Comments for Piotr Nowicki's Homepage

Comment on Java EE 7: JMS 2.0 With Glassfish v4 by Piotr

Piotr — Sun, 12 May 2013 13:32:58 +0000

Hello Gregory,

Yeah, while I was testing JMS 2.0 I also thought it seemed very close to Sprint Framework's JMSTemplate. I guess that even before JMS 2.0 people from Java EE world would do the same using @Produces methods that take care of all the underlying mess. Nevertheless, it's good to have such features in the specification itself.

Thanks for your comment!

Piotr

Comment on Java EE 7: JMS 2.0 With Glassfish v4 by Gregory Boissinot

Gregory Boissinot — Sun, 12 May 2013 12:59:25 +0000

Thanks.
It is close to Spring JmsTemplate features
- Reduces boilerplate code
- Manages resources transparently
- Handles exception properly
- Converts checked exceptions to runtime equivalents
- Provides convenience methods such as the convertAndSend() method that take a destination (a queue here) and a payload object as message.

Comment on After the Spring 3 Core Training by Parag Lohiya

Parag Lohiya — Tue, 30 Apr 2013 02:59:57 +0000

The US prices are $2750 roughly right now

Comment on Types of EntityManagers: Application-managed EntityManager by Cris

Cris — Fri, 19 Apr 2013 10:25:17 +0000

Very well structured article. It actually compress a lot of documentation
into a short, concise and very well structured article. Good job and thanks for the article.
I would highly recommend this article.

Comment on JPA and CMT – Why Catching Persistence Exception is Not Enough? by JPA与CMT – 为什么单纯捕捉持久化异常是不够的？ - ImportNew

JPA与CMT – 为什么单纯捕捉持久化异常是不够的？ - ImportNew — Fri, 19 Apr 2013 03:42:12 +0000

[...] 英文原文，编译：ImportNew - 陈晨 [...]

Comment on JPA and CMT – Why Catching Persistence Exception is Not Enough? by Jude

Jude — Wed, 17 Apr 2013 12:03:45 +0000

Amazing stuff dude, this is exactly what I needed to find out.

There are a handful of other issues I got concerning this, but I guess
I can not be greedy. One answer at a time. Back to the web
to find out what I need! Once again…. excellent post, nicely written!

Comment on Java EE 6 SCWCD Mock Exam by Luk

Luk — Sat, 13 Apr 2013 16:23:05 +0000

Here is another place where you can test yourself on various Java EE topics:

http://www.codelect.net/TestDetails/Java%20EE%20Enterprise%20Application%20test%20for%20Seniors

This site also offers specific tests per Java EE topic, like JPA, EJB and JTA

Comment on After the Spring Core 3.0 Exam by Bill

Bill — Thu, 11 Apr 2013 20:25:57 +0000

I passed the examine at the end of January with a score 96, but did not receive anything, neither soft nor hard copy of the certificate since then. It seems I have to make a specific request to get one. It is very bad since this is a paid service.

Concerning the test itself, I think strictly stick with the official guide is sufficient. The most quoted materials, including Jeanne’s core spring 3 certification experiences and the two paid Skill Guru’s mock examines, are overdo. The third free mock test in Skill Guru is actually closer to the real test, although the English of the question is not perfect.

Comment on Entities as Local Interface Parameters Can Harm You by Piotr

Piotr — Fri, 05 Apr 2013 16:32:06 +0000

Thanks for kind words Dmitri!

Well, I think that the EJB specs hardly dictates that every remote interface used must obey to pass-by-value semantics. I agree with you - app server is able to make some kind of optimization if it recognizes it is within the same JVM - e.g. no marshalling and umarshalling may occur but the whole pass-by-value must be obeyed. I think it helps if you think about clustered environment. Sometimes you hit the remote object within the same node in the cluster and sometimes you don't. You don't have to control it (and most probably you shouldn't). Now if the AS will optimize the access sometimes it would act like pass-by-value and sometimes like pass-by-reference which might blow in a developer's face in less expected time.

AFAIR I was testing it on JBoss AS 7.1.1 or EAP 6.1 - don't remember it exactly right now, sorry.

Cheers!

Comment on Entities as Local Interface Parameters Can Harm You by Dimitri

Dimitri — Fri, 05 Apr 2013 16:11:32 +0000

Interesting topic, thank you! I’m very surprised by the results of TxMergeRemote self-injection.

All application servers I know do optimize the @Remote communication, if the target SLSB is in the same JVM with the Caller. Hence I would expect the same call-by-reference issue.

What was your test environment for this case?