|author||Nigel Magnay <email@example.com>||Sun Aug 17 15:00:47 2014 +0100|
|committer||Nigel Magnay <firstname.lastname@example.org>||Tue Oct 07 15:14:51 2014 +0100|
Allow JPA properties to be Objects as well as simple strings. JpaPersistService takes a parameter thus: Properties persistenceProperties However, this is used later to create an entity manager: Persistence.createEntityManagerFactory(persistenceUnitName, persistenceProperties); The signature for that method is (String, Map) NOT (String, Properties). If one is using Hibernate, you can pass the desired DataSource object in using that Map with Environment.DATASOURCE storing the actual object. Clearly you cannot do that if it's Properties (String->String map) Changing this so that the persistenceProperties is a Map would solves this, so you may now do (for example) DataSource ds = ...; Map p = new HashMap(); p.put( Environment.DATASOURCE, ds ); JpaPersistModule jpaPersistModule = new JpaPersistModule("myapp-db") .properties(p); Since all Properties objects *are* Map instances, this is a non-breaking change. Signed-off-by: Nigel Magnay <email@example.com>
Now, out in 4.0 Beta4!
Put simply, Guice alleviates the need for factories and the use of new in your Java code. Think of Guice's @Inject as the new new. You will still need to write factories in some cases, but your code will not depend directly on them. Your code will be easier to change, unit test and reuse in other contexts.
Guice embraces Java's type safe nature, especially when it comes to features introduced in Java 5 such as generics and annotations. You might think of Guice as filling in missing features for core Java. Ideally, the language itself would provide most of the same features, but until such a language comes along, we have Guice.
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