[STR-2142] Replacement of LookupDispatchAction

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 1.1.0
• Component/s: Extras
• Environment: Operating System: All; Platform: All
• Bugzilla Id: 30292
• Assignee: David Evans
• Reporter: Jean-Baptiste Nizet
• Created: 23/Jul/04 18:42
• Updated: 02/May/13 02:28
• Resolved: 25/Apr/06 02:08

Description

LookupDispatchAction is useful as a DispatchAction when you have multiple
buttons on the same form. However, I think another powerful way to solve this
problem could be used: select a method from a list defined in the mapping
parameter attribute by checking the presence of o request parameter name.
See the following cut'n pasted javadoc for details, and see the following
attachment for an implementation.

/**

• This class has the same goal as the DispatchAction: select the appropriate
• method to execute based on a request parameter. The way to determine which
• method to call works in a different way, though. The parameter attribute of
• the mapping contains a list of method names. If one of the request parameters
• has the same name as one of the method names specified in the list of method
• names, this method is executed. If none of the request parameters has one
• of the method names, the unspecified method is invoked. <br />
• This class has the same goal and utility as the LookupDispatchAction: it
• allows having several submit buttons on the same form. All that is needed with
• this class is to give each button a different name (example: preview/post).
• It's more powerful than the LookupDispatchAction for several reasons, though:
• <ul>
• <li>The submit buttons don't need to be declared in the various
• internationalized ApplicationResources.properties files (useful if JSTL
• tags are preferred to the Struts tags)</li>
• <li>It's more performant</li>
• <li>Two submit buttons may have the same text</li>
• <li>Links can easily use this kind of action as well as buttons
• (ex: doThis.do?preview=&subject=...)</li>
• <li>Hidden fields may easily be used to select the method
• (ex: <input type="hidden" name="preview"/> )</li>
• <li>There is no need for the developer to override any abstract method</li>
• </ul>
• @author Jean-Baptiste Nizet
  */

Issue Links

• is depended upon by: STR-2457 Provide better support for dialogs; avoid POSTDATA situations