Question

所有人,

I m currently playing with Datanucleus/JDO. One thing that I like is the Type safe query system, and I want to use Datanucleus in future projects (I come from Hibernate background). I want to let the container (JBOSS 5) manage the transaction and I ve defined a data source following the instructions from a datanucleus user (datanucleus forum thread), the only problem is that i cannot understand how to get a JDOPersistenceManager, all i get from a jndi lookup is the PersistenceManager, if I try a cast to JDOPersistenceManager i will get ClassCastException. I need the JDOPersistenceManager to get a typesafe query... My configuration is the same as the one explained in the thread..

Does someone encountered the same problem before? And I wander also IF this thing would be possible at all...

感谢您的答复!

Answer 1

从来没有时间根据《刑法》进行审判,因此没有明显的进入点来让潜在的“JDOPersistenceManager......”尝试像这样的东西。

JDOPersistenceManager jdopm = 
    ((JDOTransaction)pm.getCurrentTransaction()).getPersistenceManager();

and if that works then you have a workaround until we provide an accessor in the org.datanucleus.jdo.connector.PersistenceManagerImpl class for the JDOPersistenceManager

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