Re: [hibernate-dev] Building a SessionFactory

On 21 avr. 2011, at 05:43, Steve Ebersole wrote: > I think this new API for creating a SessionFactory is starting to firm > up, so I wanted to put out another call for feedback before we get too > close to Alpha3. So at a high level there are 2 pieces of information > needed to build the SessionFactory: the ServiceRegistry and the Metadata. > > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > > The ServiceRegistry is built through a ServiceRegistryBuilder (this is a > slight recent change) > > Map config = ...; > ServiceRegistry serviceRegistry = new ServiceRegistryBuilder( config ) > ... > .buildServiceRegistry(); > > The "..." allows you to add service instances and service initiators. > Currently any (map of) configuration values is passed in the > constructor. I can be convinced to allow adding/setting of config > values as well, if everyone has a preference for that approach: > > Map config = ...; > ServiceRegistry serviceRegistry = new ServiceRegistryBuilder() > .setConfigurationData( config ) > .setOption( Environment.SHOW_SQL, > true ) > ... > .buildServiceRegistry(); > > Not sure the best method names there, to be honest which is why I opted > for passing them to ctor. Is that a Map<Object,Object> or something a bit more refined? Regardless of the map being passed to the ctor, I'd think you need to ability to set additional options (like you setOptions) Alternative names: option: setting Not really related but, now that Configuration is gone, we lose some of the type safety (like cfg.setNamingStrategy(new MyNamingStrategy() ), or am I forgetting something in how the service registry works? > > > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > > Metadata is built through a MetadataSources which represents the sources > of metadata information. > > MetadataSources metadataSources = new MetadataSources( serviceRegistry ) > .addResource( "some.hbm.xml" ) > .addAnnotatedClass( SomeEntity.class ); > Metadata metadata = metadataSources.buildMetadata(); > > > > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > > The Metadata is then used to obtain a SessionFactory. > > SessionFactory sf = metadata.buildSessionFactory(); > > > Metadata represents the "configuration time" mapping information. As of > now we will allow users to manipulate and otherwise access this > information, hence the seeming "intermediate step". These all work with > chaining: > > SessionFactory sf = new MetadataSources( serviceRegistry ) > .addResource( "some.hbm.xml" ) > .addAnnotatedClass( SomeEntity.class ) > .buildMetadata() > .buildSessionFactory(); > I guess you could have a buildMetadataSources() hosted on ServiceRegistry if you want people to use chaining methods all the way.