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Avoid Lazy JPA Collections

Hibernate (and actually JPA) has collection mappings: @OneToMany, @ManyToMany, @ElementCollection. All of these are by default lazy. This means the collections are specific implementations ...
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Play! Framework: Why Did I Fall in Love with it

Some time ago, I was the tech lead for a few very large deployments on the Real Estate market for companies like Fannie Mae, Freddie Mac, Foreclosure.com and HUD. We were running that ...
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Java EE6 CDI, Named Components and Qualifiers

One of the biggest promises java EE6 made, was to ease the use of dependency injection. They did, using CDI. CDI, which stands for Contexts and Dependency Injection for Java EE, offers ...
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Parametrizing custom validator in JSF 2

Writing a custom validator in JSF 2 is not a complicated task. You implement Validator interface, add @FacesValidator annotation and insert validator declaration in faces-config.xml, ...
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Vaadin add-ons and Maven

Introduction One (of the many) thing I like about Vaadin, is its community of ‘add-ons’ to the Vaadin framework – what they call the Vaadin Directory. An ‘add-on’ is a community-contributed ...
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Apache Shiro : Application Security Made Easy

Considering that JAVA is over 10+ years old, the number of choices for application developers that need to build authentication and authorization into their applications is shockingly ...
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Java EE6 Events: A lightweight alternative to JMS

The feature I’m going to talk about today is the event mechanism that is in java EE 6. The general idea is to fire an event and let an event listener pick it up. I have created this ...
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Oracle WebLogic Java Cloud Service – Behind the scenes.

More on the Open World side of happenings one big and probably unexpected announcement was that Oracle is finally supporting the cloud movement and offering their own public cloud service. ...
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Spring MVC Interceptors Example

I thought that it was time to take a look at Spring’s MVC interceptor mechanism, which has been around for a good number of years and is a really useful tool. A Spring Interceptor ...
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Java EE Past, Present, & Cloud 7

One prominent topic of the recent JavaOne 2011 was the next major Java EE 7 release. As stated in the keynotes, the work on it is well underway. It will contain the 28 specifications ...
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