JPA With Hibernate?

answered 2007-02-22 13:13:29 +0800

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By: henrichen

Are you saying Java Persistence API (JPA)? Well, we don't have such tutorial yet. Would you contribute one? The ZK community would appreciate it.

/henri

answered 2007-02-22 14:35:00 +0800

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By: kkurt

Ok, i have already a ZK project runs on JPA with Hibernate. I will contribute a basic tutorial.

answered 2007-02-23 07:43:06 +0800

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By: henrichen

Thanks. Looking forward to that.

/henri

answered 2007-02-26 03:56:12 +0800

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By: henrichen

When you are ready. Send it to henrichen AT zkoss DOT org. Thanks

/henri

answered 2007-08-01 15:48:31 +0800

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By: kknop

Is this tutorial already available?

answered 2007-08-01 16:31:46 +0800

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By: kknop

I found an JPA helper class at:
http://www.koders.com/java/fidD4B2D2CDF6FFB7430B2E2B08BBE22E2AFB52723C.aspx

And I want to create an OpenSessionInViewListener based on the ZK plus code but I am don't know what to do with handleStaleObjectStateException and handleOtherException.

Is there an example of an already working and proven JPA OpenSessionInViewListener?
Am I right that I only need these two classes (helper and listener) with the new 2.4.1 feature: "ThreadLocal Variables Synchronization"
(http://www.zkoss.org/smalltalks/zk2.4.1/zk2.4.1.dsp) to get it to work?

answered 2007-08-01 20:08:14 +0800

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By: sousa1981

Go to: http://en.wikibooks.org/wiki/ZK/How-Tos
Direct Link: http://en.wikibooks.org/wiki/ZK/How-Tos#ZK_2.x.x_.2B_Spring_2.x.x_.
2B_Hibernate_3.x_.2B_JUnit_Test

There is an entry ZK 2.x.x + Spring 2.x.x + Hibernate 3.x + JUnit Test So, you could modify it to use JPA easily or use both together Hibernate and Jpa Implementation.

To change to use only JPA, do the following:
1. Under "C. Code - Data Access Object Layer:", on EmployeeDaoImpl.java and RoleDaoImpl.java modify Change hibernate3 to jpa under IMPORTS Change HibernateDaoSupport to JpaDaoSupport Change getHibernateTemplate to getJpaTemplate

2. Modify spring-sql.xml to use
org.springframework.orm.jpa.ContainerEntityManagerFactoryBean

Look at http://blog.springframework.com/markf/ to do that

3. There is no step 3. Run test case.

I am using ZK in second largest banking in mozambique and our users is very happy like me :)

I am finishing my site, so soon I will publish it. There will be many of my daily work.

> Spring x Hibernate x JPA with ZK
> Web Service with XFire build with and without Spring with ZK JMS
> Service with Spring with ZK I will expose many of tools, to make my
> job be fast (CODE GENERATION) of DAO
Layer and I now I am build same tools to make ZK Layer Generated fast and automatic (basic needs).

> So, I will write an Wish list for ZK releases.

Regards,

Marcos de Sousa

answered 2007-08-01 20:17:16 +0800

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By: sousa1981

spring-sql.xml, those code is nice, work great, but I will modify because need same upgrade.

The Configuration is more easy if it use AOP.

The DAO don't need any transaction management.

Only manager need transaction management, so it will reduce the code significantly.

And the use of Universal DAO, will be more nice on second explanation.

Regards,

Marcos de Sousa

answered 2007-08-02 08:18:50 +0800

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By: kknop

Hi Marcos,

Thanx for your help. I saw your description and I think that you made some very good choices. In the past I used JSF + Spring + Hibernate with their OpenSessionInViewFilter myself and in the teams I lead. It works really great and it really speeds up the development comparing it to Struts etc.

Now that I found ZK I also decided to take a look at JPA with annotations and I discovered that it simplified my work more and more. Many applications don't need transactions and for these applications I personaly like the most simple and lightweight architecture. If an applications starts needing transactions, it is always possible to integrate Spring afterwards. And because I am a big fan of tomcat, I am looking for a proven thread safe integration of ZK with JPA, without the use of Spring or an application server.

I did a lot of front-end development myself and until I found ZK I was convinced that JSF was the way to go. Comparing it to JSF I think the guys did it, big compliment to all the ZK developers!!! Keep up the good work, in my opion the next hibernate under the GUI frameworks :-)

Klaas Knop