Thread gem - Speaker Deck

Thread gem

by Lukas Rieder

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Threads

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thread gem by @meh

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Thread#every

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do something every n seconds

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lets implement something relevant

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class Life! ! def self.why?! ! ! sleep(rand(5))! ! ! raise "" unless give_answer?! ! ! "answer: #{rand(42)}"! ! end! ! ! def self.give_answer?! ! ! rand(2) > 0 ? true : false! ! end! ! end

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class Life! ! def self.why?! ! ! sleep(rand(5))! ! ! raise "" unless give_answer?! ! ! "answer: #{rand(42)}"! ! end! ! ! def self.give_answer?! ! ! rand(2) > 0 ? true : false! ! end! ! end

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class Life! ! def self.why?! ! ! sleep(rand(5))! ! ! raise "" unless give_answer?! ! ! "answer: #{rand(42)}"! ! end! ! ! def self.give_answer?! ! ! rand(2) > 0 ? true : false! ! end! ! end

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Life.why?! !

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Life.why?! # …waiting…!

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Life.why?! # …waiting…! # RuntimeError:

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relaxed life

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accept nil! as an answer!

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class RelaxedLife! ! def self.why?! @every ||= Thread.every(60) do! Life.why?! end! @every.gimme_value! || "go have fun"! end! ! end

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class RelaxedLife! ! def self.why?! @every ||= Thread.every(60) do! Life.why?! end! @every.gimme_value! || "go have fun"! end! ! end

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require "thread/every"! ! class Thread::Every! ! def gimme_value!! @mutex.synchronize do! @old = true! @value! end! end! ! end

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require "thread/every"! ! class Thread::Every! ! def gimme_value!! @mutex.synchronize do! @old = true! @value! end! end! ! end

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require "thread/every"! ! class Thread::Every! ! def gimme_value!! @mutex.synchronize do! @old = true! @value! end! end! ! end

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RelaxedLife.why?!

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RelaxedLife.why?! # …waiting…!

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RelaxedLife.why?! # …waiting…! # => "go have fun"!

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RelaxedLife.why?! # …waiting…! # => "go have fun"! RelaxedLife.why?! # => 8!

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RelaxedLife.why?! # …waiting…! # => "go have fun"! RelaxedLife.why?! # => 8! RelaxedLife.why?! # => 8!

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RelaxedLife.why?! # …waiting…! # => "go have fun"! RelaxedLife.why?! # => 8! RelaxedLife.why?! # => 8! RelaxedLife.why?! # => 41!

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RelaxedLife.why?! # …waiting…! # => "go have fun"! RelaxedLife.why?! # => 8! RelaxedLife.why?! # => 8! RelaxedLife.why?! # => 41! RelaxedLife.why?! # …

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