Scopes
Scopes
 
 
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Frequently Asked Questions

Questions

1. General

1.1. What is Scopes?

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Scopes is a library that revolutionize the way to access web application context. Instead of using HttpServletRequest, HttpSession, etc. it provides a State object that can be used almost on all layers of your web application.

It is also a framework that lets you build new scopes.

1.2. Why the "State" object has this name?

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Because the "State" represents the web application in a particular state. Therefore it can be used in a stateful domain object.

2. Use in web application

2.1. What are the prerequisites for the use of Scopes?

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To use Scopes you need a Java 1.5 compliant Runtime Environment and a Servlet 2.3 container. For example, JRE 5.0 and Tomcat.

2.2. Do I need to use Scopes with some framework?

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No, you can use it even with a bare servlet.

2.3. How do I configure Scopes for my web application?

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See Installation.

2.4. What scopes are supported by Scopes natively?

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At present time, Scopes supports request, window, session and application scope.

2.5. What is "init-base application" scope?

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The "init-based" application scopes is the normal application scope; the only difference is in its use: instead of accessing ServletContext through an HttpServletRequest, it is initialized at startup. See more details.

2.6. What is "click" scope?

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The "click" scope is a new scope that enables to use attributes that are persistent through redirections. See more details.

2.7. What is "window" scope?

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The "window" scope is a new scope that enables you to have different attributes for different windows. See more details.

2.8. Why Scopes does not support "page" scope?

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Because "page" scope is an artefact used only in JSP pages and it is like defining a variable in a page.