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Orika: Mapping JAXB Objects to Business/Domain Objects

This post looks at mapping JAXB objects to business domain objects with Orika. Earlier this month, I covered the same mapping use case using reflection-based Dozer. In this post, I’ll assume the same example classes need to ...
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Advanced Java generics: retreiving generic type arguments

After their introduction in the JDK5, Java generics quickly became an integral element of many Java programs. However, as easy Java generics seem at first glance, as quickly a programer can get lost with this feature. Most Java pr ...
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Java 8 parameter name at runtime

Java 8 will be introducing an easier way to discover the parameter names of methods and constructors. Prior to Java 8, the way to find the parameter names is by turning the debug symbols on at the compilation stage which adds meta ...
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Playing with futures

During job interviews we often give Scala developers a simple design task: to model a binary tree. The simplest but not necessarily best implementation involves Option idiom:                 ...
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MongoDB “Lightning Fast Aggregation” Challenged with Oracle

What does “Scale” even mean in the context of databases? When talking about scaling, people have jumped to the vendor-induced conclusion that:SQL doesn’t scale NoSQL scalesIt is very obvious that NoSQL vendors make such ...
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Project Student: Webservice Client with Jersey

This is part of Project Student. Other posts are Webservice Client with Jersey, Business Layer and Persistence with Spring Data. The first layer of the RESTful webapp onion is the webservice client. It can be used to mimic web pag ...
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Give Credit Generously

I had a boss who was great at saying, “Terri did this. Jen did that. JR did this other thing.” We all knew who had learned about different areas of the system, who had succeeded at which parts of testing or development or proj ...
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Performance tuning – measure don’t guess

In my performance tuning career I have given the advice to measure and not guess more often than I can recall. And in many cases the target of this advice has given up after looking at the monolithic 500,000 LOC legacy application ...
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The infamous sun.misc.Unsafe explained

The biggest competitor to the Java virtual machine might be Microsoft’s CLR that hosts languages such as C#. The CLR allows to write unsafe code as an entry gate for low level programming, something that is hard to achieve o ...
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MongoDB Facts: Lightning speed aggregation

In my previous post, I demonstrated how fast you can insert 50 millions time-event entries with MongoDB. This time we will make use of all that data to fuel our aggregation tests. This is how one time-event entry looks like:   ...
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