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Package your classes by Feature and not by Layers

Most of the enterprise Java applications share some similarities in their design. Mostly the packaging of these applications are driven by the framework used by them like Spring, EJBs ...
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Spring MVC + Hibernate + Maven: CRUD operations example

In this article I want to examine an example of Spring MVC + Hibernate + Maven usage. This set of technology implies basic knowledge of the domain area. So I will try to explain all ...
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Understanding Dynamic Proxy: Spring AOP Basics

Why AOP : To Understand AOP(Aspect Oriented Programming), we need to understand Cross Cutting Concerns in software development . In every project , there is some amount of code which ...
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Google Guava Cache with regular expression patterns

Quite recently I’ve seen a nice presentation about Google Guava and we came to the conclusion in our project that it could be really interesting to use the its Cache functionallity. ...
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Hamcrest Matchers, Guava Predicate and Builder design pattern

Often, while coding we have to deal with some POJO objects that have dozens of fields in them. Many times we initialize those classes through a constructor having dozens of arguments ...
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Infamous Java bugs and pitfalls

In year 2000, I was in university and was on the verge of picking a language to build my career on. Java was not yet the mainstream but highly popular and on the spots. Applets were ...
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Spring MVC Form Tutorial

This tutorial will show how to handle a form submission in Spring MVC. We will define a controller to handle the page load and the form submission. You can grab the code on GitHub. Prerequisites: You ...
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HotSpot GC Thread CPU footprint on Linux

The following question will test your knowledge on garbage collection and high CPU troubleshooting for Java applications running on Linux OS. This troubleshooting technique is especially ...
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SiftingAppender: logging different threads to different log files

One novel feature of Logback is SiftingAppender (JavaDoc). In short it’s a proxy appender that creates one child appender per each unique value of a given runtime property. Typically ...
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Spring: To autowire or not to autowire

Since using Spring 2.5, I switched from the XML-based application context to the annotations. Although I find those very useful and huge time savers, I’ve always had the feeling that ...
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