I’ve recently been working with the [Camel JPA] (http://camel.apache.org/jpa.html) component for moving data from one of our SQL servers to our messaging system.

We have a number of Entity POJOs defined that contain a named query which the JPA component uses in order to query the database to select the appropriate records that need to be processed. Everything was working great and I decided to move these beans to a separate library that could be shared with other applications. However, once I did this the original application started encountering the following error.

java.lang.IllegalArgumentException: No query defined for that name [AllinboundMessagesSqlBean.findByProcessed]

I checked the classpath and the beans were in fact being found, but the named queries on the beans were not being found. It took some research, but the solution to the problem ended up proving to be very simple.

The change was to explicitly add the entity classes to the application’s persistance.xml

com.lynden.json.beans.AllinboundLoopBean
com.lynden.json.beans.AllinboundMessagesSqlBean

Once the classes were defined in the file, the app was then able to find these entity beans that were in a separate .jar. Hopefully this will help others out there who may have run into a similar issue.

twitter: @RobTerpilowski