ServletContext has a APPLICATION SCOPE .. [GLOBALLY ACCESSIBLE ACROSS THE PAGES] ServletContext has a SESSION SCOPE.. [LOCAL SCOPE......which is mostly used for intialising purpose].
Application *scope* Application *scope* is the broadest *scope* and should only be used when necessary. You can create objects bound at application level in JSPs that are not session-aware, so application *scope* is useful for storing information when using these types of JSPs. You can also use application-bound objects to share data among different sessions of the same application. When you no longer need objects bound to an application, you should explicitly remove them to free up memory resources. *Session* *scope* In my experience, *session* *scope* is more commonly used than application * scope*. *Session* *scope* allows you to create and bind objects to a * session*. You must create objects bound to the *session* in session-aware JSPs and make them available to all JSPs and servlets in the same *session*. *Session* *scope* is often used for managing security credentials and for managing state among multiple pages (such as in a Web-based wizard). As with application *scope*, objects bound to *session* *scope* should be explicitly removed when no longer needed. Also, I typically make classes serializable if I intend to bind their instantiations to the *session* *scope*. You have a few scopes that you can use: Request Page Session Application If you have a request scope, it will only run for the request that is made on that same moment. If you have a page scope, the parameters and values will run for that page the whole time until the server is restarted. If you have a session scope, all the values will be kept for until the clients session is destroyed. And least the application scope, if you apply the application scope, the values will be kept for the entire application, until the server is restarted. On Fri, Oct 9, 2009 at 4:52 AM, Amita Engineer <amitaengin...@gmail.com>wrote: > > I am confused with > > "Create (and initialize) a Person object and save it as an attribute > called person in the ServletContext scope" > > > What is ServletContext scope ? > > > > -- Y!M: maiminhhoang --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Java EE (J2EE) Programming with Passion!" group. To post to this group, send email to java-ee-j2ee-programming-with-passion@googlegroups.com To unsubscribe from this group, send email to java-ee-j2ee-programming-with-passion+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/java-ee-j2ee-programming-with-passion?hl=en?hl=en -~----------~----~----~----~------~----~------~--~---
