Module: Elixir::Agent

Defined in:
lib/elixir/agent.rb

Class Method Summary collapse

Class Method Details

.cast(agent, &fun) ⇒ Object 



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# File 'lib/elixir/agent.rb', line 7

def cast agent, &fun
  agent.try_update do |value|
    ->{ fun.call value.call }
  end

  :ok
end

.get(agent, &fun) ⇒ Object 



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# File 'lib/elixir/agent.rb', line 15

def get agent, &fun
  fun.call agent.get.call
end

.get_and_update(agent, &fun) ⇒ Object 



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# File 'lib/elixir/agent.rb', line 19

def get_and_update agent, &fun
  old_lambda = agent.get
  old_value = old_lambda.call
  new_lambda = ->{ fun.call old_value }
  agent.compare_and_set old_lambda, new_lambda

  old_value
end

.start(&fun) ⇒ Object 



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# File 'lib/elixir/agent.rb', line 28

def start &fun
  [:ok, Concurrent::Atomic.new(fun)]
end

.update(agent, &fun) ⇒ Object 



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# File 'lib/elixir/agent.rb', line 32

def update agent, &fun
  agent.update do |value|
    ->{ fun.call value.call }
  end

  :ok
end