Class: Parallel::Worker

Inherits:
Object
  • Object
show all
Defined in:
lib/parallel.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(read, write, pid) ⇒ Worker

Returns a new instance of Worker.


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# File 'lib/parallel.rb', line 34

def initialize(read, write, pid)
  @read, @write, @pid = read, write, pid
end

Instance Attribute Details

#pidObject (readonly)

Returns the value of attribute pid


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# File 'lib/parallel.rb', line 32

def pid
  @pid
end

#readObject (readonly)

Returns the value of attribute read


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# File 'lib/parallel.rb', line 32

def read
  @read
end

#threadObject

Returns the value of attribute thread


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# File 'lib/parallel.rb', line 33

def thread
  @thread
end

#writeObject (readonly)

Returns the value of attribute write


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# File 'lib/parallel.rb', line 32

def write
  @write
end

Instance Method Details

#close_pipesObject

might be passed to started_processes and simultaneously closed by another thread when running in isolation mode, so we have to check if it is closed before closing


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# File 'lib/parallel.rb', line 45

def close_pipes
  read.close unless read.closed?
  write.close unless write.closed?
end

#stopObject


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# File 'lib/parallel.rb', line 38

def stop
  close_pipes
  wait # if it goes zombie, rather wait here to be able to debug
end

#work(data) ⇒ Object


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# File 'lib/parallel.rb', line 50

def work(data)
  begin
    Marshal.dump(data, write)
  rescue Errno::EPIPE
    raise DeadWorker
  end

  result = begin
    Marshal.load(read)
  rescue EOFError
    raise DeadWorker
  end
  raise result.exception if ExceptionWrapper === result
  result
end