Aquarium Hello world

gistfile1.rb

require 'aquarium'
include Aquarium::Aspects

class A
  def f
    puts 'A#f'
  end

  def g
    puts 'A#g'
  end
end

Aspect.new :around, :calls_to => :all_methods, :for_types => [A], :method_options => :exclude_ancestor_methods do |join_point, object, *args|
    p "Entering: #{join_point.target_type.name}##{join_point.method_name} for object #{object}"
    result = join_point.proceed
    p "Leaving: #{join_point.target_type.name}##{join_point.method_name} for object #{object}"
    result  # block needs to return the result of the "proceed"!
end

a = A.new
puts a.f.inspect
puts a.g.inspect

Result:

"Entering: A#f for object #<A:0x007f882296c718>"
A#f
"Leaving: A#f for object #<A:0x007f882296c718>"
"Entering: A#g for object #<A:0x007f882296c718>"
A#g
"Leaving: A#g for object #<A:0x007f882296c718>"