@Inject everywhere

Présentation de CDI et de ses extensions au BreizhJUG le 1er février 2012

Transcript

1. @Inject everywhere Mais où exactement ?
2. Mathieu ANCELIN • Ingénieur d’étude @SERLI • Java & OSS • JOnAS, GlassFish, Weld, etc ... • Poitou-Charentes JUG • Membre de l’expert group CDI 1.1 (JSR-346) • @TrevorReznik
3. Evènements CDI • Modèle d’évènement intégré basé sur le pattern Observer • Un ‘producteur’ d’évènements • Un ou plusieurs consommateurs • Sélection des cibles grâce aux types d’évènements et aux qualifiers •Système synchrone !!!
4. Evènements CDI @Inject Event<String> evt; @Inject Event<Message> evtMess; evt.fire("Hello World"); evtMess.fire(new Message("Hello")); public void listenAllStrings(@Observes String evt) { } public void listenAllMessages(@Observes Message message) { }
5. Evènements CDI @Inject @Old Event<String> evt; evt.fire("Hello Old Man"); public void listenAllString(@Observes String evt) { }
6. Evènements CDI @Inject @Old Event<String> evt; evt.fire("Hello Old Man"); public void listenOldString(@Observes @Old String evt) { }
7. Evènements CDI @Inject @Old @For(Person.JOHN_DOE) Event<String> evt; evt.fire("Hello Old John Doe"); public void listenAllString(@Observes String evt) { } public void listenOldString(@Observes @Old String evt) { } public void listenOldStringForJohnDoe(@Observes @Old @For(Person.JOHN_DOE) String evt) { }
8. Evènements CDI
9. Evènements CDI public class Configuration { public boolean loggingEnabled = false; public boolean someOptimizationEnabled = false; public boolean someStuffEnabled = false; }
10. Evènements CDI public class Configuration { public boolean loggingEnabled = false; public boolean someOptimizationEnabled = false; public boolean someStuffEnabled = false; } @Inject Event<Configuration> configEvt; public void customConfiguration() { Configuration config = new Configuration(); configEvent.fire(configuration); }
11. Evènements CDI public class Configuration { public boolean loggingEnabled = false; public boolean someOptimizationEnabled = false; public boolean someStuffEnabled = false; } public void configure(@Observes Configuration configuration) { configuration.loggingEnabled = true; configuration.someStuffEnabled = true; } @Inject Event<Configuration> configEvt; public void customConfiguration() { Configuration config = new Configuration(); configEvent.fire(configuration); }
12. Evènements CDI if (config.loggingEnabled) { /** Do stuff **/ } if (config.someOptimizationEnabled) { /** Do stuff **/ } if (config.someStuffEnabled) { /** Do stuff **/ } public class Configuration { public boolean loggingEnabled = false; public boolean someOptimizationEnabled = false; public boolean someStuffEnabled = false; } public void configure(@Observes Configuration configuration) { configuration.loggingEnabled = true; configuration.someStuffEnabled = true; } @Inject Event<Configuration> configEvt; public void customConfiguration() { Configuration config = new Configuration(); configEvent.fire(configuration); }
13. Extensions CDI • Première spécification à fournir un moyen permettant d’étendre Java EE de façon standard • API d’extension permettant de : • Ajouter/Supprimer des beans • Ajouter un scope • Modifier les méta-données d’un bean • Remplir des points d’injection • etc ...
14. • Basé sur le pattern Service Provider Interface • Implémenter l’interface (vide) Extension • Observer les évènements provenant du conteneur pour modifier le déploiement • Enregistrer l’extension • Ajouter un fichier META-INF/services/ javax.enterprise.inject.spi.Extension contenant le nom complet de la classe d’extension Comment ça marche ?
