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Accessing MySQL from Embedded GlassFish .ln { color: rgb(0,0,0); font-weight: normal; font-style: normal; } .s0 { color: rgb(128,128,128); } .s1 { } .s2 { color: rgb(0,0,255); } .s3 { color: rgb(128,128,128); font-weight: bold; } .s4 { color: rgb(255,0,255); } .s5 { color: rgb(0,0,128); } Using MySQL database with GlassFish is nothing new. However I just wanted to share a small note on how I...
on Apr 4, 2011
In this post I show how simple is to integrate mybatis and spring framework. The requirements are: Spring Framwork 3.0.5 + dependencies Mybatis 3.0.3 + dependencies aopalliance-1.0 mybatis-spring-1.0.0-RC3 lombok CoreJavaBeans1.0.1 + dependencies   First of all, let's define a model bean: <span class="line-number"> 1</span> <span class="comment">/*...
on Dec 23, 2010
Automated functional tests are key to ensure the quality of large applications in incremental development processes. In contrast with unit tests where each test is supposed to be independent from the outside environment, functional tests are really integration tests: in order for them to run properly the process must start from a well known state. The majority of enterprise applications use a...
on Oct 14, 2010
One of the big focuses of Maven 3 is to provide a more reliable, more stable and better performing build tool. And one big area of improvement is Performance. Maven 3 has the (new and somewhat experimental) ability to analyze your project structure, and the dependencies between your modules, to figure out which modules can be built in parallel. This has major performance implications for larger...
on Sep 7, 2010
In my opinion, SQL Anyhwere is the best RDBMS I can think of. I can remember when we started distributing it in Germany back in the early 1990ies, as one of the first early adopters in this country. Since then, we provided it to hundreds of enterprises, from single-person laptop-only ones to large ones spanning replicated installations crossing country borders. So call me biased in that...
on Jul 3, 2010
The problem at hand is that EclipseLink (great project lead by James Sutherland) does not use a query cache when dealing with ReadAll queries, i.e: all calls to getResultList() go to the database.  Some object-level caching is performed by avoiding construction of new objects based on the primary key values the database call returns.  EclipseLink compares the PK values returned by the...
on Jun 1, 2010
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on May 6, 2010
Last week's kickoff of FESI's research program went very well. There are a number of folks (>500) who are now following this blog on, and a number who have gotten involved.  While we wait for more folks, we'll be researching new technologies, the first being NOSQL databases.  If the kind of topics we're research interests you, please feel free to join the project;...
on May 5, 2010
If you wonder whether the style of use with JDBC API has an impact of performance, you might like to read my latest blog entry on Head Crashing Informatics. While the entry mostly is about tuning SQL Anywhere's BLOB handling performance, it contains an interesting aspect: There are three ways to deal with BLOBs in JDBC, and the performance difference is tremendous. While obvious for the JDBC...
on Apr 10, 2010
A big part of  my current company work is related to managing infrastructure hosted in cloud computing environments. I have recently released an open source project (Rain Toolkit) to help ease the management of Amazon EC2 objects. It is a set of command-line tools for performing day-to-day administration tasks. Since Rain Toolkit deals with the management of EC2 resources, it seemed only...
on Mar 16, 2010
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on Feb 18, 2010
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on Feb 18, 2010
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on Feb 10, 2010
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on Feb 9, 2010
On last saturday I have run a few experimental benchmarks on the typical new generation technology stack (or part of it). What I exactly did was running iAnywhere 10.0.1 database and Sun Application Server 9 (aka "Glassfish" aka "Java EE 5 SDK") in a VMware Server 1.0.3 virtual machine on my private laptop (AMD Turion 64 X2, 2 GB RAM). The benchmark was done using a small test...
on Jan 3, 2010
I used my free day to do some more performance benchmarking using EJB 3.0 and WebServices. As I wrote in my last blog entry on this topic, I was astonished what performance is possible even in a VM on my cheat laptop. But now I invested some more time to tune my laptop (running JkDefrag gave its disk an amazing push) and do an optimization in the application itself: Using precompiled queries...
on Jan 3, 2010


In JUG-AFRICA we started an Open Source project to manage the BIG ANNUAL EVENTS for our JUGs. The first release will be available in the early second half of January. The application will provide all services bellow via the REST Web services :     - Appointment Manager - Conference Manager - Paper reviews and approval Manager - Profile Manager - Registration Manager - Sponsorship...
on Jan 2, 2011
FESI Research Program Overview FESI is the Free and open source software Enterprise Solutions Institute. We are a research program designed to study tomorrow's internet technologies as a means to teach folks in the local workforce how to use technologies our customers will likely want to implement.  We also perform this research to prepare local engineers with the knowledge and...
on Apr 27, 2010
For meanwhile more than 25 years I am writing computer programs. More than a decade I spent with programs accessing databases, virtually always relational ones. I soon learned that this is rather hard work. Not only that you need to know about the theory behind RDBMS iself, but also you need to know the technical APIs (like ODBC, ADO, RDO, JDBC, JDO, JPA, CMP, ...), the structure of...
on Feb 28, 2010


My name is Haim Michael, I am the General Manager for Zindell Technologies and I am an eternal student and a lecturer. I chose to develop the abelski web site for the benefit of all people world wide. I have started to develop it in November 2007 and I continuously update its courses and add new ones. All courses on this web site are available for free personal and academic usage.  The...
on Oct 4, 2010