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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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Taking over the Codebase, Solving the Spaghetti Crisis

We’ve all been there. Somebody asks if you can take a look at their website that has been stagnant for a while. Something small needs to be changed. You feel up for a challenge, so ...
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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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End of ERP as we know it?

A friend of mine on Facebook drew my attention to this blog post, ‘End of ERP’ by Tien Tzuo on Forbes.com. With the professional lives of millions tied to ERP in some ...
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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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Infrastructure, Technical Debt, and Automated Test Framework

I’ve had several conversations in email and with clients recently that have all been about this question: “What do we do about our infrastructure?” Either the project or the program ...
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What Refactoring is, and what it isn’t

Sometimes a programmer will come to me and explain that they don’t like the design of something and that “we’re gonna need to do a whole bunch of refactoring” to make it right. ...
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