Class: Tribe::Future
- Inherits:
-
Object
- Object
- Tribe::Future
- Defined in:
- lib/tribe/future.rb
Instance Method Summary collapse
- #failure(&block) ⇒ Object
- #failure? ⇒ Boolean
- #finished? ⇒ Boolean
-
#initialize(actor = nil) ⇒ Future
constructor
A new instance of Future.
- #result ⇒ Object
- #result=(val) ⇒ Object
- #success(&block) ⇒ Object
- #success? ⇒ Boolean
- #timeout ⇒ Object
- #timeout=(val) ⇒ Object
- #timeout? ⇒ Boolean
- #wait ⇒ Object
Constructor Details
#initialize(actor = nil) ⇒ Future
Returns a new instance of Future.
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# File 'lib/tribe/future.rb', line 3 def initialize(actor = nil) @state = :initialized @lock = Mutex.new @condition = ConditionVariable.new @result = nil @success_callback = nil @failure_callback = nil @actor = actor return nil end |
Instance Method Details
#failure(&block) ⇒ Object
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# File 'lib/tribe/future.rb', line 116 def failure(&block) @lock.synchronize do case @state when :initialized @failure_callback = block when :finished if @result.is_a?(Exception) if @actor @actor.perform! do block.call(@result) end else block.call(@result) end end else raise Tribe::FutureError.new('Invalid state.') end return nil end end |
#failure? ⇒ Boolean
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# File 'lib/tribe/future.rb', line 89 def failure? return !success? end |
#finished? ⇒ Boolean
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# File 'lib/tribe/future.rb', line 15 def finished? @lock.synchronize do return @state == :finished end end |
#result ⇒ Object
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# File 'lib/tribe/future.rb', line 63 def result @lock.synchronize do raise Tribe::FutureNoResult.new('Result must be set first.') unless @state == :finished return @result end end |
#result=(val) ⇒ Object
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# File 'lib/tribe/future.rb', line 27 def result=(val) @lock.synchronize do return unless @state == :initialized @timer.cancel if @timer @result = val @state = :finished @condition.signal if val.is_a?(Exception) if @failure_callback if @actor @actor.perform! do @failure_callback.call(val) end else @failure_callback.call(val) end end else if @success_callback if @actor @actor.perform! do @success_callback.call(val) end else @success_callback.call(val) end end end return nil end end |
#success(&block) ⇒ Object
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# File 'lib/tribe/future.rb', line 93 def success(&block) @lock.synchronize do case @state when :initialized @success_callback = block when :finished unless @result.is_a?(Exception) if @actor @actor.perform! do block.call(@result) end else block.call(@result) end end else raise Tribe::FutureError.new('Invalid state.') end return nil end end |
#success? ⇒ Boolean
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# File 'lib/tribe/future.rb', line 81 def success? @lock.synchronize do raise Tribe::FutureNoResult.new('Result must be set first.') unless @state == :finished return !@result.is_a?(Exception) end end |
#timeout ⇒ Object
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# File 'lib/tribe/future.rb', line 139 def timeout @lock.synchronize do @timeout end end |
#timeout=(val) ⇒ Object
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# File 'lib/tribe/future.rb', line 145 def timeout=(val) raise Tribe::FutureError.new('Timeout may only be set once.') if @timeout @timeout = val @timer = Workers::Timer.new(val) do begin raise Tribe::FutureTimeout.new("Timeout after #{@timeout} seconds.") rescue Tribe::FutureTimeout => e self.result = e end end end |
#timeout? ⇒ Boolean
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# File 'lib/tribe/future.rb', line 21 def timeout? @lock.synchronnize do return @state == :finished && @result.is_a?(Tribe::FutureTimeout) end end |
#wait ⇒ Object
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# File 'lib/tribe/future.rb', line 71 def wait @lock.synchronize do return if @state == :finished @condition.wait(@lock) return nil end end |