hibernate-criteria

I am retrieving a list of objects in hibernate using Criteria API. However I need lock on those objects as another thread executing at the same time will get the exact objects and only one of the thread will succeed in absence of a pessimistic lock. I tried like below, but it is not working. List esns = session .createCriteria(Reddy_Pool.class) .add(Restrictions.eq("status", "AVAILABLE")) .add(Restrictions.eq("name", "REDDY2")) .addOrder(Order.asc("id")) .setMaxResults(n) .setLockMode(LockMode.PESSIMISTIC_WRITE) //not working at all .list(); Update : I am performing an update after this

This question is to follow up with my previous question . I need to retrieve a list of complex classes. Each has a few sets in it and just a specific number of them should be retrieved. I've already read answers of these questions 1 , 2 but none of them solved my issue. I need to find a list of students that are in a specific group and located in a specific location, and their phone numbers in their address. I also need to show distance of each student to a specific coordinate. Following code works fine, the only issue is I can not retrieve list of objects for example list of emails, list of

I have 2 tables say Table1 and Table2 Now Table1 has 3 columns say t1, t2, t3 and Table2 has 2 columns t4 and t5. I have to fetch data from both tables by join but there is no mapped association between two tables in annotation or xml. Now main issue is I have to use hibernate projection to fetch selected columns from both tables say t1,t2 from Table1 and t4 from Table2. I have gone through the internet but have found examples of tables with association. Glad if there will be any guidance on this. Yes, this is supported in Hibernate. The only thing here is that we have to use HQL : 16.2. The

I am trying to create BO by joining my entity classes Criteria criteria = session.createCriteria(Report.class,"r"); criteria .createAlias("template", "t") .createAlias("constituents", "rc") .createAlias("rc.entity", "pe") .createAlias("pe.model", "m") .createAlias("pe.scenario", "s") .setProjection(Projections.projectionList() .add( Projections.property("r.Id")) .add( Projections.property("t.Typ")) .add( Projections.property("pe.bId")) .add( Projections.property("m.model")) .add( Projections.property("s.decay")) ).setMaxResults(100) .addOrder(Order.asc("r.Id")) .setResultTransformer

What is the use of setResultTransformer method in criteria API? Can someone explain this with a simple example? I read the javadocs but i am not able to understand them clearly. Regards, The default ResultTransformer for a Criteria query which does not use setProjections() will be ROOT_ENTITY . If we have Student in a ManyToMany relationship to Department a query might look like this ... Session session = (Session) getEntityManager().getDelegate(); Criteria crit = session.createCriteria(Student.class) .createAlias('departments', 'department'); This query will return duplicates. But set the