15. Evènements observables • BeforeBeanDiscovery • ProcessAnnotatedType • ProcessInjectionTarget • ProcessBean • ProcessObserverMethod • ProcessProducer • AfterBeanDiscovery • AfterDeploymentValidation • BeforeShutDown
16. Types d’extensions • Extension purement orientée outillage • Extension d’intégration • Extension Runtime
17. Types d’extensions • Extension purement orientée outillage • cdi-aop • Extension d’intégration • Extension Runtime
18. Types d’extensions • Extension purement orientée outillage • cdi-aop • Extension d’intégration • cdi-actors • Extension Runtime • play-cdi public class AOPConfig { public void configure(@Observes AOPConfigEvent config) { config.add( intercept(Service.class) .onAllMethodsReturning(String.class) ); } } public void intercept(@Observes @Return(String.class) @MethodName("doSomething") @MethodAnnotated(CutHere.class) Before before) { if (getHourOfTheDay() == 0) { before.preventAndReturn( "Impossible d'utiliser cette méthode maintenant"); } else { logger.info("Méthode " + before.getMethod() + " accédée par " + before.getParameter(0)); } }
19. Types d’extensions • Extension purement orientée outillage • cdi-aop • Extension d’intégration • cdi-actors • Extension Runtime
20. Types d’extensions @Inject @To(actor=Master.class) ActorEvent<Calculate> master; master.fire(new Calculate(4, 10000, 10000)); @ActorConfig("master") @ApplicationScoped public static class Master extends CDIActor { public void listenCalculate(@Observes Calculate message) { ... } }
21. Types d’extensions • Extension purement orientée outillage • cdi-aop • Extension d’intégration • cdi-actors • Extension Runtime • play-cdi
22. Types d’extensions public class Application extends Controller { @Inject static MyBean myBean; public static void index() { myBean.currentUserId = session.get("id"); DataFromSomewhere data = myBean.getData(); render(data); } } @RequestScoped public class MyBean { @Inject @FromWS DataClient; public String currentUserId; public DataFromSomewhere getData() { ... } }
23. Implémentations
24. JBoss Weld • Implémentation de référence de CDI 1 et CDI 1.1 (construit en parallèle de la spec.) • Projet plutôt mature • Utilisé dans plusieurs serveurs d’applications • Bonne communauté, réactive • Gros travail d’évangélisation JBoss
25. OpenWebBeans • Implémentation open-source Apache • Utilisé dans Géronimo et TomEE • Projet semble mature • mais utilisation ? • Contributeurs très impliqués dans CDI
26. CanDI • Implémentation Caucho • Utilisée dans Resin • En tant qu’implémentation CDI pour les utilisateurs • En interne dans le serveur d’application
27. Extensions
28. JBoss Seam
29. JBoss Seam • Solder • Cron Module • Faces Module • Errai CDI • International Module • JMS Module • Mail Module • Persistence Module • Remoting Module • Reports Module • REST Module • Security Module • Social Module • Spring Module • Validation Module • Wicket Module
30. Seam == Trop orienté JBoss
31. Apache DeltaSpike • Extensions portables CDI • Projet permettant d’unifier les efforts autour des extensions CDI • JBoss Seam 3 • MyFaces CODI • CDISource • Créer un standard de-facto maintenu par la communauté Java • Environnement de test basé sur Arquillian
32. CDI == Java EE ???
33. Java SE • Bootstrapper un conteneur CDI dans un environnement Java SE • Problématiques • Déploiement des beans • Lookup des beans • Solutions propriétaires • Weld-SE, OWB - CanDI ?
34. Java SE public class NumberGuessFrame extends javax.swing.JFrame { @Inject Game game; @Inject MessageGenerator msgGenerator; public void start(@Observes ContainerInitialized event) { java.awt.EventQueue.invokeLater(new Runnable() { public void run() { initComponents(); setVisible(true); } }); } } main-class: org.jboss.weld.environment.se.StartMain
35. Java SE Weld weld = new Weld(); WeldContainer container = weld.initialize(); Instance<Object> instance = container.instance(); instance.select(Mybean.class).get();
36. Servlet • Bootstrapper un conteneur CDI dans un conteneur de Servlets • Possibilités existantes : • Weld-Servlet • Intégration JSF • Seam-Solder • OWB servlet plugin • CanDI ?
37. Servlet • Injection dans les servlets • HttpSession, HttpRequest, HttpResponse • RequestParam, Context, Cookies, Cookie-params, Principal • Ajout de quelques filtres et listeners dans le web.xml si • Pas de configuration si environnement servlet 3.0 • Events bridge • Servlet lifecycle, etc ...
38. OSGi • Projet Weld-OSGi : OSGi sans se prendre la tête • Le meilleur des deux mondes • dynamique, typesafe, annotations, etc ... • Extension CDI pour utiliser le modèle de programmation CDI dans un environnement OSGi • Développé par l’équipe R&D de SERLI • A la demande de l’équipe JBoss Weld • Faire disparaitre le modèle de programmation OSGi au profit du standard CDI (mais compatible) • Pas besoin de connaître OSGi
39. OSGi • Une super plateforme pour créer des applications Java dynamiques et modulaires • Très stable et mature mais les APIs datent un peu Modules Cycle de vie Services Environnement Java Bundles
40. Modules / Bundles manifest manifest Bundle-SymbolicName: com.foo.bar Bundle-SymbolicName: com.sample.app Export-Package: com.sample.app.api; version=1.2.0 Import-Package: com.sample.app.api; version=[1.2.0-2.0.0)
41. Cycle de vie Installed Resolved Uninstalled Starting Active Stopping install update refresh stop start update refresh resolve uninstall uninstall
