mariorez

import com.soywiz.korge.*
import com.soywiz.korge.html.*
import com.soywiz.korge.view.*
import com.soywiz.korim.color.*
import com.soywiz.korim.font.*
import com.soywiz.korim.format.*
import com.soywiz.korio.file.std.*
import com.soywiz.korma.geom.*
import com.soywiz.korma.geom.vector.*

mariorez

subscriber.receive(_) >> { throw new InternalError("ouch") }

mariorez

given:
def stack = new Stack()

when:
stack.pop()

then:
thrown(EmptyStackException)
stack.empty

mariorez

subscriber.receive(_) >> "ok"
|          |       |     |
|          |       |     gerador de resposta
|          |       argumento de restrição
|          método de restrição
objeto de restrição

mariorez

class Publisher {
    private Subscriber subscriber

    Publisher(Subscriber subscriber) {
        this.subscriber = subscriber
    }

    String sendAndGetStatus(String message) {
        return subscriber.receive(message)
    }

mariorez

1 * subscriber1.receive("hello")
|   |           |       |
|   |           |       restrição de argumento
|   |           restrição de método
|   restrição de alvo
restrição por cardinalidade

mariorez

class Publisher {
  List<Subscriber> subscribers = []
  void send(String message){
    subscribers*.receive(message)
  }
}

interface Subscriber {
  void receive(String message)
}

mariorez

Subscriber subscriber1 = Mock()
Subscriber subscriber2 = Mock()

mariorez

def subscriber1 = Mock(Subscriber)
def subscriber2 = Mock(Subscriber)

mariorez

If you have two days to learn the very basics of modelling, Domain-Driven Design, CQRS and Event Sourcing, here's what you should do:

In the evenings read the [Domain-Driven Design Quickly Minibook]{http://www.infoq.com/minibooks/domain-driven-design-quickly}. During the day watch following great videos (in this order):

1. Eric Evans' [What I've learned about DDD since the book]{http://www.infoq.com/presentations/ddd-eric-evans}
2. Eric Evans' [Strategic Design - Responsibility Traps]{http://www.infoq.com/presentations/design-strategic-eric-evans}
3. Udi Dahan's [Avoid a Failed SOA: Business & Autonomous Components to the Rescue]{http://www.infoq.com/presentations/SOA-Business-Autonomous-Components}
4. Udi Dahan's [Command-Query Responsibility Segregation]{http://www.infoq.com/presentations/Command-Query-Responsibility-Segregation}
5. Greg Young's [Unshackle Your Domain]{http://www.infoq.com/presentations/greg-young-unshackle-qcon08}
6. Eric Evans' [Acknowledging CAP at the Root -- in the Domain Model]{ht