This week's book giveaway is in the OO, Patterns, UML and Refactoring forum.
We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma on-line!
See this thread for details.
The moose likes OO, Patterns, UML and Refactoring and the fly likes FrontController and Command Pattern together Big Moose Saloon
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FrontController and Command Pattern together

Phani Sajja
Greenhorn

Joined: Mar 08, 2009
Posts: 3
I am currently developing a web application and trying to implement FrontController design pattern. FrontController delegates incoming requests to a RequestHelper, the helper intern creates a command based on the url-pattern. The command executes and returns the next view. My problem is When the command executes it gets a list of items for view, the client selects one of the items for further processing. When the user selects an item it generates a new command based on the url-pattern and the list is no more accessible. How to keep the list even after executing a new command. I dont want to use a "HttpSession" or "ServletContext". Is there any alternative or a pattern for preserving the list for feature. Please help me.
Bear Bibeault
Author and ninkuma
Marshal

Joined: Jan 10, 2002
Posts: 63211
    
  69

phani sajja wrote:I dont want to use a "HttpSession" or "ServletContext"

Why not? That's what they're for.

That's like saying "I don't want to use a hammer to bang in a nail".


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David Newton
Author
Rancher

Joined: Sep 29, 2008
Posts: 12617

Hopefully the OP just meant they don't want to use it directly? In which case give an attribute map to the controller and/or command.
Bear Bibeault
Author and ninkuma
Marshal

Joined: Jan 10, 2002
Posts: 63211
    
  69

I'm hoping so. So many times in these forums we've seen the admonition to use the session wisely twisted into "Don't use the session!".
 
Have you checked out Aspose?
 
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