Re: [weld-dev] ApplicationScoped event fires on service invocation

We have a user scenario where we wishes to replace @Singleton @Startup EJB beans with CDI beans. This was attempted by observing the ApplicationScoped initialization event to trigger the replacement code. However, the event was fired only after the service invocation, which was too late. Apparently OWB fires this event much earlier. The CDI spec states: The /application context /is provided by a built-in context object for the built-in scope type @ApplicationScoped. The application scope is active: • during the service() method of any servlet in the web application, during the doFilter() method of any servlet filter and when the container calls any ServletContextListener, HttpSessionListener, AsyncListener or ServletRequestListener, • during any Java EE web service invocation, • during any remote method invocation of any EJB, during any asynchronous method invocation of any EJB, during any call to an EJB timeout method and during message delivery to any EJB message-driven bean, • when the disposer method or @PreDestroy callback of any bean with any normal scope other than @ApplicationScoped is called, and *• during **@PostConstruct **callback of any bean.* The application context is shared between all servlet requests, web service invocations, EJB remote method invocations, EJB asynchronous method invocations, EJB timeouts and message deliveries to message-driven beans that execute within the same application. The application context is destroyed when the application is shut down. An event with qualifier @Initialized(ApplicationScoped.class) is fired when the application context is initialized and an event with qualifier @Destroyed(ApplicationScoped.class) is fired when the application is destroyed. The event payload is: • the ServletContext if the application is a web application deployed to a Servlet container, or • any java.lang.Object for other types of application. How do you interpret "initialized"? Does it mean the event is fired only after the context is *active?* Is it possible to make the event firing a bit earlier, say around AfterDeploymentValidation? Below is the app to demonstrate the timing along with the server.xml: And here is the results of running it [AUDIT ] CWWKE0001I: The server defaultServer has been launched. [AUDIT ] CWWKE0100I: This product is licensed for development, and limited production use. The full license terms can be viewed here: https://public.dhe.ibm.com/ibmdl/export/pub/software/websphere/wasdev/lic... [AUDIT ] CWWKZ0058I: Monitoring dropins for applications. *---> ApplicationScopedExtension, AfterDeploymentValidation event received, before looking up and touching @ApplicationScoped dummy bean* *---> ApplicationScopedDummyBean, @PostConstruct init method called* *---> ApplicationScopedExtension, after looking up and touching @ApplicationScoped dummy bean* [AUDIT ] CWWKT0016I: Web application available (default_host): http://localhost:9080/70383.180.846.test-application/ *---> ApplicationScopedObserverBean, observed @Initialized(ApplicationScoped.class) event.* [AUDIT ] CWWKZ0001I: Application 70383.180.846.test-application started in 1.165 seconds. [AUDIT ] CWWKF0012I: The server installed the following features: [jsp-2.3, ejbLite-3.2, managedBeans-1.0, jsf-2.2, beanValidation-1.1, servlet-3.1, ssl-1.0, jndi-1.0, jsonp-1.0, appSecurity-2.0, jdbc-4.1, jaxrs-2.0, jaxrsClient-2.0, el-3.0, json-1.0, cdi-1.2, distributedMap-1.0, webProfile-7.0, websocket-1.1, jpa-2.1]. [AUDIT ] CWWKF0011I: The server defaultServer is ready to run a smarter planet. As you can see, the *ApplicationScopedDummyBean, @PostConstruct init method called*proves that the applicationContext was active before the event was fired. Why is this applicationscoped initialization event not fired earlier? Regards Benjamin Unless stated otherwise above: IBM United Kingdom Limited - Registered in England and Wales with number 741598. Registered office: PO Box 41, North Harbour, Portsmouth, Hampshire PO6 3AU Unless stated otherwise above: IBM United Kingdom Limited - Registered in England and Wales with number 741598. Registered office: PO Box 41, North Harbour, Portsmouth, Hampshire PO6 3AU _______________________________________________ weld-dev mailing list weld-dev(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/weld-dev