The following features support the GUI components:ĭata conversion between model objects and componentsĪll this functionality is available using standard Java APIs and XML-based configuration files. A Renderer object generates the markup to render the component and converts the data stored in a model object to types that can be represented in a view.Ī standard RenderKit for generating HTML/4.01 markup. Main components of JavaServer Faces technology are as follows:Ī flexible model for rendering components in different kinds of HTML or different markup languages and technologies. JavaServer Faces technology is a user interface framework for building web applications. The Java EE 6 platform requires Servlet 3.0. In the Java EE 6 platform, new Java Servlet technology features include the Although servlets can respond to any type of request, they areĬommonly used to extend the applications hosted by web servers. The capabilities of servers that host applications accessed by way of a request-response Java Servlet technology lets you define HTTP-specific servlet classes. Interceptors specification, which is part of the EJB 3.1 specification, makes more generallyĪvailable the interceptor facility originally defined as part of the EJB 3.0 specification. The Java EE 6 platform requires Enterprise JavaBeans 3.1 and Interceptors 1.1. Singleton session beans, which provide easy access to shared stateĪ lightweight subset of Enterprise JavaBeans functionality (EJB Lite) that can be provided within Java EE Profiles, such as the Java EE Web Profile. The ability to package local enterprise beans in a WAR file In the Java EE 6 platform, new enterprise bean features include the following: Commonly, these are Java Message Service (JMS) messages. When the client finishes executing, the session bean and its data are gone.Ī message-driven bean combines features of a session bean and a message listener, allowing a business component to receive messages asynchronously. You can think of an enterpriseīean as a building block that can be used alone or with otherĮnterprise beans to execute business logic on the Java EE server.Įnterprise beans are either session beans or message-driven beans.Ī session bean represents a transient conversation with a client. Methods to implement modules of business logic.
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Enterprise JavaBeans TechnologyĪn Enterprise JavaBeans (EJB) component, or enterprise bean, is a body of code having fields and Java EE platform and the APIs used in Java EE applications. The following sections give a brief summary of the technologies required by the Figure 1-7 shows the relationships among the Java EE containers.įigure 1-8 shows the availability of the Java EE 6 APIs in the webįigure 1-8 Java EE APIs in the Web Containerįigure 1-9 shows the availability of the Java EE 6 APIs in the EJBįigure 1-9 Java EE APIs in the EJB Containerįigure 1-10 shows the availability of the Java EE 6 APIs in the applicationįigure 1-10 Java EE APIs in the Application Client Container
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