part4 – Adam Bien
summary
Shows how to build RESTful endpoints with JAXB and JSON quickly, replaces many SOAP hacks, and claims you can “kill SOAP” with simple URL conventions; demonstrates switching from Hibernate to TopLink without code changes and recommends use JPA not Hibernate-specific code because JPA already abstracts JPA providers. Notes JPA EntityManager provides a transactional cache and can act like a generic DAO. Advises two persistence.xml setups (JTA for production, JDBC for tests) and says DTOs only for legacy or remote boundaries, not for internal layering.
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