42. Services OSGI services registry Bundle A Bundle B listener register notify lookup 1 2 3
43. Comment ça marche ?
44. CDI embarqué EmbeddedCDIContainer cdi = new EmbeddedContainer(bundleContext).initialize(); MyService service = cdi.instance().select(MyService.class).get(); service.doSomething(); cdi.stop();
45. CDI embarqué ou EmbeddedCDIContainer cdi = new EmbeddedContainer(bundleContext).initialize(); MyService service = cdi.instance().select(MyService.class).get(); service.doSomething(); cdi.stop();
46. CDI embarqué ou WeldContainer weld = new WeldContainer(bundleContext).initialize(); MyService service = weld.instance().select(MyService.class).get(); service.doSomething(); weld.stop(); EmbeddedCDIContainer cdi = new EmbeddedContainer(bundleContext).initialize(); MyService service = cdi.instance().select(MyService.class).get(); service.doSomething(); cdi.stop();
47. CDI embarqué ou public void start(@Observes BundleContainerInitialized event) {} public void stop(@Observes BundleContainerShutdown event) {} WeldContainer weld = new WeldContainer(bundleContext).initialize(); MyService service = weld.instance().select(MyService.class).get(); service.doSomething(); weld.stop(); EmbeddedCDIContainer cdi = new EmbeddedContainer(bundleContext).initialize(); MyService service = cdi.instance().select(MyService.class).get(); service.doSomething(); cdi.stop();
48. Utilitaires OSGi • Injection du bundle courant • Injection du bundleContext courant • Injection des/d’une méta-données courantes • Injection des fichiers spécifiques au bundle (dans le conteneur) • Autres utilitaires au fur et à mesure
49. Utilitaires OSGi @Inject Bundle bundle; @Inject BundleContext context; @Inject @BundleHeaders Map<String, String> headers; @Inject @BundleHeader("Bundle-SymbolicName") String symbolicName; @Inject @BundleDataFile("text.txt") File text; • Injection du bundle courant • Injection du bundleContext courant • Injection des/d’une méta-données courantes • Injection des fichiers spécifiques au bundle (dans le conteneur) • Autres utilitaires au fur et à mesure
50. Publication de services
51. Publication de services • Publication déclarative @Publish @ApplicationScoped @Lang(EN) public class MyServiceImpl implements MyService { ... }
52. Publication de services • Publication déclarative • Publication dynamique @Publish @ApplicationScoped @Lang(EN) public class MyServiceImpl implements MyService { ... } @Inject Instance<MyService> instance; @Inject ServiceRegistry registry; MyService service = instance.get(); Registration<MyService> reg = registry.register(service); ... reg.unregister();
53. Injection de services • Injection dynamique directe @Inject @OSGiService MyService service; service.doSomething(); // échoue si pas de service disponible
54. Injection de services • Injection dynamique directe @Inject @OSGiService MyService service; service.doSomething(); // échoue si pas de service disponible @Inject @OSGiService MyService service; P R O X Y Provider InjectionPoint create() get()
55. Injection de services service.doSomething() P R O X Y get() OSGi service registry unget() actual service doSomething()
56. Injection de services • Injection programmatique - whiteboard pattern @Inject Service<MyService> service; for (MyService actualService : service.first()) { actualService.doSomething(); // appelé sur 0-1 service } for (MyService actualService : service) { actualService.doSomething(); // appelé sur 0-n service(s) } service.get().doSomething(); // peut échouer, non dynamique service.size(); service.isUnsatisfied(); service.isAmbiguous();
57. Injection de services • Injection programmatique - whiteboard pattern @Inject Service<MyService> service; for (MyService actualService : service.first()) { actualService.doSomething(); // appelé sur 0-1 service } for (MyService actualService : service) { actualService.doSomething(); // appelé sur 0-n service(s) } service.get().doSomething(); // peut échouer, non dynamique service.size(); service.isUnsatisfied(); service.isAmbiguous();
58. Injection de services - filtres @Publish @Lang(EN) @Country(US) public class MyServiceImpl implements MyService { ... }
59. Injection de services - filtres @Publish @Lang(EN) @Country(US) public class MyServiceImpl implements MyService { ... } @Inject @OSGiService @Filter("(&(lang=*)(country=US))") MyService service;
