About Piotr Nowicki

Piotr is a Java fascinate since his computer science studies (2007). He's currently working as a senior Java EE developer in utilities and industry sector. He's mostly interested in designing and development of web applications using Java EE technology stack.

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Asynchronous CDI Events

Few days ago, during our regular code review, one of my colleagues raised a question what would happen — and if it’s even possible — when a CDI Observer (so a method with parameter ...
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Java EE 7: JMS 2.0 With Glassfish v4

Java EE 7 has been recently accepted by the Executive Committee. This means that soon we should have Java EE 7 application servers available on the market. One of the specifications ...
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Using JGroups Directly From JBoss AS 7 Component

JGroups is Bela Ban‘s piece of software for reliable message exchange that is highly configurable and can use either TCP or UDP as a transport protocol. Basically – you run the ...
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JPA and CMT – Why Catching Persistence Exception is Not Enough?

Being in EJB and JPA world using CMT (Container Managed Transactions) is very comfortable. Just define few annotations to demarcate transaction boundary (or use the defaults) and that’s ...
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Types of Entity Managers: Application-managed EntityManager

JPA specification defines few types of EntityManagers / Persistence Contexts. We can have:extended and transactional-scoped EntityManagers, container-managed or application-managed ...
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EJB Inheritance is Different From Java Inheritance

Despite the fact that EJB inheritance sometimes uses Java inheritance — they’re not always the same. Just as you could read in my previous post, EJB doesn’t have to implement ...
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Defining EJB 3.1 Views (Local, Remote, No-Interface)

This post will talk about possible ways of defining EJB views using annotations (I’ll just mention about using EJB Deployment Descriptor at the end.) I’ll focus on the most current ...
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