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The Java EE 6 Example – Galleria Part 2

You probably followed me with the last Java EE 6 Galleria example posts. The first one was the basic introduction. The second one was about running it on latest GlassFish. Someone ...
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Drools Guvnor – Manage access

Externalize business or technical rules is very important for scalable applications but the BRMS service access should be managed. guvnor provides control UI access and operations using ...
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Using slf4j with logback tutorial

In current post I am going to show you how to configure your application to use slf4j and logback as logger solution. The Simple Logging Facade For Java (slf4j) is a simple facade ...
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Using Delayed queues in practice

Often there are use cases when you have some kind of work or job queue and there is a need not to handle each work item or job immediately but with some delay. For example, if user ...
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What additional features does Java EE 6 have to move from Spring?

I am a senior java developer who has to work on the technologies chosen by the application architect. At the maximum I can express my opinion on a particular technology, I can’t ...
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Lazy JSF Primefaces Datatable Pagination – Part 2

The page code is very simple and there is no complication. Check the “index.xhtml” code: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html ...
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Why Math.round(0.499999999999999917) rounds to 1 on Java 6

Overview There are two types of error representation error and arithmetic rounding error which are common in floating point calculations. These two error combine in this simple example, ...
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Quartz scheduler plugins – hidden treasure

Although briefly described in the official documentation, I believe Quartz plugins aren’t known enough, looking at how useful they are. Essentially plugins in Quartz are convenient ...
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Lazy JSF Primefaces Datatable Pagination – Part 1

Today we will do JSF datatable pagination with a Lazy List with a view scoped managed bean. What all those words/expressions mean? There are several JSF frameworks today that provide ...
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JAXB and Unmapped Properties

JAXB (JSR-222) is configuration by exception, meaning that there is a default mapping applied to domain objects. This means that sometimes you need to explicitly exclude a field/property. ...
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