Posts tagged jee
Dear Java/JEE developer – why should you care about ADF?
1Whether you are deciding on the framework to use for your next Java web or mobile project or whether you are contemplating your next career step as a Java EE developer, ADF should be on your short list for consideration. With a new free version, deployment on many application servers including Tomcat, JBoss and GlassFish, extended support in both Eclipse and JDeveloper, and a Java based mobile solution for both iOS and Android – ADF has a lot to offer.
ADF is the Java EE Application Development Framework from Oracle. ADF allows developers to develop rich, enterprise grade Java web and mobile applications in a very productive manner. Many of the generic (plumbing) concerns that need to be addressed for most Java/JEE applications are taken care of by the framework – allowing developers to focus on the business specific functional areas. The initial 80% of the application is created through largely declarative development – 4GL style. The remaining 80% is dealt with in a fairly ordinary coding style, similar to plain Java EE development or to development using other frameworks.
This article discusses the question why any Java/JEE developer should know and care about ADF. It will More >
JavaOne 2012: The Big Stories
4The show is over, the people are gone and the cleaning can start.
What do we take home from JavaOne 2012?
That depends on who you ask. Some people primarily will have taken goodies from the exhibition floors with them while other may have focused on less tangible goods and gone for inspiration and vision. After the heyday (2006/2007), some waning years and the robust recovery (2011) after an initially tentative turn around (2010) this year seems to have been one of consolidation and careful further evolution. Some choices have been made – not all of them popular but most apparently sensible and reliable because backed by commercial sense.
Dinsdag 18 september: Oracle Open World & JavaOne 2012 Preview mini-conferenties – 12 presentaties op 1 avond
0Van 30 september tot 5 oktober is San Francisco weer het domein van tegen de 45.000 deelnemers aan de Oracle Open World en JavaOne conferenties. Ruim 2000 presentaties worden daar gehouden, in vele tientallen zalen in hotels en het Moscone Conferentie Center in downtown San Francisco, waaronder pakweg 20 door Nederlandse sprekers. Hoewel honderden Nederlandse bezoekers op deze conferentie aanwezig zullen zijn, zijn er natuurlijk ook veel ‘thuisblijvers’. Om deze groep (en iedereen die wel gaat) toch of alvast een voorproefje te geven, organiseert AMIS voor de vijfde keer de Preview sessie voor Oracle Open World en JavaOne – een avond waarop Nederlandse sprekers met een OOW en/of JavaOne verleden, heden of toekomst een presentatie houden, bijvoorbeeld als generale repetitie voor hun optreden in San Francisco.
Deze sessie is gratis toegankelijk. Aanmelden kan via de AMIS website: Preview Oracle Open World en JavaOne 2012. De deuren gaan open op dinsdag 18 september om 16.30, om 18.00 uur is er een maaltijd en rond 21.00 uur eindigen de laatste vier sprekers en openen we de bar.
Sprekers tijdens deze preview zijn: Steven Davelaar, Lonneke Dikmans, Ronald van Luttikhuizen, Jacco More >
WebLogic 12c: Use JPA in your Web Application
3Where as in WebLogic 11g JPA was not support by default, in WebLogic 12c it is the default persistency provider.JPA 2.0 is part of JAVA EE 6.
I was trying some new JAVA EE 6 features in WebLogic 12c, so here is a is a way to create a Web Application with JPA under WebLogic 12c
Some of the JAVA EE 6 specifications we’re already supported in WebLogic 11g. JPA 2.0 was one of them. Though version 1.0 was the default. 2.0 also worked.Unless an explicit <provider>…</provider> wass specified in the persistence.xml file of a deployed application, WebLogic 11g used OpenJPA/Kodo by default.
The default JPA provider setting is exposed via a new MBean: JPAMBean on the DomainMBean, and persists the configuration into the config.xml file.
Furthermore, you needed to install the patch QWG8 – Enable JPA 2.0 support on WebLogic Server.
To make it work on 11g, you had to use Oracle TopLink as the persistency provider like the image shows you in the WebLogic Admin Console
Now for 12c this is not needed anymore, TopLink will be the default JPA Provider
Sharing session state between JEE web applications through WebLogic session descriptor of sharing-enabled
2Session state in Java Web application is associated with a single (user) browser session on the one hand and typically with a specific web application on the other (server side) hand. Session state is created and maintained in the context of a usually a single web application. However…
We ran into a situation where our web application was assuming gigantic proportions. To complex to quickly deploy or even easily build, compile and test. On closer inspection, it was quickly revealed that the application really consisted of a number of relatively independent modules – say one for each of the options in the main menu and one for the entry point – main menu, login, manage user preferences etc. From a functional point of view, the big web app monster was by and large a collection of almost individual web applications. Almost because a substantial number of navigations took place between pages in these modules. And some context data – including credentials – should be passed on these navigations. The application was developed with such information stored in the session scope – as all modules always have access to a (shared) session scope, it was thought.
We got to the point where for More >
JavaOne 2010 – Keynote by Thomas Kurian – Java Strategy and Directions
0JavaOne started this morning with the first many dozens sessions and the Java Pavilion & Exhibition hall. The official kick off so to speak took place tonight, with Thomas Kurian’s keynote, in which he unfolded Oracle’s plans for Java. He wants to make it abundantly clear how important Java is to Oracle, how important the unity of the community around Java is and how urgent it is for him (almost on a personal level) to see the Java platform and community regain momentum, after a period of FUD and near stand-still. His keynote contained a number of very concrete statements and plans that Oracle intends to execute. He did not necessarily say this out loud – but between the lines I clearly read that Sun had fantastic ideas but not necessarily the capacity (and at some point obviously the budget) to deliver on them and that Oracle intends to bring its ability to execute and deliver (see for example the acquisition and subsequent integration of BEA and others) to the table and get Java moving once more.
His announcements included:
- Java SE 7 will be available in the Summer of 2011 -provided JCP joins in and approves.
- Java SE 8 will follow in 12-18 months after SE 7 – provided JCP….
- the More >
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