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Tag Archives: openjpa

OpenJPA, HSQLDB and proper shutdown

January 14, 2010 – 8:28 pm

I’m starting to get tired of OpenJPA/HSQLDB setup that I’ve trying: it seems to give more problems than it solves. Now I discovered that the HSQL db wasn’t been properly shutdown and for reasons that I’m investigating, if the HSQL db is not propertly closed (SHUTDOWN command) it’s impossible to reopen it again. It [...]

By ruben.laguna | Posted in java, netbeans | Also tagged , , , , , , , | Comments (0)

OpenJPA: Generated SQL contains extra UPDATEs

September 18, 2009 – 5:00 pm

I’m trying to use OpenJPA to insert some entries in the database and I’m getting a strange number of UPDATEs beside the INSERTs.
I isolated the problem to the following snippet of code

private void start() {
EntityManagerFactory emf = Persistence.createEntityManagerFactory("persistencexmltest1PU");
[...]

By ruben.laguna | Posted in java | Also tagged , , , , , , , | Comments (0)

OpenJPA Enhancer Ant task in a Netbeans project

September 16, 2009 – 7:50 am

In the build.xml of the project (likely this will be a Java Class Library project), override -post-compile or -pre-jar and invoke <openjpac/>. You will need to add the build/classes and the openjpa jars to <taskdef/> and <openjpac/>. The <openjpac/> will enhance all classes mentioned in persistence.xml (which has to be in the classpath)

<?xml version="1.0" [...]

By ruben.laguna | Posted in netbeans | Also tagged , , , , , , , , , | Comments (0)