How to silently truncate strings while storing them when they are longer than the column length definition?

Question

I have a web app, using EclipseLink and MySQL for storing data. Some of these data are strings, ie varchars in the DB. In the code of entities, the strings have attributes

Answer 1

Since the Exception seems to be raised at the database level during the commit() process, a before-insert Trigger on the target table/s could truncate the new values before they are committed, bypassing the error.