eclipse/plugins/org.argeo.slc.client.core/src/main/java/org/argeo/slc/client/aspects/ContentProviderAspect.java

   1 package org.argeo.slc.client.aspects;
   2
   3 import org.aspectj.lang.ProceedingJoinPoint;
   4 import org.aspectj.lang.annotation.Around;
   5 import org.aspectj.lang.annotation.Aspect;
   6 import org.aspectj.lang.annotation.Pointcut;
   7 import org.hibernate.LockMode;
   8 import org.hibernate.SessionFactory;
   9
  10 /**
  11  * Intercepts all calls to get methods of the
  12  * org.argeo.slc.client.contentprovider package to insure that objects that are
  13  * to be rendered in views are correctly linked to the hibernate session.
  14  *
  15  * @author bsinou
  16  *
  17  */
  18
  19 @Aspect
  20 public class ContentProviderAspect {
  21
  22         // private final static Log log = LogFactory
  23         // .getLog(ContentProviderAspect.class);
  24
  25         private SessionFactory sessionFactory;
  26
  27         // We select here only getters from classes of the contentprovider package
  28         // that need to get data from hibernate
  29
  30         // PointCuts
  31         @Pointcut("(execution (* org.argeo.slc.client.contentprovider.ProcessListTableLabelProvider.get*(..)) && args(o,..))"
  32                         + " || (execution (* org.argeo.slc.client.contentprovider.ProcessDetailContentProvider.get*(..)) && args(o,..))")
  33         void contentProviderGetterWrapper(Object o) {
  34         }
  35
  36         // Advices
  37         @Around("contentProviderGetterWrapper(o)")
  38         public Object aroundGetWrapper(ProceedingJoinPoint thisJoinPoint, Object o)
  39                         throws Throwable {
  40
  41                 // TODO : find a mean to handle session & manager with txManager
  42                 // in order to not have to re-begin a transaction here.
  43                 sessionFactory.getCurrentSession().beginTransaction();
  44
  45                 // reassociate a transient instance with a session (LockMode.NONE).
  46                 sessionFactory.getCurrentSession().lock(o, LockMode.NONE);
  47
  48                 Object result = thisJoinPoint.proceed();
  49                 sessionFactory.getCurrentSession().getTransaction().commit();
  50                 return result;
  51         }
  52
  53         // IoC
  54         public void setSessionFactory(SessionFactory sessionFactory) {
  55                 this.sessionFactory = sessionFactory;
  56         }
  57 }