RE: Use of stuts in J2EE

[Parnenzini Claudio]

Personally I like to use two kind of data object, one that contains all
screen datas ( ViewDataObject ) and an other one that comes from the
persistence layer ( PerDataObject ). My Action class receive the ViewData
object and if needed copy datas to the ActionForm. This permit to separate
pure application development from the GUI development with Struts.

In resume I have the followings class:

1) Persistence Layer contains
PerData object:
They are mapped to a table of my Database and have only getter and setter
methods.

Per object (Actually they are not EJB, sorry):
They contains my JDBC transactions, with the followings methods save(),
delete(), findByPrimaryKey() and findAll(). All methods receive
PerDataObject.

2) Presentation layer:

ViewData object:
Are mapped to a screen of my application and have only getter and setter
methods.

Controller object:
They aggregate if needed, PerData object and do some presentation
manipulation. The Controller object is used by the Action class.

For the business layer, if you need one, you can create Bus object and
BusinessData object. Your presentation layer will receive BusData object.
The other solution is to use your Business object directly into the
Controller.

If you are using EJB's for the persistence layer, i suggest you to add a
Connector object between layers or use the Proxy Pattern.

Certainly my pattern is not perfect, but we develop in this way sufficiently
fast and the code is reusable. I will appreciate any comment, suggestion to
improove, this design pattern.

Regards

-Message d'origine-
De : Vikram Goyal01 [mailto:[EMAIL PROTECTED]]
Envoyé : mercredi, 13. mars 2002 09:52
À : Struts Users Mailing List
Objet : RE: Use of stuts in J2EE


Hi Dave,

Thanks for that info. I have one question.

When your formbean captures the data that the user has submitted, how do
you pass this data to the app layer? If you pass the same form bean,
then your app layer is not usable by other clients (or they will also
have to implement struts). Basically my question is, how do you process
your form bean into a data object? If you create another data object at
this point, isnt that a performance overhead?

Rgs
Vikram

-Original Message-
From: Dave J Dandeneau [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, March 13, 2002 10:10 AM
To: [EMAIL PROTECTED]
Subject: RE: Use of stuts in J2EE


We are currently implementing a j2ee / struts project. If I had any
advice to you it would be to make sure you read up about common j2ee
patterns. They can save you a lot of time and help you avoid some of the
common EJB problems. We are using a command pattern which works very
well. It is similiar to a session facade pattern where there are session
beans that run all of the logic on the ejb container and send only the
results back to the actions. This helps reduce network overhead, and
makes transactions very simple. There are a million different patterns
out there, and the most common ones are available at Sun's site:
http://developer.java.sun.com/developer/technicalArticles/J2EE/patterns/

Other than that I don't think that working with struts and EJBs is much
different than working with EJBs on a non-struts application.

Thanks,
dave dandeneau

-Original Message-
From: Vikram Goyal01 [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, March 12, 2002 10:50 PM
To: [EMAIL PROTECTED]
Subject: Use of stuts in J2EE


Hi all,

I am implementing a J2EE (Enterprise application with EJBs) project
using struts. If anyone has done a similar project and would like to
share some guidelines please mail back to me. Alternatively, if you have
any online pointers, articles etc. please forward these as well.

Regards
Vikram Goyal

--
To unsubscribe, e-mail:

For additional commands, e-mail:



--
To unsubscribe, e-mail:

For additional commands, e-mail:



--
To unsubscribe, e-mail:

For additional commands, e-mail:



--
To unsubscribe, e-mail:   
For additional commands, e-mail: 

RE: Struts 1.1 book available for order

[Parnenzini Claudio]

It seems that is not possible to order your book outside of the US.

Regards

-Message d'origine-
De : Vic Cekvenich [mailto:[EMAIL PROTECTED]]
Envoyé : vendredi, 30. novembre 2001 18:26
À : [EMAIL PROTECTED]
Objet : Struts 1.1 book available for order


http://www.atlasbooks.com/marktplc/00670.htm

You can order it today, and it will ship next week.

It will be on Amazon, etc. in a few more weeks, it takes time. This is
the fastest way I know to publish it.

Vic


--
To unsubscribe, e-mail:

For additional commands, e-mail:



--
To unsubscribe, e-mail:   
For additional commands, e-mail: