About Rafal Borowiec

Rafal is an IT specialist with about 8 years of commercial experience, specializing in software testing and quality assurance, software development, project management and team leadership. He is currently holding a position of a Team Leader at Goyello where he is mainly responsible for building and managing teams of professional developers and testers. He is also responsible for maintaining relations with customers and acquiring new ones, mainly through consultancy. He believes in Agile project management and he is a big fan of technology, especially Java related (but not limited too). He likes sharing knowledge about software development and practices, through his blog (blog.codeleak.pl) and Twitter (@kolorobot) but also on internal and external events like conferences or workshops.

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Spring 4: CGLIB-based proxy classes with no default constructor

In Spring, if the class of a target object that is to be proxied doesn’t implement any interfaces, then a CGLIB-based proxy will be created. Prior to Spring 4, CGLIB-based proxy classes ...
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Better error messages with Bean Validation 1.1 in Spring MVC application

Bean Validation 1.1, among many new features, introduced error message interpolation using Unified Expression Language (EL) expressions. This allows to define error messages based on ...
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Lambda Expressions and Stream API: basic examples

This blog post contains a list of basic Lambda expressions and Stream API examples I used in a live coding presentation I gave in June 2014 at Java User Group – Politechnica Gedanensis ...
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Test Data Builders and Object Mother: another look

Constructing objects in tests is usually a painstaking work and usually it produces a lot of repeatable and hard to read code. There are two common solutions for working with complex ...
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Listing a ZIP file contents with Stream API in Java 8

In Java 8 java.util.zip.ZipFile was equipped with a stream method that allows navigating over a ZIP file entries very easily. In this blog post I will show a bunch of examples showing ...
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Spring 4: @DateTimeFormat with Java 8 Date-Time API

@DateTimeFormat annotation that was introduced in Spring 3.0 as a part of Formatter SPI can be used to to parse and print localized field values in web applications. In Spring 4.0, ...
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Parsing a file with Stream API in Java 8

Streams are everywhere in Java 8. Just look around and for sure you will find them. It also applies to java.io.BufferedReader. Parsing a file in Java 8 with Stream API is extremely ...
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Spice up your test code with custom assertions

Inspired by the @tkaczanowski talk during GeeCON conference I decided to have a closer look at custom assertions with AssertJ library. In my ‘Dice’ game I created a ‘Chance’ ...
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HOW-TO: Quartz Scheduler with Clustering in JEE application with MySQL

Quartz Scheduler is one of the most popular scheduling library in Java world. I had worked with Quartz mostly in Spring applications in the past. Recently, I have been investigating ...
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Spring MVC and Thymeleaf: how to acess data from templates

In a typical Spring MVC application, @Controller classes are responsible for preparing a model map with data and selecting a view to be rendered. This model map allows for the complete ...
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