Re: [hibernate-dev] api/doc suggestions
On Sun, 9 Feb 2020 at 09:34, Max Rydahl Andersen <manderse(a)redhat.com>
wrote:
### Document simplest programatic configuration
(This might just be "max is stupid" issue - please tell me :)
Trying to do a simple java main method booting Hibernate I could not
figure out with the "new" metadata API a simple way to just start
Hibernate.
What is the equivalent way to do this in new metadata api:
```
new Configuration().setProperty("hibernate.dialect",
"org.hibernate.dialect.H2Dialect")
.setProperty("hibernate.connection.url",
"jdbc:h2:./sakila")
.setProperty("hibernate.connection.username",
"sa")
.buildSessionFactory();
```
Just setup dialect, give connection info and get a
sessionfactory/entitymanager ?
I found apis to start from a file containing those settings; but I
really just want a programmatic api
to use in batch script etc. without a need for external files.
In Portofino, we do this:
https://github.com/ManyDesigns/Portofino/blob/a411efb42c9f2665e913dd0116e...
It boils down to something like:
Map<String, Object> settings = new HashMap<>();
settings.put("hibernate.dialect", "...");
//etc.
ServiceRegistry standardRegistry = new
StandardServiceRegistryBuilder().applySettings(settings).build();
MetadataSources sources = new MetadataSources(standardRegistry);
sources.add{Class|Package|Jar}(...);
//etc.
SessionFactory sessionFactory =
sources.getMetadataBuilder().build().getSessionFactoryBuilder().build();
It's not exactly simple, but it could be easily wrapped in a nice
higher-order static method, I think.