I'm not sure this should be comitted to the trunk. Users can't use this code as is, because:
1. Manual/Automatic flush - they'd need to implement flush() and persist() if they have manual flush set up. 2. HibUtil - is a system specific implementation used to manage SessionFactory and Sessions - systems using Hibernate will already have some version of this they will need to leverage so this is more of a template. In fact, it won't compile without a HibUtil, so that's another problem for adding it to the trunk... A test case in examples would let us create a simple HibUtil and hibernate.cfg.xml. The test case could create a H2 DB and the tables needed... ________________________________ From: Mauricio Salatino <[email protected]> To: Rules Users List <[email protected]> Sent: Fri, October 23, 2009 4:18:16 PM Subject: Re: [rules-users] [droolsflow] - one way to use Hibernate mapping with JPAVariablePersister nice.. do you mind if I commit it to the trunk? can you create some unit testing too? On Fri, Oct 23, 2009 at 3:27 PM, Bill Tarr <[email protected]> wrote: Here is an alternate version of JPAVariablePersister for people who are already using Hibernate xml mapping files. > >This implementation has some downsides, but it seems to be working for now. > >I am going to keep using JPA to manage all the Drools Flow tables. > >My domain object persistence will be managed by Hibernate Session. > >We are also currently using automatic flush (so no code to persist domain >objects in this class) > >Obviously you need to use your own version of HibUtil. > >import java.util.logging.Level; >import java.util.logging.Logger; >import >org.drools.persistence.processinstance.variabletypes.JPAPersistedVariable; >import >org.drools.persistence.processinstance.variabletypes.VariableInstanceInfo; >import org.drools.persistence.processinstance.persisters.VariablePersister; >import org.drools.runtime.Environment; >import org.hibernate.Session; >import HibUtil; >/** > * Variation on Drools JPA Variable Persister. > * org.drools.persistence.processinstance.persisters.JPAVariablePersister > * for using variables persisted by Hibernate, while still using JPA to > * persist DroolsFlow data. > * > * @author <a href="mailto:[email protected]";>Kris Verlaenen</a> > * @author salaboy > */ >public class JPAVariablePersisterHibernate implements VariablePersister { > public VariableInstanceInfo persistExternalVariable(String name, Object o, > VariableInstanceInfo oldValue, Environment env) { > if(o == null || (oldValue != null && >oldValue.getPersister().equals(""))){ > return null; > } > try { > JPAPersistedVariable result = null; > if (oldValue instanceof JPAPersistedVariable) { > result = (JPAPersistedVariable) oldValue; > } > if (result == null) { > result = new JPAPersistedVariable(); > } > Long idValue = geHibIdValue(o); > result.setPersister(this.getClass().getName()); > result.setName(name); > result.setEntityId(idValue); > result.setEntity(o); > result.setEntityClass(o.getClass().getCanonicalName()); > return result; > } catch (Throwable t) { > Logger.getLogger(JPAVariablePersisterHibernate.class.getName()) > .log(Level.SEVERE, null, t); > throw new RuntimeException("Could not persist external variable", t); > } > } > public Object getExternalPersistedVariable( > VariableInstanceInfo variableInstanceInfo, Environment env) { > if(((JPAPersistedVariable) variableInstanceInfo) == null || >((JPAPersistedVariable) variableInstanceInfo).getEntityId() == null){ > return null; > } > System.out.println("Restoring JPAPersistedVariable id=" + >((JPAPersistedVariable) variableInstanceInfo).getId() + " entityId=" + >((JPAPersistedVariable) variableInstanceInfo).getEntityId() + " class=" + >((JPAPersistedVariable) variableInstanceInfo).getEntityClass() + " value=" + >((JPAPersistedVariable) variableInstanceInfo).getEntity()); > String varType = ((JPAPersistedVariable) >variableInstanceInfo).getEntityClass(); > > Object obj = HibUtil.getCurrentSession().get(varType, >((JPAPersistedVariable) variableInstanceInfo).getEntityId()); > HibUtil.closeCurrentSession(); > return obj; > } >/** > * Hibernate lookup to get ID column. > * @param o Dto to look up. > * @return Long id. > */ > private Long geHibIdValue(Object o) { > Session session = HibUtil.getCurrentSession(); > return (Long) session.getIdentifier(o); > } >} > > > > >_______________________________________________ >rules-users mailing list >[email protected] >https://lists.jboss.org/mailman/listinfo/rules-users > -- - http://salaboy.wordpress.com - http://www.jbug.com.ar - Salatino "Salaboy" Mauricio -
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