CODEWITHSUNDEEP
spring-boot
pheromix
pheromix

Reputation: 19287

How to inject the EntityManagerFactory?

In this tutorial it is said that

Spring Boot configures Hibernate as the default JPA provider, so it’s no longer necessary to define the entityManagerFactory bean unless we want to customize it.

, so how to autowire it inside a class ?

Upvotes: 0

Views: 491

Answers (1)

ManojP
ManojP

Reputation: 6248

I have used it one of my projects. Please check the below code for your reference.

@Component 
public class XXXServiceImpl {


    private EntityManagerFactory emf;

    @Autowired
    private DataSource dataSource;

    private final String DropQuery = "DROP  table "+Schema_Name + ".";


    @Autowired
    public XXXServiceImpl(EntityManagerFactory emf) {
        Assert.notNull(emf, "EntityManagerFactory must not be null");
        this.emf = emf;
    }

    public void dropAllChildTables(String tableNamePrefix) {

        EntityManager entityManager = emf.createEntityManager();
        entityManager.getTransaction().begin();

        List<?> tables = entityManager.createNativeQuery(ListTableQry).setParameter("namePrefix", tableNamePrefix).getResultList();

        tables.forEach(tname -> {
            String query = DropQuery + "\"" + tname + "\"";
            entityManager.createNativeQuery(query).executeUpdate();
        });

        entityManager.getTransaction().commit();
        entityManager.close();
    }
}

Upvotes: 2

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