60. Injection de services - filtres @Publish @Lang(EN) @Country(US) public class MyServiceImpl implements MyService { ... } @Inject @Filter("(&(lang=*)(country=US))") Service<MyService> service;
61. Injection de services - filtres @Publish @Lang(EN) @Country(US) public class MyServiceImpl implements MyService { ... } @Inject @Filter("(&(lang=*)(country=US))") Service<MyService> service; @Inject @OSGiService @Lang(EN) @Country(US) MyService service;
62. Injection de services - filtres @Publish @Lang(EN) @Country(US) public class MyServiceImpl implements MyService { ... } @Inject @Filter("(&(lang=*)(country=US))") Service<MyService> service; @Inject @Lang(EN) @Country(US) Service<MyService> service;
63. Services requis • Permet de cibler l’utilisation de services uniquement lorsqu’ils sont disponibles • Fonctionne de façon atomique au niveau du bundle • plus tard, possibilité de cibler des services particuliers
64. Services requis @Inject @OSGiService @Required MyService service; Weld-OSGi service registry public void start( @Observes Valid evt) {} public void stop( OSGi service registry listener services events required service registration dependencies validation events Bean B Bean A
65. Services requis @Inject @OSGiService @Required MyService service; public void start(@Observes Valid evt) { System.out.println("service is available"); service.doSomething(); } public void stop(@Observes Invalid evt) { System.out.println("service is unavailable"); }
66. Services requis @Inject @Required Service<MyService> service; public void start(@Observes Valid evt) { System.out.println("service is available"); service.get().doSomething(); } public void stop(@Observes Invalid evt) { System.out.println("service is unavailable"); }
67. Services requis @Inject @Required Service<MyService> service; public void start(@Observes Valid evt) { System.out.println("service is available"); service.get().doSomething(); } public void stop(@Observes Invalid evt) { System.out.println("service is unavailable"); } bundle complet
68. @Inject @OSGiService @Required MyService service; public void start(@Observes @Specification(MyService.class) ServiceAvailable evt) { System.out.println("service is available"); service.doSomething(); } public void stop(@Observes @Specification(MyService.class) ServiceUnavailable evt) { System.out.println("service is unavailable"); } Services requis
69. @Inject @Required Service<MyService> service; public void start(@Observes @Specification(MyService.class) ServiceAvailable evt) { System.out.println("service is available"); service.get().doSomething(); } public void stop(@Observes @Specification(MyService.class) ServiceUnavailable evt) { System.out.println("service is unavailable"); } Services requis
70. Evènements OSGi • OSGi génère un certains nombre d’évènements pour interagir avec la couche cycle de vie et la couche services • évènements bundles • évènements services
71. Evènements OSGi - bundles • Evènements disponibles • BundleInstalled • BundleResolved • BundleStarting • BundleStarted • BundleStopping • BundleStopped • BundleUninstalled • BundleUpdated • BundleUnresolved Installed Resolved Uninstalled Starting Active Stopping install update refresh stop start update refresh resolve uninstall uninstall
72. Evènements OSGi - bundles public void bindBundle(@Observes BundleInstalled evt) {}
73. Evènements OSGi - bundles public void bindBundle(@Observes @BundleName("com.foo.bar") BundleInstalled evt) {}
74. Evènements OSGi - bundles public void bindBundle(@Observes @BundleVersion("1.2.3") BundleInstalled evt) {}
75. Evènements OSGi - bundles public void bindBundle(@Observes @BundleVersion("1.2.3") @BundleName("com.foo.bar") BundleInstalled evt) {}
76. Evènements OSGi - services • Evènements disponibles • ServiceArrival • ServiceDeparture • ServiceChanged
77. Evènements OSGi - services void bindService(@Observes ServiceArrival evt) {} • Evènements disponibles • ServiceArrival • ServiceDeparture • ServiceChanged
78. Evènements OSGi - services void bindService(@Observes @Filter("(lang=US)") ServiceArrival evt) {} • Evènements disponibles • ServiceArrival • ServiceDeparture • ServiceChanged
79. Evènements OSGi - services void bindService(@Observes @Specification(MyService.class) ServiceArrival evt) {} • Evènements disponibles • ServiceArrival • ServiceDeparture • ServiceChanged
