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Java High CPU troubleshooting guide – part 1

This article is part 1 of a series that will provide you with a comprehensive guide on how you can troubleshoot and identify root cause of Java high CPU problems. This guide is also applicable for standalone Java programs but de ...
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The depths of Java: API leak exposed through covariance

Java can be very tricky some times, especially in API design. Let’s have a look at a very interesting showcase. jOOQ strongly separates API from implementation. All API is in the org.jooq package, and public. Most implementation ...
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NetBeans Usability Tips

Java IDEs have come a long way since the days of JBuilder (though JBuilder seemed like a welcome advance at the time). Today’s Java IDEs (such as NetBeans, Eclipse, IntelliJ IDEA, and JDeveloper) are very advanced tools tha ...
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Test Driven Development – A Win-Win strategy

Agile practitioners talk about Test Driven Development(TDD), so do lot of developers who care about their code quality and workability. And I once upon a time, not so long ago managed to read about TDD. The crux of TDD as I have u ...
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Complete Guide To Deploy Java Web Application in Amazon Ec2 using Eclipse

Hi readers, Today I’m going to show you how to deploy simple java web application in amazon ec2 using Eclipse IDE.Before we begin we need some required things,Eclipse Java EE IDE ...
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Play 2 – modules, plugins, what’s the difference?

There seems to be some confusion regarding Play 2 modules and plugins. I imagine this is because the two are often synonymous. In Play (both versions – 1 and 2) there are distinct differences. In this post, I’m going to look a ...
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Apache Camel Tutorial – Introduction to EIP, Routes, Components, Testing and other Concepts

Data exchanges between companies increase a lot. The number of applications, which must be integrated increases, too. The interfaces use different technologies, protocols and data formats. Nevertheless, the integration of these ap ...
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ServletRequest startAsync() limited usefulness

Some time ago I came across What’s the purpose of AsyncContext.start(…) in Servlet 3.0? question. Quoting the Javadoc of aforementioned method:Causes the container to dispatch a thread, po ...
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Spring Integration with reCAPTCHA

Sometimes we just need CAPTCHA, that’s a sad fact. Today we will learn how to integrate with reCAPTCHA. Because the topic itself isn’t particularly interesting and advanced, we will overengineer a bit (?) by using Spr ...
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The Visitor Pattern Re-visited

The visitor pattern is one of the most overrated and yet underestimated patterns in object-oriented design. Overrated, because it is often chosen too quickly (possibly by an architecture astronaut), and then bloats an otherwise ve ...
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