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Posted to users@wicket.apache.org by "Mathias P.W Nilsson" <ma...@snyltarna.se> on 2007/08/12 21:15:32 UTC
Real example on Wicket
Hi all!
I'm in a aqward situation and thinking of swithing from Struts2, JSTL, Tiles
to Wicket. I've bought the book Pro Wicket and read 4 chapters. The book is
very good but I need a real life application tutorial.
My application today integrates with Hibernate. I shouldn't call the DAO it
the WebPage classes should I?
How about Session Facade pattern and Wicket. How is this done in a real
world application?
Very thankful for replies!
// Mathias
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Re: Real example on Wicket
Posted by Edvin Syse <ed...@sysedata.no>.
> try
>
> mvn -Declipse.workspace=<workspace> eclipse:add-maven-repo
>
> replace <workspace> by your workspace location, like /home/user/workspace
> that should add M2_REPO to the variables set
Better yet, install the m2eclipse plugin from:
http://m2eclipse.codehaus.org/update/
This will keep the dependencies on your classpath in sync automatically, and also add the M2_REPO variable :)
-- Edvin
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Re: Real example on Wicket
Posted by "Mathias P.W Nilsson" <ma...@snyltarna.se>.
If finally got it to work. Problem with Maven since it totally new to me. Got
it running now :jumping: Thanks!
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Re: Real example on Wicket
Posted by Al Maw <wi...@almaw.com>.
Mathias P.W Nilsson wrote:
> Thanks you but the errors still remain :(
Restart eclipse and they will go away.
Al
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Re: Real example on Wicket
Posted by "Mathias P.W Nilsson" <ma...@snyltarna.se>.
Thanks you but the errors still remain :(
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Re: Real example on Wicket
Posted by Favio <fa...@livra.com>.
On Tuesday 14 August 2007 12:14, Mathias P.W Nilsson wrote:
> Thanks!
>
> I've check out the project in Eclipse but there are error messages all over
> the place. They mostly consist of M2_REPO error. Is this maven 2? How can I
> bypass this?
try
mvn -Declipse.workspace=<workspace> eclipse:add-maven-repo
replace <workspace> by your workspace location, like /home/user/workspace
that should add M2_REPO to the variables set
Favio
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Re: Real example on Wicket
Posted by "Mathias P.W Nilsson" <ma...@snyltarna.se>.
Thanks!
I've check out the project in Eclipse but there are error messages all over
the place. They mostly consist of M2_REPO error. Is this maven 2? How can I
bypass this?
Thanks
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Re: Real example on Wicket
Posted by Eelco Hillenius <ee...@gmail.com>.
> I'm in a aqward situation and thinking of swithing from Struts2, JSTL, Tiles
> to Wicket. I've bought the book Pro Wicket and read 4 chapters. The book is
> very good but I need a real life application tutorial.
>
> My application today integrates with Hibernate. I shouldn't call the DAO it
> the WebPage classes should I?
> How about Session Facade pattern and Wicket. How is this done in a real
> world application?
A good start is to look at the phonebook example:
https://wicket-stuff.svn.sourceforge.net/svnroot/wicket-stuff/trunk/wicket-phonebook
See whether looking at that gives you some ideas.
Eelco
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Re: Real example on Wicket
Posted by "Mathias P.W Nilsson" <ma...@snyltarna.se>.
Thanks!
I will dive into the code. It's very hard for me to follow it all. I'm and
independent programmer and do not sit in a team with developers. So to learn
new techniques probably takes longer time. The spring framework looks huges.
But it seems like everybody uses it, although I don't really know why!
Thanks any way. Will look into this.
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Re: Real example on Wicket
Posted by Ryan Holmes <ry...@hyperstep.com>.
Our application uses Spring, Hibernate and Wicket with a traditional
service facade architecture and I think it's a good choice for medium
to large code bases (although possibly overkill for smaller
projects). The service facades provide a convenient place to define
transactionality and they keep most of the business logic out of the
UI. Having said that, there's nothing wrong with injecting DAO's into
your Wicket components and skipping the service facade, but the lack
of that tier may be a problem as your code base grows. Here are a few
implementation details that might help you get things up and running:
1) We use Wicket's Spring annotation support (http://www.wicket-
wiki.org.uk/wiki/index.php/Spring#Annotation-based_Approach) to
inject facade beans into pages and components, like so:
@SpringBean
private MyServiceBean myServiceBean;
The initial configuration is slightly tricky, but only because wicket-
spring offers several completely different approaches to injecting
beans.
2) About the only specific support for Hibernate (although it's
easily adaptable to any ORM) in our Wicket classes is the fairly
heavy use of this model (comments and equals/hashcode removed for
clarity):
public class EntityModel extends LoadableDetachableModel {
private final Class<?> clazz;
private final Serializable id;
public EntityModel(Persistable object) {
this( Hibernate.getClass( object ), object.getId(), object );
}
public EntityModel(Class<?> clazz, Serializable id) {
this.clazz = clazz;
this.id = id;
}
public EntityModel(Class<?> clazz, Serializable id, Object object) {
super( object );
this.clazz = clazz;
this.id = id;
}
@Override
protected Object load() {
return HibernateSessionLocator.getSession().get( this.clazz,
this.id );
}
@Override
public int hashCode() {
// Hash code based on clazz and id.
...
}
@Override
public boolean equals(Object obj) {
// Equals based on clazz and id.
...
}
}
That first, very convenient constructor is made possible because all
of our persistable domain objects implement a Persistable interface
that defines the getId() method -- you might want to consider
something similar. Note the use of Hibernate.getClass() in that
constructor, which makes it safe to pass in a Hibernate proxy.
3) The only other Hibernate-specific code we have in our Wicket
classes is something along the lines of
'HibernateSessionLocator.getSession().get(...)' to retrieve domain
objects. We use backing beans in our forms and so we often need to
fetch domain objects based on a primary key stored in a bean. You
could of course use a DAO or service facade method to keep this kind
of thing nicely abstracted away from your Wicket code.
btw, we're using Wicket 1.2, but I think everything mentioned here
applies equally to 1.3.
hth,
-Ryan
On Aug 12, 2007, at 12:15 PM, Mathias P.W Nilsson wrote:
>
> Hi all!
>
> I'm in a aqward situation and thinking of swithing from Struts2,
> JSTL, Tiles
> to Wicket. I've bought the book Pro Wicket and read 4 chapters. The
> book is
> very good but I need a real life application tutorial.
>
> My application today integrates with Hibernate. I shouldn't call
> the DAO it
> the WebPage classes should I?
> How about Session Facade pattern and Wicket. How is this done in a
> real
> world application?
>
> Very thankful for replies!
>
> // Mathias
> --
> View this message in context: http://www.nabble.com/Real-example-on-
> Wicket-tf4257796.html#a12116996
> Sent from the Wicket - User mailing list archive at Nabble.com.
>
>
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> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
> For additional commands, e-mail: users-help@wicket.apache.org
>
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