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GlassFish and WebSphere are examples of web container plus application container. Classes in this layer are executed in the application container part of JEE Server. The request to this layer could come from the presentation layer, directly from the client application, or from the middle layer consisting of, but not limited to, web services. The business layer is where you typically write code to handle the business logic of your application.

JSF also makes it easier to handle UI events on the server side and specify page navigation in an application.

For example, if you have a page that posts form data from a browser, you can have JSF save that data in a Java Bean so that it can be used subsequently in the response to the same or different request. It also provides easy to use tags for common user interface controls that can save states across multiple request-response exchanges between the client and server. Java Server Faces makes creating user interface on the server side modular by incorporating the MVC design pattern in its implementation. Like Servlets, JSPs are also server side modules used to process the web requests. Therefore, it is not the most convenient option for generating large HTML response. Servlets are useful for handling requests that do not generate large HTML markup responses. Java servlets are server side modules, typically used to process a request and send back response in the web applications. Tomcat is an example of a popular Web Container. JEE specifications or technologies in this group receive the request from web server and send back the response, typically, in an HTML format.Ĭlasses in the presentation layer are mostly executed in a Web Container - it is a part of the application server that handles web requests. We will see the most commonly used specifications here. However, note that the following is not the exhaustive list of all the specifications in JEE.

We will see how to use these APIs in more detail in subsequent chapters. The following is the brief description of each of the JEE specifications in different layers of applications that we saw previously. Hibernate tools crash to read metadata from SQL server with sqljdbc4. M6 downloads available today are invalid packages for OSX. When started Eclipse displays a message: the Eclipse executable launcher was unable to locate its companion shared library. Toolbar contatining run,debug and breakpoints missing if customize perspective is used than eclipse oxygen crashes in ubuntu 64bit. ITS team has blocked eclipse several operations due to absence of digital signature.