- The document discusses Parsek's migration from JBoss ESB to SwitchYard for their healthcare service bus. Some key points: - Parsek started with JBoss ESB 4.10 on JBoss AS 5.1 but found ESB had disadvantages like being old technology, slow redeploys, and hard to test. - They tested and migrated to SwitchYard which is EE6-based, fast to deploy, and easier to test. All ESB logic was moved to EJBs and they upgraded to JBoss AS 6.x. - For data transformations, they introduced Dozer which is easier to use than Smooks. Dozer support was added to SwitchYard