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.



55
56
57
58
59
 
# File 'lib/parallel.rb', line 55

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

Instance Attribute Details

#pid ⇒ Object (readonly)

Returns the value of attribute pid.



52
53
54
 
# File 'lib/parallel.rb', line 52

def pid
  @pid
end

#read ⇒ Object (readonly)

Returns the value of attribute read.



52
53
54
 
# File 'lib/parallel.rb', line 52

def read
  @read
end

#thread ⇒ Object

Returns the value of attribute thread.



53
54
55
 
# File 'lib/parallel.rb', line 53

def thread
  @thread
end

#write ⇒ Object (readonly)

Returns the value of attribute write.



52
53
54
 
# File 'lib/parallel.rb', line 52

def write
  @write
end

Instance Method Details

#close_pipes ⇒ Object

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



68
69
70
71
 
# File 'lib/parallel.rb', line 68

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

#stop ⇒ Object 



61
62
63
64
 
# File 'lib/parallel.rb', line 61

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

#work(data) ⇒ Object 



73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
 
# File 'lib/parallel.rb', line 73

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 result.is_a?(ExceptionWrapper)
  result
end