80. Evènements OSGi - services void bindService(@Observes @Specification(MyService.class) @Filter("(lang=US)") ServiceArrival evt) {} • Evènements disponibles • ServiceArrival • ServiceDeparture • ServiceChanged
81. Communication inter-bundles • Communication entre différents bundles (gérés par Weld-OSGi) via le système d’évènements CDI Bundle A Bundle C Bundle B Weld-OSGi fire() broadcast() broadcast()
82. Communication inter-bundles @Inject Event<InterBundleEvent> event; event.fire(new InterBundleEvent("Hello bundles"));
83. Communication inter-bundles @Inject Event<InterBundleEvent> event; event.fire(new InterBundleEvent("Hello bundles")); public void listen(@Observes InterBundleEvent event) { }
84. Communication inter-bundles @Inject Event<InterBundleEvent> event; event.fire(new InterBundleEvent("Hello bundles")); public void listen(@Observes @Sent InterBundleEvent event) { }
85. Communication inter-bundles @Inject Event<InterBundleEvent> event; event.fire(new InterBundleEvent("Hello bundles")); public void listen(@Observes @Specification(String.class) InterBundleEvent event) {}
86. Communication inter-bundles @Inject Event<InterBundleEvent> event; event.fire(new InterBundleEvent("Hello bundles")); public void listen(@Observes @Specification(String.class) @Sent InterBundleEvent event) {}
87. Weld-OSGi
88. GWT • Projet JBoss Errai (Seam) • Invocation des beans CDI depuis des clients GWT • Invocations RPC • Publish/Subscribe • CDI events • Exposer les modèles métier aux clients GWT (@ExposeEntity) • Injection de dépendance côté client • http://www.jboss.org/errai
89. GWT/Errai App. Server (CDI) GWT
90. GWT/Errai App. Server (CDI) GWT
91. GWT/Errai App. Server (CDI) GWT Bus d’évènement (avec topics) Servlet 2.5 Comet (Jetty, Grizzly, JBoss, Tomcat) Servlet 3 (Async)
92. Invocation RPC @Service @ApplicationScoped public class AccountServiceRPC implements AccountService { public Fraud watchActivity( AccountActivity activity) { return new Fraud(System.currentTimeMillis()); } }
93. Invocation RPC @Service @ApplicationScoped public class AccountServiceRPC implements AccountService { public Fraud watchActivity( AccountActivity activity) { return new Fraud(System.currentTimeMillis()); } }
94. Invocation RPC public class FraudClientRPC extends LayoutPanel { @Inject Caller<AccountService> service; HTML responsePanel; ... @PostConstruct public void buildUI() { Button button = new Button("Create activity", new ClickHandler() { public void onClick(ClickEvent clickEvent) { service.call(new RemoteCallback<Fraud>() { public void callback(Fraud fraud) { responsePanel.setText("Fraud detected: " + fraudEvent.getTimestamp()); } }).watchActivity(new AccountActivity()); } }); ... } }
95. Invocation RPC public class FraudClientRPC extends LayoutPanel { @Inject Caller<AccountService> service; HTML responsePanel; ... @PostConstruct public void buildUI() { Button button = new Button("Create activity", new ClickHandler() { public void onClick(ClickEvent clickEvent) { service.call(new RemoteCallback<Fraud>() { public void callback(Fraud fraud) { responsePanel.setText("Fraud detected: " + fraudEvent.getTimestamp()); } }).watchActivity(new AccountActivity()); } }); ... } } @PostConstruct public void buildUI() { Button button = new Button("Create activity", new ClickHandler() { public void onClick(ClickEvent clickEvent) { (new AccountActivity()); } }); ... }
96. Invocation RPC public class FraudClientRPC extends LayoutPanel { @Inject Caller<AccountService> service; HTML responsePanel; ... @PostConstruct public void buildUI() { Button button = new Button("Create activity", new ClickHandler() { public void onClick(ClickEvent clickEvent) { service.call(new RemoteCallback<Fraud>() { public void callback(Fraud fraud) { responsePanel.setText("Fraud detected: " + fraudEvent.getTimestamp()); } }).watchActivity(new AccountActivity()); } }); ... } } @PostConstruct public void buildUI() { Button button = new Button("Create activity", new ClickHandler() { public void onClick(ClickEvent clickEvent) { (new AccountActivity()); } }); ... } service.call(new RemoteCallback<Fraud>() { public void callback(Fraud fraud) { responsePanel.setText("Fraud detected: " + fraudEvent.getTimestamp()); } }).watchActivity(new AccountActivity());
