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Zend Framework 2 quick start

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Zend Framework 2 quick start

  1. 1. Zend Framework 2 quick start by Enrico Zimuel (enrico@zend.com) Senior Software Engineer Zend Framework Core Team Zend Technologies Ltd ZFConf – 21th April 2012 Moscow © All rights reserved. Zend Technologies, Inc.
  2. 2. About me • Enrico Zimuel (@ezimuel) • Software Engineer since 1996 – Assembly x86, C/C++, Java, Perl, PHP • Enjoying PHP since 1999 • PHP Engineer at Zend since 2008 • Zend Framework Core Team from 2011 • B.Sc. Computer Science and Economics from University of Pescara (Italy) © All rights reserved. Zend Technologies, Inc.
  3. 3. Summary ● Overview of ZF2 ● The new autoloading system ● Dependency Injection ● Event manager ● The new MVC ● Quick start: ZendSkeletonApplication ● Package system ● From ZF1 to ZF2 © All rights reserved. Zend Technologies, Inc.
  4. 4. ZF2 key features ● New architecture (MVC, Di, Events) ● Requirement: PHP 5.3 ● No more CLA (Contributor License Agreement) ● Git (GitHub) instead of SVN ● Better performance ● Module management ● Packaging system © All rights reserved. Zend Technologies, Inc.
  5. 5. A new core ● The ZF1 way: ▶ Singleton, Registry, and Hard-Coded Dependencies ● The ZF2 approach: ▶ Aspect Oriented Design and Dependency Injection © All rights reserved. Zend Technologies, Inc.
  6. 6. New architectural approach ● Methodologies used in the development – Decoupling (ZendDi) – Event driven (ZendEventManager) – Standard classes (ZendStdlib) ● Take advantage of PHP 5.3 ▶ Namespace ▶ Lambda Functions and Closures ▶ Better performance © All rights reserved. Zend Technologies, Inc.
  7. 7. Autoloading © All rights reserved. Zend Technologies, Inc.
  8. 8. Autoloading ● No more require_once calls! ● Multiple approaches: – ZF1-style include_path autoloader – Per-namespace/prefix autoloading – Class-map autoloading © All rights reserved. Zend Technologies, Inc.
  9. 9. Classmap generator ● How to generate the .classmap.php? We provided a command line tool: bin/classmap_generator.php ● Usage is trivial: $ cd your/library $ php /path/to/classmap_generator.php -w ● Class-Map will be created in .classmap.php © All rights reserved. Zend Technologies, Inc.
  10. 10. Performance improvement ● Class-Maps show a 25% improvement on the ZF1 autoloader when no acceleration is present ▶ 60-85% improvements when an opcode cache is in place! ● Pairing namespaces/prefixes with specific paths shows >10% gains with no acceleration ▶ 40% improvements when an opcode cache is in place! Note: The new autoloading system of ZF2 has been ported to ZF 1.12 © All rights reserved. Zend Technologies, Inc.
  11. 11. Dependency Injection © All rights reserved. Zend Technologies, Inc.
  12. 12. Dependency injection ● How to manage dependencies between objects? ● Dependency injection (Di) is a design pattern whose purpose is to reduce the coupling between software components It's time for your dependency injection! © All rights reserved. Zend Technologies, Inc.
  13. 13. Di by construct Without Di With Di (construct) class Foo { class Foo { protected $bar; protected $bar; … … public function __construct() { public function $this->bar= new Bar(); __construct(Bar $bar) { } $this->bar = $bar; … } } … } Cons: Pros: Difficult to test Easy to test No isolation Decoupling Difficult to reuse code Flexible architecture © All rights reserved. Zend Technologies, Inc.
  14. 14. Di by setter class Foo { protected $bar; … public function setBar(Bar $bar) { $this->bar = $bar; } … } © All rights reserved. Zend Technologies, Inc.
  15. 15. ZendDi ● Supports the 3 different injection patterns: – Constructor – Interface – Setter ● Implements a Di Container: – Manage the dependencies using configuration and annotation – Provide a compiler to autodiscover classes in a path and create the class definitions, for dependencies © All rights reserved. Zend Technologies, Inc.
