Tag Archives: JPA

YN

Posted on November 2, 2014 by Jesper Udby

Yeah, I know, this isn’t rocket science. But it is rather nice 🙂 So, I’m working on this JEE project, backed by an Oracle database. Some of my work involves refactoring CMP 2.1 entities into JPA entities. Here I’m faced … Continue reading →

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Unit-testing time/timing dependent components

Posted on January 18, 2013 by Jesper Udby

I’m often faced with developing components that are depending on time or timing, one way or the other. An example can be a query that returns all “active” rows, given current date/time and where the rows have effective and expiry … Continue reading →

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Implementing a simple database semaphore

Posted on February 6, 2010 by Jesper Udby

In this article I will describe a simple technique that enables you to implement an “exclusive lock” in a distributed, even clustered, environment. The technique works with all major databases, and should work with any database that has a reasonable … Continue reading →

Posted in Databases, Java | Tagged , , , , , , , , | 11 Comments