97. Invocation RPC public class FraudClientRPC extends LayoutPanel { @Inject Caller<AccountService> service; HTML responsePanel; ... @PostConstruct public void buildUI() { Button button = new Button("Create activity", new ClickHandler() { public void onClick(ClickEvent clickEvent) { service.call(new RemoteCallback<Fraud>() { public void callback(Fraud fraud) { responsePanel.setText("Fraud detected: " + fraudEvent.getTimestamp()); } }).watchActivity(new AccountActivity()); } }); ... } } @PostConstruct public void buildUI() { Button button = new Button("Create activity", new ClickHandler() { public void onClick(ClickEvent clickEvent) { (new AccountActivity()); } }); ... } service.call(new RemoteCallback<Fraud>() { public void callback(Fraud fraud) { responsePanel.setText("Fraud detected: " + fraudEvent.getTimestamp()); } }).watchActivity(new AccountActivity());
98. Publish/Suscribe @Service @ApplicationScoped public class AccountServicePubSub implements MessageCallback { @Inject RequestDispatcher dispatcher; public void callback(Message activity) { MessageBuilder.createMessage() .toSubject("FraudClientPubSub") .signalling() .with("fraudTimeStamp", System.currentTimeMillis()) .noErrorHandling() .sendNowWith(dispatcher); }); } }
99. Publish/Suscribe @Service @ApplicationScoped public class AccountServicePubSub implements MessageCallback { @Inject RequestDispatcher dispatcher; public void callback(Message activity) { MessageBuilder.createMessage() .toSubject("FraudClientPubSub") .signalling() .with("fraudTimeStamp", System.currentTimeMillis()) .noErrorHandling() .sendNowWith(dispatcher); }); } }
100. Publish/Suscribe public class FraudClientRPC extends LayoutPanel { @Inject MessageBus bus; HTML responsePanel;
101. Publish/Suscribe public class FraudClientRPC extends LayoutPanel { @Inject MessageBus bus; HTML responsePanel; @PostConstruct public void buildUI() { }
102. Publish/Suscribe public class FraudClientRPC extends LayoutPanel { @Inject MessageBus bus; HTML responsePanel; @PostConstruct public void buildUI() { } bus.subscribe("BroadcastReceiver", new MessageCallback() { public void callback(CommandMessage message) { responsePanel.setText("Fraud detected: " + message.get(Long.class, "fraudTimeStamp"); } });
103. Publish/Suscribe public class FraudClientRPC extends LayoutPanel { @Inject MessageBus bus; HTML responsePanel; @PostConstruct public void buildUI() { } bus.subscribe("BroadcastReceiver", new MessageCallback() { public void callback(CommandMessage message) { responsePanel.setText("Fraud detected: " + message.get(Long.class, "fraudTimeStamp"); } }); Button button = new Button("Create activity", new ClickHandler() { public void onClick(ClickEvent clickEvent) { MessageBuilder.createMessage() .toSubject("AccountServicePubSub") .signalling() .noErrorHandling() .sendNowWith(bus); } });
104. Publish/Suscribe public class FraudClientRPC extends LayoutPanel { @Inject MessageBus bus; HTML responsePanel; @PostConstruct public void buildUI() { } bus.subscribe("BroadcastReceiver", new MessageCallback() { public void callback(CommandMessage message) { responsePanel.setText("Fraud detected: " + message.get(Long.class, "fraudTimeStamp"); } }); Button button = new Button("Create activity", new ClickHandler() { public void onClick(ClickEvent clickEvent) { MessageBuilder.createMessage() .toSubject("AccountServicePubSub") .signalling() .noErrorHandling() .sendNowWith(bus); } });
105. CDI Events @ApplicationScoped public class AccountService { @Inject @Detected Event<Fraud> event; public void watchActivity( @Observes AccountActivity activity) { Fraud fraud = new Fraud(System.currentTimeMillis()); event.fire(fraud); } }
106. CDI Events @ApplicationScoped public class AccountService { @Inject @Detected Event<Fraud> event; public void watchActivity( @Observes AccountActivity activity) { Fraud fraud = new Fraud(System.currentTimeMillis()); event.fire(fraud); } }
107. CDI Events public class FraudClient extends LayoutPanel { @Inject Event<AccountActivity> event; HTML responsePanel; ... }
108. CDI Events public class FraudClient extends LayoutPanel { @Inject Event<AccountActivity> event; HTML responsePanel; ... } @PostConstruct public void buildUI() { }
109. CDI Events public class FraudClient extends LayoutPanel { @Inject Event<AccountActivity> event; HTML responsePanel; ... } @PostConstruct public void buildUI() { }
110. CDI Events public class FraudClient extends LayoutPanel { @Inject Event<AccountActivity> event; HTML responsePanel; ... } Button button = new Button("Create activity", new ClickHandler() { public void onClick(ClickEvent clickEvent) { event.fire(new AccountActivity()); } }); @PostConstruct public void buildUI() { }
