Class: Callback::CallbackContainer

Inherits:
Object
  • Object
show all
Defined in:
lib/spec/callback/callback_container.rb

Instance Method Summary collapse

Constructor Details

#initialize ⇒ CallbackContainer

Returns a new instance of CallbackContainer.



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# File 'lib/spec/callback/callback_container.rb', line 3

def initialize
  @callback_registry = Hash.new do |hash, key|
    hash[key] = Array.new
  end
end

Instance Method Details

#clear ⇒ Object

Clears all of the callbacks in this container.



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# File 'lib/spec/callback/callback_container.rb', line 42

def clear
  @callback_registry.clear
end

#define(key, callback_proc = nil, &callback_block) ⇒ Object

Defines the callback with the key in this container.



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# File 'lib/spec/callback/callback_container.rb', line 10

def define(key, callback_proc=nil, &callback_block)
  callback = extract_callback(callback_block, callback_proc) do
    raise "You must define the callback that accepts the call method."
  end
  @callback_registry[key] << callback
  callback
end

#notify(key, *args, &error_handler) ⇒ Object

Notifies the callbacks for the key. Arguments may be passed. An error handler may be passed in as a block. If there is an error, the block is called with error object as an argument. An array of the return values of the callbacks is returned.



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# File 'lib/spec/callback/callback_container.rb', line 31

def notify(key, *args, &error_handler)
  @callback_registry[key].collect do |callback|
    begin
      callback.call(*args)
    rescue Exception => e
      yield(e) if error_handler
    end
  end
end

#undefine(key, callback_proc) ⇒ Object

Undefines the callback with the key in this container.



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# File 'lib/spec/callback/callback_container.rb', line 19

def undefine(key, callback_proc)
  callback = extract_callback(callback_proc) do
    raise "You may only undefine callbacks that use the call method."
  end
  @callback_registry[key].delete callback
  callback
end