nested_contexts.rb

#
#   Simple Context Example:
#
$LOAD_PATH.unshift File.expand_path(File.join(File.dirname(__FILE__), "..", "lib"))

require 'hybrid_dci'

Foo = Struct.new(:name) do
  include HybridDCI::Data  
end

class NestedContexts
  include HybridDCI::Context

  role :greeter do
    contract :name

    def say_hi
      puts "Hello there! says #{name}"
    end
  end

  role :goodbye_guy do
    contract :name

    def say_bye
      puts "Goodbye! says #{name}"
    end
  end

  def initialize(obja, objb)
    bind_roles(:greeter => obja, :goodbye_guy=> objb)
  end

  def nest_execute
    in_context do
      greeter(:call).say_hi
      goodbye_guy(:call).say_bye      
      NestedContexts.new( goodbye_guy , greeter  ).execute
    end
    
  end
  
  def execute
    in_context do
      greeter(:call).say_hi
      goodbye_guy(:call).say_bye      
    end
  end
end
a = Foo.new("bob")
b = Foo.new("john")

context = NestedContexts.new(a,b)
context.nest_execute

# => nil

# >> Hello there! says bob
# >> Goodbye! says john
# >> Hello there! says john
# >> Goodbye! says bob