About Michal Jastak

Michał is a Chief Technology Officer in Java Division of AIS.PL, company developing mostly Web Applications of different kind, usually e-Government related.

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JPA – Querydsl Projections

In my last post: JPA – Basic Projections – I’ve mentioned about two basic possibilities of building JPA Projections. This post brings you more examples, this time ...
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JPA – Should I become a laziness extremist?

When you spoke with the Developers about mapping objects to relational databases, they very often complain about poor JPA performance, unpredictable behavior of JPA Providers, etc. ...
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JPA – Hibernate – Type mapping on package level

When we are finally mature enough to use some custom types mapping in JPA, we usually stuck with some provider specific solution, because JPA itself doesn’t define any mechanism ...
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Spring’s Web MVC – Redirect to the Memory Leak

They say that one rock can cause an avalanche. Lately, one of my Colleagues, Marcin Radoszewski, gave me such a rock. You’ll probably never guess what it is, but there is a chance, ...
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Customize PMD in Eclipse with your own rules

PMD is very nice Java code scanner which helps you avoid potential programming problems. It can be easily extended to your needs, and this post will bring you simple example of custom ...
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JSON – Jackson to the rescue

Sometimes you have to fetch some data from the server in JavaScript, JSON is pretty good choice for this task. Let’s play with the Employer – Employee – Benefit example ...
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FindBugs and JSR-305

Suppose that group of developers work in parallel on parts of big project – some developers are working on service implementation, while others are working on code using this ...
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Spring MVC – Flash Attributes

Latest Spring Framework incarnation (3.1) brought interesting feature called Flash Attributes. It is remedy for the problem mentioned a long time ago, in one of my posts: Spring MVC ...
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Spring Insight – Web Application Profiling

Are you writing Web Applications using Spring Framework? Have you ever thought what’s going on under the hood? Why your application is responding so slowly? Why the snail outside ...
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JBoss Modules Example – Modular Web Application

Recently I read Why there is no standard for developing real modular web applications? by Patroklos Papapetrou (also featured in Java Code Geeks). Inspired by this article I decided ...
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