Post on 13-Apr-2017
transcript
DOMAIN DRIVENDESIGN
CO JE TO MODEL?
CO JE TO MODEL?(užitečné) zjednodušení "reality"
ARCHITEKTURAWEBOVÉ APLIKACE
UI layer
Application layer
Domain layer
Persistence layer
Storage
CO JE DOMÉNOVÝMODEL?
<?php
namespace App\Model;
class Client extends Entity // ...
„Zygohistomorphic Prepromorphisms“
„Dual Overhead Rate Recovery“
„It's Lupus“
UBIQUITOUSLANGUAGE
anglicky!
platí v nějakém kontextu
VALUE OBJECTAddress
$street Pernerova 53
$city Praha 8
$zipCode 186 00
VALUE OBJECTIMMUTABLE
public function changeZipCode($newZipCode) return new Address( $this>street, $this>city, $newZipCode );
ENTITYPerson
$id 1
$name John Doe
$email john@doe.com
ENTITYVALIDACE
$validator>isValid($person);
$person>isValid();
public function __construct($name) $this>name = $name;
ENTITYANEMIC MODEL
if ($person>getAge() >= 18) $originalName = $person>getOriginalName(); $person>setName($newName); $person>setOriginalName($originalName);
ENTITYANEMIC MODEL
public function rename($newName) if ($this>age < 18) throw new \Exception;
$this>originalName = $this>name; $this>name = $newName;
$person>rename($newName);
ENTITYANEMIC MODEL
AGGREGATE
FACTORYinterface ICustomerFactory /** * @param string $name * @param Address $address * @returns Customer */ function create($name, Address $address);
BOUNDED CONTEXTclass Order extends Entity // ...
class Product extends Entity // ...
BOUNDED CONTEXT
-- Martin Fowler
BOUNDED CONTEXTcore domainsupporting subdomaingeneric subdomain
REPOSITORY$repository = [];$repository[$product>getId()] = $product;
interface IProductsRepository function save(Product $product); // make it explicit!
function getById($id); // return whole aggregate!
function delete($id);
@ChangeTrackingPolicy("DEFERRED_EXPLICIT")
SERVICEstatelesssingletonSRP!
DOMAIN EVENTobjektne commandimmutableobsahuje datamůže implementovat interface
CO SI ZAPAMATOVATmake it explicitdefinujte slovníkrozlišujte kontextvyhněte se anemickému modelu
ZDROJE KE STUDIU
ZDROJE KE STUDIUDomain-Driven Design: Tackling Complexity in the Heart of
Software (Eric Evans)
ZDROJE KE STUDIUImplementing Domain-Driven Design (Vaughn Vernon)
ZDROJE KE STUDIUStackOverflow.comgoogle
DĚKUJI