Module: Concurrent::Concern::Obligation

Includes:
Dereferenceable
Included in:
Delay, IVar
Defined in:
lib/concurrent/concern/obligation.rb

Instance Method Summary collapse

Instance Method Details

#complete? ⇒ Boolean

Has the obligation completed processing?

Returns:

  • (Boolean) 


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# File 'lib/concurrent/concern/obligation.rb', line 49

def complete?
  [:fulfilled, :rejected].include? state
end

#exception(*args) ⇒ undocumented

Examples:

allows Obligation to be risen

rejected_ivar = Ivar.new.fail
raise rejected_ivar


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# File 'lib/concurrent/concern/obligation.rb', line 126

def exception(*args)
  raise 'obligation is not rejected' unless rejected?
  reason.exception(*args)
end

#fulfilled? ⇒ Boolean Also known as: realized?

Has the obligation been fulfilled?

Returns:

  • (Boolean) 


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# File 'lib/concurrent/concern/obligation.rb', line 20

def fulfilled?
  state == :fulfilled
end

#incomplete? ⇒ Boolean

Is the obligation still awaiting completion of processing?

Returns:

  • (Boolean) 


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# File 'lib/concurrent/concern/obligation.rb', line 56

def incomplete?
  ! complete?
end

#pending? ⇒ Boolean

Is obligation completion still pending?

Returns:

  • (Boolean) 


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# File 'lib/concurrent/concern/obligation.rb', line 35

def pending?
  state == :pending
end

#reason ⇒ Exception

If an exception was raised during processing this will return the exception object. Will return nil when the state is pending or if the obligation has been successfully fulfilled.

Returns:

  • (Exception) —

    the exception raised during processing or nil



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# File 'lib/concurrent/concern/obligation.rb', line 119

def reason
  synchronize { @reason }
end

#rejected? ⇒ Boolean

Has the obligation been rejected?

Returns:

  • (Boolean) 


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# File 'lib/concurrent/concern/obligation.rb', line 28

def rejected?
  state == :rejected
end

#state ⇒ Symbol

The current state of the obligation.

Returns:

  • (Symbol) —

    the current state



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# File 'lib/concurrent/concern/obligation.rb', line 110

def state
  synchronize { @state }
end

#unscheduled? ⇒ Boolean

Is the obligation still unscheduled?

Returns:

  • (Boolean) 


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# File 'lib/concurrent/concern/obligation.rb', line 42

def unscheduled?
  state == :unscheduled
end

#value(timeout = nil) ⇒ Object

The current value of the obligation. Will be nil while the state is pending or the operation has been rejected.

Parameters:

  • timeout (Numeric) (defaults to: nil) —

    the maximum time in seconds to wait.

Returns:

  • (Object) —

    see Dereferenceable#deref



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# File 'lib/concurrent/concern/obligation.rb', line 65

def value(timeout = nil)
  wait timeout
  deref
end

#value!(timeout = nil) ⇒ Object

The current value of the obligation. Will be nil while the state is pending or the operation has been rejected. Will re-raise any exceptions raised during processing (but will not raise an exception on timeout).

Parameters:

  • timeout (Numeric) (defaults to: nil) —

    the maximum time in seconds to wait.

Returns:

  • (Object) —

    see Dereferenceable#deref

Raises:

  • (Exception) —

    raises the reason when rejected



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# File 'lib/concurrent/concern/obligation.rb', line 98

def value!(timeout = nil)
  wait(timeout)
  if rejected?
    raise self
  else
    deref
  end
end

#wait(timeout = nil) ⇒ Obligation

Wait until obligation is complete or the timeout has been reached.

Parameters:

  • timeout (Numeric) (defaults to: nil) —

    the maximum time in seconds to wait.

Returns:



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# File 'lib/concurrent/concern/obligation.rb', line 74

def wait(timeout = nil)
  event.wait(timeout) if timeout != 0 && incomplete?
  self
end

#wait!(timeout = nil) ⇒ Obligation Also known as: no_error!

Wait until obligation is complete or the timeout is reached. Will re-raise any exceptions raised during processing (but will not raise an exception on timeout).

Parameters:

  • timeout (Numeric) (defaults to: nil) —

    the maximum time in seconds to wait.

Returns:

Raises:

  • (Exception) —

    raises the reason when rejected



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# File 'lib/concurrent/concern/obligation.rb', line 86

def wait!(timeout = nil)
  wait(timeout).tap { raise self if rejected? }
end