Tomcat, Struts, Tiles and Hibernate Migration
I had an old ‘home’ project that was based on the following technologies: (1) Tomcat (2) Hibernate (3) MySQL (4) Struts 1x (5) Tiles 1x I had developed this in 2004-2005 for a user-experience experiment I had designed. I just decided to upgrade the technologies to : (1) Geronimo (2) OpenJPA (3) MySQL (4) Struts 2 (5) Tiles 2.2x Why ? Mainly to experience what a migration path might be. As I go through the effort – it turns out that there is no easy migration path. OpenJPA is vastly different from Hibernate. Struts 1x and Struts 2x have very little in common. It is a full rewrite. Tiles 2x has the most common features deprecated, and it too is a rewrite – given the jsp pages need to be updated. The latest version of Tiles is incompatible with the latest version of Struts (as of May 2010). java.lang.NullPointerException org.apache.tiles.definition.UnresolvingLocaleDefinitionsFactory.getDefinition(UnresolvingLocaleDefinitionsFac...