  16. 16. Sample definition $definition = array( 'Foo' => array( 'setBar' => array( 'bar' => array( 'type' => 'Bar', 'required' => true, ), ), ), ); © All rights reserved. Zend Technologies, Inc.
  17. 17. Using the Di container use ZendDiDi, ZendDiConfiguration; $di = new Di; $config = new Configuration(array( 'definition' => array('class' => $definition) )); $config->configure($di); $foo = $di->get('Foo'); // contains Bar! © All rights reserved. Zend Technologies, Inc.
  18. 18. Di by annotation namespace Example { use ZendDiDefinitionAnnotation as Di; class Foo { public $bam; /** * @DiInject() */ public function setBar(Bar $bar){ $this->bar = $bar; } } class Bar { } } © All rights reserved. Zend Technologies, Inc.
  19. 19. Di by annotation (2) $compiler = new ZendDiDefinitionCompilerDefinition(); $compiler->addDirectory('File path of Foo and Bar'); $compiler->compile(); $definitions = new ZendDiDefinitionList($compiler); $di = new ZendDiDi($definitions); $baz = $di->get('ExampleFoo'); // contains Bar! More use cases of ZendDi: https://github.com/ralphschindler/zf2-di-use-cases © All rights reserved. Zend Technologies, Inc.
  20. 20. Event Manager © All rights reserved. Zend Technologies, Inc.
  21. 21. Event Manager ● An Event Manager is an object that aggregates listeners for one or more named events, and which triggers events. ● A Listener is a callback that can react to an event. ● An Event is an action. © All rights reserved. Zend Technologies, Inc.
  22. 22. Example use ZendEventManagerEventManager; $events = new EventManager(); $events->attach('do', function($e) { $event = $e->getName(); $params = $e->getParams(); printf( 'Handled event “%s”, with parameters %s', $event, json_encode($params) ); }); $params = array('foo' => 'bar', 'baz' => 'bat'); $events->trigger('do', null, $params); © All rights reserved. Zend Technologies, Inc.
  23. 23. MVC © All rights reserved. Zend Technologies, Inc.
  24. 24. Event driven architecture ● Flow: bootstrap, route, dispatch, response ● Everything is an event in MVC of ZF2 © All rights reserved. Zend Technologies, Inc.
  25. 25. Modules ● The basic unit in a ZF2 MVC application is a Module ● A module is a collection of code and other files that solves a more specific atomic problem of the larger business problem ● Modules are simply: ▶ A namespace ▶ Containing a single classfile, Module.php © All rights reserved. Zend Technologies, Inc.
  26. 26. Quick start ZendSkeletonApplication © All rights reserved. Zend Technologies, Inc.
  27. 27. ZendSkeletonApplication ● A simple, skeleton application using the ZF2 MVC layer and module systems ● On GitHub: ▶ git clone --recursive git://github.com/zendframework/ZendSkeletonApplication.git ● This project makes use of Git submodules ● Works using ZF2.0.0beta3 © All rights reserved. Zend Technologies, Inc.
  28. 28. Folder tree config autoload application.config.php data module Application config vendor src public Application css Controller IndexController.php images view js Module.php .htaccess autoload_classmap.php index.php autoload_function.php autoload_register.php © All rights reserved. Zend Technologies, Inc.
  29. 29. Output © All rights reserved. Zend Technologies, Inc.
  30. 30. index.php chdir(dirname(__DIR__)); require_once (getenv('ZF2_PATH') ?: 'vendor/ZendFramework/library') . '/Zend/Loader/AutoloaderFactory.php'; ZendLoaderAutoloaderFactory::factory(); $appConfig = include 'config/application.config.php'; $listenerOptions = new ZendModuleListenerListenerOptions( $appConfig['module_listener_options']); $defaultListeners = new ZendModuleListenerDefaultListenerAggregate($listenerOptions); $defaultListeners->getConfigListener() ->addConfigGlobPath("config/autoload/{,*.} {global,local}.config.php"); ... © All rights reserved. Zend Technologies, Inc.
