Oliver Drotbohm opened SPR-10443 and commented

Currently you can inject any Spring bean into clients through constructor injection. A JPA EntityManager is an exception to that. Constructor injection has the benefit of being able to design classes in an immutable way. Also, you communicate required dependencies through it easily. Sadly, @PersistenceContext cannot be used on a constructor parameter and this probably won't change befor JPA 2.2 (giving 2.1 is close to final).

It would be cool to simply be able to inject EntityManager instances through either @Autowired or @Inject.

Issue Links:

• DATAJPA-445 Enable support to inject EntityManager via constructor

12 votes, 17 watchers