Why Lithium Sucks...

... Less than your Framework

Inspired by @nateabele and @jperras talk: http://www.slideshare.net/nateabele/lithium-the-framework-for-people-who-hate-frameworks

Transcript

1. Why Lithium sucks MEHDI LAHMAM B. @mehlah
2. Why Lithium sucks Less than your framework
3. I’m Mehdi
4. Object dependencies “The principle of separating configuration from use”
5. function initialize(&$controller, $settings = []) { //... $prefixes = Router::prefixes(); if (!empty($prefixes)) { foreach ($prefixes as $prefix) { // do something with the global state ... } } if (Configure::read() > 0) { App::import('Debugger'); Debugger::checkSecurityKeys(); } } Sucks Sucks hard !
6. Configuration
7. function spam($emails) { $this->Email->subject = 'Welcome to our really cool thing'; $this->Email->replyTo = 'support@example.com'; $this->Email->from = 'Cool Web App <app@example.com>'; $this->Email->template = 'simple_message'; $this->Email->sendAs = 'both'; foreach ($emails as $email) { $this->Email->to = $email['address']; $this->Email->subject = "Special offer for {$email['name']}"; $this->Email->send(); } } Sucks
8. Dependency Injection
9. class User { function __construct($storage) { $this->storage = $storage; } // ... } $storage = new SessionStorage('SESSION_ID'); $user = new User($storage); Show that object who’s boss !
10. Of course, we want to abstract this
11. Of course, we want to abstract this Frameworks, adore abstraction
12. Of course, we want to abstract this Frameworks, adore abstraction Fabien
13. A DI story, in 6 parts
14. $transport = new Zend_Mail_Transport_Smtp('smtp.gmail.com', array( 'auth' => 'login', 'username' => 'foo', 'password' => 'bar', 'ssl' => 'ssl', 'port' => 465, )); $mailer = new Zend_Mail(); $mailer->setDefaultTransport($transport);
15. DI Container to the rescue !
16. class Container { public function getMailTransport() { return new Zend_Mail_Transport_Smtp('smtp.gmail.com', array( 'auth' => 'login', 'username' => 'foo', 'password' => 'bar', 'ssl' => 'ssl', 'port' => 465, )); } public function getMailer() { $mailer = new Zend_Mail(); $mailer->setDefaultTransport($this->getMailTransport()); return $mailer; } }
17. class Container { public function getMailTransport() { return new Zend_Mail_Transport_Smtp('smtp.gmail.com', array( 'auth' => 'login', 'username' => 'foo', 'password' => 'bar', 'ssl' => 'ssl', 'port' => 465, )); } public function getMailer() { $mailer = new Zend_Mail(); $mailer->setDefaultTransport($this->getMailTransport()); return $mailer; } } $container = new Container(); $mailer = $container->getMailer();
18. class Container { protected $parameters = array(); public function __construct(array $parameters = array()) { $this->parameters = $parameters; } public function getMailTransport() { return new Zend_Mail_Transport_Smtp('smtp.gmail.com', array( 'auth' => 'login', 'username' => $this->parameters['mailer.username'], 'password' => $this->parameters['mailer.password'], 'ssl' => 'ssl', 'port' => 465, )); } public function getMailer() { $mailer = new Zend_Mail(); $mailer->setDefaultTransport($this->getMailTransport()); return $mailer; } }
19. $container = new Container(array( 'mailer.username' => 'foo', 'mailer.password' => 'bar', )); $mailer = $container->getMailer();
20. The Dependency Injection Container in Symfony is managed by a class named sfServiceContainer. Fabien
21. class Container extends sfServiceContainer { static protected $shared = array(); protected function getMailTransportService() { return new Zend_Mail_Transport_Smtp('smtp.gmail.com', array( 'auth' => 'login', 'username' => $this['mailer.username'], 'password' => $this['mailer.password'], 'ssl' => 'ssl', 'port' => 465, )); } protected function getMailerService() { if (isset(self::$shared['mailer'])) { return self::$shared['mailer']; } $class = $this['mailer.class']; $mailer = new $class(); $mailer->setDefaultTransport($this->getMailTransportService()); return self::$shared['mailer'] = $mailer; } }
22. Of course now you want to abstract the crap out of the Service Container. http://fabien.potencier.org/article/13/introduction-to-the-symfony-service-container
23. So let’s use a Builder to configure Services.
24. require_once 'PATH/TO/sf/lib/sfServiceContainerAutoloader.php'; sfServiceContainerAutoloader::register(); $sc = new sfServiceContainerBuilder(); $sc-> register('mail.transport', 'Zend_Mail_Transport_Smtp')-> addArgument('smtp.gmail.com')-> addArgument(array( 'auth' => 'login', 'username' => '%mailer.username%', 'password' => '%mailer.password%', 'ssl' => 'ssl', 'port' => 465, ))-> setShared(false) ; $sc-> register('mailer', '%mailer.class%')-> addMethodCall('setDefaultTransport', array(new sfServiceReference('mail.transport'))) ;
25. And for good mesure, have our configurations for Service Containers in XML files.
26. So ... we have Dependency Injection
27. So ... we have Dependency Injection Managed by a Service Container
28. So ... we have Dependency Injection Managed by a Service Container Parametrized with XML data (or YAML for cool boys)
29. So ... we have Dependency Injection Managed by a Service Container Parametrized with XML data (or YAML for cool boys) And the whole thing configured by a Builder
30. So ... we have Dependency Injection Managed by a Service Container Parametrized with XML data (or YAML for cool boys) And the whole thing configured by a Builder ... to fix one problem.
31. Doh !
32. Lithium tries to suck less
33. Consistency
34. namespace app\foo; use lithium\util\String; use lithium\util\Collection; class Foo extends \lihtium\core\Object { protected $_classes = [ 'logger' => 'lithium\analysis\Logger', 'cache' => 'lithium\storage\Cache' ]; public function __construct(array $config = []) { //... } protected function _init() { } }
35. $foo = new Foo(['classes' => [ 'cache' => 'app\extensions\storage\cache' ]]);
37. Auth Cache Catalog Connections Logger Session Adaptable
38. Auth::config(['user' => [ 'adapter' => 'Form', 'model' => 'Users', ]);
39. Connections::config([ 'legacy' => array( 'type' => 'database', 'adapter' => 'MySQL' ), 'new' => array( 'type' => 'database', 'adapter' => 'MongoDb' ), 'funcky' => array( 'type' => 'Http', 'adapter' => 'CouchDb' ) ]);
40. Cache::config(array( 'local' => array( 'adapter' => 'Apc', ), 'distributed' => array( 'adapter' => 'Memcached', 'servers' => ['127.0.0.1'] ), 'default' => array( 'adapter' => 'File', ) ));
41. Aspect Oriented Design
42. Posts::all() Logging Caching
43. Posts::all() Logging Caching
44. use lithium\analysis\Logger; Posts::applyFilter('find', function($self, $params, $chain) { Logger::write('info', 'A log message'); return $chain->next($self, $params, $chain) }};
45. Lithium tries to suck less
46. http://lithify.me Sucks. But check it out anyway