Simple is Good, Complex is Bad

Talk given at New York for CakeFest 2015

Transcript

1. Simple is good, complex is baaad Mariano Iglesias - @mgiglesias mariano@php.net #CakeFest 2015
2. Frameworks make us stupid
4. A story of how I got into PHP frameworks
5. From CGI with C, to Perl, to Java, to... PHP
6. $table = new table(); $table->openRow(); $table->addCell('I want to die'); $table->addCell(new image('delete.png')); $table->closeRow();
7. Just because you used classes, interfaces, and namespaces it doesn't mean it's not spaghetti #FACT
8. $ rm -rf /var/www
12. CakePHP was MVC … and MVC was cool
13. So it's all good... right?
14. “If I could create Symfony from scratch today, I'd do it totally different.” Fabien Potencier
15. “MVC, MVVM, ADR, are all bad jokes. They solve the easy problem, and forget about the hard one.” Anthony Ferrara
16. “Frameworks? They all suck.” Rasmus Lerdorf
17. So something's going on...
20. Let's break it down
22. One way to do things
26. Hidden Complexity
27. Sendgrid Customer.io DB REST app
28.  Laravel: 273k lines, 0.19 complexity.  Silex + Doctrine: 109k lines, 0.19 complexity.  Slim + Illuminate (ORM): 42k lines, 0.15 complexity.  Slim + PDO: 21k lines, 0.13 complexity
29. WTH? No Lumen?
30.  "illuminate/auth": "5.0.*",  "illuminate/bus": "5.0.*",  "illuminate/config": "5.0.*",  "illuminate/container": "5.0.*",  "illuminate/contracts": "5.0.*",  "illuminate/cache": "5.0.*",  "illuminate/console": "5.0.*",  "illuminate/cookie": "5.0.*",  "illuminate/database": "5.0.*",  "illuminate/encryption": "5.0.*",  "illuminate/events": "5.0.*",  "illuminate/filesystem": "5.0.*",  "illuminate/hashing": "5.0.*",  "illuminate/http": "5.0.*",  "illuminate/pagination": "5.0.*",  "illuminate/queue": "5.0.*",  "illuminate/session": "5.0.*",  "illuminate/support": "5.0.*",  "illuminate/translation": "5.0.*",  "illuminate/validation": "5.0.*",  "illuminate/view": "5.0.*",  "monolog/monolog": "~1.0",  "mtdowling/cron-expression": "~1.0",  "nikic/fast-route": "0.4.*",  "symfony/http-kernel": "2.6.*",  "symfony/http-foundation": "2.6.*",  "symfony/security-core": "2.6.*",  "symfony/var-dumper": "2.6.*"
31. It's more than just the # of lines
36. Technical debt to bring them all and in the darkness bind them
38. What do we do?
39. Now, there's this thing...
41.  Write programs that do one thing, and do it well.  Write programs to work together.  Write programs to handle text streams, because that is a universal interface. Doug McIlroy, inventor of the Unix pipe
44. The more your application grows, the more you'll want to break it into pieces (aka SOA) #FACT
45. Does this mean I should stop using CakePHP?
46. NO but...
47. I'm coding a CakePHP application I'm coding an application with CakePHP
48. Decouple your domain from infrastructure
49. Focus on your own problems
50. Ok I'm sold. How do I get there?
51.  Use Disque/Gearman/RabbitMQ to implement worker queues.  Does it all have to be PHP? No, use the right tool for each job.
52. DECOUPLE (I know, I've said this before)
53. Start with your domain (aka entities)
54. class ArticleTable extends \Cake\ORM\Table { } class Article extends \Cake\ORM\Entity { } class ArticlesController extends \Cake\Controller\Controller { public function index() { $table = TableRegistry::get('Articles'); $query = $table->find()->where(['active' => 1]); $this->set('articles', $query->toArray()); } }
55. interface ArticleInterface { public function getTitle(); public function setAuthor(Author $author); } interface ArticleRepositoryInterface { public function add(ArticleInterface $article); public function getActive(); } class Article implements ArticleInterface { // Don't make me dumb... } Pure Object (Not a Cake\Entity)
56. use Domain\Repository\ArticleRepositoryInterface; use Domain\Entity\Article; class ArticleRepository extends Table implements ArticleRepositoryInterface { public function initialize(array $config) { $this->entityClass(Article::class); } public function add(ArticleInterface $article) { } public function getActive() { return $this->find()->where(['active' => 1]); } }
57. But this is no longer a Cake entity!
59. Use DI (I prefer Aura.DI)
61.  Look for a package in packagist.org  Found one but misses something? Collaborate.  Nothing there? Create (and submit) your own.
62. Your framework should...
63.  Use semantic versioning  Split itself into components  Decouple its components  Use standards (PSR-7 pretty please)  Have security reporting & disclosure procedures (PSR-9 and PSR-10)
64. Frameworks make us smart
65. Questions? #CakeFest2015 @mgiglesias - mariano@php.net
66. BONUS #CakeFest2015
67. PHP The Right Way