org.springframework.orm.hibernate.SpringSessionContext Maven / Gradle / Ivy

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package org.springframework.orm.hibernate;

import javax.persistence.PersistenceException;

import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.context.spi.CurrentSessionContext;
import org.hibernate.engine.spi.SessionFactoryImplementor;
import org.springframework.orm.jpa.EntityManagerHolder;
import org.springframework.transaction.support.TransactionSynchronizationManager;

@SuppressWarnings("serial")
public class SpringSessionContext implements CurrentSessionContext {
  public SpringSessionContext(SessionFactoryImplementor sessionFactory) {
  }

  @Override
  public Session currentSession() throws HibernateException {
    for (Object value : TransactionSynchronizationManager.getResourceMap().values()) {
      if (value instanceof EntityManagerHolder) {
        try {
          return ((EntityManagerHolder) value).getEntityManager().unwrap(Session.class);
        }
        catch (PersistenceException e) {
          throw new HibernateException(e);
        }
      }
    }
    throw new HibernateException("Could not obtain transaction-synchronized Session for current thread");
  }
}