111. CDI Events public class FraudClient extends LayoutPanel { @Inject Event<AccountActivity> event; HTML responsePanel; ... } Button button = new Button("Create activity", new ClickHandler() { public void onClick(ClickEvent clickEvent) { event.fire(new AccountActivity()); } }); @PostConstruct public void buildUI() { }
112. CDI Events public class FraudClient extends LayoutPanel { @Inject Event<AccountActivity> event; HTML responsePanel; ... } Button button = new Button("Create activity", new ClickHandler() { public void onClick(ClickEvent clickEvent) { event.fire(new AccountActivity()); } }); public void processFraud(@Observes @Detected Fraud fraudEvent) { responsePanel.setText("Fraud detected: " + fraudEvent.getTimestamp()); } @PostConstruct public void buildUI() { }
113. CDI Events public class FraudClient extends LayoutPanel { @Inject Event<AccountActivity> event; HTML responsePanel; ... } Button button = new Button("Create activity", new ClickHandler() { public void onClick(ClickEvent clickEvent) { event.fire(new AccountActivity()); } }); public void processFraud(@Observes @Detected Fraud fraudEvent) { responsePanel.setText("Fraud detected: " + fraudEvent.getTimestamp()); } @PostConstruct public void buildUI() { }
114. GAE • Projet Capedwarf • Créé par Ales Justin (lead Weld) • Faire fonctionner CDI sur GAE • Quelques workaround pour contrer les APIs défendues • Accès aux API GAE via CDI • Utiliser les API GAE sur JBoss AS 7 • Permettre de switcher entre AS7 et GAE de manière transparente
115. Wicket • Module Seam d’intéropérabilité avec Wicket • Fonctionnalités • CDI • Injection de dépendances • Scopes • Evènements CDI • Support des conversations • http://seamframework.org/Seam3/ WicketModule
116. Wicket • L’application Wicket doit hériter de ‘org.jboss.seam.wicket.SeamWicket’ • A partir de ce point, l’application devient «injectable» • Possibilité d’injection une ‘Conversation’ et de la gérer manuellement
117. Spring • Module Seam d’intéropérabilité avec Spring • Fonctionnalités • Bootstrap de context Spring (SE et Web) • Utilisation de beans Spring depuis CDI • Utilisation de beans CDI depuis Spring • Bridge Spring Security • Bridge CDI events • http://seamframework.org/Seam3/SpringModule
118. public class SpringProducer { @Produces @SpringContext @Web ApplicationContext context; @Produces @SpringContext @Configuration(locations = "classpath*:applicationContext.xml") ApplicationContext context; @Produces @SpringBean(fromContext = "context2") SimpleBean simpleBean; @Produces @SpringBean ComplicatedBean complicatedBean; } Spring
119. public class SpringProducer { @Produces @SpringContext @Web ApplicationContext context; @Produces @SpringContext @Configuration(locations = "classpath*:applicationContext.xml") ApplicationContext context; @Produces @SpringBean(fromContext = "context2") SimpleBean simpleBean; @Produces @SpringBean ComplicatedBean complicatedBean; } Spring
120. Spring <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:cdi="http://www.jboss.org/schema/seam/spring" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.jboss.org/schema/seam/spring http://www.jboss.org/schema/seam/spring/seam-spring.xsd"> <cdi:bean-reference id="cdiBean" type="org.jboss.seam.spring.test.injection.CdiBean"/> <cdi:bean-reference id="thirdCdiBean" type="org.jboss.seam.spring.test.injection.ThirdCdiBean"> <cdi:qualifier type="org.jboss.seam.spring.test.injection.CdiQualifierWithAttributes"> <cdi:attribute name="name" value="myBean"/> </cdi:qualifier> </cdi:bean-reference> </beans>
121. Spring <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:cdi="http://www.jboss.org/schema/seam/spring" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.jboss.org/schema/seam/spring http://www.jboss.org/schema/seam/spring/seam-spring.xsd"> <cdi:bean-reference id="cdiBean" type="org.jboss.seam.spring.test.injection.CdiBean"/> <cdi:bean-reference id="thirdCdiBean" type="org.jboss.seam.spring.test.injection.ThirdCdiBean"> <cdi:qualifier type="org.jboss.seam.spring.test.injection.CdiQualifierWithAttributes"> <cdi:attribute name="name" value="myBean"/> </cdi:qualifier> </cdi:bean-reference> </beans>
