Introduction into
Aggregates

Benifits

• Easy to build
• Everyone familiar with such approach
• Best for CRUD-like applications

Drawbacks

• Hard to change (high coupling)
• Mix of read and write responsibilities

Bounded Context

https://martinfowler.com/bliki/BoundedContext.html

How to Not create an aggregate

<?php

$order = new Order($customer, $orderLines);

Aggregate Root as previous state

<?php

$basket = $customer->pickUpBasket();
$basket->put($product1->reserve(2)); // creates BasketItem
$basket->put($product2->reserve(1)); // creates BasketItem


$order = $basket->proceedToCheckout($shippingInformation);

Saga

https://msdn.microsoft.com/en-us/library/jj591569.aspx