Hibernate Configuration for File Config via code

Question

I'm using Hibernate 5 and I need to configure them using code. I have established the Connection. But the Entity classes are not mapped. So How can I do this.

Due to this I can't able to insert data into be. I got error Like a property inside embedded key is not found.

 public void initialize()
{
    configuration = new Configuration();
    setupPostgresDbConnectionProperties();

    while(!initilizeSessionFactory())
    {
        System.err.println("retrying to initilize session factory");
    }

}
public void setupPostgresDbConnectionProperties()
{
    configuration.setProperty("hibernate.dialect", "org.hibernate.dialect.PostgreSQLDialect");
    configuration.setProperty("hibernate.connection.driver_class", "org.postgresql.Driver");
    String dbUrl = String.format("jdbc:postgresql://localhost:%d/%s", appConfig.getDb_port(), appConfig.getDb_schema_name());
    configuration.setProperty("hibernate.connection.url", dbUrl);
    configuration.setProperty("hibernate.connection.username", appConfig.getDb_user_name());
    configuration.setProperty("hibernate.connection.password", appConfig.getDb_pass());
    configuration.setProperty("hibernate.hbm2ddl.auto", "update");

}
private void loadEntitiesClasses(String packageName)
{
    if(packageName == null || packageName.length() == 0)
    {
        packageName = "com.jhonny.SharePointReports";

        Set<Class<?>> entityClasses = EntityScanner.getEntityClasses(packageName);
        for(Class<?> entityClass : entityClasses)
        {

            configuration.addAnnotatedClass(entityClass);
            System.out.println("Registering Entity: " + entityClass.getSimpleName());
        }
    }
}

private boolean initilizeSessionFactory()
{
    try
    {
        ServiceRegistry serviceRegistry = new StandardServiceRegistryBuilder()
                .applySettings(configuration.getProperties())
                .build();

        Set<Class<?>> entityClasses = EntityScanner.getEntityClasses("com.jhonny.SharePointReports");
        MetadataSources metadataSources = new MetadataSources(serviceRegistry);
        for (Class<?> entityClass : entityClasses) {
            metadataSources.addAnnotatedClass(entityClass);
        }


        sessionFactory = metadataSources.buildMetadata().buildSessionFactory();

        System.out.println("Session Factory is initilized successFully");
        return true;
    }
    catch (Exception e)
    {
        System.err.println("error in Session Factory creation.\n error message = " + e.getMessage());
        e.printStackTrace();
    }
    return false;
}

What EntityScanner are you using (it doesn't seem to be from Hibernate 5)? It doesn't look the Spring one I'm looking at (which seems to rely on the @EntityScan annotation). — scrhartley
– scrhartley, Commented Feb 17 at 18:14
I'm planning to load the Entity and Embeddable annotated classes manually by code. what the loadEntitiesclasses method does. Here both entity and Embedded classes are fetched. but the relation between need to be mapped manually. But Exactly i don't the steps to perform them. Do you have any ideas @scrhartley — Dood
– Dood, Commented Feb 19 at 12:54

Janakiram · Accepted Answer · 2025-02-20 06:44:16Z

2

Do check your project has the Spring-Boot-dev-tool dependency. If yes then the entity will be generated with the dev tool classLoader.

After removing the dev tool dependency it works for me. Give it a shoot.

ref this.

answered Feb 20 at 6:44

Janakiram

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1 Comment

Dood Feb 20 at 6:55

It worked. thanks @Janakiram.

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