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From "Christophe Lombart" <christophe.lomb...@gmail.com>
Subject Re: Web app design pattern questions
Date Tue, 19 Jun 2007 14:09:39 GMT

DTO is a nice design pattern.
Why not to use the Jackarabbit ocm tools (see in
By this way, you can have your wrapper classes/DTOs matching to JCR nodes.


On 6/19/07, bilobag <bilobag@hotmail.com> wrote:
> I am in the beginning stages of a web based CMS tool using JSF, Spring and
> Jackrabbit.  Please give any design advice you may have for the following
> questions:
> 1) I have 3 node types. Content, book, magazine.  Book and magazine extend
> the content type.  They all have some common properties and some different
> properties.  Now I first thought about creating wrapper classes that just
> wrap the Node object and provide getters/setters for any properties I have
> for each nodeType.  However, I am unsure if this is a good idea possibly
> because of locking and concurrency issues.  I don't know if its a better
> idea to have data transfer objects instead to move data to/from the front
> end.  However, its more work to have to copy the propertys to/from the DTO
> objects back into the node, but it could be the safer design.
> 2) When adding a node, if I use my node wrapper classes, I will call
> addNode() on the parent and wrap the child node.  Then forward to the form
> page where the node data is entered...then call save().  The only issue is
> that when you call addNode, you need to specify the path/name of the node.
> I will not have this information until after the user submits the form.
> First, how important is the path/name of the node?  To me it seems like it
> should always be unique amongst nodes with the same parent.  Second, this
> goes back to my first question where i'm not sure whether to use DTO's or
> node wrapper classes.  If i use DTO's, adding won't be an issue.  Please
> give any design advice you may have.  Thanks.
> --
> View this message in context:
> http://www.nabble.com/Web-app-design-pattern-questions-tf3946577.html#a11195283
> Sent from the Jackrabbit - Dev mailing list archive at Nabble.com.

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