class MrDarcy::Context
Attributes
deferred[RW]
driver[RW]
Public Class Methods
action(action_name, &block)
click to toggle source
Defines an action that can be performed in this context.
-
action_name: essentially the name of the method defined in this class.
Takes a block with which to define the action.
# File lib/mr_darcy/context.rb, line 26 def action action_name, &block define_method action_name do |*args| self.then do |value| self.instance_exec(*args, &block) end self end end
new(role_players={})
click to toggle source
Create an instance of the context. You must pass in role-players for all roles defined in this context using a single hash argument of role names (as symbols) to objects.
eg:
BankTransfer.new money_source: account1, money_destination: account2
# File lib/mr_darcy/context.rb, line 48 def initialize role_players={} @driver = role_players.delete(:driver) || MrDarcy.driver @deferred = Deferred.new(driver: driver) deferred.resolve nil roles = self.class.roles roles.each do |role_name, role| player = role_players[role_name] Kernel::raise ArgumentError, "No role player for #{role_name} supplied" unless player role.pollute(player) self.singleton_class.send :define_method, role_name do player end end end
role(role_name, options={})
click to toggle source
Defines a role to be mixed into the roll-player when this context is initialized.
See MrDarcy::Role#initialize for argument definitions.
# File lib/mr_darcy/context.rb, line 16 def role role_name, options={}, &block self.roles[role_name] = Role.new(role_name, options, &block) end
roles()
click to toggle source
A list of available roles in this context.
# File lib/mr_darcy/context.rb, line 36 def roles @roles ||= {} end
Public Instance Methods
fail(&block)
click to toggle source
See MrDarcy::Promise::Base#fail
# File lib/mr_darcy/context.rb, line 75 def fail &block deferred.fail do |value| self.instance_exec(value, &block) end self end
final()
click to toggle source
See MrDarcy::Promise::Base#final
# File lib/mr_darcy/context.rb, line 83 def final deferred.final self end
then(&block)
click to toggle source
See MrDarcy::Promise::Base#then
# File lib/mr_darcy/context.rb, line 67 def then &block deferred.then do |value| self.instance_exec(value, &block) end self end