running?
end

#started? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rbbt/workflow/accessor.rb', line 348

def started?
  Open.exists?(path) or Open.exists?(pid_file) or Open.exists?(info_file)
end

#status ⇒ Object 



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# File 'lib/rbbt/workflow/accessor.rb', line 177

def status
  begin
    info[:status]
  rescue Exception
    Log.error "Exception reading status: #{$!.message}" 
    :error
  end
end

#status=(status) ⇒ Object 



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# File 'lib/rbbt/workflow/accessor.rb', line 186

def status=(status)
  set_info(:status, status)
end

#step(name) ⇒ Object 



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# File 'lib/rbbt/workflow/step.rb', line 255

def step(name)
  @steps ||= {}
  @steps[name] ||= begin
                     deps = rec_dependencies.select{|step| 
                       step.task_name.to_sym == name.to_sym
                     }
                     raise "Dependency step not found: #{ name }" if deps.empty?
                     if (deps & self.dependencies).any?
                       (deps & self.dependencies).first
                     else
                       deps.first
                     end
                   end
end

#stop_dependencies ⇒ Object 



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# File 'lib/rbbt/workflow/step/dependencies.rb', line 332

def stop_dependencies
  return if dependencies.nil?
  dependencies.each do |dep|
    begin
      next if dep.done? or dep.aborted?
    rescue
    end
    dep.abort
  end
  kill_children
end

#streaming? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rbbt/workflow/accessor.rb', line 360

def streaming?
  IO === @result or @saved_stream or status == :streaming
end

#task_name ⇒ Object 



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# File 'lib/rbbt/workflow/step.rb', line 64

def task_name
  @task.name
end