Module: Pwrake::TaskAlgorithm

Included in:
Rake::Task
Defined in:
lib/pwrake/task/task_algorithm.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#arguments ⇒ Object (readonly)

Returns the value of attribute arguments.



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# File 'lib/pwrake/task/task_algorithm.rb', line 9

def arguments
  @arguments
end

#property ⇒ Object (readonly)

Returns the value of attribute property.



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# File 'lib/pwrake/task/task_algorithm.rb', line 10

def property
  @property
end

#subsequents ⇒ Object (readonly)

Returns the value of attribute subsequents.



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# File 'lib/pwrake/task/task_algorithm.rb', line 8

def subsequents
  @subsequents
end

#unfinished_prereq ⇒ Object (readonly)

Returns the value of attribute unfinished_prereq.



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# File 'lib/pwrake/task/task_algorithm.rb', line 11

def unfinished_prereq
  @unfinished_prereq
end

Instance Method Details

#check_prereq_finished(preq_name = nil) ⇒ Object 



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# File 'lib/pwrake/task/task_algorithm.rb', line 97

def check_prereq_finished(preq_name=nil)
  @unfinished_prereq.delete(preq_name)
  !@already_finished && @unfinished_prereq.empty?
end

#pw_enq_subsequents ⇒ Object 



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# File 'lib/pwrake/task/task_algorithm.rb', line 87

def pw_enq_subsequents
  # not synchronize owing to fiber
  @subsequents.each do |t|        # <<--- competition !!!
    if t && t.check_prereq_finished(self.name)
      application.task_queue.enq(t.wrapper)
    end
  end
  @already_finished = true        # <<--- competition !!!
end

#pw_search_tasks(args) ⇒ Object 



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# File 'lib/pwrake/task/task_algorithm.rb', line 20

def pw_search_tasks(args)
  Log.debug "#{self.class}#pw_search_tasks start, task=#{name} args=#{args.inspect}"
  tm = Time.now
  task_args = TaskArguments.new(arg_names, args)
  # not synchronize owing to fiber
  search_with_call_chain(nil, task_args, InvocationChain::EMPTY)
  #
  Log.debug "#{self.class}#pw_search_tasks end #{Time.now-tm}"
end

#pw_set_property(property) ⇒ Object 



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# File 'lib/pwrake/task/task_algorithm.rb', line 102

def pw_set_property(property)
  if @property
    @property.merge(property)
  else
    @property = property
  end
  self
end

#search_prerequisites(task_args, invocation_chain) ⇒ Object

Search all the prerequisites of a task.



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# File 'lib/pwrake/task/task_algorithm.rb', line 66

def search_prerequisites(task_args, invocation_chain) # :nodoc:
  @unfinished_prereq = {}
  @prerequisites.each{|t| @unfinished_prereq[t]=true}
  prerequisite_tasks.each { |prereq|
    prereq_args = task_args.new_scope(prereq.arg_names)
    if prereq.search_with_call_chain(self, prereq_args, invocation_chain)
      @unfinished_prereq.delete(prereq.name)
    end
  }
end

#search_with_call_chain(subseq, task_args, invocation_chain) ⇒ Object

Same as search, but explicitly pass a call chain to detect circular dependencies.



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# File 'lib/pwrake/task/task_algorithm.rb', line 32

def search_with_call_chain(subseq, task_args, invocation_chain) # :nodoc:
  new_chain = InvocationChain.append(self, invocation_chain)
  @lock.synchronize do
    if application.options.trace
      #Log.debug "** Search #{name} #{format_search_flags}"
      application.trace "** Search #{name} #{format_search_flags}"
    end

    return true if @already_finished # <<--- competition !!!
    @subsequents ||= []
    @subsequents << subseq if subseq # <<--- competition !!!

    if ! @already_searched
      @already_searched = true
      @arguments = task_args
      @wrapper = TaskWrapper.new(self,task_args)
      if @prerequisites.empty?
        @unfinished_prereq = {}
      else
        search_prerequisites(task_args, new_chain)
      end
      #check_and_enq
      if !@already_finished && @unfinished_prereq.empty?
        application.task_queue.enq(@wrapper)
      end
    end
    return false
  end
rescue Exception => ex
  add_chain_to(ex, new_chain)
  raise ex
end

#wrapper ⇒ Object 



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# File 'lib/pwrake/task/task_algorithm.rb', line 13

def wrapper
  if @wrapper.nil?
    raise "TaskWrapper is not defined for #{self.class}[#{name}]"
  end
  @wrapper
end