Struts 2 - Basic

Set up and Configuration Interceptors Stacking and writing interceptors and the framework interceptors are not covered.

• Undestand and explain interceptor mechanism
• Describe interceptors configuration

Actions Results When an Action class method completes, it returns a String whose value is used to select a result element.

• Describe the way to determine the result for an action (annotation and code behind plugin are not covered).
• Name the predifined result names defined by the ActionSupport base class.
• Describe the base result types below semantics:
  • Dispatcher Result
  • Redirect Result
  • Redirect Action Result

All the other result types (Chain, Freemarker, HttpHeader, Stream, Velocity, XSL, PlainText, Tiles)are not covered. Value Stack/OGNL

• Explain the purpose of the value stack.
• Describe the OGNL usage in struts2 (only this part of OGNL is covered).
• List the default variables in the value stack.
• Enumerate the object that are in the value stack and their usages.
• Write code that can acces to object placed on the value stack.
• Describe the several ways you can access the value stack.

Basic validation

• Explain the step by step basic vaildation workflow
• Describe the role of the following elements in the basic validation process:
  • Action
  • Input form
  • validators in the xml file.

Tags Identify the difference between Generic tags and UI tags.