Table of contents

1. Grails Notes
   1. Access to session and hibernate
      1. getting session
   2. get hibernate datastore in session
      1. Get hibernatedatasource
      2. get table columns
      3. get data bindings/properties/class/domain table/declared fields
      4. Get A Service

---

Grails Notes

Access to session and hibernate

• getting session

    def sessionFactory
  

    def session = sessionFactory?.getCurrentSession()
  

    RequestContextHolder.currentRequestAttributes().getSession()
  

• get hibernate datastore in session

  • Get hibernatedatasource

    hibernate datastore ex.

       public class HibernateExample {
             @Autowired
             HibernateDatastore hibernateDatastore;
               
             @Autowired
             DatabaseProvisioningService databaseProvisioningService;
               
             @Listener(User)
             void onUserPostInsertEvent(PostInsertEvent event) {
                 String username = event.getEntityAccess().getPropertyValue("username");
                 DatabaseConfiguration databaseConfiguration = databaseProvisioningService.findDatabaseConfigurationByUsername(username);
                 hibernateDatastore.getConnectionSources().addConnectionSource(databaseConfiguration.dataSourceName, databaseConfiguration.configuration);
             }
         }
    

  • get table columns

    hibernateDatastore.getSessionFactory().getClassMetadata(GroupCompare).getProperties().sort()
    

    ctx.sessionFactory.getClassMetadata(Team).attributes.collect { it.name }
    

  • get data bindings/properties/class/domain table/declared fields

    def mapping = org.grails.orm.hibernate.cfg.GrailsDomainBinder.getMapping(UserGroup)
    

    def mapping = org.grails.orm.hibernate.cfg.GrailsDomainBinder.getMapping(UserGroup)
    

    org.grails.orm.hibernate.cfg.GrailsDomainBinder.getMapping(groupCompare.class).class.declaedFields
    

  • Get A Service

  1.  public class HibernateExample {
          
           @Autowired
           HibernateDatastore hibernateDatastore;
           UserDataService userDataService;
          
           UserService(HibernateDatastore hibernateDatastore) {
               this.userDataService = hibernateDatastore.getService(UserDataService);
           }
        }
     

  2.   (YourService)Holders.grailsApplication.mainContext["yourService"];
     

  3.   applicationContext."${yourServiceName}".serviceMethod();
     

  4.   ctx.getBean("userGroupService");
     

  5.   Holders.applicationContext.getBean("myService");
     

   class HibernateExample {

    ApplicationContext ctx = (ApplicationContext) ServletContextHolder
            .getServletContext()
            .getAttribute(GrailsApplicationAttributes
                    .APPLICATION_CONTEXT)

    def statisticsService = (StatisticsService).ctx.getBean("statisticsService ")
}