ZFConf 2010: Zend Framework & MVC, Model Implementation (Part 2, Dependency Injection)

Dependency Injection (Внедрение Зависимостей) ZF, Zend_Application, DI Container, Symfony DI 27 марта 2010 г. Санкт-Петербург

Кирилл Чебунин Ведущий PHP разработчик Equelli, ltd. Около 4 лет опыта PHP Более 2х лет использования ZendFramework О Докладчике

Выбор классов Адаптеры Плагины/Хелперы Интерфейсы и Реализация

$GLOBALS $logger = new Zend_Log(); $writer = new Zend_Log_Writer_Stream( '/var/log/myapp.log' ); $logger ->addWriter( $writer ); $GLOBALS [ 'log' ] = $logger ; class UserController extends Zend_Controller_Action { public function indexAction() { /* @var $log Zend_Log */ $log = $GLOBALS [ 'log' ]; $log ->log( 'Index Action' , Zend_Log::INFO); } public function secondAction() { /* @var $log Zend_Log */ $log = $GLOBALS [ 'log' ]; $log ->log( 'Second Action' , Zend_Log::INFO); } }

Zend_Registry $logger = new Zend_Log(); $writer = new Zend_Log_Writer_Stream( '/var/log/myapp.log' ); $logger ->addWriter( $writer ); Zend_Registry::set( 'log' , $logger ); class UserController extends Zend_Controller_Action { public function indexAction() { /* @var $log Zend_Log */ $log = Zend_Registry::get( 'log' ); $log ->log( 'Index Action' , Zend_Log::INFO); } public function secondAction() { /* @var $log Zend_Log */ $log = Zend_Registry::get( 'log' ); $log ->log( 'Second Action' , Zend_Log::INFO); } }

Zend_Application [production] resources.log.file.writerName = "Stream" resources.log.file.writerParams.stream = "/var/log/myapp.log" class UserController extends Zend_Controller_Action { public function indexAction() { /* @var $log Zend_Log */ $log = $this ->getInvokeArg( 'bootstrap' )->getResource( 'log' ); $log ->log( 'Index Action' , Zend_Log::INFO); } public function secondAction() { /* @var $log Zend_Log */ $log = $this ->getInvokeArg( 'bootstrap' )->getResource( 'log' ); $log ->log( 'Second Action' , Zend_Log::INFO); } }

Zend_Application & Dependency Injection class My_Application_Resource_Service_UserService extends Zend_Application_Resource_ResourceAbstract { //[.....] } class My_Application_Resource_Service_PostService extends Zend_Application_Resource_ResourceAbstract { //[.....] } class My_Application_Resource_Service_ArticleService extends Zend_Application_Resource_ResourceAbstract { //[.....] } class My_Application_Resource_Service_RoleService extends Zend_Application_Resource_ResourceAbstract { //[.....] } //[.....] //[.....] //[.....]

Zend_Application & Dependency Injection class Zend_Application_Resource_Log extends Zend_Application_Resource_ResourceAbstract { //[.....] /** * Defined by Zend_Application_Resource_Resource * * @return Zend_Log */ public function init() { return $this ->getLog(); } //[.....] public function getLog() { if (null === $this ->_log) { $options = $this ->getOptions(); $log = Zend_Log::factory( $options ); $this ->setLog( $log ); } return $this ->_log; } }

Конфигурация вместо кода < service id = "log" class = "Zend_Log" constructor = "factory" > < argument type = "collection" > < argument key = "file" type = "collection" > < argument key = "writerName" > Stream </ argument > < argument key = "writerParams" type = "collection" > < argument key = "stream" > /var/log/myapp.log </ argument > </ argument > </ argument > </ argument > </ service > < service id = "log" class = "Zend_Log" > < call method = "addWriter" > < argument type = "service" > < service class = "Zend_Log_Writer_Stream" > < argument > /var/log/myapp.log </ argument > </ service > </ argument > </ call > </ service >

Dependency Injection — A specific form of Inversion of Control (IOC) Взято из ®Wikipedia, the free encyclopedia Внедрение зависимости — Специфическая форма «обращения контроля»

PHP DI Containers Symfony Dependency Injection Yadif_Container Seasar DI Container (S2Container) Phemto Xyster_Container TYPO3 ...........

