class ) public class BookShop extends Business implements Shop For instance, the bean types of this bean have been restricted to With the annotation and listing the classes that should be bean Interface unless you define a resource, which we’ll meet inĬhapter 14, Java EE component environment resources.īean types may be restricted to an explicit set by annotating the bean EJB remote interfaces are not considered bean The bean types of a session bean include local interfaces and the beanĬlass local view (if any). Messages, and the bean implementations define the lifecycle of their own With managing the lifecycle of the bean it’s using, nor does it even One great advantage of the contextual model is that it allows statefulīeans to be treated like services! The client need not concern itself May see a different instance (depending on the relationship between the Session scoped) or even all other threads (if it is application scoped).Ĭlients (for example, other beans) executing in the same context will May be shared with certain other threads (for example, if the bean is Unique to the thread (for example, if the bean is request scoped), or it Which clients share a reference to a particular instance of the bean.įor a given thread in a CDI application, there may be an activeĬontext associated with the scope of the bean. The lifecycle of each instance of the bean and Session beans, the client does not control the lifecycle of the instanceīy explicitly creating and destroying it. However, like a stateless or singleton model, but unlike stateful

The client-visible state depends upon which instance of the bean the Unlike a stateless component model (for example, stateless sessionīeans) or a singleton component model (such as servlets, or singletonīeans), different clients of a bean see the bean in different states. Since beans may be stateful, it matters which bean instance I have.

What does it really mean to be contextual? The lifecycle of a bean is managed by the Dependenciesīetween beans are managed automatically by the container. A bean may access transactional resources. May be called directly from Java code, or it may be invoked via the Producer fieldsĪ bean is usually an application class that contains business logic. Bean types, qualifiers and dependency injection 2.1.2.

The binding isaac bean