Comments for Matt's Blog

Comment on EJB 3.1 and JSF 2.0 with GlassFish V3 Prelude by malen christian

malen christian — Thu, 03 Dec 2009 23:26:43 +0000

Hi,
Thanks for your tuto.
With Java 1.6 and JSF 2.0 I had to modify the import statement of BookManagedBean.java :
“import javax.faces.bean.ManagedBean;
import javax.faces.bean.SessionScoped;” (from model to bean ) with (jsf-api version 2.0.2-b10 in pom.xml)

to make it compiling.
There is a warning that I do not understand :
The expression ${pom.artifactId} is deprecated. Please use ${project.artifactId} instead.
Any idea ?
thanks very much since your tuto had been very helpfull !

regards
cm

Comment on EJB 3.1 and JSF 2.0 with GlassFish V3 Prelude by Matthias Rüedlinger

Matthias Rüedlinger — Fri, 27 Nov 2009 18:13:37 +0000

Hello Steve

Thanks for your comment.

Concurrency is a common problem for web applications. My example is a bit outdated and was attempt to show how ejb 3.1 and jsf interact together in a pre-release of galssfish.

So the keyword to your problem could be locking / optimistic locking.

Perhaps the following article can help you.

Locking and Concurrency in Java Persistence 2.0
http://blogs.sun.com/enterprisetechtips/entry/locking_and_concurrency_in_java

or when your work with Hibernate
http://docs.jboss.org/hibernate/core/3.3/reference/en/html/transactions.html

Regards

Matt

Comment on EJB 3.1 and JSF 2.0 with GlassFish V3 Prelude by Steve

Steve — Fri, 27 Nov 2009 12:16:13 +0000

Thanks for the great tutorial. Info on JSF2 is thin on the ground and I found your blog very enlightening.

With regard to storing the book being edited in a session scoped bean:- it seems the faces session is equivalent to the HttpSession and therefore the user can only edit one book at a time?

Even worse, if the use opens two records for edit at the same time they can overwrite the wrong record!

I’ve noticed that if
- I open the list in two browsers tabs
- select book 1 in the first
- select book 2 in the second
- edit and save book 1 in the first
- then book 2 is actually updated with the data entered for book 1.

(complicated but, unfortunately, within the realms of possibility for the average user)

I’m new to JFS so I’m wondering if I’m missing something? Is there a way around storing the entity bean in the session?

I’ve been racking my brain for a way to start a transaction (txn) at the edit action, then pick up the same txn object at the save, delete actions? #{BookBean.txnBook.title} kind of thing?

Can you offer any guidance to a Noob?

Thanks,
Steve.

Comment on .Net (C#) and SOAP with Attachments by Michelangelo P

Michelangelo P — Mon, 16 Mar 2009 09:36:41 +0000

SharpMimeTools is changing the encoding of the binary attachments I’m receiving, rendering them useless.
Right now I’m trying to manually split the byte stream without converting to string and see how that goes.
Thanks a lot for your article, it still helped a lot!

Comment on More readable and typeable… by Matthias Rüedlinger

Matthias Rüedlinger — Fri, 27 Feb 2009 07:45:34 +0000

I forgot to mention that there is also the logicalpractice-collections library, which you can use on collections in a more sophisticated way than hamcrest-collections.

http://code.google.com/p/logicalpractice-collections/

Comment on JYaml – YAML for Java by surajz2004

surajz2004 — Fri, 20 Feb 2009 17:25:06 +0000

You need to use this library
https://jvyaml.dev.java.net/

if you are loading yml files written by ruby or perl. JYaml is not able to load complex yaml file.

Comment on JYaml – YAML for Java by Immo Huneke

Immo Huneke — Tue, 17 Feb 2009 14:47:05 +0000

YAML looks quite nice, but how seriously can you take something co-written by someone whose surname ostensibly is “döt Net”? (c:

Comment on EJB 3.1 and JSF 2.0 with GlassFish V3 Prelude by Matthias Rüedlinger

Matthias Rüedlinger — Wed, 04 Feb 2009 17:19:02 +0000

Thanks Cay for the hint.

Cay said:
> In your example, you (or maybe Maven) put persistence.xml in
> two places,
> and it took me a while to find out where it needs to go. I put an
> example with an Ant script at
> http://weblogs.java.net/blog/cayhorstmann/archive/2009/02/towards_java_ee.html

Comment on EJB 3.1 and JSF 2.0 with GlassFish V3 Prelude by Cay Horstmann

Cay Horstmann — Sun, 01 Feb 2009 15:42:53 +0000

I tried this today and got the following error message that is only too familiar from the bad old days:

message: Exception while deploying the app : java.lang.RuntimeExceptio
n: Invalid ejb jar [CRUD-GFv3]: it contains zero ejb.
Note:
1. A va
lid ejb jar requires at least one session, entity (1.x/2.x style), or
message driven bean.
2. EJB3+ entity beans (@Entity) are POJOs and
please package them as library jar.
3. If the jar file contains vali
d EJBs which are annotated with EJB component level annotations (@Sta
teless, @Stateful, @MessageDriven), please check server.log to see wh
ether the annotations were processed properly.
exit-code: FAILURE

Any clue what might have changed?

Thanks,

Cay

Comment on EJB 3.1 and JSF 2.0 with GlassFish V3 Prelude by Jonas

Jonas — Fri, 26 Dec 2008 23:29:47 +0000

I tried to implement the same application with Grails on GlassFish V3 Prelude.

I wrote a post about that here:
http://blog.jonasbandi.net/2008/12/simplistic-crud-application-with-grails.html