7.2.4.3. Master 节点

### master configuration

## DirectoryProvider
# (remote) master location where information is copied to
hibernate.search.default.sourceBase = /mnt/mastervolume/lucenedirs/mastercopy

# local master location
hibernate.search.default.indexBase = /Users/prod/lucenedirs

# refresh every half hour
hibernate.search.default.refresh = 1800

# appropriate directory provider
hibernate.search.default.directory_provider = filesystem-master

## Back-end configuration
#Back-end is the default for Lucene

@MessageDriven(activationConfig = {
      @ActivationConfigProperty(propertyName="destinationType",
                                propertyValue="javax.jms.Queue"),
      @ActivationConfigProperty(propertyName="destination",
                                propertyValue="queue/hibernatesearch"),
      @ActivationConfigProperty(propertyName="DLQMaxResent", propertyValue="1")
   } )
public class MDBSearchController extends AbstractJMSHibernateSearchController
                                 implements MessageListener {
    @PersistenceContext EntityManager em;

    //method retrieving the appropriate session
    protected Session getSession() {
        return (Session) em.getDelegate();
    }

    //potentially close the session opened in #getSession(), not needed here
    protected void cleanSessionIfNeeded(Session session)
    }
}