class Rx::Plan

Public Class Methods

new(expression, selector) click to toggle source
# File lib/rx/joins/plan.rb, line 3
def initialize(expression, selector)
  @expression = expression
  @selector = selector
end

Public Instance Methods

activate(external_subscriptions, observer, deactivate) click to toggle source
# File lib/rx/joins/plan.rb, line 8
def activate(external_subscriptions, observer, deactivate)
  join_observers = []
  @expression.patterns.each {|pat|
    join_observers.push plan_create_observer(external_subscriptions, pat, observer.method(:on_error))
  }

  active_plan = ActivePlan.new(join_observers, lambda {|*args|
    begin
      result = @selector.call(*args)
    rescue => e
      observer.on_error e
    end
    observer.on_next result
  },
  lambda {
    join_observers.each {|v|
      v.remove_active_plan(active_plan)
    }
    deactivate.call(active_plan)
  })
  join_observers.each {|v|
    v.add_active_plan(active_plan)
  }
  return active_plan
end
plan_create_observer(external_subscriptions, observable, on_error) click to toggle source
# File lib/rx/joins/plan.rb, line 34
def plan_create_observer(external_subscriptions, observable, on_error)
  entry = external_subscriptions[observable]
  if !entry
    observer = JoinObserver.new(observable, on_error)
    external_subscriptions[observable] = observer
    return observer
  end
  entry
end