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Everything Developers Need To Know About xPaaS

I’ve been reading a lot about Red Hat products lately and being interested in cloud and such since some years now, it’s pretty obvious for me to look into the cloud offerings ...
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Secure REST services using Spring Security

Overview Recently, I was working on a project which uses a REST services layer to communicate with the client application (GWT application). So I have spent a lot of to time to figure ...
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Analysing the performance degradation/improvements of a Java EE application with interceptors

When you are developing a Java EE application with certain performance requirements, you have to verify that these requirements are fulfilled before each release. An Hudson job that ...
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Monitoring and Filtering Application Log to Mail with log4j

In today’s post I’m going to show you how to filter log statements into a warning email. This came out of a necessity to monitor a few critical points of one application I was working ...
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The anatomy of Hibernate dirty checking

Introduction The persistence context enqueues entity state transitions that get translated to database statements upon flushing. For managed entities, Hibernate can auto-detect incoming ...
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JPA Tutorial – Setting Up JPA in a Java SE Environment

JPA stands for Java Persistence API, which basically is a specification that describes a way to persist data into a persistent storage, usually a database. We can think of it as ...
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URL shortener service in 42 lines of code in… Java (?!) Spring Boot + Redis

Apparently writing a URL shortener service is the new “Hello, world!” in the IoT/microservice/era world. It all started with A URL shortener service in 45 lines of Scala ...
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Clustered Idempotent Consumer Pattern with Infinispan

I’ve created a small project that shows how to use JBoss Infinispan with Apache Camel and the Idempotent Consumer Pattern to guarantee a message will not be processed twice in ...
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The dark side of Hibernate AUTO flush

Introduction Now that I described the the basics of JPA and Hibernate flush strategies, I can continue unraveling the surprising behavior of Hibernate’s AUTO flush mode. Not all queries ...
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Validation groups in Spring MVC

Validation constraints in Bean Validation may be added to one or more groups via groups attribute. This allows you to restrict the set of constraints applied during validation. It ...
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