Synchronization::LockableObject
A thread safe observer set implemented using copy-on-read approach: observers are added and removed from a thread safe collection; every time a notification is required the internal data structure is copied to prevent concurrency issues
@api private
@!macro observable_add_observer
# File lib/concurrent/collection/copy_on_notify_observer_set.rb, line 20 def add_observer(observer = nil, func = :update, &block) if observer.nil? && block.nil? raise ArgumentError, 'should pass observer as a first argument or block' elsif observer && block raise ArgumentError.new('cannot provide both an observer and a block') end if block observer = block func = :call end synchronize do @observers[observer] = func observer end end
@!macro observable_count_observers
# File lib/concurrent/collection/copy_on_notify_observer_set.rb, line 55 def count_observers synchronize { @observers.count } end
@!macro observable_delete_observer
# File lib/concurrent/collection/copy_on_notify_observer_set.rb, line 39 def delete_observer(observer) synchronize do @observers.delete(observer) observer end end
@!macro observable_delete_observers
# File lib/concurrent/collection/copy_on_notify_observer_set.rb, line 47 def delete_observers synchronize do @observers.clear self end end
Notifies all registered observers with optional args and deletes them.
@param [Object] args arguments to be passed to each observer @return [CopyOnWriteObserverSet] self
# File lib/concurrent/collection/copy_on_notify_observer_set.rb, line 72 def notify_and_delete_observers(*args, &block) observers = duplicate_and_clear_observers notify_to(observers, *args, &block) self end
Notifies all registered observers with optional args @param [Object] args arguments to be passed to each observer @return [CopyOnWriteObserverSet] self
# File lib/concurrent/collection/copy_on_notify_observer_set.rb, line 62 def notify_observers(*args, &block) observers = duplicate_observers notify_to(observers, *args, &block) self end
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