122. Spring <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:cdi="http://www.jboss.org/schema/seam/spring" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.jboss.org/schema/seam/spring http://www.jboss.org/schema/seam/spring/seam-spring.xsd"> <cdi:bean-reference id="cdiBean" type="org.jboss.seam.spring.test.injection.CdiBean"/> <cdi:bean-reference id="thirdCdiBean" type="org.jboss.seam.spring.test.injection.ThirdCdiBean"> <cdi:qualifier type="org.jboss.seam.spring.test.injection.CdiQualifierWithAttributes"> <cdi:attribute name="name" value="myBean"/> </cdi:qualifier> </cdi:bean-reference> </beans>
123. Ruby • Projet Torquebox • JRuby au dessus de JBoss AS 7 • Support de Rack, Rails, Sinatra, etc ... • Interopérable avec les features Java EE • Transactions, JMS, Cache, Session, Jobs • CDI, Resources injection, Authentication
124. Ruby @ApplicationScoped public class TwitterClient { @Inject Twitter twitter; private List<User> users; private List<Status> statuses; private QueryResult search; public void loadTweets() throws TwitterException { statuses = twitter.getFriendsTimeline(); } public void loadFriends() throws TwitterException { IDs followersIDs = twitter.getFollowersIDs(-1); users = twitter.lookupUsers(followersIDs.getIDs()); } public void loadSearch() throws TwitterException { Query query = new Query("#BreizhJUG"); search = twitter.search(query); } // getters }
125. Ruby class WelcomeController < ActionController::Base protect_from_forgery include TorqueBox::Injectors include_class "com.foo.bar.TwitterClient" def index @rails_msg = "Hello from Rails!" end end
126. Ruby class WelcomeController < ActionController::Base protect_from_forgery include TorqueBox::Injectors include_class "com.foo.bar.TwitterClient" def index @rails_msg = "Hello from Rails!" end end
127. Ruby class WelcomeController < ActionController::Base protect_from_forgery include TorqueBox::Injectors include_class "com.foo.bar.TwitterClient" def index @rails_msg = "Hello from Rails!" end end def followers twitter = inject(com.foo.bar.TwitterClient) @twitter_followers = twitter.get_users end
128. Ruby class WelcomeController < ActionController::Base protect_from_forgery include TorqueBox::Injectors include_class "com.foo.bar.TwitterClient" def index @rails_msg = "Hello from Rails!" end end def search twitter = inject(com.foo.bar.TwitterClient) @twitter_search = twitter.get_search end def followers twitter = inject(com.foo.bar.TwitterClient) @twitter_followers = twitter.get_users end
129. Ruby class WelcomeController < ActionController::Base protect_from_forgery include TorqueBox::Injectors include_class "com.foo.bar.TwitterClient" def index @rails_msg = "Hello from Rails!" end end def search twitter = inject(com.foo.bar.TwitterClient) @twitter_search = twitter.get_search end def followers twitter = inject(com.foo.bar.TwitterClient) @twitter_followers = twitter.get_users end def tweets twitter = inject(com.foo.bar.TwitterClient) @twitter_tweets = twitter.get_statuses end
130. Ruby class WelcomeController < ActionController::Base protect_from_forgery include TorqueBox::Injectors include_class "com.foo.bar.TwitterClient" def index @rails_msg = "Hello from Rails!" end end def search twitter = inject(com.foo.bar.TwitterClient) @twitter_search = twitter.get_search end def followers twitter = inject(com.foo.bar.TwitterClient) @twitter_followers = twitter.get_users end def tweets twitter = inject(com.foo.bar.TwitterClient) @twitter_tweets = twitter.get_statuses end
131. Autre ? • Il est assez simple de supporter un nouvel environnement • Deux «parties» nécessaires • Bootstrap du container et déploiement des classes/beans • Spécifique à l’implémentation • Devrait être standardisé • Extension CDI • Lien avec l’environnement (uni/bi-directionnel)
132. @Inject • Guice (version Android, RoboGuice) • Implémentation de référence JSR-330 • Spring (depuis version 3.0) • Tapestry IoC • PicoContainer • JBoss MicroContainer • Eclipse E4 • ...
133. CDI 1.1 • Tout est sur github :-) • Conteneur embarquable et lookup externe • TODO : boot, bean deployment • Ordre des intercepteurs • ProcessModule, ProcessInjectionPoint • Exclusion déclarative des beans • Service handlers • Lifecycle events • Injection statique et des enums
134. Conclusion • CDI c’est cool ;-) • Pas seulement réservé à Java EE • Peut fonctionner n’importe où • C’est standard (quasiment) • Préférez le à d’autres solutions • Modèle de programmation commun
135. Question ?