- Recommend migrating from Spring MVC to PortletMVC4Spring.
- Provide background and link to PortletMVC4Spring article for any additional details.
- Link to new Migrating to PortletMVC4Spring article for steps on converting a portlet.
- Provide generalized upgrade strategy for any additional API/dependency changes.
- Adapt to Liferay Portal 7.2's API using the Upgrade Planner.
- Resolve its dependencies.
- Deploy it.