  31. 31. index.php (2) ... $moduleManager = new ZendModuleManager($appConfig['modules']); $moduleManager->events()->attachAggregate($defaultListeners); $moduleManager->loadModules(); // Create application, bootstrap, and run $bootstrap = new ZendMvcBootstrap( $defaultListeners->getConfigListener()->getMergedConfig()); $application = new ZendMvcApplication; $bootstrap->bootstrap($application); $application->run()->send(); © All rights reserved. Zend Technologies, Inc.
  32. 32. config/application.config.php return array( 'modules' => array( 'Application' ), 'module_listener_options' => array( 'config_cache_enabled' => false, 'cache_dir' => 'data/cache', 'module_paths' => array( './module', './vendor', ), ), ); © All rights reserved. Zend Technologies, Inc.
  33. 33. config/autoload ● global.config.php ● local.config.php.dist (.gitignore) ● By default, this application is configured to load all configs in: ./config/autoload/{,*.}{global,local}.config.php. ● Doing this provides a location for a developer to drop in configuration override files provided by modules, as well as cleanly provide individual, application-wide config files for things like database connections, etc. © All rights reserved. Zend Technologies, Inc.
  34. 34. Application/config/module.config.php return array( 'di' => array( 'instance' => array( … ) ) ); Here you configure the components of your application (i.e. routing, controller, view) © All rights reserved. Zend Technologies, Inc.
  35. 35. IndexController.php namespace ApplicationController; use ZendMvcControllerActionController, ZendViewModelViewModel; class IndexController extends ActionController { public function indexAction() { return new ViewModel(); } } © All rights reserved. Zend Technologies, Inc.
  36. 36. Modules are “plug and play” ● Easy to reuse a module, only 3 steps: 1) Copy the module in module (or vendor) folder 2) Enable the module in your application.config.php ▶ Add the name of the module in “modules” 3) Copy the config file of the module in /config/autoload/module.<module's name>.config.php © All rights reserved. Zend Technologies, Inc.
  37. 37. modules.zendframework.com © All rights reserved. Zend Technologies, Inc.
  38. 38. Package system © All rights reserved. Zend Technologies, Inc.
  39. 39. Package system ● We use Pyrus, a tool to manage PEAR packages. Pyrus simplifies and improves the PEAR experience. ● Source packages (download + github): ▶ http://packages.zendframework.com/ ● Install and configure pyrus: ▶ wget http://packages.zendframework.com/pyrus.phar ▶ pyrus.phar . ▶ pyrus.phar . channel-discover packages.zendframework.com ● Install a Zend_<component>: ▶ pyrus.phar . install zf2/Zend_<component> © All rights reserved. Zend Technologies, Inc.
  40. 40. From ZF1 to ZF2 © All rights reserved. Zend Technologies, Inc.
  41. 41. Migrate to ZF2 ● Goal: migrate without rewriting much code! ● Main steps – Namespace: Zend_Foo => ZendFoo – Exceptions: an Interface for each components, no more Zend_Exception – Autoloading: 3 possible options (one is ZF1) ▶ MVC: module, event based, dispatchable © All rights reserved. Zend Technologies, Inc.
  42. 42. ZF1 migration prototype ● Source code: http://bit.ly/pvc0X1 ● Creates a "Zf1Compat" version of the ZF1 dispatcher as an event listener. ● The bootstrap largely mimics how ZF1's Zend_Application bootstrap works. ● The default route utilizes the new ZF2 MVC routing, but mimics what ZF1 provided. © All rights reserved. Zend Technologies, Inc.
  43. 43. Helping out ● http://framework.zend.com/zf2 ● http://github.com/zendframework ● https://github.com/zendframework/ZendSkeletonApplication ● Getting Started with Zend Framework 2 by Rob Allen, http://www.akrabat.com ● Weekly IRC meetings (#zf2-meeting on Freenode) ● #zftalk.2 on Freenode IRC © All rights reserved. Zend Technologies, Inc.
  44. 44. Questions? © All rights reserved. Zend Technologies, Inc.
  45. 45. Thank you! ● Comments and feedbacks: – Email: enrico@zend.com – Twitter: @ezimuel © All rights reserved. Zend Technologies, Inc.

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