Author Archives: Jesper Udby

About Jesper Udby

I'm a freelance computer Geek living in Denmark with my wife and 3 kids. I've done professional software development since 1994 and JAVA development since 1998.

Securing J[2]EE applications, part 1

Posted on January 24, 2010 by Jesper Udby

I’m writing a few articles about securing J2EE applications. The setup is a Glassfish v2 as application server and PostgreSQL v8.3 as database server, keeping it open-source and free 🙂 This first part discusses a simple setup where only a … Continue reading →

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Trusting any “secure” host

Posted on January 23, 2010 by Jesper Udby

My main concern is developing server-side JAVA-applications: J[2]EE applications. When working with hobby-projects, I’m often faced with situations where I need to call other “third-party” applications over HTTP, in order to obtain some information important to me in specific situations. … Continue reading →

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Writing JDBC code: resource cleanup and exception handling

Posted on March 29, 2008 by Jesper Udby

No matter how nice an ORM tool used in the project, CMP, Hibernate or JPA, You will eventually have to start writing “low-level” JDBC code. Most often for performance reasons, sometimes just to utilize some database-vendor-specific feature. Or calling stored … Continue reading →

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The “changing the database” experience

Posted on June 17, 2007 by Jesper Udby

I have been involved in Enterprise JAVA projects since 1998. Almost all projects have had an RDBMS “behind” it, mostly Oracle and DB2. All the projects have been some custom defined application often based on existing infrastructure, and the database … Continue reading →

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Real world distributed transactions in J2EE – Not ?

Posted on June 16, 2007 by Jesper Udby

I’m on this project where we develop a component. This is a J2EE component, it has its own database and it does some mainframe communication. This component is to be deployed on a WebSphere application server, version 6.1 (WAS). The … Continue reading →

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Why I love PostgreSQL

Posted on May 22, 2007 by Jesper Udby

Now, I’ve written some ranting about why I hate MySQL, now it is time to write about another Open Source RDBMS, PostgreSQL. In this blog I am going through why I think PostgreSQL is a great database – comparable with … Continue reading →

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An Open Source encounter

Posted on May 14, 2007 by Jesper Udby

I really like Open Source software. I use it a lot: Linux, apache, postfix, amavis-new, clamav, openSSL, openLDAP, PostgreSQL, PHP are just a few of the OSS products I have on my servers. When developing JAVA, I use Eclipse, Ant, … Continue reading →

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Why I Hate MySQL

Posted on December 30, 2006 by Jesper Udby

MySQL databases have been offered by most web hosting companies for a couple of years. This is the main reason I still have to deal with this product, which claims to be an “enterprise ready” relational database. Unfortunately these companies … Continue reading →

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