Programmatic SchemaExport / SchemaUpdate with Hibernate 5 and Spring 4

Question

With Spring 4 and Hibernate 4, I was able to use Reflection to get the Hibernate Configuration object from the current environment, using this code:

@Autowired LocalContainerEntityManagerFactoryBean lcemfb;  EntityManagerFactoryImpl emf = (EntityManagerFactoryImpl) lcemfb.getNativeEntityManagerFactory(); SessionFactoryImpl sf = emf.getSessionFactory(); SessionFactoryServiceRegistryImpl serviceRegistry = (SessionFactoryServiceRegistryImpl) sf.getServiceRegistry(); Configuration cfg = null;  try {     Field field = SessionFactoryServiceRegistryImpl.class.getDeclaredField("configuration");     field.setAccessible(true);     cfg = (Configuration) field.get(serviceRegistry); } catch (NoSuchFieldException | SecurityException | IllegalArgumentException | IllegalAccessException e) {     e.printStackTrace(); }  SchemaUpdate update = new SchemaUpdate(serviceRegistry, cfg); 

With Hibernate 5, I must use some MetadataImplementor, which doesn't seems to be available from any of those objects. I also tried to use MetadataSources with the serviceRegistry. But it did say that it's the wrong kind of ServiceRegistry.

Is there any other way to get this working?

Answer 1

Basic idea for this problem is:

implementation of org.hibernate.integrator.spi.Integrator which stores required data to some holder. Register implementation as a service and use it where you need.

Work example you can find here https://github.com/valery-barysok/spring4-hibernate5-stackoverflow-34612019

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create org.hibernate.integrator.api.integrator.Integrator class

import hello.HibernateInfoHolder; import org.hibernate.boot.Metadata; import org.hibernate.engine.spi.SessionFactoryImplementor; import org.hibernate.service.spi.SessionFactoryServiceRegistry;  public class Integrator implements org.hibernate.integrator.spi.Integrator {      @Override     public void integrate(Metadata metadata, SessionFactoryImplementor sessionFactory, SessionFactoryServiceRegistry serviceRegistry) {         HibernateInfoHolder.setMetadata(metadata);         HibernateInfoHolder.setSessionFactory(sessionFactory);         HibernateInfoHolder.setServiceRegistry(serviceRegistry);     }      @Override     public void disintegrate(SessionFactoryImplementor sessionFactory, SessionFactoryServiceRegistry serviceRegistry) {     } } 

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create META-INF/services/org.hibernate.integrator.spi.Integrator file

org.hibernate.integrator.api.integrator.Integrator 

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import org.hibernate.boot.spi.MetadataImplementor; import org.hibernate.tool.hbm2ddl.SchemaExport; import org.hibernate.tool.hbm2ddl.SchemaUpdate; import org.springframework.boot.CommandLineRunner; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication;  @SpringBootApplication public class Application implements CommandLineRunner {      public static void main(String[] args) {         SpringApplication.run(Application.class, args);     }      @Override     public void run(String... args) throws Exception {         new SchemaExport((MetadataImplementor) HibernateInfoHolder.getMetadata()).create(true, true);         new SchemaUpdate(HibernateInfoHolder.getServiceRegistry(), (MetadataImplementor) HibernateInfoHolder.getMetadata()).execute(true, true);     } }