Class: Phantom::Base

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

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(pid) ⇒ Base

Returns a new instance of Base.



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# File 'lib/phantom/base.rb', line 5

def initialize(pid)
  @pid = pid.nil? ? nil : pid.to_i
end

Instance Attribute Details

#pid ⇒ Object (readonly)

Returns the value of attribute pid.



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# File 'lib/phantom/base.rb', line 3

def pid
  @pid
end

Instance Method Details

#abort! ⇒ Object 



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# File 'lib/phantom/base.rb', line 33

def abort!
  kill(:ABRT) if alive?
end

#alive? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/phantom/base.rb', line 66

def alive?
  !dead?
end

#continue ⇒ Object Also known as: resume 



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# File 'lib/phantom/base.rb', line 49

def continue
  if alive?
    kill(:CONT)
    @status = Phantom::Status::ALIVE
  end
end

#dead? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/phantom/base.rb', line 70

def dead?
  status == Phantom::Status::DEAD
end

#gid ⇒ Object 



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# File 'lib/phantom/base.rb', line 17

def gid
  @gid ||= Process.getpgid(@pid)
end

#group_priority ⇒ Object 



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# File 'lib/phantom/base.rb', line 25

def group_priority
  @group_priority ||= Process.getpriority(Process::PRIO_PGRP, @pid)
end

#kill(signal) ⇒ Object 



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# File 'lib/phantom/base.rb', line 9

def kill(signal)
  Process.kill(signal, @pid) if @pid
end

#process_priority ⇒ Object 



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# File 'lib/phantom/base.rb', line 29

def process_priority
  @process_priority ||= Process.getpriority(Process::PRIO_PROCESS, @pid)
end

#sid ⇒ Object 



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# File 'lib/phantom/base.rb', line 13

def sid
  @sid ||= Process.getsid(@pid)
end

#status ⇒ Object 



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# File 'lib/phantom/base.rb', line 57

def status
  begin
    Process.kill(0, @pid)
    return @status ||= Phantom::Status::ALIVE
  rescue Errno::ESRCH
    return @status = Phantom::Status::DEAD
  end
end

#stop ⇒ Object Also known as: pause 



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# File 'lib/phantom/base.rb', line 41

def stop
  if alive?
    kill(:STOP)
    @status = Phantom::Status::PAUSED
  end
end

#terminate ⇒ Object 



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# File 'lib/phantom/base.rb', line 37

def terminate
  kill(:TERM) if alive?
end

#user_priority ⇒ Object 



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# File 'lib/phantom/base.rb', line 21

def user_priority
  @user_priority ||= Process.getpriority(Process::PRIO_USER, @pid)
end