Symfony DI Container Поддержка XML, YAML, PHP и INI конфигураций Ленивая загрузка Constructor and Method Injection Shared/NotShared ресурсы Конфигураторы Алиасы

Замена контейнера require_once 'Zend/Application.php' ; require_once 'sfServiceContainerBuilder.php' ; require_once 'sfServiceContainerLoaderFileXml.php' ; //Create Container and load configuration from file $container = new sfServiceContainerBuilder(); $loader = new sfServiceContainerLoaderFileXml($container); $loader ->load(APPLICATION_PATH . '/configs/dependencies.xml' ); // Create application, bootstrap, and run $application = new Zend_Application( APPLICATION_ENV, APPLICATION_PATH . '/configs/application.ini' ); $application ->getBootstrap()->setContainer( $container ); $application ->bootstrap() ->run();

Dependencies.xml <? xml version = "1.0" encoding = "UTF-8" ?> < container xmlns = "http://symfony-project.org/2.0/container" > < services > < service id = "userMapper" class = "UserMapperImpl" /> < service id = "PostMapper" class = "PostMapperImpl" /> < service id = "CommentMapper" class = "CommentMapperImpl" /> < service id = "postService" class = "PostServiceImpl" > < call method = "setUserMapper" > < argument type = "service" id = "userMapper" /> </ call > < call method = "setPostMapper" > < argument type = "service" id = "postMapper" /> </ call > < call method = "setCommentMapper" > < argument type = "service" id = "commentMapper" /> </ call > </ service > < service id = "userService" class = "UserServiceImpl" > < call method = "setUserMapper" > < argument type = "service" id = "userMapper" /> </ call > </ service > </ services > </ container >

//[..................] /** * Inject properties on Pre-Dispatch */ public function preDispatch() { $actionController = $this ->getActionController(); $class = new Zend_Reflection_Class( $actionController ); $properties = $class ->getProperties(); /* @var $property Zend_Reflection_Property */ foreach ( $properties as $property ) { if ( $property ->getDocComment()->hasTag( 'Inject' )) { $injectTag = $property ->getDocComment()->getTag( 'Inject' ); $serviceName = $injectTag ->getDescription(); if ( empty ( $serviceName )) { $serviceName = $this ->_formatServiceName( $property ->getName()); } if ( isset ( $this ->_сontainer-> $serviceName )) { $this ->_injectProperty( $property , $this ->_container-> $serviceName ); } } } }

Инъекция через аннотации class UserController extends Zend_Controller_Action { /** * Logger * @var Zend_Log * @Inject */ private $_log ; public function setLog( $log ) { $this ->_log = $log ; } public function indexAction() { $this ->_log->log( 'Index Action' , Zend_Log::INFO); } public function secondAction() { $this ->_log->log( 'Second Action' , Zend_Log::INFO); } }

Проблемы, советы, размышления Транзакции, сквозная функциональность

Транзакции Транзакции недоступны в сервисном слое в нашей реализации Транзакции это уровень сервисов. Может быть несколько источников данных.

Общий интерфейс транзакций interface TransactionManager { /** * Start a new transaction * @return unknown_type */ public function beginTransaction(); /** * Commit the current transaction * @return unknown_type */ public function commit(); /** * Rollback the current transcation * @return unknown_type */ public function rollback(); }

Использование нескольких менеджеров транзакций class MultipleTransactionManager implements TransactionManager { private $tms = array (); public function setTransactionManagers( array $tms ) { $this ->tms = $tms ; return $this ; } public function beginTransaction() { /* @var $tm TransactionManager */ foreach ( $this ->tms as $tm ) { $tm ->beginTransaction(); } } //[.....] }

Сквозная функциональность

Аспектно-ориентированное программирование (АОП)

Динамические прокси class SomeClass { public function someMethod() {} } class __GeneratedDynamicProxy__ extends SomeClass { private $proxyManager ; public function someMethod() { return $this ->proxyManager->invoke( new ReflectionMethod( get_parent_class( $this ), __FUNCTION__ )); } }

Добавим Аннотаций public function someMethod() { $this ->log(__METHOD__ . ' start' ); if ( $this ->user->role != 'ROLE_ADMIN' ) { throw new SecuredException( $this ->user->role); } $tm = $this ->tm; $tm ->beginTransaction(); try { doBusiness(); $tm- >commit(); } catch (Exception $e ) { $tm ->rollback(); throw $e ; } $this ->log(__METHOD__ . ' end' ); } /** * Some business method * @Transactional * @Log * @Secured ROLE_ADMIN */ public function someMethod() { doBusiness(); }

Хорошая архитектура — Простота конфигурации < service id = "actionHelperStack" class = "Zend_Controller_Action_HelperBroker" constructor = "getStack" > < call method = "push" > < argument type = "service" > < service class = "Zend_Controller_Action_Helper_ViewRenderer" > < argument type = "service" id = "view" /> </ service > </ argument > </ call > < call method = "push" > < argument type = "service" > < service class = "My_Controller_Action_Helper_DI" /> </ argument > </ call > </ service >

ZFConf 2010: Zend Framework & MVC, Model Implementation (Part 2, Dependency Injection)

More Related Content

ZFConf 2010: Zend Framework & MVC, Model Implementation (Part 2, Dependency Injection)

Editor's Notes