Hello,
There is an aspect of the tutorial I do not really comprehend at this point. Looking on the source code, in the index.jsp file, I see that a 'isFirst' variable is set. Now, the code within a JSP is (at least by my knowledge) NOT threadsafe, if not specified otherwise. In this case, this really looks like poorly desingned code, in some extreme situation, the database may be 'populated' twice ...
Am I missing something ?